add globe filterColor

modules/option/ViewerOption.js

@@ -130,6 +130,16 @@ class ViewerOption {
         globeOption?.translucency?.frontFaceAlphaByDistance
     })
 
+    if (globeOption?.filterColor) {
+      let filterColor = globeOption?.filterColor
+      let globeFS = globe._surfaceShaderSet.baseFragmentShaderSource
+      let oriShder = globeFS.sources[globeFS.sources.length - 1]
+      globeFS.sources[globeFS.sources.length - 1] = oriShder.replace(
+        'gl_FragColor = finalColor;',
+        `gl_FragColor = finalColor * vec4(${filterColor.red},${filterColor.green},${filterColor.blue},${filterColor.alpha});`
+      )
+    }
+
     return this
   }