Add color option to EPT/COPC examples.

Author: connormanning

examples/copc.html

@@ -73,12 +73,14 @@
             else path = "../pointclouds/" + name + "/ept.json";
         }
 
+		var c = getQueryParam('c');
 		Potree.loadPointCloud(path, name, function(e){
 			viewer.scene.addPointCloud(e.pointcloud);
 
 			let material = e.pointcloud.material;
 			material.size = 1;
 			material.pointSizeType = Potree.PointSizeType.ADAPTIVE;
+			if (c) material.activeAttributeName = c;
 
 			viewer.fitToScreen(0.5);
 		});

examples/ept.html

@@ -73,12 +73,14 @@
             else path = "../pointclouds/" + name + "/ept.json";
         }
 
+		var c = getQueryParam('c');
 		Potree.loadPointCloud(path, name, function(e){
 			viewer.scene.addPointCloud(e.pointcloud);
 
 			let material = e.pointcloud.material;
 			material.size = 1;
 			material.pointSizeType = Potree.PointSizeType.ADAPTIVE;
+			if (c) material.activeAttributeName = c;
 
 			viewer.fitToScreen(0.5);
 		});