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WebGLRenderer.js
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WebGLRenderer.js
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import {
BackSide,
DoubleSide,
FrontSide,
RGBAFormat,
HalfFloatType,
FloatType,
UnsignedByteType,
LinearEncoding,
NoToneMapping,
LinearMipmapLinearFilter,
NearestFilter,
ClampToEdgeWrapping
} from '../constants.js';
import { Frustum } from '../math/Frustum.js';
import { Matrix4 } from '../math/Matrix4.js';
import { Vector3 } from '../math/Vector3.js';
import { Vector4 } from '../math/Vector4.js';
import { WebGLAnimation } from './webgl/WebGLAnimation.js';
import { WebGLAttributes } from './webgl/WebGLAttributes.js';
import { WebGLBackground } from './webgl/WebGLBackground.js';
import { WebGLBindingStates } from './webgl/WebGLBindingStates.js';
import { WebGLBufferRenderer } from './webgl/WebGLBufferRenderer.js';
import { WebGLCapabilities } from './webgl/WebGLCapabilities.js';
import { WebGLClipping } from './webgl/WebGLClipping.js';
import { WebGLCubeMaps } from './webgl/WebGLCubeMaps.js';
import { WebGLExtensions } from './webgl/WebGLExtensions.js';
import { WebGLGeometries } from './webgl/WebGLGeometries.js';
import { WebGLIndexedBufferRenderer } from './webgl/WebGLIndexedBufferRenderer.js';
import { WebGLInfo } from './webgl/WebGLInfo.js';
import { WebGLMorphtargets } from './webgl/WebGLMorphtargets.js';
import { WebGLMultisampleRenderTarget } from './WebGLMultisampleRenderTarget.js';
import { WebGLObjects } from './webgl/WebGLObjects.js';
import { WebGLPrograms } from './webgl/WebGLPrograms.js';
import { WebGLProperties } from './webgl/WebGLProperties.js';
import { WebGLRenderLists } from './webgl/WebGLRenderLists.js';
import { WebGLRenderStates } from './webgl/WebGLRenderStates.js';
import { WebGLRenderTarget } from './WebGLRenderTarget.js';
import { WebGLShadowMap } from './webgl/WebGLShadowMap.js';
import { WebGLState } from './webgl/WebGLState.js';
import { WebGLTextures } from './webgl/WebGLTextures.js';
import { WebGLUniforms } from './webgl/WebGLUniforms.js';
import { WebGLUtils } from './webgl/WebGLUtils.js';
import { WebXRManager } from './webxr/WebXRManager.js';
import { WebGLMaterials } from './webgl/WebGLMaterials.js';
function createCanvasElement() {
const canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
canvas.style.display = 'block';
return canvas;
}
function WebGLRenderer( parameters = {} ) {
const _canvas = parameters.canvas !== undefined ? parameters.canvas : createCanvasElement(),
_context = parameters.context !== undefined ? parameters.context : null,
_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
_depth = parameters.depth !== undefined ? parameters.depth : true,
_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,
_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',
_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;
let currentRenderList = null;
let currentRenderState = null;
// render() can be called from within a callback triggered by another render.
// We track this so that the nested render call gets its list and state isolated from the parent render call.
