Add const modifier to drawing API

src/raylib.h

@@ -1227,7 +1227,7 @@ RLAPI void DrawPixelV(Vector2 position, Color color);
 RLAPI void DrawLine(int startPosX, int startPosY, int endPosX, int endPosY, Color color);                // Draw a line
 RLAPI void DrawLineV(Vector2 startPos, Vector2 endPos, Color color);                                     // Draw a line (using gl lines)
 RLAPI void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color);                       // Draw a line (using triangles/quads)
-RLAPI void DrawLineStrip(Vector2 *points, int pointCount, Color color);                                  // Draw lines sequence (using gl lines)
+RLAPI void DrawLineStrip(const Vector2 *points, int pointCount, Color color);                                  // Draw lines sequence (using gl lines)
 RLAPI void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color);                   // Draw line segment cubic-bezier in-out interpolation
 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
@@ -1253,18 +1253,18 @@ RLAPI void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Co
 RLAPI void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, float lineThick, Color color); // Draw rectangle with rounded edges outline
 RLAPI void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                                // Draw a color-filled triangle (vertex in counter-clockwise order!)
 RLAPI void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                           // Draw triangle outline (vertex in counter-clockwise order!)
-RLAPI void DrawTriangleFan(Vector2 *points, int pointCount, Color color);                                // Draw a triangle fan defined by points (first vertex is the center)
+RLAPI void DrawTriangleFan(const Vector2 *points, int pointCount, Color color);                                // Draw a triangle fan defined by points (first vertex is the center)
-RLAPI void DrawTriangleStrip(Vector2 *points, int pointCount, Color color);                              // Draw a triangle strip defined by points
+RLAPI void DrawTriangleStrip(const Vector2 *points, int pointCount, Color color);                              // Draw a triangle strip defined by points
 RLAPI void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color color);               // Draw a regular polygon (Vector version)
 RLAPI void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Color color);          // Draw a polygon outline of n sides
 RLAPI void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, float lineThick, Color color); // Draw a polygon outline of n sides with extended parameters
 
 // Splines drawing functions
-RLAPI void DrawSplineLinear(Vector2 *points, int pointCount, float thick, Color color);                  // Draw spline: Linear, minimum 2 points
+RLAPI void DrawSplineLinear(const Vector2 *points, int pointCount, float thick, Color color);                  // Draw spline: Linear, minimum 2 points
-RLAPI void DrawSplineBasis(Vector2 *points, int pointCount, float thick, Color color);                   // Draw spline: B-Spline, minimum 4 points
+RLAPI void DrawSplineBasis(const Vector2 *points, int pointCount, float thick, Color color);                   // Draw spline: B-Spline, minimum 4 points
-RLAPI void DrawSplineCatmullRom(Vector2 *points, int pointCount, float thick, Color color);              // Draw spline: Catmull-Rom, minimum 4 points
+RLAPI void DrawSplineCatmullRom(const Vector2 *points, int pointCount, float thick, Color color);              // Draw spline: Catmull-Rom, minimum 4 points
-RLAPI void DrawSplineBezierQuadratic(Vector2 *points, int pointCount, float thick, Color color);         // Draw spline: Quadratic Bezier, minimum 3 points (1 control point): [p1, c2, p3, c4...]
+RLAPI void DrawSplineBezierQuadratic(const Vector2 *points, int pointCount, float thick, Color color);         // Draw spline: Quadratic Bezier, minimum 3 points (1 control point): [p1, c2, p3, c4...]
-RLAPI void DrawSplineBezierCubic(Vector2 *points, int pointCount, float thick, Color color);             // Draw spline: Cubic Bezier, minimum 4 points (2 control points): [p1, c2, c3, p4, c5, c6...]
+RLAPI void DrawSplineBezierCubic(const Vector2 *points, int pointCount, float thick, Color color);             // Draw spline: Cubic Bezier, minimum 4 points (2 control points): [p1, c2, c3, p4, c5, c6...]
 RLAPI void DrawSplineSegmentLinear(Vector2 p1, Vector2 p2, float thick, Color color);                    // Draw spline segment: Linear, 2 points
 RLAPI void DrawSplineSegmentBasis(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float thick, Color color); // Draw spline segment: B-Spline, 4 points
 RLAPI void DrawSplineSegmentCatmullRom(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float thick, Color color); // Draw spline segment: Catmull-Rom, 4 points
@@ -1285,7 +1285,7 @@ RLAPI bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec);
 RLAPI bool CheckCollisionPointRec(Vector2 point, Rectangle rec);                                         // Check if point is inside rectangle
 RLAPI bool CheckCollisionPointCircle(Vector2 point, Vector2 center, float radius);                       // Check if point is inside circle
 RLAPI bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2 p3);               // Check if point is inside a triangle
-RLAPI bool CheckCollisionPointPoly(Vector2 point, Vector2 *points, int pointCount);                      // Check if point is within a polygon described by array of vertices
+RLAPI bool CheckCollisionPointPoly(Vector2 point, const Vector2 *points, int pointCount);                      // Check if point is within a polygon described by array of vertices
 RLAPI bool CheckCollisionLines(Vector2 startPos1, Vector2 endPos1, Vector2 startPos2, Vector2 endPos2, Vector2 *collisionPoint); // Check the collision between two lines defined by two points each, returns collision point by reference
 RLAPI bool CheckCollisionPointLine(Vector2 point, Vector2 p1, Vector2 p2, int threshold);                // Check if point belongs to line created between two points [p1] and [p2] with defined margin in pixels [threshold]
 RLAPI Rectangle GetCollisionRec(Rectangle rec1, Rectangle rec2);                                         // Get collision rectangle for two rectangles collision
@@ -1491,7 +1491,7 @@ RLAPI void DrawLine3D(Vector3 startPos, Vector3 endPos, Color color);
 RLAPI void DrawPoint3D(Vector3 position, Color color);                                                   // Draw a point in 3D space, actually a small line
 RLAPI void DrawCircle3D(Vector3 center, float radius, Vector3 rotationAxis, float rotationAngle, Color color); // Draw a circle in 3D world space
 RLAPI void DrawTriangle3D(Vector3 v1, Vector3 v2, Vector3 v3, Color color);                              // Draw a color-filled triangle (vertex in counter-clockwise order!)
-RLAPI void DrawTriangleStrip3D(Vector3 *points, int pointCount, Color color);                            // Draw a triangle strip defined by points
+RLAPI void DrawTriangleStrip3D(const Vector3 *points, int pointCount, Color color);                            // Draw a triangle strip defined by points
 RLAPI void DrawCube(Vector3 position, float width, float height, float length, Color color);             // Draw cube
 RLAPI void DrawCubeV(Vector3 position, Vector3 size, Color color);                                       // Draw cube (Vector version)
 RLAPI void DrawCubeWires(Vector3 position, float width, float height, float length, Color color);        // Draw cube wires

