Refactor PostProcessParameter to strong type

e2e/case/postProcess-customPass.ts

@@ -9,6 +9,7 @@ import {
   Engine,
   Material,
   PostProcess,
+  PostProcessEffectFloatParameter,
   PostProcessPass,
   PostProcessPassEvent,
   RenderTarget,
@@ -43,9 +44,7 @@ void main() {
 class CustomPass extends PostProcessPass {
   private _blitMaterial: Material;
 
-  set intensity(value) {
-    this._blitMaterial.shaderData.setFloat("intensity", value);
-  }
+  intensity = new PostProcessEffectFloatParameter(0.7, 0, 1);
 
   constructor(engine: Engine) {
     super(engine);

packages/core/src/postProcess/PostProcess.ts

@@ -127,4 +127,12 @@ export class PostProcess extends Component {
   override _onDisableInScene() {
     this.scene.postProcessManager._removePostProcess(this);
   }
+
+  /**
+   * @inheritdoc
+   */
+  override _onDestroy(): void {
+    super._onDestroy();
+    this._effects.length = 0;
+  }
 }

packages/core/src/postProcess/PostProcessEffectParameter.ts

@@ -1,21 +1,21 @@
 import { Color, MathUtil, Vector2, Vector3, Vector4 } from "@galacean/engine-math";
-import { Texture } from "../texture/Texture";
+import { Texture } from "../texture";
 
 /**
  * Represents a parameter of a post process effect.
  * @remarks
  * The parameter will be mixed to a final value and be used in post process manager.
  */
-export class PostProcessEffectParameter<T extends Number | Boolean | Color | Vector2 | Vector3 | Vector4 | Texture> {
+export abstract class PostProcessEffectParameter<T> {
   /**
    * Whether the parameter is enabled.
    */
   enabled = true;
 
-  private _value: T;
-  private _needLerp = false;
-  private _min?: number;
-  private _max?: number;
+  readonly type;
+
+  protected _needLerp = false;
+  protected _value: T;
 
   /**
    * The value of the parameter.
@@ -25,71 +25,184 @@ export class PostProcessEffectParameter<T extends Number | Boolean | Color | Vec
   }
 
   set value(value: T) {
-    if (value?.constructor === Number) {
-      this._value = <T>(<unknown>MathUtil.clamp(<number>value, this._min, this._max));
-    } else {
-      this._value = value;
+    this._value = value;
+  }
+
+  constructor(type, value: T, needLerp = false) {
+    this.type = type;
+    this._needLerp = needLerp;
+    this._value = value;
+  }
+
+  _lerp(to: T, factor: number) {
+    if (factor > 0) {
+      this.value = to;
     }
   }
+}
+
+/**
+ * Represents a float parameter of a post process effect.
+ */
+export class PostProcessEffectFloatParameter extends PostProcessEffectParameter<number> {
+  override get value(): number {
+    return this._value;
+  }
 
-  constructor(value: Exclude<T, number>, needLerp?: boolean);
-  constructor(value: Exclude<T, Boolean | Color | Vector2 | Vector3 | Vector4 | Texture>, needLerp?: boolean);
+  override set value(v: number) {
+    this._value = MathUtil.clamp(v, this._min, this._max);
+  }
+
+  /**
+   * Create a new float parameter.
+   * @param value - The default value of the parameter
+   * @param _min - The minimum value of the parameter, default is Number.NEGATIVE_INFINITY
+   * @param _max - The maximum value of the parameter, default is Number.POSITIVE_INFINITY
+   * @param needLerp - Whether the parameter needs to be lerp, default is true
+   */
   constructor(
-    value: Exclude<T, Boolean | Color | Vector2 | Vector3 | Vector4 | Texture>,
-    min?: number,
-    max?: number,
-    needLerp?: boolean
-  );
-
-  constructor(value: T, needLerpOrMin?: boolean | number, max?: number, needLerp?: boolean) {
-    if (typeof value === "number") {
-      if (typeof needLerpOrMin === "boolean") {
-        this._needLerp = needLerpOrMin;
-        this._min = Number.NEGATIVE_INFINITY;
-        this._max = Number.POSITIVE_INFINITY;
-      } else if (typeof needLerpOrMin === "number") {
-        this._min = needLerpOrMin;
-        this._max = max ?? Number.POSITIVE_INFINITY;
-        this._needLerp = needLerp ?? false;
-      } else if (needLerpOrMin == undefined) {
-        this._min = Number.NEGATIVE_INFINITY;
-        this._max = Number.POSITIVE_INFINITY;
-      }
+    value: number,
+    private _min = Number.NEGATIVE_INFINITY,
+    private _max = Number.POSITIVE_INFINITY,
+    needLerp = true
+  ) {
+    super(Number, value, needLerp);
+    this.value = value;
+  }
+
+  override _lerp(to: number, factor: number) {
+    if (this._needLerp) {
+      this.value = MathUtil.lerp(this.value, to, factor);
     } else {
-      this._needLerp = <boolean>needLerpOrMin ?? false;
+      super._lerp(to, factor);
     }
+  }
+}
 
