author | nemo |
Sat, 27 Mar 2010 05:15:52 +0000 | |
changeset 3098 | e5a1bc4e56fd |
parent 3038 | 4e48c276a468 |
child 3236 | 4ab3917d7d44 |
permissions | -rw-r--r-- |
4 | 1 |
(* |
1066 | 2 |
* Hedgewars, a free turn based strategy game |
883 | 3 |
* Copyright (c) 2005-2008 Andrey Korotaev <unC0Rr@gmail.com> |
4 | 4 |
* |
183 | 5 |
* This program is free software; you can redistribute it and/or modify |
6 |
* it under the terms of the GNU General Public License as published by |
|
7 |
* the Free Software Foundation; version 2 of the License |
|
4 | 8 |
* |
183 | 9 |
* This program is distributed in the hope that it will be useful, |
10 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
11 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
12 |
* GNU General Public License for more details. |
|
4 | 13 |
* |
183 | 14 |
* You should have received a copy of the GNU General Public License |
15 |
* along with this program; if not, write to the Free Software |
|
16 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
|
4 | 17 |
*) |
18 |
||
2630 | 19 |
{$INCLUDE "options.inc"} |
20 |
||
4 | 21 |
unit uCollisions; |
22 |
interface |
|
351 | 23 |
uses uGears, uFloat; |
2630 | 24 |
|
53 | 25 |
const cMaxGearArrayInd = 255; |
4 | 26 |
|
70 | 27 |
type PGearArray = ^TGearArray; |
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TGearArray = record |
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ar: array[0..cMaxGearArrayInd] of PGear; |
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30 |
Count: Longword |
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31 |
end; |
4 | 32 |
|
3038 | 33 |
procedure initModule; |
34 |
procedure freeModule; |
|
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35 |
|
53 | 36 |
procedure AddGearCI(Gear: PGear); |
37 |
procedure DeleteCI(Gear: PGear); |
|
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38 |
|
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39 |
function CheckGearsCollision(Gear: PGear): PGearArray; |
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40 |
|
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function TestCollisionXwithGear(Gear: PGear; Dir: LongInt): boolean; |
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function TestCollisionYwithGear(Gear: PGear; Dir: LongInt): boolean; |
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43 |
|
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function TestCollisionXKick(Gear: PGear; Dir: LongInt): boolean; |
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function TestCollisionYKick(Gear: PGear; Dir: LongInt): boolean; |
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46 |
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function TestCollisionY(Gear: PGear; Dir: LongInt): boolean; |
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function TestCollisionXwithXYShift(Gear: PGear; ShiftX: hwFloat; ShiftY: LongInt; Dir: LongInt): boolean; |
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50 |
function TestCollisionYwithXYShift(Gear: PGear; ShiftX, ShiftY: LongInt; Dir: LongInt): boolean; |
4 | 51 |
|
52 |
implementation |
|
511 | 53 |
uses uMisc, uConsts, uLand, uLandGraphics, uConsole; |
4 | 54 |
|
53 | 55 |
type TCollisionEntry = record |
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X, Y, Radius: LongInt; |
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57 |
cGear: PGear; |
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58 |
end; |
351 | 59 |
|
906 | 60 |
const MAXRECTSINDEX = 511; |
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61 |
var Count: Longword; |
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62 |
cinfos: array[0..MAXRECTSINDEX] of TCollisionEntry; |
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63 |
ga: TGearArray; |
4 | 64 |
|
53 | 65 |
procedure AddGearCI(Gear: PGear); |
66 |
begin |
|
511 | 67 |
if Gear^.CollisionIndex >= 0 then exit; |
4 | 68 |
TryDo(Count <= MAXRECTSINDEX, 'Collision rects array overflow', true); |
53 | 69 |
with cinfos[Count] do |
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70 |
begin |
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71 |
X:= hwRound(Gear^.X); |
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Y:= hwRound(Gear^.Y); |
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73 |
Radius:= Gear^.Radius; |
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74 |
ChangeRoundInLand(X, Y, Radius - 1, true); |
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75 |
cGear:= Gear |
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76 |
end; |
511 | 77 |
Gear^.CollisionIndex:= Count; |
4 | 78 |
inc(Count) |
79 |
end; |
|
80 |
||
53 | 81 |
procedure DeleteCI(Gear: PGear); |
4 | 82 |
begin |
511 | 83 |
if Gear^.CollisionIndex >= 0 then |
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begin |
