feat: initialize project with core dependencies and game entry point

node_modules/three/examples/jsm/effects/AsciiEffect.js

@@ -0,0 +1,310 @@
+/**
+ * A class that creates an ASCII effect.
+ *
+ * The ASCII generation is based on [jsascii](https://github.com/hassadee/jsascii/blob/master/jsascii.js).
+ *
+ * @three_import import { AsciiEffect } from 'three/addons/effects/AsciiEffect.js';
+ */
+class AsciiEffect {
+
+	/**
+	 * Constructs a new ASCII effect.
+	 *
+	 * @param {WebGLRenderer} renderer - The renderer.
+	 * @param {string} [charSet=' .:-=+*#%@'] - The char set.
+	 * @param {AsciiEffect~Options} [options] - The configuration parameter.
+	 */
+	constructor( renderer, charSet = ' .:-=+*#%@', options = {} ) {
+
+		// ' .,:;=|iI+hHOE#`$';
+		// darker bolder character set from https://github.com/saw/Canvas-ASCII-Art/
+		// ' .\'`^",:;Il!i~+_-?][}{1)(|/tfjrxnuvczXYUJCLQ0OZmwqpdbkhao*#MW&8%B@$'
+
+		// Some ASCII settings
+
+		const fResolution = options[ 'resolution' ] || 0.15;
+		const iScale = options[ 'scale' ] || 1;
+		const bColor = options[ 'color' ] || false;
+		const bAlpha = options[ 'alpha' ] || false;
+		const bBlock = options[ 'block' ] || false;
+		const bInvert = options[ 'invert' ] || false;
+		const strResolution = options[ 'strResolution' ] || 'low';
+
+		let width, height;
+
+		const domElement = document.createElement( 'div' );
+		domElement.style.cursor = 'default';
+
+		const oAscii = document.createElement( 'table' );
+		domElement.appendChild( oAscii );
+
+		let iWidth, iHeight;
+		let oImg;
+
+		/**
+		 * Resizes the effect.
+		 *
+		 * @param {number} w - The width of the effect in logical pixels.
+		 * @param {number} h - The height of the effect in logical pixels.
+		 */
+		this.setSize = function ( w, h ) {
+
+			width = w;
+			height = h;
+
+			renderer.setSize( w, h );
+
+			initAsciiSize();
+
+		};
+
+		/**
+		 * When using this effect, this method should be called instead of the
+		 * default {@link WebGLRenderer#render}.
+		 *
+		 * @param {Object3D} scene - The scene to render.
+		 * @param {Camera} camera - The camera.
+		 */
+		this.render = function ( scene, camera ) {
+
+			renderer.render( scene, camera );
+			asciifyImage( oAscii );
+
+		};
+
+		/**
+		 * The DOM element of the effect. This element must be used instead of the
+		 * default {@link WebGLRenderer#domElement}.
+		 *
+		 * @type {HTMLDivElement}
+		 */
+		this.domElement = domElement;
+
+
+		// Throw in ascii library from https://github.com/hassadee/jsascii/blob/master/jsascii.js (MIT License)
+
+		function initAsciiSize() {
+
+			iWidth = Math.floor( width * fResolution );
+			iHeight = Math.floor( height * fResolution );
+
+			oCanvas.width = iWidth;
+			oCanvas.height = iHeight;
+			// oCanvas.style.display = "none";
+			// oCanvas.style.width = iWidth;
+			// oCanvas.style.height = iHeight;
+
+			oImg = renderer.domElement;
+
+			if ( oImg.style.backgroundColor ) {
+
+				oAscii.rows[ 0 ].cells[ 0 ].style.backgroundColor = oImg.style.backgroundColor;
+				oAscii.rows[ 0 ].cells[ 0 ].style.color = oImg.style.color;
+
+			}
+
+			oAscii.cellSpacing = '0';
+			oAscii.cellPadding = '0';
+
+			const oStyle = oAscii.style;
+			oStyle.whiteSpace = 'pre';
+			oStyle.margin = '0px';
+			oStyle.padding = '0px';
+			oStyle.letterSpacing = fLetterSpacing + 'px';
+			oStyle.fontFamily = strFont;
+			oStyle.fontSize = fFontSize + 'px';
+			oStyle.lineHeight = fLineHeight + 'px';
+			oStyle.textAlign = 'left';
+			oStyle.textDecoration = 'none';
+
+		}
+
+
+		const strFont = 'courier new, monospace';
+
+		const oCanvasImg = renderer.domElement;
+
+		const oCanvas = document.createElement( 'canvas' );
+		if ( ! oCanvas.getContext ) {
+
+			return;
+
+		}
+
+		const oCtx = oCanvas.getContext( '2d' );
+		if ( ! oCtx.getImageData ) {
+
+			return;
+
+		}
+
+		let aCharList;
+		if ( charSet ) {
+
+			aCharList = ( charSet ).split( '' );
+
+		} else {
+
+			const aDefaultCharList = ( ' .,:;i1tfLCG08@' ).split( '' );
+			const aDefaultColorCharList = ( ' CGO08@' ).split( '' );
+			aCharList = ( bColor ? aDefaultColorCharList : aDefaultCharList );
+
+		}
+
+
+		// Setup dom
+
+		const fFontSize = ( 2 / fResolution ) * iScale;
+		const fLineHeight = ( 2 / fResolution ) * iScale;
+
+		// adjust letter-spacing for all combinations of scale and resolution to get it to fit the image width.