const renderListStack = [];
const renderStateStack = [];
// public properties
this.domElement = _canvas;
// Debug configuration container
this.debug = {
/**
* Enables error checking and reporting when shader programs are being compiled
* @type {boolean}
*/
checkShaderErrors: true
};
// clearing
this.autoClear = true;
this.autoClearColor = true;
this.autoClearDepth = true;
this.autoClearStencil = true;
// scene graph
this.sortObjects = true;
// user-defined clipping
this.clippingPlanes = [];
this.localClippingEnabled = false;
// physically based shading
this.gammaFactor = 2.0; // for backwards compatibility
this.outputEncoding = LinearEncoding;
// physical lights
this.physicallyCorrectLights = false;
// tone mapping
this.toneMapping = NoToneMapping;
this.toneMappingExposure = 1.0;
// internal properties
const _this = this;
let _isContextLost = false;
// internal state cache
let _currentActiveCubeFace = 0;
let _currentActiveMipmapLevel = 0;
let _currentRenderTarget = null;
let _currentMaterialId = - 1;
let _currentCamera = null;
const _currentViewport = new Vector4();
const _currentScissor = new Vector4();
let _currentScissorTest = null;
//
let _width = _canvas.width;
let _height = _canvas.height;
let _pixelRatio = 1;
let _opaqueSort = null;
let _transparentSort = null;
const _viewport = new Vector4( 0, 0, _width, _height );
const _scissor = new Vector4( 0, 0, _width, _height );
let _scissorTest = false;
//
const _currentDrawBuffers = [];
// frustum
const _frustum = new Frustum();
// clipping
let _clippingEnabled = false;
let _localClippingEnabled = false;
// transmission
let _transmissionRenderTarget = null;
// camera matrices cache
const _projScreenMatrix = new Matrix4();
const _vector3 = new Vector3();
const _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };
function getTargetPixelRatio() {
return _currentRenderTarget === null ? _pixelRatio : 1;
}
// initialize
let _gl = _context;
function getContext( contextNames, contextAttributes ) {
for ( let i = 0; i < contextNames.length; i ++ ) {
const contextName = contextNames[ i ];
const context = _canvas.getContext( contextName, contextAttributes );
if ( context !== null ) return context;
}
return null;
}
try {
const contextAttributes = {
alpha: _alpha,
depth: _depth,
stencil: _stencil,
antialias: _antialias,
premultipliedAlpha: _premultipliedAlpha,
preserveDrawingBuffer: _preserveDrawingBuffer,
powerPreference: _powerPreference,
failIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat
};
// event listeners must be registered before WebGL context is created, see #12753
_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );
if ( _gl === null ) {
const contextNames = [ 'webgl2', 'webgl', 'experimental-webgl' ];
if ( _this.isWebGL1Renderer === true ) {
contextNames.shift();
}
_gl = getContext( contextNames, contextAttributes );
if ( _gl === null ) {
if ( getContext( contextNames ) ) {
throw new Error( 'Error creating WebGL context with your selected attributes.' );
} else {
throw new Error( 'Error creating WebGL context.' );
}
}
}
// Some experimental-webgl implementations do not have getShaderPrecisionFormat
if ( _gl.getShaderPrecisionFormat === undefined ) {
_gl.getShaderPrecisionFormat = function () {
return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };
};
}
} catch ( error ) {
console.error( 'THREE.WebGLRenderer: ' + error.message );
throw error;
}
let extensions, capabilities, state, info;
let properties, textures, cubemaps, attributes, geometries, objects;
let programCache, materials, renderLists, renderStates, clipping, shadowMap;
let background, morphtargets, bufferRenderer, indexedBufferRenderer;
let utils, bindingStates;
function initGLContext() {
extensions = new WebGLExtensions( _gl );
capabilities = new WebGLCapabilities( _gl, extensions, parameters );
extensions.init( capabilities );
utils = new WebGLUtils( _gl, extensions, capabilities );
state = new WebGLState( _gl, extensions, capabilities );
_currentDrawBuffers[ 0 ] = _gl.BACK;
info = new WebGLInfo( _gl );
properties = new WebGLProperties();
textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );
cubemaps = new WebGLCubeMaps( _this );
attributes = new WebGLAttributes( _gl, capabilities );
bindingStates = new WebGLBindingStates( _gl, extensions, attributes, capabilities );
geometries = new WebGLGeometries( _gl, attributes, info, bindingStates );
