improve point rendering in wireframe debug mode

Author: bcamper

src/styles/points/points.js

@@ -96,6 +96,11 @@ Object.assign(Points, {
         if (debugSettings.show_hidden_labels === true) {
             this.defines.TANGRAM_SHOW_HIDDEN_LABELS = true;
         }
+
+        // Enable wireframe for debugging
+        if (debugSettings.wireframe === true) {
+            this.defines.TANGRAM_WIREFRAME = true;
+        }
     },
 
     reset () {

src/styles/points/points_fragment.glsl

@@ -109,5 +109,15 @@ void main (void) {
         }
     #endif
 
+    // Make points more visible in wireframe debug mode
+    #ifdef TANGRAM_WIREFRAME
+        color = vec4(vec3(0.5), 1.); // use gray outline for textured points
+        #ifdef TANGRAM_HAS_SHADER_POINTS
+            if (u_point_type == TANGRAM_POINT_TYPE_SHADER) {
+                color = vec4(v_color.rgb, 1.); // use original vertex color outline for shader points
+            }
+        #endif
+    #endif
+
     gl_FragColor = color;
 }