/** * @author mrdoob / http://mrdoob.com/ */ THREE.CanvasRenderer = function ( parameters ) { console.log( 'THREE.CanvasRenderer', THREE.REVISION ); var smoothstep = THREE.Math.smoothstep; parameters = parameters || {}; var _this = this, _renderData, _elements, _lights, _projector = new THREE.Projector(), _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElement( 'canvas' ), _canvasWidth = _canvas.width, _canvasHeight = _canvas.height, _canvasWidthHalf = Math.floor( _canvasWidth / 2 ), _canvasHeightHalf = Math.floor( _canvasHeight / 2 ), _context = _canvas.getContext( '2d' ), _clearColor = new THREE.Color( 0x000000 ), _clearAlpha = 0, _contextGlobalAlpha = 1, _contextGlobalCompositeOperation = 0, _contextStrokeStyle = null, _contextFillStyle = null, _contextLineWidth = null, _contextLineCap = null, _contextLineJoin = null, _contextDashSize = null, _contextGapSize = 0, _camera, _v1, _v2, _v3, _v4, _v5 = new THREE.RenderableVertex(), _v6 = new THREE.RenderableVertex(), _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _v4x, _v4y, _v5x, _v5y, _v6x, _v6y, _color = new THREE.Color(), _color1 = new THREE.Color(), _color2 = new THREE.Color(), _color3 = new THREE.Color(), _color4 = new THREE.Color(), _diffuseColor = new THREE.Color(), _emissiveColor = new THREE.Color(), _lightColor = new THREE.Color(), _patterns = {}, _imagedatas = {}, _near, _far, _image, _uvs, _uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y, _clipBox = new THREE.Box2(), _clearBox = new THREE.Box2(), _elemBox = new THREE.Box2(), _ambientLight = new THREE.Color(), _directionalLights = new THREE.Color(), _pointLights = new THREE.Color(), _vector3 = new THREE.Vector3(), // Needed for PointLight _pixelMap, _pixelMapContext, _pixelMapImage, _pixelMapData, _gradientMap, _gradientMapContext, _gradientMapQuality = 16; _pixelMap = document.createElement( 'canvas' ); _pixelMap.width = _pixelMap.height = 2; _pixelMapContext = _pixelMap.getContext( '2d' ); _pixelMapContext.fillStyle = 'rgba(0,0,0,1)'; _pixelMapContext.fillRect( 0, 0, 2, 2 ); _pixelMapImage = _pixelMapContext.getImageData( 0, 0, 2, 2 ); _pixelMapData = _pixelMapImage.data; _gradientMap = document.createElement( 'canvas' ); _gradientMap.width = _gradientMap.height = _gradientMapQuality; _gradientMapContext = _gradientMap.getContext( '2d' ); _gradientMapContext.translate( - _gradientMapQuality / 2, - _gradientMapQuality / 2 ); _gradientMapContext.scale( _gradientMapQuality, _gradientMapQuality ); _gradientMapQuality --; // Fix UVs // dash+gap fallbacks for Firefox and everything else if ( _context.setLineDash === undefined ) { if ( _context.mozDash !== undefined ) { _context.setLineDash = function ( values ) { _context.mozDash = values[ 0 ] !== null ? values : null; } } else { _context.setLineDash = function () {} } } this.domElement = _canvas; this.devicePixelRatio = parameters.devicePixelRatio !== undefined ? parameters.devicePixelRatio : self.devicePixelRatio !== undefined ? self.devicePixelRatio : 1; this.autoClear = true; this.sortObjects = true; this.sortElements = true; this.info = { render: { vertices: 0, faces: 0 } } // WebGLRenderer compatibility this.supportsVertexTextures = function () {}; this.setFaceCulling = function () {}; this.setSize = function ( width, height, updateStyle ) { _canvasWidth = width * this.devicePixelRatio; _canvasHeight = height * this.devicePixelRatio; _canvasWidthHalf = Math.floor( _canvasWidth / 2 ); _canvasHeightHalf = Math.floor( _canvasHeight / 2 ); _canvas.width = _canvasWidth; _canvas.height = _canvasHeight; if ( this.devicePixelRatio !