Add alpha support to shadowOnlyMaterial

materialsLibrary/src/shadowOnly/babylon.shadowOnlyMaterial.ts

@@ -131,7 +131,7 @@ module BABYLON {
                 var shaderName = "shadowOnly";
                 var join = defines.toString();
                 var uniforms = ["world", "view", "viewProjection", "vEyePosition", "vLightsType",
-                                "vFogInfos", "vFogColor", "pointSize",
+                                "vFogInfos", "vFogColor", "pointSize", "alpha",
                                 "mBones",
                                 "vClipPlane"
                 ];
@@ -197,6 +197,8 @@ module BABYLON {
                     this._activeEffect.setFloat("pointSize", this.pointSize);
                 }
 
+                this._activeEffect.setFloat("alpha", this.alpha);
+
                 this._activeEffect.setVector3("vEyePosition", scene._mirroredCameraPosition ? scene._mirroredCameraPosition : scene.activeCamera.position);                
             }
 

materialsLibrary/src/shadowOnly/shadowOnly.fragment.fx

@@ -2,6 +2,7 @@
 
 // Constants
 uniform vec3 vEyePosition;
+uniform float alpha;
 
 // Input
 varying vec3 vPositionW;
@@ -45,7 +46,7 @@ void main(void) {
 #include<lightFragment>[0..1]
 
 	// Composition
-	vec4 color = vec4(0., 0., 0., 1.0 - clamp(shadow, 0., 1.));
+	vec4 color = vec4(0., 0., 0., 1.0 - clamp(shadow, 0., 1.) * alpha);
 
 #include<fogFragment>