adding file for caps problem

src/Rendering/subSurfaceScatteringPostProcess.ts

@@ -0,0 +1,67 @@
+import { Nullable } from "../types";
+import { Camera } from "../Cameras/camera";
+import { Effect } from "../Materials/effect";
+import { Texture } from "../Materials/Textures/texture";
+import { PostProcess, PostProcessOptions } from "./postProcess";
+import { Engine } from "../Engines/engine";
+import { Scene } from "../scene";
+import { Constants } from "../Engines/constants";
+import { Logger } from "../Misc/logger";
+
+import "../Shaders/imageProcessing.fragment";
+import "../Shaders/subSurfaceScattering.fragment";
+import "../Shaders/postprocess.vertex";
+
+/**
+ * Sub surface scattering post process
+ */
+export class SubSurfaceScatteringPostProcess extends PostProcess {
+    /** @hidden */
+    public texelWidth: number;
+    /** @hidden */
+    public texelHeight: number;
+
+    constructor(name: string, scene: Scene, options: number | PostProcessOptions, camera: Nullable<Camera> = null, samplingMode?: number, engine?: Engine, reusable?: boolean, textureType: number = Constants.TEXTURETYPE_UNSIGNED_INT) {
+        super(name, "subSurfaceScattering", ["texelSize", "viewportSize", "metersPerUnit"], ["diffusionS", "diffusionD", "filterRadii", "irradianceSampler", "depthSampler", "albedoSampler"], options, camera, samplingMode || Texture.BILINEAR_SAMPLINGMODE, engine, reusable, null, textureType, "postprocess", undefined, true);
+        this._scene = scene;
+
+        const defines = this._getDefines();
+        this.updateEffect(defines);
+
+        this.onApplyObservable.add((effect: Effect) => {
+            if (!scene.prePassRenderer) {
+                Logger.Error("PrePass needs to be enabled for subsurface scattering.");
+                return;
+            }
+            var texelSize = this.texelSize;
+            effect.setFloat("metersPerUnit", scene.prePassRenderer.metersPerUnit);
+            effect.setFloat2("texelSize", texelSize.x, texelSize.y);
+            effect.setTexture("irradianceSampler", scene.prePassRenderer.prePassRT.textures[1]);
+            effect.setTexture("depthSampler", scene.prePassRenderer.prePassRT.textures[2]);
+            effect.setTexture("albedoSampler", scene.prePassRenderer.prePassRT.textures[3]);
+            effect.setFloat2("viewportSize",
+                Math.tan(scene.activeCamera!.fov / 2) * scene.getEngine().getAspectRatio(scene.activeCamera!, true),
+                Math.tan(scene.activeCamera!.fov / 2));
+            effect.setArray3("diffusionS", scene.prePassRenderer.ssDiffusionS);
+            effect.setArray("diffusionD", scene.prePassRenderer.ssDiffusionD);
+            effect.setArray("filterRadii", scene.prePassRenderer.ssFilterRadii);
+        });
+
+    }
+
+    private _getDefines(): Nullable<string> {
+        const engine = this.getEngine();
+        if (!engine) {
+            return null;
+        }
+
+        let defines = "";
+
+        // if (this._scene.imageProcessingConfiguration.applyByPostProcess) {
+        //     // We must output linear color for post process
+        //     defines = defines + "#define LINEAR_OUTPUT\n";
+        // }
+
+        return defines;
+    }
+}