author | alfadur |
Fri, 05 Jul 2019 21:16:33 +0300 | |
changeset 15214 | 58a0f2a6527b |
parent 15182 | decb2f1c682b |
child 15215 | 13041ae61ac5 |
permissions | -rw-r--r-- |
15214 | 1 |
use fpnum::{fp, integral_sqrt, FPNum, FPPoint}; |
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use std::{ |
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cmp::{max, min}, |
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ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, RangeInclusive, Sub, SubAssign}, |
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}; |
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#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
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pub struct Point { |
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pub x: i32, |
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pub y: i32, |
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} |
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impl Point { |
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pub const ZERO: Self = Self::new(0, 0); |
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#[inline] |
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pub const fn new(x: i32, y: i32) -> Self { |
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Self { x, y } |
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} |
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#[inline] |
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pub const fn diag(v: i32) -> Self { |
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Self::new(v, v) |
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} |
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#[inline] |
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pub fn signum(self) -> Self { |
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Self::new(self.x.signum(), self.y.signum()) |
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} |
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#[inline] |
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pub fn abs(self) -> Self { |
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Self::new(self.x.abs(), self.y.abs()) |
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} |
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#[inline] |
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pub const fn dot(self, other: Point) -> i32 { |
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self.x * other.x + self.y * other.y |
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} |
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#[inline] |
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pub fn max_norm(self) -> i32 { |
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std::cmp::max(self.x.abs(), self.y.abs()) |
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} |
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#[inline] |
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pub fn integral_norm(self) -> u32 { |
15214 | 48 |
let sqr = (self.x as u64).pow(2) + (self.y as u64).pow(2); |
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integral_sqrt(sqr) as u32 |
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} |
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#[inline] |
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pub const fn transform(self, matrix: &[i32; 4]) -> Self { |
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Point::new( |
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matrix[0] * self.x + matrix[1] * self.y, |
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matrix[2] * self.x + matrix[3] * self.y, |
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) |
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} |
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#[inline] |
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14627 | 61 |
pub const fn rotate90(self) -> Self { |
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Point::new(self.y, -self.x) |
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} |
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#[inline] |
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pub const fn cross(self, other: Point) -> i32 { |
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self.dot(other.rotate90()) |
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} |
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#[inline] |
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pub fn clamp(self, rect: &Rect) -> Point { |
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Point::new(rect.x_range().clamp(self.x), rect.y_range().clamp(self.y)) |
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} |
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#[inline] |
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pub const fn line_to(self, end: Point) -> Line { |
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Line::new(self, end) |
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} |
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#[inline] |
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pub const fn ray_with_dir(self, direction: Point) -> Ray { |
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Ray::new(self, direction) |
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} |
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#[inline] |
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pub const fn tangent_mul(self, x: i32) -> i32 { |
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x * self.y / self.x |
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} |
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#[inline] |
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pub const fn cotangent_mul(self, y: i32) -> i32 { |
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y * self.x / self.y |
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} |
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#[inline] |
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pub fn to_fppoint(self) -> FPPoint { |
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FPPoint::new(self.x.into(), self.y.into()) |
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} |
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#[inline] |
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pub fn from_fppoint(p: &FPPoint) -> Self { |
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Self::new(p.x().round(), p.y().round()) |
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} |
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} |
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#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
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pub struct Size { |
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pub width: usize, |