+
+		let fLetterSpacing = 0;
+
+		if ( strResolution == 'low' ) {
+
+			switch ( iScale ) {
+
+				case 1 : fLetterSpacing = - 1; break;
+				case 2 :
+				case 3 : fLetterSpacing = - 2.1; break;
+				case 4 : fLetterSpacing = - 3.1; break;
+				case 5 : fLetterSpacing = - 4.15; break;
+
+			}
+
+		}
+
+		if ( strResolution == 'medium' ) {
+
+			switch ( iScale ) {
+
+				case 1 : fLetterSpacing = 0; break;
+				case 2 : fLetterSpacing = - 1; break;
+				case 3 : fLetterSpacing = - 1.04; break;
+				case 4 :
+				case 5 : fLetterSpacing = - 2.1; break;
+
+			}
+
+		}
+
+		if ( strResolution == 'high' ) {
+
+			switch ( iScale ) {
+
+				case 1 :
+				case 2 : fLetterSpacing = 0; break;
+				case 3 :
+				case 4 :
+				case 5 : fLetterSpacing = - 1; break;
+
+			}
+
+		}
+
+
+		// can't get a span or div to flow like an img element, but a table works?
+
+
+		// convert img element to ascii
+
+		function asciifyImage( oAscii ) {
+
+			oCtx.clearRect( 0, 0, iWidth, iHeight );
+			oCtx.drawImage( oCanvasImg, 0, 0, iWidth, iHeight );
+			const oImgData = oCtx.getImageData( 0, 0, iWidth, iHeight ).data;
+
+			// Coloring loop starts now
+			let strChars = '';
+
+			const maxIdx = aCharList.length - 1;
+
+			// console.time('rendering');
+
+			for ( let y = 0; y < iHeight; y += 2 ) {
+
+				for ( let x = 0; x < iWidth; x ++ ) {
+
+					const iOffset = ( y * iWidth + x ) * 4;
+
+					const iRed = oImgData[ iOffset ];
+					const iGreen = oImgData[ iOffset + 1 ];
+					const iBlue = oImgData[ iOffset + 2 ];
+					const iAlpha = oImgData[ iOffset + 3 ];
+
+					let fBrightness = ( 0.3 * iRed + 0.59 * iGreen + 0.11 * iBlue ) / 255;
+					// fBrightness = (0.3*iRed + 0.5*iGreen + 0.3*iBlue) / 255;
+
+
+					if ( iAlpha == 0 ) {
+
+						// should calculate alpha instead, but quick hack :)
+						//fBrightness *= (iAlpha / 255);
+						fBrightness = 1;
+
+					}
+
+					let iCharIdx = Math.round( ( 1 - fBrightness ) * maxIdx );
+
+					if ( bInvert ) {
+
+						iCharIdx = maxIdx - iCharIdx;
+
+					}
+
+					// good for debugging
+					//fBrightness = Math.floor(fBrightness * 10);
+					//strThisChar = fBrightness;
+
+					let strThisChar = aCharList[ iCharIdx ];
+
+					if ( strThisChar === undefined || strThisChar == ' ' )
+						strThisChar = '&nbsp;';
+
+					if ( bColor ) {
+
+						strChars += '<span style=\''
+							+ 'color:rgb(' + iRed + ',' + iGreen + ',' + iBlue + ');'
+							+ ( bBlock ? 'background-color:rgb(' + iRed + ',' + iGreen + ',' + iBlue + ');' : '' )
+							+ ( bAlpha ? 'opacity:' + ( iAlpha / 255 ) + ';' : '' )
+							+ '\'>' + strThisChar + '</span>';
+
+					} else {
+
+						strChars += strThisChar;
+
+					}
+
+				}
+
+				strChars += '<br/>';
+
+			}
+
+			oAscii.innerHTML = `<tr><td style="display:block;width:${width}px;height:${height}px;overflow:hidden">${strChars}</td></tr>`;
+
+			// console.timeEnd('rendering');
+
+			// return oAscii;
+
+		}
+
+	}
+
+}
+
+/**
+ * This type represents configuration settings of `AsciiEffect`.
+ *
+ * @typedef {Object} AsciiEffect~Options
+ * @property {number} [resolution=0.15] - A higher value leads to more details.
+ * @property {number} [scale=1] - The scale of the effect.
+ * @property {boolean} [color=false] - Whether colors should be enabled or not. Better quality but slows down rendering.
+ * @property {boolean} [alpha=false] - Whether transparency should be enabled or not.
+ * @property {boolean} [block=false] - Whether blocked characters should be enabled or not.
+ * @property {boolean} [invert=false] - Whether colors should be inverted or not.
+ * @property {('low'|'medium'|'high')} [strResolution='low'] - The string resolution.
+ **/
+
+export { AsciiEffect };