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with cinfos[Gear^.CollisionIndex] do |
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86 |
ChangeRoundInLand(X, Y, Radius - 1, false); |
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cinfos[Gear^.CollisionIndex]:= cinfos[Pred(Count)]; |
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cinfos[Gear^.CollisionIndex].cGear^.CollisionIndex:= Gear^.CollisionIndex; |
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Gear^.CollisionIndex:= -1; |
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90 |
dec(Count) |
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91 |
end; |
4 | 92 |
end; |
93 |
||
53 | 94 |
function CheckGearsCollision(Gear: PGear): PGearArray; |
371 | 95 |
var mx, my: LongInt; |
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96 |
i: Longword; |
4 | 97 |
begin |
1506 | 98 |
CheckGearsCollision:= @ga; |
53 | 99 |
ga.Count:= 0; |
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100 |
if Count = 0 then exit; |
351 | 101 |
mx:= hwRound(Gear^.X); |
102 |
my:= hwRound(Gear^.Y); |
|
4 | 103 |
|
104 |
for i:= 0 to Pred(Count) do |
|
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with cinfos[i] do |
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106 |
if (Gear <> cGear) and |
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(sqr(mx - x) + sqr(my - y) <= sqr(Radius + Gear^.Radius)) then |
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108 |
begin |
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ga.ar[ga.Count]:= cinfos[i].cGear; |
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inc(ga.Count) |
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111 |
end |
4 | 112 |
end; |
113 |
||
371 | 114 |
function TestCollisionXwithGear(Gear: PGear; Dir: LongInt): boolean; |
115 |
var x, y, i: LongInt; |
|
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TestWord: LongWord; |
4 | 117 |
begin |
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if Gear^.IntersectGear <> nil then |
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with Gear^ do |
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if (hwRound(IntersectGear^.X) + IntersectGear^.Radius < hwRound(X) - Radius) or |
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(hwRound(IntersectGear^.X) - IntersectGear^.Radius > hwRound(X) + Radius) then |
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122 |
begin |
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123 |
IntersectGear:= nil; |
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124 |
TestWord:= 0 |
838 | 125 |
end else |
1966 | 126 |
TestWord:= 255 |
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127 |
else TestWord:= 0; |
838 | 128 |
|
351 | 129 |
x:= hwRound(Gear^.X); |
130 |
if Dir < 0 then x:= x - Gear^.Radius |
|
131 |
else x:= x + Gear^.Radius; |
|
1753 | 132 |
if (x and LAND_WIDTH_MASK) = 0 then |
4 | 133 |
begin |
351 | 134 |
y:= hwRound(Gear^.Y) - Gear^.Radius + 1; |
135 |
i:= y + Gear^.Radius * 2 - 2; |
|
4 | 136 |
repeat |
1753 | 137 |
if (y and LAND_HEIGHT_MASK) = 0 then |
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138 |
if Land[y, x] > TestWord then exit(true); |
4 | 139 |
inc(y) |
351 | 140 |
until (y > i); |
141 |
end; |
|
142 |
TestCollisionXwithGear:= false |
|
4 | 143 |
end; |
144 |
||
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145 |
function TestCollisionYwithGear(Gear: PGear; Dir: LongInt): boolean; |
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var x, y, i: LongInt; |
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TestWord: LongWord; |
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148 |
begin |
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149 |
if Gear^.IntersectGear <> nil then |
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150 |
with Gear^ do |
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151 |
if (hwRound(IntersectGear^.Y) + IntersectGear^.Radius < hwRound(Y) - Radius) or |
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152 |
(hwRound(IntersectGear^.Y) - IntersectGear^.Radius > hwRound(Y) + Radius) then |
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153 |
begin |
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154 |
IntersectGear:= nil; |
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155 |
TestWord:= 0 |
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156 |
end else |
1966 | 157 |
TestWord:= 255 |
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158 |
else TestWord:= 0; |
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159 |
|
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160 |
y:= hwRound(Gear^.Y); |
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161 |
if Dir < 0 then y:= y - Gear^.Radius |
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162 |