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pub height: usize, |
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} |
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impl Size { |
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pub const EMPTY: Self = Self::square(0); |
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#[inline] |
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pub const fn new(width: usize, height: usize) -> Self { |
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Self { width, height } |
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} |
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#[inline] |
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pub const fn square(size: usize) -> Self { |
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Self { |
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width: size, |
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height: size, |
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} |
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} |
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#[inline] |
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pub const fn area(&self) -> usize { |
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self.width * self.height |
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} |
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#[inline] |
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pub const fn linear_index(&self, x: usize, y: usize) -> usize { |
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y * self.width + x |
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} |
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#[inline] |
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pub fn is_power_of_two(&self) -> bool { |
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self.width.is_power_of_two() && self.height.is_power_of_two() |
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} |
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#[inline] |
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pub fn next_power_of_two(&self) -> Self { |
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Self { |
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width: self.width.next_power_of_two(), |
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height: self.height.next_power_of_two(), |
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} |
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} |
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#[inline] |
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pub const fn transpose(&self) -> Self { |
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Self::new(self.height, self.width) |
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} |
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#[inline] |
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pub fn to_mask(&self) -> SizeMask { |
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SizeMask::new(*self) |
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} |
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#[inline] |
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pub fn to_square(&self) -> Self { |
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Self::square(max(self.width, self.height)) |
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} |
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pub fn to_grid_index(&self) -> GridIndex { |
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GridIndex::new(*self) |
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} |
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#[inline] |
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pub fn contains(&self, other: Self) -> bool { |
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self.width >= other.width && self.height >= other.height |
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} |
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} |
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#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
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pub struct SizeMask { |
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size: Size, |
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} |
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impl SizeMask { |
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#[inline] |
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pub fn new(size: Size) -> Self { |
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debug_assert!(size.is_power_of_two()); |
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let size = Size { |
186 |
width: !(size.width - 1), |
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height: !(size.height - 1), |
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}; |
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Self { size } |
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} |
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#[inline] |
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193 |
pub fn contains_x<T: Into<usize>>(&self, x: T) -> bool { |
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(self.size.width & x.into()) == 0 |
|
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} |
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#[inline] |
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pub fn contains_y<T: Into<usize>>(&self, y: T) -> bool { |
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(self.size.height & y.into()) == 0 |
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} |
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#[inline] |
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203 |
pub fn contains(&self, point: Point) -> bool { |
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self.contains_x(point.x as usize) && self.contains_y(point.y as usize) |
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} |
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} |
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pub struct GridIndex { |
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shift: Point, |
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} |
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impl GridIndex { |
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pub fn new(size: Size) -> Self { |
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assert!(size.is_power_of_two()); |
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let shift = Point::new( |
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size.width.trailing_zeros() as i32, |
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size.height.trailing_zeros() as i32, |
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); |
