Circle map style: use GL quads or GL points #122

vtm/resources/assets/shaders/circle_quad.glsl

@@ -0,0 +1,22 @@
+#ifdef GLES
+precision highp float;
+#endif
+uniform mat4 u_mvp;
+attribute vec2 a_pos;
+varying vec2 v_pos;
+void main() {
+    gl_Position = u_mvp * vec4(a_pos, 0.0, 1.0);
+    v_pos = a_pos;
+}
+
+$$
+
+#ifdef GLES
+precision highp float;
+#endif
+uniform vec4 u_color;
+uniform float u_scale;
+varying vec2 v_pos;
+void main() {
+    gl_FragColor = u_color;
+}