else y:= y + Gear^.Radius; |
1753 | 163 |
if (y and LAND_HEIGHT_MASK) = 0 then |
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164 |
begin |
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165 |
x:= hwRound(Gear^.X) - Gear^.Radius + 1; |
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166 |
i:= x + Gear^.Radius * 2 - 2; |
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167 |
repeat |
1753 | 168 |
if (x and LAND_WIDTH_MASK) = 0 then |
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169 |
if Land[y, x] > TestWord then exit(true); |
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170 |
inc(x) |
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171 |
until (x > i); |
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172 |
end; |
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173 |
TestCollisionYwithGear:= false |
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174 |
end; |
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175 |
|
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176 |
function TestCollisionXKick(Gear: PGear; Dir: LongInt): boolean; |
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177 |
var x, y, mx, my, i: LongInt; |
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|
178 |
flag: boolean; |
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|
179 |
begin |
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|
180 |
flag:= false; |
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|
181 |
x:= hwRound(Gear^.X); |
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|
182 |
if Dir < 0 then x:= x - Gear^.Radius |
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|
183 |
else x:= x + Gear^.Radius; |
1753 | 184 |
if (x and LAND_WIDTH_MASK) = 0 then |
513
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|
185 |
begin |
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|
186 |
y:= hwRound(Gear^.Y) - Gear^.Radius + 1; |
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|
187 |
i:= y + Gear^.Radius * 2 - 2; |
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|
188 |
repeat |
1753 | 189 |
if (y and LAND_HEIGHT_MASK) = 0 then |
1966 | 190 |
if Land[y, x] > 255 then exit(true) |
536 | 191 |
else if Land[y, x] <> 0 then flag:= true; |
513
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inc(y) |
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until (y > i); |
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194 |
end; |
538 | 195 |
TestCollisionXKick:= flag; |
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196 |
|
536 | 197 |
if flag then |
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198 |
begin |
538 | 199 |
if hwAbs(Gear^.dX) < cHHKick then exit; |
967 | 200 |
if (Gear^.State and gstHHJumping <> 0) |
201 |
and (hwAbs(Gear^.dX) < _0_4) then exit; |
|
202 |
||
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mx:= hwRound(Gear^.X); |
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my:= hwRound(Gear^.Y); |
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|
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for i:= 0 to Pred(Count) do |
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with cinfos[i] do |
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if (Gear <> cGear) and |
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(sqr(mx - x) + sqr(my - y) <= sqr(Radius + Gear^.Radius + 2)) and |
517 | 210 |
((mx > x) xor (Dir > 0)) then |
1528 | 211 |
if (cGear^.Kind in [gtHedgehog, gtMine]) and ((Gear^.State and gstNotKickable) = 0) then |
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begin |
521 | 213 |
with cGear^ do |
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begin |
536 | 215 |
dX:= Gear^.dX; |
542 | 216 |
dY:= Gear^.dY * _0_5; |
521 | 217 |
State:= State or gstMoving; |
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Active:= true |
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219 |
end; |
521 | 220 |
DeleteCI(cGear); |
538 | 221 |
exit(false) |
222 |
end |
|
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223 |
end |
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224 |
end; |
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225 |
|
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function TestCollisionYKick(Gear: PGear; Dir: LongInt): boolean; |
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var x, y, mx, my, i: LongInt; |
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flag: boolean; |
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begin |
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flag:= false; |
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231 |
y:= hwRound(Gear^.Y); |
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232 |
if Dir < 0 then y:= y - Gear^.Radius |
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233 |