-    this.value = value;
+/**
+ * Represents a boolean parameter of a post process effect.
+ */
+export class PostProcessEffectBoolParameter extends PostProcessEffectParameter<boolean> {
+  /**
+   * Create a new boolean parameter.
+   * @param value - The default value of the parameter
+   */
+  constructor(value: boolean) {
+    super(Boolean, value, false);
   }
+}
 
+/**
+ * Represents a texture parameter of a post process effect.
+ */
+export class PostProcessEffectTextureParameter extends PostProcessEffectParameter<Texture> {
   /**
-   * @internal
+   * Create a new texture parameter.
+   * @param value - The default texture of the parameter
    */
-  _lerp(to: T, factor: number) {
+  constructor(value: Texture) {
+    super(Texture, value, false);
+  }
+}
+
+/**
+ * Represents a color parameter of a post process effect.
+ */
+export class PostProcessEffectColorParameter extends PostProcessEffectParameter<Color> {
+  /**
+   * Create a new color parameter.
+   * @param value - The default color of the parameter
+   * @param needLerp - Whether the parameter needs to be lerp, default is true
+   */
+  constructor(value: Color, needLerp = true) {
+    super(Color, value, needLerp);
+  }
+
+  override _lerp(to: Color, factor: number) {
     if (this._needLerp) {
-      switch (this.value?.constructor) {
-        case Number:
-          this.value = <T>(<unknown>MathUtil.lerp(<number>this.value, <number>to, factor));
-          break;
-        case Color:
-          Color.lerp(<Color>this.value, <Color>to, factor, <Color>this.value);
-          break;
-        case Vector2:
-          Vector2.lerp(<Vector2>this.value, <Vector2>to, factor, <Vector2>this.value);
-          break;
-        case Vector3:
-          Vector3.lerp(<Vector3>this.value, <Vector3>to, factor, <Vector3>this.value);
-          break;
-        case Vector4:
-          Vector4.lerp(<Vector4>this.value, <Vector4>to, factor, <Vector4>this.value);
-          break;
-        default:
-          if (factor > 0) {
-            this.value = to;
-          }
-      }
-    } else if (factor > 0) {
-      this.value = to;
+      Color.lerp(this.value, to, factor, this.value);
+    } else {
+      super._lerp(to, factor);
     }
   }
 }
+
+/**
+ * Represents a vector2 parameter of a post process effect.
+ */
+export class PostProcessEffectVector2Parameter extends PostProcessEffectParameter<Vector2> {
+  /**
+   * Create a new vector2 parameter.
+   * @param value - The default vector2 of the parameter
+   * @param needLerp - Whether the parameter needs to be lerp, default is true
+   */
+  constructor(value: Vector2, needLerp = true) {
+    super(Vector2, value, needLerp);
+  }
+
+  override _lerp(to: Vector2, factor: number) {
+    if (this._needLerp) {
+      Vector2.lerp(this.value, to, factor, this.value);
+    } else {
+      super._lerp(to, factor);
+    }
+  }
+}
+
+/**
+ * Represents a vector3 parameter of a post process effect.
+ */
+export class PostProcessEffectVector3Parameter extends PostProcessEffectParameter<Vector3> {
+  /**
+   * Create a new vector3 parameter.
+   * @param value - The default vector3 of the parameter
+   * @param needLerp - Whether the parameter needs to be lerp, default is true
+   */
+  constructor(value: Vector3, needLerp = true) {
+    super(Vector3, value, needLerp);
+  }
+
+  override _lerp(to: Vector3, factor: number) {
+    if (this._needLerp) {
+      Vector3.lerp(this.value, to, factor, this.value);
+    } else {
+      super._lerp(to, factor);
+    }
+  }
+}
+
+/**
+ * Represents a vector4 parameter of a post process effect.
+ */
+export class PostProcessEffectVector4Parameter extends PostProcessEffectParameter<Vector4> {
+  /**
+   * Create a new vector4 parameter.
+   * @param value - The default vector4 of the parameter
+   * @param needLerp - Whether the parameter needs to be lerp, default is true
+   */
+  constructor(value: Vector4, needLerp = true) {
+    super(Vector4, value, needLerp);
+  }
+
+  override _lerp(to: Vector4, factor: number) {
+    if (this._needLerp) {
+      Vector4.lerp(this.value, to, factor, this.value);
+    } else {
+      super._lerp(to, factor);
+    }
+  }
+}
+
+/**
+ * Represents a enum parameter of a post process effect.
+ */
+export class PostProcessEffectEnumParameter<T> extends PostProcessEffectParameter<number> {
+  /**
+   * Create a new enum parameter.
+   * @param type - The type of the enum
+   * @param value - The default enum value of the parameter
+   */
+  constructor(type, value: number) {
+    super(type, value, false);
+  }
+}