objects = new WebGLObjects( _gl, geometries, attributes, info );
morphtargets = new WebGLMorphtargets( _gl );
clipping = new WebGLClipping( properties );
programCache = new WebGLPrograms( _this, cubemaps, extensions, capabilities, bindingStates, clipping );
materials = new WebGLMaterials( properties );
renderLists = new WebGLRenderLists( properties );
renderStates = new WebGLRenderStates( extensions, capabilities );
background = new WebGLBackground( _this, cubemaps, state, objects, _premultipliedAlpha );
shadowMap = new WebGLShadowMap( _this, objects, capabilities );
bufferRenderer = new WebGLBufferRenderer( _gl, extensions, info, capabilities );
indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info, capabilities );
info.programs = programCache.programs;
_this.capabilities = capabilities;
_this.extensions = extensions;
_this.properties = properties;
_this.renderLists = renderLists;
_this.shadowMap = shadowMap;
_this.state = state;
_this.info = info;
}
initGLContext();
// xr
const xr = new WebXRManager( _this, _gl );
this.xr = xr;
// API
this.getContext = function () {
return _gl;
};
this.getContextAttributes = function () {
return _gl.getContextAttributes();
};
this.forceContextLoss = function () {
const extension = extensions.get( 'WEBGL_lose_context' );
if ( extension ) extension.loseContext();
};
this.forceContextRestore = function () {
const extension = extensions.get( 'WEBGL_lose_context' );
if ( extension ) extension.restoreContext();
};
this.getPixelRatio = function () {
return _pixelRatio;
};
this.setPixelRatio = function ( value ) {
if ( value === undefined ) return;
_pixelRatio = value;
this.setSize( _width, _height, false );
};
this.getSize = function ( target ) {
return target.set( _width, _height );
};
this.setSize = function ( width, height, updateStyle ) {
if ( xr.isPresenting ) {
console.warn( 'THREE.WebGLRenderer: Can\'t change size while VR device is presenting.' );
return;
}
_width = width;
_height = height;
_canvas.width = Math.floor( width * _pixelRatio );
_canvas.height = Math.floor( height * _pixelRatio );
if ( updateStyle !== false ) {
_canvas.style.width = width + 'px';
_canvas.style.height = height + 'px';
}
this.setViewport( 0, 0, width, height );
};
this.getDrawingBufferSize = function ( target ) {
return target.set( _width * _pixelRatio, _height * _pixelRatio ).floor();
};
this.setDrawingBufferSize = function ( width, height, pixelRatio ) {
_width = width;
_height = height;
_pixelRatio = pixelRatio;
_canvas.width = Math.floor( width * pixelRatio );
_canvas.height = Math.floor( height * pixelRatio );
this.setViewport( 0, 0, width, height );
};
this.getCurrentViewport = function ( target ) {
return target.copy( _currentViewport );
};
this.getViewport = function ( target ) {
return target.copy( _viewport );
};
this.setViewport = function ( x, y, width, height ) {
if ( x.isVector4 ) {
_viewport.set( x.x, x.y, x.z, x.w );
} else {
_viewport.set( x, y, width, height );
}
state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );
};
this.getScissor = function ( target ) {
return target.copy( _scissor );
};
this.setScissor = function ( x, y, width, height ) {
if ( x.isVector4 ) {
_scissor.set( x.x, x.y, x.z, x.w );
} else {
_scissor.set( x, y, width, height );
}
state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );
};
this.getScissorTest = function () {
return _scissorTest;
};
this.setScissorTest = function ( boolean ) {
state.setScissorTest( _scissorTest = boolean );
};
this.setOpaqueSort = function ( method ) {
_opaqueSort = method;
};
this.setTransparentSort = function ( method ) {
_transparentSort = method;
};
// Clearing
this.getClearColor = function ( target ) {
return target.copy( background.getClearColor() );
};
this.setClearColor = function () {
background.setClearColor.apply( background, arguments );
};
this.getClearAlpha = function () {
return background.getClearAlpha();
};
this.setClearAlpha = function () {
background.setClearAlpha.apply( background, arguments );
};
this.clear = function ( color, depth, stencil ) {
let bits = 0;
if ( color === undefined || color ) bits |= _gl.COLOR_BUFFER_BIT;
if ( depth === undefined || depth ) bits |= _gl.DEPTH_BUFFER_BIT;
if ( stencil === undefined || stencil ) bits |= _gl.STENCIL_BUFFER_BIT;
_gl.clear( bits );
};
this.clearColor = function () {
this.clear( true, false, false );
};
this.clearDepth = function () {
