Placefile polygon rendering

scwx-qt/gl/map_color.vert

@@ -0,0 +1,23 @@
+#version 330 core
+
+layout (location = 0) in vec2 aScreenCoord;
+layout (location = 1) in vec2 aXYOffset;
+layout (location = 2) in vec4 aColor;
+
+uniform mat4 uMVPMatrix;
+uniform mat4 uMapMatrix;
+uniform vec2 uMapScreenCoord;
+
+out vec4 color;
+
+void main()
+{
+   // Pass the color to the fragment shader
+   color = aColor;
+
+   vec2 p = aScreenCoord - uMapScreenCoord;
+
+   // Transform the position to screen coordinates
+   gl_Position = uMapMatrix * vec4(p, 0.0f, 1.0f) +
+                 uMVPMatrix * vec4(aXYOffset, 0.0f, 0.0f);
+}