feature(ElevationLayer): add visible property.

examples/js/GUI/GuiTools.js

@@ -98,13 +98,21 @@ GuiTools.prototype.addElevationLayerGUI = function addElevationLayerGUI(layer) {
     if (this.elevationGui.hasFolder(layer.id)) { return; }
     this.elevationGui.show();
     var folder = this.elevationGui.addFolder(layer.id);
-    folder.add({ frozen: layer.frozen }, 'frozen').onChange(function refreshFrozenGui(value) {
-        layer.frozen = value;
-    });
+    folder.add({ visible: layer.visible }, 'visible').onChange((function updateVisibility(value) {
+        layer.visible = value;
+        this.view.notifyChange(layer);
+        this.view.notifyChange(this.view.camera);
+        if (this.view.controls && this.view.controls.update) {
+            this.view.controls.update();
+        }
+    }).bind(this));
     folder.add({ scale: layer.scale }, 'scale').min(1.0).max(20000.0).onChange((function updateScale(value) {
         layer.scale = value;
         this.view.notifyChange(layer);
     }).bind(this));
+    folder.add({ frozen: layer.frozen }, 'frozen').onChange(function refreshFrozenGui(value) {
+        layer.frozen = value;
+    });
 };
 
 GuiTools.prototype.addImageryLayersGUI = function addImageryLayersGUI(layers) {

src/Layer/ElevationLayer.js

@@ -55,6 +55,7 @@ class ElevationLayer extends RasterLayer {
     constructor(id, config = {}) {
         super(id, config);
         this.isElevationLayer = true;
+        this.defineLayerProperty('visible', true);
         this.defineLayerProperty('scale', this.scale || 1.0);
     }
 
@@ -79,8 +80,11 @@ class ElevationLayer extends RasterLayer {
 
         // listen scaling elevation updating
         this.addEventListener('scale-property-changed', updateBBox);
+        // listen visibility elevation updating
+        this.addEventListener('visible-property-changed', updateBBox);
         // remove scaling elevation updating if node is removed
         node.addEventListener('dispose', () => {
+            this.removeEventListener('visible-property-changed', updateBBox);
             this.removeEventListener('scale-property-changed', updateBBox);
         });
 

src/Process/LayeredMaterialNodeProcessing.js

@@ -192,7 +192,8 @@ export function updateLayeredMaterialNodeElevation(context, layer, node, parent)
     }
 
     // Possible conditions to *not* update the elevation texture
-    if (layer.frozen ||
+    if (!layer.visible ||
+            layer.frozen ||
             !material.visible ||
             !node.layerUpdateState[layer.id].canTryUpdate()) {
         return;

src/Renderer/RasterTile.js

@@ -127,6 +127,8 @@ export class RasterElevationTile extends RasterTile {
         };
 
         this.scaleFactor = 1.0;
+        this._min = 0;
+        this._max = 0;
 
         // Define elevation properties
         if (layer.useRgbaTextureElevation) {
@@ -139,9 +141,6 @@ export class RasterElevationTile extends RasterTile {
             defaultEle.bias = layer.colorTextureElevationMinZ;
             this.min = this.layer.colorTextureElevationMinZ;
             this.max = this.layer.colorTextureElevationMaxZ;
-        } else {
-            this.min = 0;
-            this.max = 0;
         }
 
         this.bias = layer.bias || defaultEle.bias;
@@ -156,6 +155,22 @@ export class RasterElevationTile extends RasterTile {
         return this.layer.scale * this.scaleFactor;
     }
 
+    get min() {
+        return this.visible ? this._min : 0;
+    }
+
+    set min(value) {
+        this._min = value;
+    }
+
+    get max() {
+        return this.visible ? this._max : 0;
+    }
+
+    set max(value) {
+        this._max = value;
+    }
+
     dispose(removeEvent) {
         super.dispose(removeEvent);
         if (removeEvent) {

src/Renderer/Shader/Chunk/elevation_pars_vertex.glsl

@@ -5,6 +5,7 @@
         int mode;
         float zmin;
         float zmax;
+        bool visible;
     };
 
     uniform Layer       elevationLayers[NUM_VS_TEXTURES];

src/Renderer/Shader/Chunk/elevation_vertex.glsl

@@ -1,5 +1,5 @@
 #if NUM_VS_TEXTURES > 0
-    if(elevationTextureCount > 0) {
+    if(elevationTextureCount > 0 && elevationLayers[0].visible) {
         float elevation = getElevation(uv, elevationTextures[0], elevationOffsetScales[0], elevationLayers[0]);
         transformed += elevation * normal;
     }