else y:= y + Gear^.Radius; |
1753 | 234 |
if (y and LAND_HEIGHT_MASK) = 0 then |
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begin |
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x:= hwRound(Gear^.X) - Gear^.Radius + 1; |
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i:= x + Gear^.Radius * 2 - 2; |
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238 |
repeat |
1753 | 239 |
if (x and LAND_WIDTH_MASK) = 0 then |
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240 |
if Land[y, x] > 0 then |
1966 | 241 |
if Land[y, x] > 255 then exit(true) |
536 | 242 |
else if Land[y, x] <> 0 then flag:= true; |
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243 |
inc(x) |
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244 |
until (x > i); |
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245 |
end; |
538 | 246 |
TestCollisionYKick:= flag; |
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247 |
|
536 | 248 |
if flag then |
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249 |
begin |
839 | 250 |
if hwAbs(Gear^.dY) < cHHKick then exit(true); |
967 | 251 |
if (Gear^.State and gstHHJumping <> 0) |
252 |
and (not Gear^.dY.isNegative) |
|
253 |
and (Gear^.dY < _0_4) then exit; |
|
254 |
||
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255 |
mx:= hwRound(Gear^.X); |
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256 |
my:= hwRound(Gear^.Y); |
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257 |
|
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258 |
for i:= 0 to Pred(Count) do |
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259 |
with cinfos[i] do |
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260 |
if (Gear <> cGear) and |
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(sqr(mx - x) + sqr(my - y) <= sqr(Radius + Gear^.Radius + 2)) and |
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262 |
((my > y) xor (Dir > 0)) then |
1528 | 263 |
if (cGear^.Kind in [gtHedgehog, gtMine]) and ((Gear^.State and gstNotKickable) = 0) then |
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264 |
begin |
521 | 265 |
with cGear^ do |
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266 |
begin |
542 | 267 |
dX:= Gear^.dX * _0_5; |
268 |
dY:= Gear^.dY; |
|
521 | 269 |
State:= State or gstMoving; |
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270 |
Active:= true |
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271 |
end; |
521 | 272 |
DeleteCI(cGear); |
538 | 273 |
exit(false) |
274 |
end |
|
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275 |
end |
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276 |
end; |
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277 |
|
498 | 278 |
function TestCollisionXwithXYShift(Gear: PGear; ShiftX: hwFloat; ShiftY: LongInt; Dir: LongInt): boolean; |
4 | 279 |
begin |
351 | 280 |
Gear^.X:= Gear^.X + ShiftX; |
498 | 281 |
Gear^.Y:= Gear^.Y + int2hwFloat(ShiftY); |
351 | 282 |
TestCollisionXwithXYShift:= TestCollisionXwithGear(Gear, Dir); |
283 |
Gear^.X:= Gear^.X - ShiftX; |
|
498 | 284 |
Gear^.Y:= Gear^.Y - int2hwFloat(ShiftY) |
4 | 285 |
end; |
286 |
||
371 | 287 |
function TestCollisionY(Gear: PGear; Dir: LongInt): boolean; |
288 |
var x, y, i: LongInt; |
|
68 | 289 |
begin |
351 | 290 |
y:= hwRound(Gear^.Y); |
291 |
if Dir < 0 then y:= y - Gear^.Radius |
|
292 |
else y:= y + Gear^.Radius; |
|
1753 | 293 |
if (y and LAND_HEIGHT_MASK) = 0 then |
68 | 294 |
begin |
351 | 295 |
x:= hwRound(Gear^.X) - Gear^.Radius + 1; |
296 |
i:= x + Gear^.Radius * 2 - 2; |
|
68 | 297 |
repeat |
1753 | 298 |
if (x and LAND_WIDTH_MASK) = 0 then |
1966 | 299 |
if Land[y, x] > 255 then exit(true); |
68 | 300 |
inc(x) |
351 | 301 |
until (x > i); |
302 |
end; |
|
303 |
TestCollisionY:= false |
|
68 | 304 |
end; |
305 |
||
371 | 306 |
function TestCollisionYwithXYShift(Gear: PGear; ShiftX, ShiftY: LongInt; Dir: LongInt): boolean; |
4 | 307 |
begin |
498 | 308 |
Gear^.X:= Gear^.X + int2hwFloat(ShiftX); |
309 |
Gear^.Y:= Gear^.Y + int2hwFloat(ShiftY); |
|
351 | 310 |
TestCollisionYwithXYShift:= TestCollisionYwithGear(Gear, Dir); |
498 | 311 |
Gear^.X:= Gear^.X - int2hwFloat(ShiftX); |
312 |
Gear^.Y:= Gear^.Y - int2hwFloat(ShiftY) |
|
4 | 313 |
end; |
314 |
||
3038 | 315 |
procedure initModule; |
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316 |
begin |
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317 |
Count:= 0; |
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318 |
end; |
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319 |
|
3038 | 320 |
procedure freeModule; |
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321 |
begin |
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322 |
|
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323 |
end; |
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324 |
|
4 | 325 |
end. |