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Self { shift } |
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} |
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pub fn map(&self, position: Point) -> Point { |
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Point::new(position.x >> self.shift.x, position.y >> self.shift.y) |
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} |
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} |
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macro_rules! bin_op_impl { |
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($op: ty, $name: tt) => { |
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impl $op for Point { |
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type Output = Self; |
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#[inline] |
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233 |
fn $name(self, rhs: Self) -> Self::Output { |
13941 | 234 |
Self::new(self.x.$name(rhs.x), self.y.$name(rhs.y)) |
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} |
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236 |
} |
13941 | 237 |
}; |
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} |
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|
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240 |
macro_rules! scalar_bin_op_impl { |
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($($op: tt)::+, $name: tt) => { |
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242 |
impl $($op)::+<i32> for Point { |
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type Output = Self; |
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244 |
|
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245 |
#[inline] |
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246 |
fn $name(self, rhs: i32) -> Self::Output { |
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247 |
Self::new(self.x.$name(rhs), self.y.$name(rhs)) |
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248 |
} |
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249 |
} |
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250 |
}; |
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251 |
} |
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252 |
|
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253 |
macro_rules! bin_assign_op_impl { |
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254 |
($op: ty, $name: tt) => { |
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255 |
impl $op for Point { |
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256 |
#[inline] |
13941 | 257 |
fn $name(&mut self, rhs: Self) { |
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258 |
self.x.$name(rhs.x); |
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259 |
self.y.$name(rhs.y); |
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260 |
} |
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261 |
} |
13941 | 262 |
}; |
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263 |
} |
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264 |
|
14146 | 265 |
macro_rules! fp_scalar_bin_op_impl { |
266 |
($($op: tt)::+, $name: tt) => { |
|
267 |
impl $($op)::+<FPNum> for Point { |
|
268 |
type Output = FPPoint; |
|
269 |
||
270 |
#[inline] |
|
271 |
fn $name(self, rhs: FPNum) -> Self::Output { |
|
272 |
FPPoint::new(rhs.$name(self.x), rhs.$name(self.y)) |
|
273 |
} |
|
274 |
} |
|
275 |
}; |
|
276 |
} |
|
277 |
||
278 |
macro_rules! left_fp_scalar_bin_op_impl { |
|
279 |
($($op: tt)::+, $name: tt) => { |
|
280 |
impl $($op)::+<Point> for FPNum { |
|
281 |
type Output = FPPoint; |
|
282 |
||
283 |
#[inline] |
|
284 |
fn $name(self, rhs: Point) -> Self::Output { |
|
285 |
FPPoint::new(self.$name(rhs.x), self.$name(rhs.y)) |
|
286 |
} |
|
287 |
} |
|
288 |
}; |
|
289 |
} |
|
290 |
||
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291 |
bin_op_impl!(Add, add); |
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292 |
bin_op_impl!(Sub, sub); |
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293 |
bin_op_impl!(Mul, mul); |
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294 |
bin_op_impl!(Div, div); |
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295 |
scalar_bin_op_impl!(Mul, mul); |
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296 |
scalar_bin_op_impl!(Div, div); |
14146 | 297 |
fp_scalar_bin_op_impl!(Mul, mul); |
298 |
fp_scalar_bin_op_impl!(Div, div); |
|
299 |
left_fp_scalar_bin_op_impl!(Mul, mul); |
|
300 |
left_fp_scalar_bin_op_impl!(Div, div); |
|
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301 |
bin_assign_op_impl!(AddAssign, add_assign); |
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302 |
bin_assign_op_impl!(SubAssign, sub_assign); |
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303 |
bin_assign_op_impl!(MulAssign, mul_assign); |
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304 |
bin_assign_op_impl!(DivAssign, div_assign); |
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305 |
|
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306 |
#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
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307 |
pub struct Rect { |
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308 |
top_left: Point, |
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309 |
bottom_right: Point, |
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310 |
} |
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311 |
|
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312 |
impl Rect { |
14717 | 313 |
pub const EMPTY: Self = Self { |
314 |
top_left: Point::ZERO, |
|
14725 | 315 |
bottom_right: Point::diag(-1), |
14717 | 316 |
}; |
317 |
||
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318 |
#[inline] |
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319 |
pub fn new(top_left: Point, bottom_right: Point) -> Self { |
14627 | 320 |
debug_assert!(top_left.x <= bottom_right.x + 1); |
321 |
debug_assert!(top_left.y <= bottom_right.y + 1); |
|
14140 | 322 |
Self { |
323 |
top_left, |
|
324 |
bottom_right, |
|
325 |
} |
|
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326 |
} |
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|
327 |
|
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328 |
pub fn from_box(left: i32, right: i32, top: i32, bottom: i32) -> Self { |
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329 |
Self::new(Point::new(left, top), Point::new(right, bottom)) |
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330 |
} |
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331 |
|
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332 |
pub fn from_size(top_left: Point, size: Size) -> Self { |
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333 |
Self::new( |
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334 |
top_left, |
14140 | 335 |