src/rmodels.c

@@ -226,7 +226,7 @@ void DrawTriangle3D(Vector3 v1, Vector3 v2, Vector3 v3, Color color)
 }
 
 // Draw a triangle strip defined by points
-void DrawTriangleStrip3D(Vector3 *points, int pointCount, Color color)
+void DrawTriangleStrip3D(const Vector3 *points, int pointCount, Color color)
 {
     if (pointCount < 3) return;
 

src/rshapes.c

@@ -182,7 +182,7 @@ void DrawLineV(Vector2 startPos, Vector2 endPos, Color color)
 }
 
 // Draw lines sequuence (using gl lines)
-void DrawLineStrip(Vector2 *points, int pointCount, Color color)
+void DrawLineStrip(const Vector2 *points, int pointCount, Color color)
 {
     if (pointCount >= 2)
     {
@@ -1363,7 +1363,7 @@ void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
 // Draw a triangle fan defined by points
 // NOTE: First vertex provided is the center, shared by all triangles
 // By default, following vertex should be provided in counter-clockwise order
-void DrawTriangleFan(Vector2 *points, int pointCount, Color color)
+void DrawTriangleFan(const Vector2 *points, int pointCount, Color color)
 {
     if (pointCount >= 3)
     {
@@ -1392,7 +1392,7 @@ void DrawTriangleFan(Vector2 *points, int pointCount, Color color)
 
 // Draw a triangle strip defined by points
 // NOTE: Every new vertex connects with previous two
-void DrawTriangleStrip(Vector2 *points, int pointCount, Color color)
+void DrawTriangleStrip(const Vector2 *points, int pointCount, Color color)
 {
     if (pointCount >= 3)
     {
@@ -1544,7 +1544,7 @@ void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, fl
 //----------------------------------------------------------------------------------
 
 // Draw spline: linear, minimum 2 points
-void DrawSplineLinear(Vector2 *points, int pointCount, float thick, Color color)
+void DrawSplineLinear(const Vector2 *points, int pointCount, float thick, Color color)
 {
     if (pointCount < 2) return;
 
@@ -1661,7 +1661,7 @@ void DrawSplineLinear(Vector2 *points, int pointCount, float thick, Color color)
 }
 
 // Draw spline: B-Spline, minimum 4 points
-void DrawSplineBasis(Vector2 *points, int pointCount, float thick, Color color)
+void DrawSplineBasis(const Vector2 *points, int pointCount, float thick, Color color)
 {
     if (pointCount < 4) return;
 
@@ -1737,7 +1737,7 @@ void DrawSplineBasis(Vector2 *points, int pointCount, float thick, Color color)
 }
 
 // Draw spline: Catmull-Rom, minimum 4 points
-void DrawSplineCatmullRom(Vector2 *points, int pointCount, float thick, Color color)
+void DrawSplineCatmullRom(const Vector2 *points, int pointCount, float thick, Color color)
 {
     if (pointCount < 4) return;
 
@@ -1803,7 +1803,7 @@ void DrawSplineCatmullRom(Vector2 *points, int pointCount, float thick, Color co
 }
 
 // Draw spline: Quadratic Bezier, minimum 3 points (1 control point): [p1, c2, p3, c4...]
-void DrawSplineBezierQuadratic(Vector2 *points, int pointCount, float thick, Color color)
+void DrawSplineBezierQuadratic(const Vector2 *points, int pointCount, float thick, Color color)
 {
     if (pointCount < 3) return;
 
@@ -1814,7 +1814,7 @@ void DrawSplineBezierQuadratic(Vector2 *points, int pointCount, float thick, Col
 }
 
 // Draw spline: Cubic Bezier, minimum 4 points (2 control points): [p1, c2, c3, p4, c5, c6...]
-void DrawSplineBezierCubic(Vector2 *points, int pointCount, float thick, Color color)
+void DrawSplineBezierCubic(const Vector2 *points, int pointCount, float thick, Color color)
 {
     if (pointCount < 4) return;
 
@@ -2169,7 +2169,7 @@ bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2
 
 // Check if point is within a polygon described by array of vertices
 // NOTE: Based on http://jeffreythompson.org/collision-detection/poly-point.php
-bool CheckCollisionPointPoly(Vector2 point, Vector2 *points, int pointCount)
+bool CheckCollisionPointPoly(Vector2 point, const Vector2 *points, int pointCount)
 {
     bool collision = false;