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14725
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use integral_geometry::{Point, Rect, Size};
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#[derive(Debug)]
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pub struct Camera {
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pub position: Point,
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pub zoom: f32,
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size: Size,
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}
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impl Camera {
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pub fn new() -> Self {
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Self::with_size(Size::new(1024, 768))
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}
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pub fn with_size(size: Size) -> Self {
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Self {
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position: Point::ZERO,
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zoom: 1.0,
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size,
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}
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}
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pub fn viewport(&self) -> Rect {
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14730
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#[inline]
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fn scale(value: usize, zoom: f32) -> i32 {
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(value as f32 / zoom / 2.0) as i32
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}
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let half_width = scale(self.size.width, self.zoom);
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let half_height = scale(self.size.height, self.zoom);
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Rect::from_box(
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self.position.x - half_width,
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self.position.x + half_width,
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self.position.y - half_height,
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self.position.y + half_height,
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)
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}
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}
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