herbglitch/archeus
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

collide and slide function for FRect

Browse source
This commit is contained in:
herbglitch 2023-06-26 01:27:30 -06:00
parent 5aede928d8
commit 56a4aa9d39
2 changed files with 43 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

27
src/math/rectangle.c
View file

@ -69,3 +69,30 @@ int32_t ARC_Rect_LineIntersects(ARC_Rect *rect, int32_t *x1, int32_t *y1, int32_
return 1;
}
//TODO: position 1px away from colliding, so if velocity is greater than 2px it doesn't have weird gap spacing
// might need to check diagnals as well, this is a rudamentry implementation
void ARC_FRect_CollideAndSlide(ARC_FRect *rect, ARC_Vector2 *velocity, ARC_FRect *wall){
ARC_FRect nextRectPosition = {
.x = rect->x + velocity->x,
.y = rect->y + velocity->y,
.w = rect->w,
.h = rect->h
};
//there is no collision, return
if(!ARC_FRect_Intersects(&nextRectPosition, wall)){
return;
}
nextRectPosition.x = rect->x + velocity->x;
nextRectPosition.y = rect->y;
if(ARC_FRect_Intersects(&nextRectPosition, wall)){
velocity->x = 0;
}
nextRectPosition.x = rect->x;
nextRectPosition.y = rect->y + velocity->y;
if(ARC_FRect_Intersects(&nextRectPosition, wall)){
velocity->y = 0;
}
}