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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
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2 changed files with 27 additions and 0 deletions
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1
src/raylib.h
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@ -1148,6 +1148,7 @@ RLAPI void DrawLineV(Vector2 startPos, Vector2 endPos, Color color);
RLAPI void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color); // Draw a line defining thickness
RLAPI void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color); // Draw a line using cubic-bezier curves in-out
RLAPI void DrawLineBezierQuad(Vector2 startPos, Vector2 endPos, Vector2 controlPos, float thick, Color color); //Draw line using quadratic bezier curves with a control point
RLAPI void DrawLineBezierCubic(Vector2 startPos, Vector2 endPos, Vector2 startControlPos, Vector2 endControlPos, float thick, Color color) //Draw line using cubic bezier curves with 2 control points
RLAPI void DrawLineStrip(Vector2 *points, int pointCount, Color color); // Draw lines sequence
RLAPI void DrawCircle(int centerX, int centerY, float radius, Color color); // Draw a color-filled circle
RLAPI void DrawCircleSector(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color); // Draw a piece of a circle

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)
{