Merge pull request #6751 from AnalyticalGraphicsInc/clampDepthFarPlane

clamp to far plane for polyline on terrain volumes
CesiumGS · Jun 28, 2018 · d3cc317 · d3cc317
2 parents f5e1a7d + 8997f2f
commit d3cc317
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/Source/Shaders/PolylineShadowVolumeFS.glsl b/Source/Shaders/PolylineShadowVolumeFS.glsl
@@ -1,3 +1,7 @@
+#ifdef GL_EXT_frag_depth
+#extension GL_EXT_frag_depth : enable
+#endif
+
 varying vec4 v_startPlaneNormalEcAndHalfWidth;
 varying vec4 v_endPlaneNormalEcAndBatchId;
 varying vec4 v_rightPlaneEC; // Technically can compute distance for this here
@@ -78,4 +82,6 @@ void main(void)
     czm_material material = czm_getMaterial(materialInput);
     gl_FragColor = vec4(material.diffuse + material.emission, material.alpha);
 #endif // PER_INSTANCE_COLOR
+
+    czm_writeDepthClampedToFarPlane();
 }
diff --git a/Source/Shaders/PolylineShadowVolumeVS.glsl b/Source/Shaders/PolylineShadowVolumeVS.glsl
@@ -157,7 +157,7 @@ void main()
 #endif
 
     positionEC.xyz += width * normalEC;
-    gl_Position = czm_projection * positionEC;
+    gl_Position = czm_depthClampFarPlane(czm_projection * positionEC);
 
 #ifdef ANGLE_VARYING
     // Approximate relative screen space direction of the line.