this.clear( false, true, false );
};
this.clearStencil = function () {
this.clear( false, false, true );
};
//
this.dispose = function () {
_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );
renderLists.dispose();
renderStates.dispose();
properties.dispose();
cubemaps.dispose();
objects.dispose();
bindingStates.dispose();
xr.dispose();
xr.removeEventListener( 'sessionstart', onXRSessionStart );
xr.removeEventListener( 'sessionend', onXRSessionEnd );
if ( _transmissionRenderTarget ) {
_transmissionRenderTarget.dispose();
_transmissionRenderTarget = null;
}
animation.stop();
};
// Events
function onContextLost( event ) {
event.preventDefault();
console.log( 'THREE.WebGLRenderer: Context Lost.' );
_isContextLost = true;
}
function onContextRestore( /* event */ ) {
console.log( 'THREE.WebGLRenderer: Context Restored.' );
_isContextLost = false;
const infoAutoReset = info.autoReset;
const shadowMapEnabled = shadowMap.enabled;
const shadowMapAutoUpdate = shadowMap.autoUpdate;
const shadowMapNeedsUpdate = shadowMap.needsUpdate;
const shadowMapType = shadowMap.type;
initGLContext();
info.autoReset = infoAutoReset;
shadowMap.enabled = shadowMapEnabled;
shadowMap.autoUpdate = shadowMapAutoUpdate;
shadowMap.needsUpdate = shadowMapNeedsUpdate;
shadowMap.type = shadowMapType;
}
function onMaterialDispose( event ) {
const material = event.target;
material.removeEventListener( 'dispose', onMaterialDispose );
deallocateMaterial( material );
}
// Buffer deallocation
function deallocateMaterial( material ) {
releaseMaterialProgramReferences( material );
properties.remove( material );
}
function releaseMaterialProgramReferences( material ) {
const programs = properties.get( material ).programs;
if ( programs !== undefined ) {
programs.forEach( function ( program ) {
programCache.releaseProgram( program );
} );
}
}
// Buffer rendering
function renderObjectImmediate( object, program ) {
object.render( function ( object ) {
_this.renderBufferImmediate( object, program );
} );
}
this.renderBufferImmediate = function ( object, program ) {
bindingStates.initAttributes();
const buffers = properties.get( object );
if ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();
if ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();
if ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();
if ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();
const programAttributes = program.getAttributes();
if ( object.hasPositions ) {
_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.position );
_gl.bufferData( _gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW );
bindingStates.enableAttribute( programAttributes.position );
_gl.vertexAttribPointer( programAttributes.position, 3, _gl.FLOAT, false, 0, 0 );
}
if ( object.hasNormals ) {
_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.normal );
_gl.bufferData( _gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW );
bindingStates.enableAttribute( programAttributes.normal );
_gl.vertexAttribPointer( programAttributes.normal, 3, _gl.FLOAT, false, 0, 0 );
}
if ( object.hasUvs ) {
_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.uv );
_gl.bufferData( _gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW );
bindingStates.enableAttribute( programAttributes.uv );
_gl.vertexAttribPointer( programAttributes.uv, 2, _gl.FLOAT, false, 0, 0 );
}
if ( object.hasColors ) {
_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.color );
_gl.bufferData( _gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW );
bindingStates.enableAttribute( programAttributes.color );
_gl.vertexAttribPointer( programAttributes.color, 3, _gl.FLOAT, false, 0, 0 );
}
bindingStates.disableUnusedAttributes();
_gl.drawArrays( _gl.TRIANGLES, 0, object.count );
object.count = 0;
};
this.renderBufferDirect = function ( camera, scene, geometry, material, object, group ) {
if ( scene === null ) scene = _emptyScene; // renderBufferDirect second parameter used to be fog (could be null)
const frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );
const program = setProgram( camera, scene, material, object );
state.setMaterial( material, frontFaceCW );
//
let index = geometry.index;
const position = geometry.attributes.position;
//
if ( index === null ) {
if ( position === undefined || position.count === 0 ) return;
} else if ( index.count === 0 ) {
return;
}
//
let rangeFactor = 1;
if ( material.wireframe === true ) {
