Add Quadratic Bezier drawing (#1468)

* Add quadratic bezier to shapes.c

* Add DrawLineBezierQuad to header

1 files changed, 23 insertions, 1 deletions

diff --git a/src/shapes.c b/src/shapes.c
index 56de3a7a..829d54cb 100644
--- a/src/shapes.c
+++ b/src/shapes.c
@@ -179,7 +179,29 @@ void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color)
         previous = current;
     }
 }
-
+// Draw line using quadratic bezier curves with a control point
+void DrawLineBezierQuad(Vector2 startPos, Vector2 controlPos, Vector2 endPos,float thick,Color color)
+{
+    Vector2 previous = startPos;
+    Vector2 current;
+    float t=0;
+    const float step = 1.0f/BEZIER_LINE_DIVISIONS;
+    for (int i = 0; i <= BEZIER_LINE_DIVISIONS; i++)
+    {
+        t=step*i;
+        float a = powf(1-t,2);
+        float b = 2*(1-t)*t;
+        float c = powf(t,2);
+        //The easing functions aren't suitable here because they don't take a control point
+        current.y=a*startPos.y+b*controlPos.y+c*endPos.y;
+        current.x=a*startPos.x+b*controlPos.x+c*endPos.x;
+        
+        DrawLineEx(previous,current,thick,color);
+        
+        previous=current;
+        
+    }
+}
 // Draw lines sequence
 void DrawLineStrip(Vector2 *points, int pointsCount, Color color)
 {