top_left + Point::new(size.width as i32 - 1, size.height as i32 - 1), |
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|
336 |
) |
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|
337 |
} |
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338 |
|
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339 |
pub fn from_size_coords(x: i32, y: i32, width: usize, height: usize) -> Self { |
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340 |
Self::from_size(Point::new(x, y), Size::new(width, height)) |
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|
341 |
} |
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|
342 |
|
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|
343 |
pub fn at_origin(size: Size) -> Self { |
14627 | 344 |
Self::from_size(Point::ZERO, size) |
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345 |
} |
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|
346 |
|
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347 |
#[inline] |
14627 | 348 |
pub const fn width(&self) -> usize { |
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349 |
(self.right() - self.left() + 1) as usize |
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|
350 |
} |
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|
351 |
|
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|
352 |
#[inline] |
14627 | 353 |
pub const fn height(&self) -> usize { |
14207 | 354 |
(self.bottom() - self.top() + 1) as usize |
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|
355 |
} |
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|
356 |
|
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|
357 |
#[inline] |
14627 | 358 |
pub const fn size(&self) -> Size { |
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|
359 |
Size::new(self.width(), self.height()) |
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|
360 |
} |
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|
361 |
|
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|
362 |
#[inline] |
14627 | 363 |
pub const fn area(&self) -> usize { |
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|
364 |
self.size().area() |
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|
365 |
} |
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|
366 |
|
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|
367 |
#[inline] |
14627 | 368 |
pub const fn left(&self) -> i32 { |
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|
369 |
self.top_left().x |
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|
370 |
} |
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|
371 |
|
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|
372 |
#[inline] |
14627 | 373 |
pub const fn top(&self) -> i32 { |
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|
374 |
self.top_left().y |
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|
375 |
} |
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|
376 |
|
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|
377 |
#[inline] |
14627 | 378 |
pub const fn right(&self) -> i32 { |
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|
379 |
self.bottom_right().x |
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|
380 |
} |
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|
381 |
|
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|
382 |
#[inline] |
14627 | 383 |
pub const fn bottom(&self) -> i32 { |
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|
384 |
self.bottom_right().y |
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|
385 |
} |
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|
386 |
|
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|
387 |
#[inline] |
14627 | 388 |
pub const fn top_left(&self) -> Point { |
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|
389 |
self.top_left |
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|
390 |
} |
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|
391 |
|
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|
392 |
#[inline] |
14627 | 393 |
pub const fn bottom_right(&self) -> Point { |
14135
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|
394 |
self.bottom_right |
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|
395 |
} |
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|
396 |
|
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|
397 |
#[inline] |
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|
398 |
pub fn center(&self) -> Point { |
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|
399 |
(self.top_left() + self.bottom_right()) / 2 |
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|
400 |
} |
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|
401 |
|
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|
402 |
#[inline] |
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|
403 |
pub fn with_margin(&self, margin: i32) -> Self { |
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|
404 |
let offset = Point::diag(margin); |
14140 | 405 |
Self::new(self.top_left() + offset, self.bottom_right() - offset) |
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|
406 |
} |
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|
407 |
|
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|
408 |
#[inline] |
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|
409 |
pub fn x_range(&self) -> RangeInclusive<i32> { |
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|
410 |
self.left()..=self.right() |
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|
411 |
} |
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|
412 |
|
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|
413 |
#[inline] |
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|
414 |
pub fn y_range(&self) -> RangeInclusive<i32> { |
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separate rectangle types based on right/bottom edge inclusivity
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diff
changeset
|
415 |
self.top()..=self.bottom() |
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|
416 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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diff
changeset
|
417 |
|
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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changeset
|
418 |
#[inline] |
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|
419 |
pub fn contains(&self, point: Point) -> bool { |
15025
dc4a12a84c92
remove RangeContains in favor of standard contains
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changeset
|
420 |
self.x_range().contains(&point.x) && self.y_range().contains(&point.y) |
14135
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|
421 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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|
422 |
|
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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changeset
