36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
#include "game/aabb.h"
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#include <math.h>
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bool AABB_Collide(AABB a, AABB b)
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{
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bool collision_x = a.pos.x + a.size.x >= b.pos.x && b.pos.x + b.size.x >= a.pos.x;
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bool collision_y = a.pos.y + a.size.x >= b.pos.y && b.pos.y + b.size.y >= a.pos.y;
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return collision_x && collision_y;
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}
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bool AABB_Point(AABB a, V2f v)
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{
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bool collision_x = a.pos.x + a.size.x >= v.x && a.pos.x <= v.x;
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bool collision_y = a.pos.x + a.size.y >= v.y && a.pos.y <= v.y;
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return collision_x && collision_y;
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}
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bool AABB_Slab(V2f origin, V2f point, AABB a)
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{
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V2f start = a.pos;
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V2f finish = {a.pos.x + a.size.x, a.pos.y + a.size.y};
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V2f invdirection = {1 / (origin.x - point.x), 1 / (origin.y - point.y)};
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// x
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F32 tLow = (start.x - origin.x) * invdirection.x;
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F32 tHigh = (finish.x - origin.x) * invdirection.x;
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F32 tMin = min(tLow, tHigh);
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F32 tMax = max(tLow, tHigh);
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// y
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tLow = (start.y - origin.y) * invdirection.y;
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tHigh = (finish.y - origin.y) * invdirection.y;
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tMin = max(tMin, min(tLow, tHigh));
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tMax = min(tMax, max(tLow, tHigh));
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return tMax >= tMin;
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} |