feat: initialize project with core dependencies and game entry point

node_modules/three/examples/jsm/postprocessing/GlitchPass.js

@@ -0,0 +1,177 @@
+import {
+	DataTexture,
+	FloatType,
+	MathUtils,
+	RedFormat,
+	ShaderMaterial,
+	UniformsUtils
+} from 'three';
+import { Pass, FullScreenQuad } from './Pass.js';
+import { DigitalGlitch } from '../shaders/DigitalGlitch.js';
+
+/**
+ * Pass for creating a glitch effect.
+ *
+ * ```js
+ * const glitchPass = new GlitchPass();
+ * composer.addPass( glitchPass );
+ * ```
+ *
+ * @augments Pass
+ * @three_import import { GlitchPass } from 'three/addons/postprocessing/GlitchPass.js';
+ */
+class GlitchPass extends Pass {
+
+	/**
+	 * Constructs a new glitch pass.
+	 *
+	 * @param {number} [dt_size=64] - The size of the displacement texture
+	 * for digital glitch squares.
+	 */
+	constructor( dt_size = 64 ) {
+
+		super();
+
+		/**
+		 * The pass uniforms.
+		 *
+		 * @type {Object}
+		 */
+		this.uniforms = UniformsUtils.clone( DigitalGlitch.uniforms );
+
+		/**
+		 * The pass material.
+		 *
+		 * @type {ShaderMaterial}
+		 */
+		this.material = new ShaderMaterial( {
+			uniforms: this.uniforms,
+			vertexShader: DigitalGlitch.vertexShader,
+			fragmentShader: DigitalGlitch.fragmentShader
+		} );
+
+		/**
+		 * Whether to noticeably increase the effect intensity or not.
+		 *
+		 * @type {boolean}
+		 * @default false
+		 */
+		this.goWild = false;
+
+		// internals
+
+		this._heightMap = this._generateHeightmap( dt_size );
+		this.uniforms[ 'tDisp' ].value = this._heightMap;
+
+		this._fsQuad = new FullScreenQuad( this.material );
+
+		this._curF = 0;
+		this._randX = 0;
+
+		this._generateTrigger();
+
+	}
+
+	/**
+	 * Performs the glitch pass.
+	 *
+	 * @param {WebGLRenderer} renderer - The renderer.
+	 * @param {WebGLRenderTarget} writeBuffer - The write buffer. This buffer is intended as the rendering
+	 * destination for the pass.
+	 * @param {WebGLRenderTarget} readBuffer - The read buffer. The pass can access the result from the
+	 * previous pass from this buffer.
+	 * @param {number} deltaTime - The delta time in seconds.
+	 * @param {boolean} maskActive - Whether masking is active or not.
+	 */
+	render( renderer, writeBuffer, readBuffer /*, deltaTime, maskActive */ ) {
+
+		this.uniforms[ 'tDiffuse' ].value = readBuffer.texture;
+		this.uniforms[ 'seed' ].value = Math.random(); // default seeding
+		this.uniforms[ 'byp' ].value = 0;
+
+		if ( this._curF % this._randX == 0 || this.goWild == true ) {
+
+			this.uniforms[ 'amount' ].value = Math.random() / 30;
+			this.uniforms[ 'angle' ].value = MathUtils.randFloat( - Math.PI, Math.PI );
+			this.uniforms[ 'seed_x' ].value = MathUtils.randFloat( - 1, 1 );
+			this.uniforms[ 'seed_y' ].value = MathUtils.randFloat( - 1, 1 );
+			this.uniforms[ 'distortion_x' ].value = MathUtils.randFloat( 0, 1 );
+			this.uniforms[ 'distortion_y' ].value = MathUtils.randFloat( 0, 1 );
+			this._curF = 0;
+			this._generateTrigger();
+
+		} else if ( this._curF % this._randX < this._randX / 5 ) {
+
+			this.uniforms[ 'amount' ].value = Math.random() / 90;
+			this.uniforms[ 'angle' ].value = MathUtils.randFloat( - Math.PI, Math.PI );
+			this.uniforms[ 'distortion_x' ].value = MathUtils.randFloat( 0, 1 );
+			this.uniforms[ 'distortion_y' ].value = MathUtils.randFloat( 0, 1 );
+			this.uniforms[ 'seed_x' ].value = MathUtils.randFloat( - 0.3, 0.3 );
+			this.uniforms[ 'seed_y' ].value = MathUtils.randFloat( - 0.3, 0.3 );
+
+		} else if ( this.goWild == false ) {
+
+			this.uniforms[ 'byp' ].value = 1;
+
+		}
+
+		this._curF ++;
+
+		if ( this.renderToScreen ) {
+
+			renderer.setRenderTarget( null );
+			this._fsQuad.render( renderer );
+
+		} else {
+
+			renderer.setRenderTarget( writeBuffer );
+			if ( this.clear ) renderer.clear();
+			this._fsQuad.render( renderer );
+
+		}
+
+	}
+
+	/**
+	 * Frees the GPU-related resources allocated by this instance. Call this
+	 * method whenever the pass is no longer used in your app.
+	 */
+	dispose() {
+
+		this.material.dispose();
+
+		this._heightMap.dispose();
+
+		this._fsQuad.dispose();
+
+	}
+
+	// internals
+
+	_generateTrigger() {
+
+		this._randX = MathUtils.randInt( 120, 240 );
+
+	}
+
+	_generateHeightmap( dt_size ) {
+
+		const data_arr = new Float32Array( dt_size * dt_size );
+		const length = dt_size * dt_size;
+
+		for ( let i = 0; i < length; i ++ ) {
+
+			const val = MathUtils.randFloat( 0, 1 );
+			data_arr[ i ] = val;
+
+		}
+
+		const texture = new DataTexture( data_arr, dt_size, dt_size, RedFormat, FloatType );
+		texture.needsUpdate = true;
+		return texture;
+
+	}
+
+}
+
+export { GlitchPass };