|
423 |
#[inline] |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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|
424 |
pub fn contains_inside(&self, point: Point) -> bool { |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
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14134
diff
changeset
|
425 |
point.x > self.left() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
426 |
&& point.x < self.right() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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changeset
|
427 |
&& point.y > self.top() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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parents:
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diff
changeset
|
428 |
&& point.y < self.bottom() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff
changeset
|
429 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
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changeset
|
430 |
|
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
431 |
#[inline] |
14717 | 432 |
pub fn contains_rect(&self, other: &Self) -> bool { |
433 |
self.contains(other.top_left()) && self.contains(other.bottom_right()) |
|
434 |
} |
|
435 |
||
436 |
#[inline] |
|
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
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diff
changeset
|
437 |
pub fn intersects(&self, other: &Rect) -> bool { |
14726 | 438 |
self.left() <= other.right() |
14135
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
439 |
&& self.right() >= other.left() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
440 |
&& self.top() <= other.bottom() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
441 |
&& self.bottom() >= other.top() |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
442 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
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changeset
|
443 |
|
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
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diff
changeset
|
444 |
#[inline] |
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
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14135
diff
changeset
|
445 |
pub fn split_at(&self, point: Point) -> [Rect; 4] { |
14135
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff
changeset
|
446 |
assert!(self.contains_inside(point)); |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
447 |
[ |
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
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diff
changeset
|
448 |
Self::from_box(self.left(), point.x, self.top(), point.y), |
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
449 |
Self::from_box(point.x, self.right(), self.top(), point.y), |
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
450 |
Self::from_box(point.x, self.right(), point.y, self.bottom()), |
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
451 |
Self::from_box(self.left(), point.x, point.y, self.bottom()), |
14135
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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changeset
|
452 |
] |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
453 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
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diff
changeset
|
454 |
|
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
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diff
changeset
|
455 |
#[inline] |
14717 | 456 |
pub fn with_margins(&self, left: i32, right: i32, top: i32, bottom: i32) -> Self { |
457 |
Self::from_box( |
|
14725 | 458 |
self.left() - left, |
14717 | 459 |
self.right() + right, |
14725 | 460 |
self.top() - top, |
14717 | 461 |
self.bottom() + bottom, |
462 |
) |
|
463 |
} |
|
464 |
||
465 |
#[inline] |
|
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
466 |
pub fn quotient(self, x: usize, y: usize) -> Point { |
14140 | 467 |
self.top_left() + Point::new((x % self.width()) as i32, (y % self.height()) as i32) |
14135
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
468 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
469 |
} |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
470 |
|
14131 | 471 |
trait RangeClamp<T> { |
472 |
fn clamp(&self, value: T) -> T; |
|
473 |
} |
|
474 |
||
14140 | 475 |
impl<T: Ord + Copy> RangeClamp<T> for RangeInclusive<T> { |
14131 | 476 |
fn clamp(&self, value: T) -> T { |
477 |
if value < *self.start() { |
|
478 |
*self.start() |
|
479 |
} else if value > *self.end() { |
|
480 |
*self.end() |
|
481 |
} else { |
|
482 |
value |
|
483 |
} |
|
484 |
} |
|
14051
8a0d69c16cad
Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents:
13950
diff
changeset
|
485 |
} |
8a0d69c16cad
Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents:
13950
diff
changeset
|
486 |
|
14094 | 487 |
pub struct Polygon { |
14125 | 488 |
vertices: Vec<Point>, |
14094 | 489 |
} |
490 |
||
491 |
impl Polygon { |
|
492 |
pub fn new(vertices: &[Point]) -> Self { |
|
493 |
let mut v = Vec::with_capacity(vertices.len() + 1); |
|
494 |
v.extend_from_slice(vertices); |
|
495 |
if !v.is_empty() { |
|
496 |
let start = v[0]; |
|
497 |
v.push(start); |
|
498 |
} |
|
499 |
Self { vertices: v } |
|
500 |
} |
|
501 |
||
502 |
pub fn edges_count(&self) -> usize { |
|
503 |
self.vertices.len() - 1 |
|
504 |
} |
|
505 |
||
506 |
pub fn get_edge(&self, index: usize) -> Line { |
|
507 |
Line::new(self.vertices[index], self.vertices[index + 1]) |
|
508 |
} |
|
509 |
||
14124 | 510 |
pub fn split_edge(&mut self, edge_index: usize, vertex: Point) { |
511 |
self.vertices.insert(edge_index + 1, vertex); |
|
512 |
} |
|
513 |
||
514 |
pub fn iter<'a>(&'a self) -> impl Iterator<Item = &Point> + 'a { |
|
515 |
(&self.vertices[..self.edges_count()]).iter() |
|
516 |
} |
|
517 |
||
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
518 |
pub fn iter_mut<'a>(&'a mut self) -> impl Iterator<Item = &mut Point> + 'a { |
14155 | 519 |
let edges_count = self.edges_count(); |
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
520 |
let start = self.vertices.as_mut_ptr(); |
14155 | 521 |
let end = unsafe { start.add(edges_count) }; |
14140 | 522 |
PolygonPointsIteratorMut { |
523 |
source: self, |
|
524 |
start, |
|
525 |
end, |
|
526 |
} |
|
14094 | 527 |
} |
528 |
||
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
529 |
fn force_close(&mut self) { |
14133 | 530 |
if !self.vertices.is_empty() { |
14208 | 531 |
let edges_count = self.edges_count(); |
532 |
self.vertices[edges_count] = self.vertices[0]; |
|
14133 | 533 |
} |
534 |
} |
|
535 |
||
14094 | 536 |
pub fn iter_edges<'a>(&'a self) -> impl Iterator<Item = Line> + 'a { |
537 |
(&self.vertices[0..self.edges_count()]) |
|
538 |
.iter() |
|
539 |
.zip(&self.vertices[1..]) |
|
540 |
.map(|(s, e)| Line::new(*s, *e)) |
|
541 |
} |
|
14140 | 542 |
|
543 |