packages/core/src/postProcess/effects/BloomEffect.ts

@@ -2,9 +2,14 @@ import { Color } from "@galacean/engine-math";
 import { Shader, ShaderMacro, ShaderPass, ShaderProperty } from "../../shader";
 import blitVs from "../../shaderlib/extra/Blit.vs.glsl";
 
-import { Texture2D } from "../../texture";
 import { PostProcessEffect } from "../PostProcessEffect";
-import { PostProcessEffectParameter } from "../PostProcessEffectParameter";
+import {
+  PostProcessEffectBoolParameter,
+  PostProcessEffectColorParameter,
+  PostProcessEffectEnumParameter,
+  PostProcessEffectFloatParameter,
+  PostProcessEffectTextureParameter
+} from "../PostProcessEffectParameter";
 import fragBlurH from "../shaders/Bloom/BloomBlurH.glsl";
 import fragBlurV from "../shaders/Bloom/BloomBlurV.glsl";
 import fragPrefilter from "../shaders/Bloom/BloomPrefilter.glsl";
@@ -55,43 +60,43 @@ export class BloomEffect extends PostProcessEffect {
    * Controls whether to use bicubic sampling instead of bilinear sampling for the upSampling passes.
    * @remarks This is slightly more expensive but helps getting smoother visuals.
    */
-  highQualityFiltering = new PostProcessEffectParameter(false);
+  highQualityFiltering = new PostProcessEffectBoolParameter(false);
 
   /**
    * Controls the starting resolution that this effect begins processing.
    */
-  downScale = new PostProcessEffectParameter(BloomDownScaleMode.Half);
+  downScale = new PostProcessEffectEnumParameter(BloomDownScaleMode, BloomDownScaleMode.Half);
 
   /**
    * Specifies a Texture to add smudges or dust to the bloom effect.
    */
-  dirtTexture = new PostProcessEffectParameter(<Texture2D>null);
+  dirtTexture = new PostProcessEffectTextureParameter(null);
 
   /**
    * Set the level of brightness to filter out pixels under this level.
    * @remarks This value is expressed in gamma-space.
    */
-  threshold = new PostProcessEffectParameter(0.9, 0, Number.POSITIVE_INFINITY, true);
+  threshold = new PostProcessEffectFloatParameter(0.9, 0);
 
   /**
    * Controls the radius of the bloom effect.
    */
-  scatter = new PostProcessEffectParameter(0.7, 0, 1, true);
+  scatter = new PostProcessEffectFloatParameter(0.7, 0, 1);
 
   /**
    * Controls the strength of the bloom effect.
    */
-  intensity = new PostProcessEffectParameter(0, 0, Number.POSITIVE_INFINITY, true);
+  intensity = new PostProcessEffectFloatParameter(0, 0);
 
   /**
    * Controls the strength of the lens dirt.
    */
-  dirtIntensity = new PostProcessEffectParameter(0, 0, Number.POSITIVE_INFINITY, true);
+  dirtIntensity = new PostProcessEffectFloatParameter(0, 0);
 
   /**
    * Specifies the tint of the bloom effect.
    */
-  tint = new PostProcessEffectParameter(new Color(1, 1, 1, 1), true);
+  tint = new PostProcessEffectColorParameter(new Color(1, 1, 1, 1));
 
   /** @inheritdoc */
   override isValid(): boolean {

packages/core/src/postProcess/effects/TonemappingEffect.ts

@@ -1,6 +1,6 @@
 import { ShaderMacro } from "../../shader";
 import { PostProcessEffect } from "../PostProcessEffect";
-import { PostProcessEffectParameter } from "../PostProcessEffectParameter";
+import { PostProcessEffectEnumParameter } from "../PostProcessEffectParameter";
 
 /**
  * Options to select a tonemapping algorithm to use.
@@ -28,5 +28,5 @@ export class TonemappingEffect extends PostProcessEffect {
   /**
    * Use this to select a tonemapping algorithm to use.
    */
-  mode = new PostProcessEffectParameter(TonemappingMode.Neutral, false);
+  mode = new PostProcessEffectEnumParameter(TonemappingMode, TonemappingMode.Neutral);
 }