color fixes

src/main/java/com/marginallyclever/makelangelo/apps/previewpanel/turtlerenderer/DirectionLoopTurtleRenderer.java

@@ -59,8 +59,8 @@ private void drawPoints() {
 				TurtleMove p1 = points.get(i+1);
 				float b0 = (float)i/(float)size;
 				float b1 = (float)(i+1)/(float)size;
-				var c0 = new Color(b0,0,1.0f - b0,1);
-				var c1 = new Color(b1,0,1.0f - b1,1);
+				var c0 = new Color(b0,0,(int)(255f*(1.0f - b0)),255);
+				var c1 = new Color(b1,0,(int)(255f*(1.0f - b1)),255);
 				Vector3d p0v = new Vector3d(p0.x,p0.y,0);
 				Vector3d p1v = new Vector3d(p1.x,p1.y,0);
 				Line2QuadHelper.thicken(mesh, p0v, p1v, c0, c1, penDiameter);

src/main/java/com/marginallyclever/makelangelo/apps/previewpanel/turtlerenderer/Line2QuadHelper.java

@@ -43,10 +43,10 @@ public static void thicken(Mesh mesh, Vector3d p0, Vector3d p1, Color c0, Color
         float b0 = c0.getBlue() / 255.0f;
         float a0 = c0.getAlpha() / 255.0f;
 
-        float r1 = c0.getRed() / 255.0f;
-        float g1 = c0.getGreen() / 255.0f;
-        float b1 = c0.getBlue() / 255.0f;
-        float a1 = c0.getAlpha() / 255.0f;
+        float r1 = c1.getRed() / 255.0f;
+        float g1 = c1.getGreen() / 255.0f;
+        float b1 = c1.getBlue() / 255.0f;
+        float a1 = c1.getAlpha() / 255.0f;
 
         // d is the line p0->p1 scaled to thickness/2
         Vector2d d = new Vector2d(p1.x-p0.x,p1.y-p0.y);
@@ -74,14 +74,12 @@ public static void thicken(Mesh mesh, Vector3d p0, Vector3d p1, Color c0, Color
             mesh.addTexCoord((float)p1.x, (float)p1.y);
         }
 
-
         mesh.addColor(r0, g0, b0, a0);
         mesh.addColor(r1, g1, b1, a1);
-        mesh.addColor(r0, g0, b0, a0);
-
         mesh.addColor(r1, g1, b1, a1);
+
         mesh.addColor(r1, g1, b1, a1);
         mesh.addColor(r0, g0, b0, a0);
-
+        mesh.addColor(r0, g0, b0, a0);
     }
 }