pub fn bezierize(&mut self, segments_number: u32) { |
|
544 |
fn calc_point(p1: Point, p2: Point, p3: Point) -> FPPoint { |
|
545 |
let diff13 = (p1 - p3).to_fppoint(); |
|
546 |
let diff13_norm = diff13.distance(); |
|
547 |
||
548 |
if diff13_norm.is_zero() { |
|
549 |
diff13 |
|
550 |
} else { |
|
551 |
let diff12_norm = (p1 - p2).to_fppoint().distance(); |
|
552 |
let diff23_norm = (p2 - p3).to_fppoint().distance(); |
|
553 |
let min_distance = min(diff13_norm, min(diff12_norm, diff23_norm)); |
|
554 |
||
555 |
diff13 * min_distance / diff13_norm / 3 |
|
556 |
} |
|
557 |
} |
|
558 |
||
559 |
if self.vertices.len() < 4 { |
|
560 |
return; |
|
561 |
} |
|
562 |
||
563 |
let delta = fp!(1 / segments_number); |
|
564 |
let mut bezierized_vertices = Vec::new(); |
|
565 |
let mut pi = 0; |
|
566 |
let mut i = 1; |
|
567 |
let mut ni = 2; |
|
568 |
let mut right_point = calc_point(self.vertices[pi], self.vertices[i], self.vertices[ni]); |
|
569 |
let mut left_point; |
|
570 |
||
571 |
pi += 1; |
|
572 |
while pi != 0 { |
|
573 |
pi = i; |
|
574 |
i = ni; |
|
575 |
ni += 1; |
|
576 |
if ni >= self.vertices.len() { |
|
577 |
ni = 0; |
|
578 |
} |
|
579 |
||
580 |
left_point = right_point; |
|
581 |
right_point = calc_point(self.vertices[pi], self.vertices[i], self.vertices[ni]); |
|
582 |
||
583 |
bezierized_vertices.extend(BezierCurveSegments::new( |
|
584 |
Line::new(self.vertices[pi], self.vertices[i]), |
|
585 |
left_point, |
|
586 |
-right_point, |
|
587 |
delta, |
|
588 |
)); |
|
589 |
} |
|
590 |
||
591 |
self.vertices = bezierized_vertices; |
|
592 |
} |
|
14094 | 593 |
} |
594 |
||
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
595 |
struct PolygonPointsIteratorMut<'a> { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
596 |
source: &'a mut Polygon, |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
597 |
start: *mut Point, |
14140 | 598 |
end: *mut Point, |
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
599 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
600 |
|
14140 | 601 |
impl<'a> Iterator for PolygonPointsIteratorMut<'a> { |
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
602 |
type Item = &'a mut Point; |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
603 |
|
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
604 |
fn next(&mut self) -> Option<<Self as Iterator>::Item> { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
605 |
if self.start == self.end { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
606 |
None |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
607 |
} else { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
608 |
unsafe { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
609 |
let result = &mut *self.start; |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
610 |
self.start = self.start.add(1); |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
611 |
Some(result) |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
612 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
613 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
614 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
615 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
616 |
|
14140 | 617 |
impl<'a> Drop for PolygonPointsIteratorMut<'a> { |
14134
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
618 |
fn drop(&mut self) { |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
619 |
self.source.force_close(); |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
620 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
621 |
} |
09f62bb046ef
actually there is a way to preserve mutable polygon iterator
alfadur
parents:
14133
diff
changeset
|
622 |
|
14094 | 623 |
impl From<Vec<Point>> for Polygon { |
624 |
fn from(mut v: Vec<Point>) -> Self { |
|
625 |
if !v.is_empty() && v[0] != v[v.len() - 1] { |
|
626 |
let start = v[0]; |
|
627 |
v.push(start) |
|
628 |
} |
|
629 |
Self { vertices: v } |
|
630 |
} |
|
631 |
} |
|
632 |
||
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
633 |
#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
14131 | 634 |
pub struct Ray { |
635 |
pub start: Point, |
|
14140 | 636 |
pub direction: Point, |
14131 | 637 |
} |
638 |
||
639 |
impl Ray { |
|
640 |
#[inline] |
|
14627 | 641 |
pub const fn new(start: Point, direction: Point) -> Ray { |
14131 | 642 |
Self { start, direction } |
643 |
} |
|
644 |
||
645 |
#[inline] |
|
14627 | 646 |
pub const fn tangent_mul(&self, x: i32) -> i32 { |
14142 | 647 |
self.direction.tangent_mul(x) |
14131 | 648 |
} |
649 |
||
650 |
#[inline] |
|
14627 | 651 |
pub const fn cotangent_mul(&self, y: i32) -> i32 { |
14142 | 652 |
self.direction.cotangent_mul(y) |
14131 | 653 |
} |
654 |
||
655 |
#[inline] |
|
656 |
pub fn orientation(&self, point: Point) -> i32 { |
|
657 |
(point - self.start).cross(self.direction).signum() |
|
658 |
} |
|
659 |
} |
|
660 |
||
661 |
#[derive(PartialEq, Eq, Clone, Copy, Debug)] |
|
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
662 |
pub struct Line { |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
663 |
pub start: Point, |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
664 |
pub end: Point, |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
665 |
} |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
666 |
|
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
667 |
impl Line { |
14627 | 668 |
pub const ZERO: Self = Self::new(Point::ZERO, Point::ZERO); |
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
669 |
|
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
670 |
#[inline] |
14627 | 671 |
pub const fn new(start: Point, end: Point) -> Self { |
672 |
Self { start, end } |
|
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
673 |
} |
14077 | 674 |
|
675 |
#[inline] |
|
676 |
pub fn center(&self) -> Point { |
|
14088
f483f844da98
component-wise division is actually useful sometimes
alfadur
parents:
14081
diff
changeset
|
677 |
(self.start + self.end) / 2 |
14077 | 678 |
} |
14106 | 679 |
|
680 |
#[inline] |
|
14131 | 681 |
pub fn scaled_direction(&self) -> Point { |
682 |
self.end - self.start |
|
683 |
} |
|
684 |
||
685 |
#[inline] |
|
14106 | 686 |
pub fn scaled_normal(&self) -> Point { |
14131 | 687 |
self.scaled_direction().rotate90() |
688 |
} |
|
689 |
||
690 |
#[inline] |
|
691 |
pub fn to_ray(&self) -> Ray { |
|
692 |
Ray::new(self.start, self.scaled_direction()) |
|
14106 | 693 |
} |
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
694 |
} |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
695 |
|
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
696 |
impl IntoIterator for Line { |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
697 |
type Item = Point; |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
698 |
type IntoIter = LinePoints; |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
699 |
|
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
700 |