index = geometries.getWireframeAttribute( geometry );
rangeFactor = 2;
}
if ( material.morphTargets || material.morphNormals ) {
morphtargets.update( object, geometry, material, program );
}
bindingStates.setup( object, material, program, geometry, index );
let attribute;
let renderer = bufferRenderer;
if ( index !== null ) {
attribute = attributes.get( index );
renderer = indexedBufferRenderer;
renderer.setIndex( attribute );
}
//
const dataCount = ( index !== null ) ? index.count : position.count;
const rangeStart = geometry.drawRange.start * rangeFactor;
const rangeCount = geometry.drawRange.count * rangeFactor;
const groupStart = group !== null ? group.start * rangeFactor : 0;
const groupCount = group !== null ? group.count * rangeFactor : Infinity;
const drawStart = Math.max( rangeStart, groupStart );
const drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;
const drawCount = Math.max( 0, drawEnd - drawStart + 1 );
if ( drawCount === 0 ) return;
//
if ( object.isMesh ) {
if ( material.wireframe === true ) {
state.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );
renderer.setMode( _gl.LINES );
} else {
renderer.setMode( _gl.TRIANGLES );
}
} else if ( object.isLine ) {
let lineWidth = material.linewidth;
if ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material
state.setLineWidth( lineWidth * getTargetPixelRatio() );
if ( object.isLineSegments ) {
renderer.setMode( _gl.LINES );
} else if ( object.isLineLoop ) {
renderer.setMode( _gl.LINE_LOOP );
} else {
renderer.setMode( _gl.LINE_STRIP );
}
} else if ( object.isPoints ) {
renderer.setMode( _gl.POINTS );
} else if ( object.isSprite ) {
renderer.setMode( _gl.TRIANGLES );
}
if ( object.isInstancedMesh ) {
renderer.renderInstances( drawStart, drawCount, object.count );
} else if ( geometry.isInstancedBufferGeometry ) {
const instanceCount = Math.min( geometry.instanceCount, geometry._maxInstanceCount );
renderer.renderInstances( drawStart, drawCount, instanceCount );
} else {
renderer.render( drawStart, drawCount );
}
};
// Compile
this.compile = function ( scene, camera ) {
currentRenderState = renderStates.get( scene );
currentRenderState.init();
scene.traverseVisible( function ( object ) {
if ( object.isLight && object.layers.test( camera.layers ) ) {
currentRenderState.pushLight( object );
if ( object.castShadow ) {
currentRenderState.pushShadow( object );
}
}
} );
currentRenderState.setupLights();
scene.traverse( function ( object ) {
const material = object.material;
if ( material ) {
if ( Array.isArray( material ) ) {
for ( let i = 0; i < material.length; i ++ ) {
const material2 = material[ i ];
getProgram( material2, scene, object );
}
} else {
getProgram( material, scene, object );
}
}
} );
};
// Animation Loop
let onAnimationFrameCallback = null;
function onAnimationFrame( time ) {
if ( onAnimationFrameCallback ) onAnimationFrameCallback( time );
}
function onXRSessionStart() {
animation.stop();
}
function onXRSessionEnd() {
animation.start();
}
const animation = new WebGLAnimation();
animation.setAnimationLoop( onAnimationFrame );
if ( typeof window !== 'undefined' ) animation.setContext( window );
this.setAnimationLoop = function ( callback ) {
onAnimationFrameCallback = callback;
xr.setAnimationLoop( callback );
( callback === null ) ? animation.stop() : animation.start();
};
xr.addEventListener( 'sessionstart', onXRSessionStart );
xr.addEventListener( 'sessionend', onXRSessionEnd );
// Rendering
this.render = function ( scene, camera ) {
if ( camera !== undefined && camera.isCamera !== true ) {
console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
return;
}
if ( _isContextLost === true ) return;
// update scene graph
if ( scene.autoUpdate === true ) scene.updateMatrixWorld();
// update camera matrices and frustum
if ( camera.parent === null ) camera.updateMatrixWorld();
if ( xr.enabled === true && xr.isPresenting === true ) {
if ( xr.cameraAutoUpdate === true ) xr.updateCamera( camera );
camera = xr.getCamera(); // use XR camera for rendering
}
//
if ( scene.isScene === true ) scene.onBeforeRender( _this, scene, camera, _currentRenderTarget );
currentRenderState = renderStates.get( scene, renderStateStack.length );
currentRenderState.init();
renderStateStack.push( currentRenderState );
_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
_frustum.setFromProjectionMatrix( _projScreenMatrix );