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This commit is contained in:
Declan Grant
2025-10-05 16:05:57 +01:00
parent c8dfcd857e
commit 628a6c5ade
4 changed files with 64 additions and 39 deletions
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15
code/game/impl/aabb.c
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@@ -1,5 +1,5 @@
#include "game/aabb.h"
#include "core/types.h"
#include <math.h>
bool AABB_Collide(AABB a, AABB b)
{
@@ -19,17 +19,18 @@ bool AABB_Slab(V2f origin, V2f point, AABB a)
{
V2f start = a.pos;
V2f finish = {a.pos.x + a.size.x, a.pos.y + a.size.y};
V2f direction = {origin.x - point.x, origin.y - point.y};
V2f invdirection = {1 / (origin.x - point.x), 1 / (origin.y - point.y)};
// x
F32 tLow = (start.x - origin.x) / direction.x;
F32 tHigh = (finish.x - origin.x) / direction.x;
F32 tLow = (start.x - origin.x) * invdirection.x;
F32 tHigh = (finish.x - origin.x) * invdirection.x;
F32 tMin = min(tLow, tHigh);
F32 tMax = max(tLow, tHigh);
// y
tLow = (start.x - origin.x) / direction.x;
tHigh = (finish.x - origin.x) / direction.x;
tLow = (start.y - origin.y) * invdirection.y;
tHigh = (finish.y - origin.y) * invdirection.y;
tMin = max(tMin, min(tLow, tHigh));
tMax = min(tMax, max(tLow, tHigh));
return tMax >= max(0.0, tMin);
return tMax >= tMin;
}