More feature for the aggressive performance mode (#13014)

packages/dev/core/src/Materials/material.ts

@@ -1013,11 +1013,15 @@ export class Material implements IAnimatable {
      * @returns a boolean specifying if alpha blending is needed for the mesh
      */
     public needAlphaBlendingForMesh(mesh: AbstractMesh): boolean {
-        if (this._disableAlphaBlending && mesh.visibility >= 1.0) {
+        if (mesh.visibility < 1.0) {
+            return true;
+        }
+
+        if (this._disableAlphaBlending) {
             return false;
         }
 
-        return this.needAlphaBlending() || mesh.visibility < 1.0 || mesh.hasVertexAlpha;
+        return mesh.hasVertexAlpha || this.needAlphaBlending();
     }
 
     /**

packages/dev/core/src/Meshes/subMesh.ts

@@ -141,6 +141,8 @@ export class SubMesh implements ICullable {
     public _trianglePlanes: Plane[];
     /** @internal */
     public _lastColliderTransformMatrix: Nullable<Matrix> = null;
+    /** @internal */
+    public _wasDispatched = false;
 
     /** @internal */
     public _renderId = 0;

packages/dev/core/src/Particles/IParticleSystem.ts

@@ -278,6 +278,9 @@ export interface IParticleSystem {
     /** Gets or sets a matrix to use to compute projection */
     defaultProjectionMatrix: Matrix;
 
+    /** @internal */
+    _wasDispatched: boolean;
+
     /**
      * Gets the maximum number of particles active at the same time.
      * @returns The max number of active particles.

packages/dev/core/src/Particles/baseParticleSystem.ts

@@ -202,6 +202,9 @@ export class BaseParticleSystem {
      */
     public preventAutoStart: boolean = false;
 
+    /** @internal */
+    _wasDispatched = false;
+
     protected _rootUrl = "";
     private _noiseTexture: Nullable<ProceduralTexture>;
 

packages/dev/core/src/Rendering/renderingManager.ts

@@ -85,6 +85,12 @@ export class RenderingManager {
     private _customTransparentSortCompareFn: { [id: number]: Nullable<(a: SubMesh, b: SubMesh) => number> } = {};
     private _renderingGroupInfo: Nullable<RenderingGroupInfo> = new RenderingGroupInfo();
 
+    /**
+     * Gets or sets a boolean indicating that the manager will not reset between frames.
+     * This means that if a mesh becomes invisible or transparent it will not be visible until this boolean is set to false again.s
+     */
+    public maintainStateBetweenFrames = false;
+
     /**
      * Instantiates a new rendering group for a particular scene
      * @param scene Defines the scene the groups belongs to
@@ -97,6 +103,14 @@ export class RenderingManager {
         }
     }
 
+    public getRenderingGroup(id: number) {
+        const renderingGroupId = id || 0;
+
+        this._prepareRenderingGroup(renderingGroupId);
+
+        return this._renderingGroups[renderingGroupId];
+    }
+
     private _clearDepthStencilBuffer(depth = true, stencil = true): void {
         if (this._depthStencilBufferAlreadyCleaned) {
             return;
@@ -178,6 +192,10 @@ export class RenderingManager {
      * @internal
      */
     public reset(): void {
+        if (this.maintainStateBetweenFrames) {
+            return;
+        }
+
         for (let index = RenderingManager.MIN_RENDERINGGROUPS; index < RenderingManager.MAX_RENDERINGGROUPS; index++) {
             const renderingGroup = this._renderingGroups[index];
             if (renderingGroup) {
@@ -225,23 +243,23 @@ export class RenderingManager {
      * @param spriteManager Define the sprite manager to render
      */
     public dispatchSprites(spriteManager: ISpriteManager) {
-        const renderingGroupId = spriteManager.renderingGroupId || 0;
-
-        this._prepareRenderingGroup(renderingGroupId);
-
-        this._renderingGroups[renderingGroupId].dispatchSprites(spriteManager);
+        if (this.maintainStateBetweenFrames && spriteManager._wasDispatched) {
+            return;
+        }
+        spriteManager._wasDispatched = true;
+        this.getRenderingGroup(spriteManager.renderingGroupId).dispatchSprites(spriteManager);
     }
 