== 1 && updateStyle !== false ) { _canvas.style.width = width + 'px'; _canvas.style.height = height + 'px'; } _clipBox.set( new THREE.Vector2( - _canvasWidthHalf, - _canvasHeightHalf ), new THREE.Vector2( _canvasWidthHalf, _canvasHeightHalf ) ); _clearBox.set( new THREE.Vector2( - _canvasWidthHalf, - _canvasHeightHalf ), new THREE.Vector2( _canvasWidthHalf, _canvasHeightHalf ) ); _contextGlobalAlpha = 1; _contextGlobalCompositeOperation = 0; _contextStrokeStyle = null; _contextFillStyle = null; _contextLineWidth = null; _contextLineCap = null; _contextLineJoin = null; }; this.setClearColor = function ( color, alpha ) { _clearColor.set( color ); _clearAlpha = alpha !== undefined ? alpha : 1; _clearBox.set( new THREE.Vector2( - _canvasWidthHalf, - _canvasHeightHalf ), new THREE.Vector2( _canvasWidthHalf, _canvasHeightHalf ) ); }; this.setClearColorHex = function ( hex, alpha ) { console.warn( 'DEPRECATED: .setClearColorHex() is being removed. Use .setClearColor() instead.' ); this.setClearColor( hex, alpha ); }; this.getMaxAnisotropy = function () { return 0; }; this.clear = function () { _context.setTransform( 1, 0, 0, - 1, _canvasWidthHalf, _canvasHeightHalf ); if ( _clearBox.empty() === false ) { _clearBox.intersect( _clipBox ); _clearBox.expandByScalar( 2 ); if ( _clearAlpha < 1 ) { _context.clearRect( _clearBox.min.x | 0, _clearBox.min.y | 0, ( _clearBox.max.x - _clearBox.min.x ) | 0, ( _clearBox.max.y - _clearBox.min.y ) | 0 ); } if ( _clearAlpha > 0 ) { setBlending( THREE.NormalBlending ); setOpacity( 1 ); setFillStyle( 'rgba(' + Math.floor( _clearColor.r * 255 ) + ',' + Math.floor( _clearColor.g * 255 ) + ',' + Math.floor( _clearColor.b * 255 ) + ',' + _clearAlpha + ')' ); _context.fillRect( _clearBox.min.x | 0, _clearBox.min.y | 0, ( _clearBox.max.x - _clearBox.min.x ) | 0, ( _clearBox.max.y - _clearBox.min.y ) | 0 ); } _clearBox.makeEmpty(); } }; this.render = function ( scene, camera ) { if ( camera instanceof THREE.Camera === false ) { console.error( 'THREE.CanvasRenderer.render: camera is not an instance of THREE.Camera.' ); return; } if ( this.autoClear === true ) this.clear(); _context.setTransform( 1, 0, 0, - 1, _canvasWidthHalf, _canvasHeightHalf ); _this.info.render.vertices = 0; _this.info.render.faces = 0; _renderData = _projector.projectScene( scene, camera, this.sortObjects, this.sortElements ); _elements = _renderData.elements; _lights = _renderData.lights; _camera = camera; /* DEBUG setFillStyle( 'rgba( 0, 255, 255, 0.5 )' ); _context.fillRect( _clipBox.min.x, _clipBox.min.y, _clipBox.max.x - _clipBox.min.x, _clipBox.max.y - _clipBox.min.y ); */ calculateLights(); for ( var e = 0, el = _elements.length; e < el; e++ ) { var element = _elements[ e ]; var material = element.material; if ( material === undefined || material.visible === false ) continue; _elemBox.makeEmpty(); if ( element instanceof THREE.RenderableSprite ) { _v1 = element; _v1.x *= _canvasWidthHalf; _v1.y *= _canvasHeightHalf; renderSprite( _v1, element, material ); } else if ( element instanceof THREE.RenderableLine ) { _v1 = element.v1; _v2 = element.v2; _v1.positionScreen.x *= _canvasWidthHalf; _v1.positionScreen.y *= _canvasHeightHalf; _v2.positionScreen.x *= _canvasWidthHalf; _v2.positionScreen.y *= _canvasHeightHalf; _elemBox.setFromPoints( [ _v1.positionScreen, _v2.positionScreen ] ); if ( _clipBox.isIntersectionBox( _elemBox ) === true ) { renderLine( _v1, _v2, element, material ); } } else if ( element instanceof THREE.RenderableFace3 ) { _v1 = element.v1; _v2 = element.v2; _v3 = element.v3; if ( _v1.positionScreen.z < -1 || _v1.positionScreen.z > 1 ) continue; if ( _v2.positionScreen.z < -1 || _v2.positionScreen.z > 1 ) continue; if ( _v3.positionScreen.z < -1 || _v3.positionScreen.z > 1 ) continue; _v1.positionScreen.x *= _canvasWidthHalf; _v1.positionScreen.y *= _canvasHeightHalf; _v2.positionScreen.x *= _canvasWidthHalf; _v2.positionScreen.y *= _canvasHeightHalf; _v3.positionScreen.x *= _canvasWidthHalf; _v3.positionScreen.y *= _canvasHeightHalf; if ( material.overdraw > 0 ) { expand( _v1.positionScreen, _v2.positionScreen, material.overdraw ); expand( _v2.positionScreen, _v3.positionScreen, material.overdraw ); expand( _v3.positionScreen, _v1.positionScreen, material.overdraw ); } _elemBox.setFromPoints( [ _v1.positionScreen, _v2.positionScreen, _v3.positionScreen ] ); if ( _clipBox.isIntersectionBox( _elemBox ) === true ) { renderFace3( _v1, _v2, _v3, 0, 1, 2, element, material ); } } /* DEBUG setLineWidth( 1 ); setStrokeStyle( 'rgba( 0, 255, 0, 0.5 )' ); _context.strokeRect( _elemBox.min.x, _elemBox.min.y, _elemBox.max.x - _elemBox.min.x, _elemBox.max.y - _elemBox.min.y ); */ _clearBox.union( _elemBox ); } /* DEBUG setLineWidth( 1 ); setStrokeStyle( 'rgba( 255, 0, 0, 0.5 )' ); _context.strokeRect( _clearBox.min.x, _clearBox.min.y, _clearBox.max.x - _clearBox.min.x, _clearBox.max.y - _clearBox.min.y ); */ _context.setTransform( 1, 0, 0, 1, 0, 0 ); }; // function calculateLights() { _ambientLight.setRGB( 0, 0, 0 ); _directionalLights.setRGB( 0, 0, 0 ); _pointLights.setRGB( 0, 0, 0 ); for ( var l = 0, ll = _lights.length; l < ll; l ++ ) { var light = _lights[ l ]; var lightColor = light.color; if ( light instanceof THREE.AmbientLight ) { _ambientLight.add( lightColor ); } else if ( light instanceof THREE.DirectionalLight ) { // for sprites _directionalLights.add( lightColor ); } else if ( light instanceof THREE.PointLight ) { // for sprites _pointLights.add( lightColor ); } } } function calculateLight( position, normal, color ) { for ( var l = 0, ll = _lights.length; l < ll; l ++ ) { var light = _lights[ l ]; _lightColor.copy( light.color ); if ( light instanceof THREE.DirectionalLight ) { var lightPosition = _vector3.getPositionFromMatrix( light.matrixWorld ).normalize(); var amount = normal.dot( lightPosition ); if ( amount <= 0 ) continue; amount *= light.intensity; color.add( _lightColor.multiplyScalar( amount ) ); } else if ( light instanceof THREE.PointLight ) { var lightPosition = _vector3.getPositionFromMatrix( light.matrixWorld ); var amount = normal.dot( _vector3.subVectors( lightPosition, position ).normalize() ); if ( amount <= 0 ) continue; amount *= light.distance == 0 ? 1 : 1 - Math.min( position.distanceTo( lightPosition ) / light.distance, 1 ); if ( amount == 0 ) continue; amount *= light.intensity; color.add( _lightColor.multiplyScalar( amount ) ); } } } function renderSprite( v1, element, material ) { setOpacity( material.opacity ); setBlending( material.blending ); var scaleX = element.scale.x * _canvasWidthHalf; var scaleY = element.scale.y * _canvasHeightHalf; _elemBox.min.set( v1.x - ( scaleX * 0.5 ), v1.y - ( scaleY * 0.5 ) ); _elemBox.max.set( v1.x + ( scaleX * 0.5 ), v1.y + ( scaleY * 0.5 ) ); if ( _clipBox.isIntersectionBox( _elemBox ) === false ) { _elemBox.makeEmpty(); return; } if ( material instanceof THREE.SpriteMaterial || material instanceof THREE.ParticleSystemMaterial ) { // Backwards compatibility if ( material.map !