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Added DrawLineBezierCubic() (#2021)

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Co-authored-by: SAOMDVN <saomdvn@users.noreply.github.com>
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SAOMDVN
2021-10-03 17:15:56 +07:00
committed by GitHub
parent 03a88678da
commit 3fc4a4c974
2 changed files with 27 additions and 0 deletions
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26
src/rshapes.c
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@@ -189,6 +189,32 @@ void DrawLineBezierQuad(Vector2 startPos, Vector2 endPos, Vector2 controlPos, fl
}
}
//Draw line using cubic bezier curves with 2 control points
void DrawLineBezierCubic(Vector2 startPos, Vector2 endPos, Vector2 startControlPos, Vector2 endControlPos, float thick, Color color)
{
const float step = 1.0f/BEZIER_LINE_DIVISIONS;
Vector2 previous = startPos;
Vector2 current = { 0 };
float t = 0.0f;
for (int i = 0; i <= BEZIER_LINE_DIVISIONS; i++)
{
t = step*i;
float a = powf(1 - t, 3);
float b = 3*powf(1 - t, 2)*t;
float c = 3*(1-t)*powf(t, 2);
float d = powf(t, 3);
current.y = a*startPos.y + b*startControlPos.y + c*endControlPos.y + d*endPos.y;
current.x = a*startPos.x + b*startControlPos.x + c*endControlPos.x + d*endPos.x;
DrawLineEx(previous, current, thick, color);
previous = current;
}
}
// Draw lines sequence
void DrawLineStrip(Vector2 *points, int pointCount, Color color)
{