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optimized dot product

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This commit is contained in:
kai-z99 2024-05-29 19:30:55 -07:00
parent ba934b16c1
commit 6ad402a39d
1 changed files with 9 additions and 10 deletions
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19
src/rshapes.c
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@ -2317,11 +2317,6 @@ bool CheckCollisionPointLine(Vector2 point, Vector2 p1, Vector2 p2, int threshol
RLAPI bool CheckCollisionCircleLine(Vector2 center, float radius, Vector2 p1, Vector2 p2)
{
//test if end points are in circle
bool inside1 = CheckCollisionPointCircle(p1, center, radius);
bool inside2 = CheckCollisionPointCircle(p2, center, radius);
if (inside1 || inside2) return true;
// get length of line
float dx = p1.x - p2.x;
float dy = p1.y - p2.y;
@ -2330,16 +2325,20 @@ RLAPI bool CheckCollisionCircleLine(Vector2 center, float radius, Vector2 p1, Ve
// dot product
float dotProduct = (((center.x - p1.x) * (p2.x - p1.x)) + ((center.y - p1.y) * (p2.y - p1.y))) / (length_sqr);
if (dotProduct > 1.0f)
{
dotProduct = 1.0f;
}
else if (dotProduct < 0.0f)
{
dotProduct = 0.0f;
}
// closest point on line
float closeX = p1.x + (dotProduct * (p2.x - p1.x));
float closeY = p1.y + (dotProduct * (p2.y - p1.y));
Vector2 close = { closeX, closeY };
//is the point on the segment?
bool onSegment = CheckCollisionPointLine(close, p1, p2, 1);
if (!onSegment) return false;
//distnce from circle to closest point
dx = closeX - center.x;