== null ) { var bitmap = material.map.image; _context.save(); _context.translate( v1.x, v1.y ); _context.rotate( - material.rotation ); _context.scale( scaleX, - scaleY ); _context.drawImage( bitmap, 0, 0, bitmap.width, bitmap.height, - 0.5, - 0.5, 1, 1 ); _context.restore(); } else { setFillStyle( material.color.getStyle() ); _context.save(); _context.translate( v1.x, v1.y ); _context.rotate( - element.rotation ); _context.scale( scaleX, scaleY ); _context.fillRect( - 0.5, - 0.5, 1, 1 ); _context.restore(); } } else if ( material instanceof THREE.SpriteCanvasMaterial ) { setStrokeStyle( material.color.getStyle() ); setFillStyle( material.color.getStyle() ); _context.save(); _context.translate( v1.x, v1.y ); _context.rotate( - element.rotation ); _context.scale( scaleX, scaleY ); material.program( _context ); _context.restore(); } /* DEBUG setStrokeStyle( 'rgb(255,255,0)' ); _context.beginPath(); _context.moveTo( v1.x - 10, v1.y ); _context.lineTo( v1.x + 10, v1.y ); _context.moveTo( v1.x, v1.y - 10 ); _context.lineTo( v1.x, v1.y + 10 ); _context.stroke(); */ } function renderLine( v1, v2, element, material ) { setOpacity( material.opacity ); setBlending( material.blending ); _context.beginPath(); _context.moveTo( v1.positionScreen.x, v1.positionScreen.y ); _context.lineTo( v2.positionScreen.x, v2.positionScreen.y ); if ( material instanceof THREE.LineBasicMaterial ) { setLineWidth( material.linewidth ); setLineCap( material.linecap ); setLineJoin( material.linejoin ); if ( material.vertexColors !== THREE.VertexColors ) { setStrokeStyle( material.color.getStyle() ); } else { var colorStyle1 = element.vertexColors[0].getStyle(); var colorStyle2 = element.vertexColors[1].getStyle(); if ( colorStyle1 === colorStyle2 ) { setStrokeStyle( colorStyle1 ); } else { try { var grad = _context.createLinearGradient( v1.positionScreen.x, v1.positionScreen.y, v2.positionScreen.x, v2.positionScreen.y ); grad.addColorStop( 0, colorStyle1 ); grad.addColorStop( 1, colorStyle2 ); } catch ( exception ) { grad = colorStyle1; } setStrokeStyle( grad ); } } _context.stroke(); _elemBox.expandByScalar( material.linewidth * 2 ); } else if ( material instanceof THREE.LineDashedMaterial ) { setLineWidth( material.linewidth ); setLineCap( material.linecap ); setLineJoin( material.linejoin ); setStrokeStyle( material.color.getStyle() ); setDashAndGap( material.dashSize, material.gapSize ); _context.stroke(); _elemBox.expandByScalar( material.linewidth * 2 ); setDashAndGap( null, null ); } } function renderFace3( v1, v2, v3, uv1, uv2, uv3, element, material ) { _this.info.render.vertices += 3; _this.info.render.faces ++; setOpacity( material.opacity ); setBlending( material.blending ); _v1x = v1.positionScreen.x; _v1y = v1.positionScreen.y; _v2x = v2.positionScreen.x; _v2y = v2.positionScreen.y; _v3x = v3.positionScreen.x; _v3y = v3.positionScreen.y; drawTriangle( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y ); if ( ( material instanceof THREE.MeshLambertMaterial || material instanceof THREE.MeshPhongMaterial ) && material.map === null ) { _diffuseColor.copy( material.color ); _emissiveColor.copy( material.emissive ); if ( material.vertexColors === THREE.FaceColors ) { _diffuseColor.multiply( element.color ); } if ( material.wireframe === false && material.shading === THREE.SmoothShading && element.vertexNormalsLength === 3 ) { _color1.copy( _ambientLight ); _color2.copy( _ambientLight ); _color3.copy( _ambientLight ); calculateLight( element.v1.positionWorld, element.vertexNormalsModel[ 0 ], _color1 ); calculateLight( element.v2.positionWorld, element.vertexNormalsModel[ 1 ], _color2 ); calculateLight( element.v3.positionWorld, element.vertexNormalsModel[ 2 ], _color3 ); _color1.multiply( _diffuseColor ).add( _emissiveColor ); _color2.multiply( _diffuseColor ).add( _emissiveColor ); _color3.multiply( _diffuseColor ).add( _emissiveColor ); _color4.addColors( _color2, _color3 ).multiplyScalar( 0.5 ); _image = getGradientTexture( _color1, _color2, _color3, _color4 ); clipImage( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, 0, 0, 1, 0, 0, 1, _image ); } else { _color.copy( _ambientLight ); calculateLight( element.centroidModel, element.normalModel, _color ); _color.multiply( _diffuseColor ).add( _emissiveColor ); material.wireframe === true ? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin ) : fillPath( _color ); } } else if ( material instanceof THREE.MeshBasicMaterial || material instanceof THREE.MeshLambertMaterial || material instanceof THREE.MeshPhongMaterial ) { if ( material.map !== null ) { if ( material.map.mapping instanceof THREE.UVMapping ) { _uvs = element.uvs[ 0 ]; patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uvs[ uv1 ].x, _uvs[ uv1 ].y, _uvs[ uv2 ].x, _uvs[ uv2 ].y, _uvs[ uv3 ].x, _uvs[ uv3 ].y, material.map ); } } else if ( material.envMap !== null ) { if ( material.envMap.mapping instanceof THREE.SphericalReflectionMapping ) { _vector3.copy( element.vertexNormalsModelView[ uv1 ] ); _uv1x = 0.5 * _vector3.x + 0.5; _uv1y = 0.5 * _vector3.y + 0.5; _vector3.copy( element.vertexNormalsModelView[ uv2 ] ); _uv2x = 0.5 * _vector3.x + 0.5; _uv2y = 0.5 * _vector3.y + 0.5; _vector3.copy( element.vertexNormalsModelView[ uv3 ] ); _uv3x = 0.5 * _vector3.x + 0.5; _uv3y = 0.5 * _vector3.y + 0.5; patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y, material.envMap ); }/* else if ( material.envMap.mapping === THREE.SphericalRefractionMapping ) { }*/ } else { _color.copy( material.color ); if ( material.vertexColors === THREE.FaceColors ) { _color.multiply( element.color ); } material.wireframe === true ? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin ) : fillPath( _color ); } } else if ( material instanceof THREE.MeshDepthMaterial ) { _near = _camera.near; _far = _camera.far; _color1.r = _color1.g = _color1.b = 1 - smoothstep( v1.positionScreen.z * v1.positionScreen.w, _near, _far ); _color2.r = _color2.g = _color2.b = 1 - smoothstep( v2.positionScreen.z * v2.positionScreen.w, _near, _far ); _color3.r = _color3.g = _color3.b = 1 - smoothstep( v3.positionScreen.z * v3.positionScreen.w, _near, _far ); _color4.addColors( _color2, _color3 ).multiplyScalar( 0.5 ); _image = getGradientTexture( _color1, _color2, _color3, _color4 ); clipImage( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, 0, 0, 1, 0, 0, 1, _image ); } else if ( material instanceof THREE.MeshNormalMaterial ) { var normal; if ( material.shading === THREE.FlatShading ) { normal = element.normalModelView; _color.setRGB( normal.x, normal.y, normal.z ).multiplyScalar( 0.5 ).addScalar( 0.5 ); material.wireframe === true ? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin ) : fillPath( _color ); } else if ( material.shading === THREE.SmoothShading ) { normal = element.vertexNormalsModelView[ uv1 ]; _color1.setRGB( normal.x, normal.y, normal.z ).multiplyScalar( 0.5 ).addScalar( 0.5 ); normal = element.vertexNormalsModelView[ uv2 ]; _color2.setRGB( normal.x, normal.y, normal.z ).multiplyScalar( 0.5 ).addScalar( 0.5 ); normal = element.vertexNormalsModelView[ uv3 ]; _color3.setRGB( normal.x, normal.y, normal.z ).multiplyScalar( 0.5 ).addScalar( 0.5 ); _color4.addColors( _color2, _color3 ).multiplyScalar( 0.5 ); _image = getGradientTexture( _color1, _color2, _color3, _color4 ); clipImage( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, 0, 0, 1, 0, 0, 1, _image ); } } } // function drawTriangle( x0, y0, x1, y1, x2, y2 ) { _context.beginPath(); _context.moveTo( x0, y0 ); _context.lineTo( x1, y1 ); _context.lineTo( x2, y2 ); _context.closePath(); } function strokePath( color, linewidth, linecap, linejoin ) { setLineWidth( linewidth ); setLineCap( linecap ); setLineJoin( linejoin ); setStrokeStyle( color.getStyle() ); _context.stroke(); _elemBox.expandByScalar( linewidth * 2 ); } function fillPath( color ) { setFillStyle( color.getStyle() ); _context.fill(); } function patternPath( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, texture ) { if ( texture instanceof THREE.DataTexture || texture.image === undefined || texture.image.width === 0 ) return; if ( texture.needsUpdate === true ) { var repeatX = texture.wrapS === THREE.RepeatWrapping; var repeatY = texture.wrapT === THREE.RepeatWrapping; _patterns[ texture.id ] = _context.createPattern( texture.image, repeatX === true && repeatY === true ? 'repeat' : repeatX === true && repeatY === false ? 'repeat-x' : repeatX === false && repeatY === true ? 'repeat-y' : 'no-repeat' ); texture.needsUpdate = false; } _patterns[ texture.id ] === undefined ? setFillStyle( 'rgba(0,0,0,1)' ) : setFillStyle( _patterns[ texture.id ] ); // http://extremelysatisfactorytotalitarianism.com/blog/?p=2120 var a, b, c, d, e, f, det, idet, offsetX = texture.offset.x / texture.repeat.x, offsetY = texture.offset.y / texture.repeat.y, width = texture.image.width * texture.repeat.x, height = texture.image.height * texture.repeat.y; u0 = ( u0 + offsetX ) * width; v0 = ( 1.0 - v0 + offsetY ) * height; u1 = ( u1 + offsetX ) * width; v1 = ( 1.0 - v1 + offsetY ) * height; u2 = ( u2 + offsetX ) * width; v2 = ( 1.0 - v2 + offsetY ) * height; x1 -= x0; y1 -= y0; x2 -= x0; y2 -= y0; u1 -= u0; v1 -= v0; u2 -= u0; v2 -= v0; det = u1 * v2 - u2 * v1; if ( det === 0 ) { if ( _imagedatas[ texture.id ] === undefined ) { var canvas = document.createElement( 'canvas' ) canvas.width = texture.image.width; canvas.height = texture.image.height; var context = canvas.getContext( '2d' ); context.drawImage( texture.image, 0, 0 ); _imagedatas[ texture.id ] = context.getImageData( 0, 0, texture.image.width, texture.image.height ).data; } var data = _imagedatas[ texture.id ]; var index = ( Math.floor( u0 ) + Math.floor( v0 ) * texture.image.width ) * 4; _color.setRGB( data[ index ] / 255, data[ index + 1 ] / 255, data[ index + 2 ] / 255 ); fillPath( _color ); return; } idet = 1 / det; a = ( v2 * x1 - v1 * x2 ) * idet; b = ( v2 * y1 - v1 * y2 ) * idet; c = ( u1 * x2 - u2 * x1 ) * idet; d = ( u1 * y2 - u2 * y1 ) * idet; e = x0 - a * u0 - c * v0; f = y0 - b * u0 - d * v0; _context.save(); _context.transform( a, b, c, d, e, f ); _context.fill(); _context.restore(); } function clipImage( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, image ) { // http://extremelysatisfactorytotalitarianism.com/blog/?p=2120 var a, b, c, d, e, f, det, idet, width = image.width - 1, height = image.height - 1; u0 *= width; v0 *= height; u1 *= width; v1 *= height; u2 *= width; v2 *= height; x1 -= x0; y1 -= y0; x2 -= x0; y2 -= y0; u1 -= u0; v1 -= v0; u2 -= u0; v2 -= v0; det = u1 * v2 - u2 * v1; idet = 1 / det; a = ( v2 * x1 - v1 * x2 ) * idet; b = ( v2 * y1 - v1 * y2 ) * idet; c = ( u1 * x2 - u2 * x1 ) * idet; d = ( u1 * y2 - u2 * y1 ) * idet; e = x0 - a * u0 - c * v0; f = y0 - b * u0 - d * v0; _context.save(); _context.transform( a, b, c, d, e, f ); _context.clip(); _context.drawImage( image, 0, 0 ); _context.restore(); } function getGradientTexture( color1, color2, color3, color4 ) { // http://mrdoob.com/blog/post/710 _pixelMapData[ 0 ] = ( color1.r * 255 ) | 0; _pixelMapData[ 1 ] = ( color1.g * 255 ) | 0; _pixelMapData[ 2 ] = ( color1.b * 255 ) | 0; _pixelMapData[ 4 ] = ( color2.r * 255 ) | 0; _pixelMapData[ 5 ] = ( color2.g * 255 ) | 0; _pixelMapData[ 6 ] = ( color2.b * 255 ) | 0; _pixelMapData[ 8 ] = ( color3.r * 255 ) | 0; _pixelMapData[ 9 ] = ( color3.g * 255 ) | 0; _pixelMapData[ 10 ] = ( color3.b * 255 ) | 0; _pixelMapData[ 12 ] = ( color4.r * 255 ) | 0; _pixelMapData[ 13 ] = ( color4.g * 255 ) | 0; _pixelMapData[ 14 ] = ( color4.b * 255 ) | 0; _pixelMapContext.putImageData( _pixelMapImage, 0, 0 ); _gradientMapContext.drawImage( _pixelMap, 0, 0 ); return _gradientMap; } // Hide anti-alias gaps function expand( v1, v2, pixels ) { var x = v2.x - v1.x, y = v2.y - v1.y, det = x * x + y * y, idet; if ( det === 0 ) return; idet = pixels / Math.sqrt( det ); x *= idet; y *= idet; v2.x += x; v2.y += y; v1.x -= x; v1.y -= y; } // Context cached methods. function setOpacity( value ) { if ( _contextGlobalAlpha !== value ) { _context.globalAlpha = value; _contextGlobalAlpha = value; } } function setBlending( value ) { if ( _contextGlobalCompositeOperation !== value ) { if ( value === THREE.NormalBlending ) { _context.globalCompositeOperation = 'source-over'; } else if ( value === THREE.AdditiveBlending ) { _context.globalCompositeOperation = 'lighter'; } else if ( value === THREE.SubtractiveBlending ) { _context.globalCompositeOperation = 'darker'; } _contextGlobalCompositeOperation = value; } } function setLineWidth( value ) { if ( _contextLineWidth !== value ) { _context.lineWidth = value; _contextLineWidth = value; } } function setLineCap( value ) { // "butt", "round", "square" if ( _contextLineCap !== value ) { _context.lineCap = value; _contextLineCap = value; } } function setLineJoin( value ) { // "round", "bevel", "miter" if ( _contextLineJoin !== value ) { _context.lineJoin = value; _contextLineJoin = value; } } function setStrokeStyle( value ) { if ( _contextStrokeStyle !== value ) { _context.strokeStyle = value; _contextStrokeStyle = value; } } function setFillStyle( value ) { if ( _contextFillStyle !== value ) { _context.fillStyle = value; _contextFillStyle = value; } } function setDashAndGap( dashSizeValue, gapSizeValue ) { if ( _contextDashSize !== dashSizeValue || _contextGapSize !== gapSizeValue ) { _context.setLineDash( [ dashSizeValue, gapSizeValue ] ); _contextDashSize = dashSizeValue; _contextGapSize = gapSizeValue; } } };