fn into_iter(self) -> Self::IntoIter { |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
701 |
LinePoints::new(self) |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
702 |
} |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
703 |
} |
14051
8a0d69c16cad
Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents:
13950
diff
changeset
|
704 |
|
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
705 |
pub struct LinePoints { |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
706 |
accumulator: Point, |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
707 |
direction: Point, |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
708 |
sign: Point, |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
709 |
current: Point, |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
710 |
total_steps: i32, |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
711 |
step: i32, |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
712 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
713 |
|
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
714 |
impl LinePoints { |
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
715 |
pub fn new(line: Line) -> Self { |
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
716 |
let dir = line.end - line.start; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
717 |
|
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
718 |
Self { |
14627 | 719 |
accumulator: Point::ZERO, |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
720 |
direction: dir.abs(), |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
721 |
sign: dir.signum(), |
14076
e5904ead4864
Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents:
14059
diff
changeset
|
722 |
current: line.start, |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
723 |
total_steps: dir.max_norm(), |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
724 |
step: 0, |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
725 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
726 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
727 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
728 |
|
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
729 |
impl Iterator for LinePoints { |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
730 |
type Item = Point; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
731 |
|
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
732 |
fn next(&mut self) -> Option<Self::Item> { |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
733 |
if self.step <= self.total_steps { |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
734 |
self.accumulator += self.direction; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
735 |
|
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
736 |
if self.accumulator.x > self.total_steps { |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
737 |
self.accumulator.x -= self.total_steps; |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
738 |
self.current.x += self.sign.x; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
739 |
} |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
740 |
if self.accumulator.y > self.total_steps { |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
741 |
self.accumulator.y -= self.total_steps; |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
742 |
self.current.y += self.sign.y; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
743 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
744 |
|
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
745 |
self.step += 1; |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
746 |
|
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
747 |
Some(self.current) |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
748 |
} else { |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
749 |
None |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
750 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
751 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
752 |
} |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
753 |
|
13941 | 754 |
pub struct ArcPoints { |
755 |
point: Point, |
|
756 |
step: i32, |
|
757 |
} |
|
758 |
||
759 |
impl ArcPoints { |
|
14627 | 760 |
pub const fn new(radius: i32) -> Self { |
13941 | 761 |
Self { |
762 |
point: Point::new(0, radius), |
|
763 |
step: 3 - 2 * radius, |
|
764 |
} |
|
765 |
} |
|
766 |
} |
|
767 |
||
768 |
impl Iterator for ArcPoints { |
|
769 |
type Item = Point; |
|
770 |
||
771 |
fn next(&mut self) -> Option<Self::Item> { |
|
772 |
if self.point.x < self.point.y { |
|
773 |
let result = self.point; |
|
774 |
||
775 |
if self.step < 0 { |
|
776 |
self.step += self.point.x * 4 + 6; |
|
777 |
} else { |
|
778 |
self.step += (self.point.x - self.point.y) * 4 + 10; |
|
779 |
self.point.y -= 1; |
|
780 |
} |
|
781 |
||
782 |
self.point.x += 1; |
|
783 |
||
784 |
Some(result) |
|
785 |
} else if self.point.x == self.point.y { |
|
13947 | 786 |
self.point.x += 1; |
13950 | 787 |
|
13941 | 788 |
Some(self.point) |
789 |
} else { |
|
790 |
None |
|
791 |
} |
|
792 |
} |
|
793 |
} |
|
794 |
||
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
795 |
pub struct EquidistantPoints { |
15182 | 796 |
vector: Vec<Point>, |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
797 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
798 |
|
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
799 |
impl EquidistantPoints { |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
800 |
pub fn new(vector: Point) -> Self { |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
801 |
Self { |
15182 | 802 |
vector: if vector.x == vector.y { |
803 |
vec![ |
|
804 |
Point::new(vector.x, vector.x), |
|
805 |
Point::new(vector.x, -vector.x), |
|
806 |
Point::new(-vector.x, -vector.x), |
|
807 |
Point::new(-vector.x, vector.x), |
|
808 |
] |
|
809 |
} else { |
|
810 |
vec![ |
|
811 |
Point::new(vector.x, vector.y), |
|
812 |
Point::new(vector.x, -vector.y), |
|
813 |
Point::new(-vector.x, -vector.y), |
|
814 |
Point::new(-vector.x, vector.y), |
|
815 |
Point::new(vector.y, vector.x), |
|
816 |
Point::new(vector.y, -vector.x), |
|
817 |
Point::new(-vector.y, -vector.x), |
|
818 |
Point::new(-vector.y, vector.x), |
|
819 |
] |
|
820 |
}, |
|
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
821 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
822 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
823 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
824 |
|
15182 | 825 |
impl IntoIterator for EquidistantPoints { |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
826 |
type Item = Point; |
15182 | 827 |
type IntoIter = std::vec::IntoIter<Point>; |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
828 |
|
15182 | 829 |
fn into_iter(self) -> Self::IntoIter { |
830 |
self.vector.into_iter() |
|
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