     /**
      * Add a particle system to the rendering manager in order to render it this frame.
      * @param particleSystem Define the particle system to render
      */
     public dispatchParticles(particleSystem: IParticleSystem) {
-        const renderingGroupId = particleSystem.renderingGroupId || 0;
-
-        this._prepareRenderingGroup(renderingGroupId);
-
-        this._renderingGroups[renderingGroupId].dispatchParticles(particleSystem);
+        if (this.maintainStateBetweenFrames && particleSystem._wasDispatched) {
+            return;
+        }
+        particleSystem._wasDispatched = true;
+        this.getRenderingGroup(particleSystem.renderingGroupId).dispatchParticles(particleSystem);
     }
 
     /**
@@ -254,11 +272,11 @@ export class RenderingManager {
         if (mesh === undefined) {
             mesh = subMesh.getMesh();
         }
-        const renderingGroupId = mesh.renderingGroupId || 0;
-
-        this._prepareRenderingGroup(renderingGroupId);
-
-        this._renderingGroups[renderingGroupId].dispatch(subMesh, mesh, material);
+        if (this.maintainStateBetweenFrames && subMesh._wasDispatched) {
+            return;
+        }
+        subMesh._wasDispatched = true;
+        this.getRenderingGroup(mesh.renderingGroupId).dispatch(subMesh, mesh, material);
     }
 
     /**

packages/dev/core/src/Sprites/spriteManager.ts

@@ -69,6 +69,9 @@ export interface ISpriteManager extends IDisposable {
     /** Defines the default height of a cell in the spritesheet */
     cellHeight: number;
 
+    /** @internal */
+    _wasDispatched: boolean;
+
     /**
      * Tests the intersection of a sprite with a specific ray.
      * @param ray The ray we are sending to test the collision
@@ -119,6 +122,9 @@ export class SpriteManager implements ISpriteManager {
     /** Gets or sets a boolean indicating if the sprites are pickable */
     public isPickable = false;
 
+    /** @internal */
+    public _wasDispatched = false;
+
     /**
      * An event triggered when the manager is disposed.
      */

packages/dev/core/src/scene.ts

@@ -283,10 +283,21 @@ export class Scene extends AbstractScene implements IAnimatable, IClipPlanesHold
         this._performancePriority = value;
 
         switch (value) {
+            case ScenePerformancePriority.BackwardCompatible:
+                this.skipFrustumClipping = false;
+                this._renderingManager.maintainStateBetweenFrames = false;
+                this.skipPointerMovePicking = false;
+                this.autoClear = true;
+                break;
+            case ScenePerformancePriority.Intermediate:
+                this.skipFrustumClipping = false;
+                this._renderingManager.maintainStateBetweenFrames = false;
+                this.skipPointerMovePicking = true;
+                this.autoClear = false;
+                break;
             case ScenePerformancePriority.Aggressive:
                 this.skipFrustumClipping = true;
-            // eslint-disable-next-line no-fallthrough
-            case ScenePerformancePriority.Intermediate:
+                this._renderingManager.maintainStateBetweenFrames = true;
                 this.skipPointerMovePicking = true;
                 this.autoClear = false;
                 break;
@@ -1323,6 +1334,13 @@ export class Scene extends AbstractScene implements IAnimatable, IClipPlanesHold
 
     private _renderingManager: RenderingManager;
 
+    /**
+     * Gets the scene's rendering manager
+     */
+    public get renderingManager() {
+        return this._renderingManager;
+    }
+
     /** @internal */
     public _activeAnimatables = new Array<Animatable>();