831 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
832 |
} |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
833 |
|
14139 | 834 |
pub struct BezierCurveSegments { |
835 |
segment: Line, |
|
14146 | 836 |
control_point1: FPPoint, |
837 |
control_point2: FPPoint, |
|
14139 | 838 |
offset: FPNum, |
14140 | 839 |
max_offset: FPNum, |
14139 | 840 |
delta: FPNum, |
14140 | 841 |
have_finished: bool, |
14139 | 842 |
} |
843 |
||
844 |
impl BezierCurveSegments { |
|
14140 | 845 |
pub fn new(segment: Line, p1: FPPoint, p2: FPPoint, delta: FPNum) -> Self { |
14139 | 846 |
Self { |
847 |
segment, |
|
14146 | 848 |
control_point1: segment.start.to_fppoint() - p1, |
849 |
control_point2: segment.end.to_fppoint() - p2, |
|
14139 | 850 |
offset: fp!(0), |
14140 | 851 |
max_offset: fp!(4095 / 4096), |
14139 | 852 |
delta, |
14140 | 853 |
have_finished: false, |
14139 | 854 |
} |
855 |
} |
|
856 |
} |
|
857 |
||
858 |
impl Iterator for BezierCurveSegments { |
|
859 |
type Item = Point; |
|
860 |
||
861 |
fn next(&mut self) -> Option<Self::Item> { |
|
14140 | 862 |
if self.offset < self.max_offset { |
14139 | 863 |
let offset_sq = self.offset * self.offset; |
864 |
let offset_cub = offset_sq * self.offset; |
|
865 |
||
866 |
let r1 = fp!(1) - self.offset * 3 + offset_sq * 3 - offset_cub; |
|
867 |
let r2 = self.offset * 3 - offset_sq * 6 + offset_cub * 3; |
|
868 |
let r3 = offset_sq * 3 - offset_cub * 3; |
|
869 |
||
14146 | 870 |
let p = r1 * self.segment.start |
871 |
+ r2 * self.control_point1 |
|
872 |
+ r3 * self.control_point2 |
|
873 |
+ offset_cub * self.segment.end; |
|
14139 | 874 |
|
875 |
self.offset += self.delta; |
|
876 |
||
14146 | 877 |
Some(Point::from_fppoint(&p)) |
14140 | 878 |
} else if !self.have_finished { |
879 |
self.have_finished = true; |
|
880 |
||
881 |
Some(self.segment.end) |
|
14139 | 882 |
} else { |
883 |
None |
|
884 |
} |
|
885 |
} |
|
886 |
} |
|
887 |
||
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
888 |
#[cfg(test)] |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
889 |
mod tests { |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
890 |
use super::*; |
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
891 |
|
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
892 |
fn get_points(coords: &[(i32, i32)]) -> Vec<Point> { |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
893 |
coords.iter().map(|(x, y)| Point::new(*x, *y)).collect() |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
894 |
} |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
895 |
|
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
896 |
#[test] |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
897 |
fn line_basic() { |
14077 | 898 |
let line: Vec<Point> = Line::new(Point::new(0, 0), Point::new(3, 3)) |
899 |
.into_iter() |
|
900 |
.collect(); |
|
901 |
let v = get_points(&[(0, 0), (1, 1), (2, 2), (3, 3)]); |
|
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
902 |
|
14077 | 903 |
assert_eq!(line, v); |
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
904 |
} |
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
905 |
|
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
906 |
#[test] |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
907 |
fn line_skewed() { |
14077 | 908 |
let line: Vec<Point> = Line::new(Point::new(0, 0), Point::new(5, -7)) |
909 |
.into_iter() |
|
910 |
.collect(); |
|
13941 | 911 |
let v = get_points(&[ |
912 |
(0, 0), |
|
913 |
(1, -1), |
|
914 |
(2, -2), |
|
915 |
(2, -3), |
|
916 |
(3, -4), |
|
917 |
(4, -5), |
|
918 |
(4, -6), |
|
919 |
(5, -7), |
|
920 |
]); |
|
13938
1fa905aa4cdb
move point struct into integral-geometry and use it to refactor a bit
alfadur
parents:
13937
diff
changeset
|
921 |
|
14077 | 922 |
assert_eq!(line, v); |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
923 |
} |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
924 |
|
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
925 |
#[test] |
13943
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
926 |
fn equidistant_full() { |
15182 | 927 |
let n: Vec<Point> = EquidistantPoints::new(Point::new(1, 3)) |
928 |
.into_iter() |
|
929 |
.collect(); |
|
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
930 |
let v = get_points(&[ |
15182 | 931 |
(1, 3), |
932 |
(1, -3), |
|
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
933 |
(-1, -3), |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
934 |
(-1, 3), |
15182 | 935 |
(3, 1), |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
936 |
(3, -1), |
15182 | 937 |
(-3, -1), |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
938 |
(-3, 1), |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
939 |
]); |
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
940 |
|
14077 | 941 |
assert_eq!(n, v); |
13942
7e7a03e85ac4
Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents:
13941
diff
changeset
|
942 |
} |
13943
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
943 |
|
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
944 |
#[test] |
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
945 |
fn equidistant_half() { |
15182 | 946 |
let n: Vec<Point> = EquidistantPoints::new(Point::new(2, 2)) |
947 |
.into_iter() |
|
948 |
.collect(); |
|
949 |
let v = get_points(&[(2, 2), (2, -2), (-2, -2), (-2, 2)]); |
|
14077 | 950 |
|
951 |
assert_eq!(n, v); |
|
952 |
} |
|
13943
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
953 |
|
14077 | 954 |
#[test] |
955 |
fn line() { |
|
956 |
let l = Line::new(Point::new(1, 1), Point::new(5, 6)); |
|
957 |
||
958 |
assert_eq!(l.center(), Point::new(3, 3)); |
|
13943
a325ed57ebfe
Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents:
13942
diff
changeset
|
959 |
} |
14078 | 960 |
|
961 |
#[test] |
|
962 |
fn rect() { |
|
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
963 |
let r = Rect::from_box(10, 100, 0, 70); |
14078 | 964 |
|
14081 | 965 |
assert!(r.contains_inside(Point::new(99, 69))); |
966 |
assert!(!r.contains_inside(Point::new(100, 70))); |
|
967 |
||
14078 | 968 |
assert_eq!(r.top_left(), Point::new(10, 0)); |
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
969 |
assert_eq!(r.with_margin(12), Rect::from_box(22, 88, 12, 58)); |
14078 | 970 |
} |
14125 | 971 |
|
972 |
#[test] |
|
973 |
fn fit() { |
|
14137
3119d665d3c6
collapse rectangle types back together with consistent usage of size
alfadur
parents:
14135
diff
changeset
|
974 |
let r = Rect::from_box(10, 100, 0, 70); |
14125 | 975 |
|
14135
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
976 |
assert_eq!(Point::new(0, -10).clamp(&r), Point::new(10, 0)); |
7f5a591e1c43
separate rectangle types based on right/bottom edge inclusivity
alfadur
parents:
14134
diff
changeset
|
977 |
assert_eq!(Point::new(1000, 1000).clamp(&r), Point::new(100, 70)); |
14125 | 978 |
} |
13935
75eaf7c71789
Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff
changeset
|
979 |
} |