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renderer.js
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renderer.js
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var registerSystem = require('../core/system').registerSystem;
var utils = require('../utils/');
var THREE = require('../lib/three');
var debug = utils.debug;
var warn = debug('components:renderer:warn');
/**
* Determines state of various renderer properties.
*/
module.exports.System = registerSystem('renderer', {
schema: {
antialias: {default: 'auto', oneOf: ['true', 'false', 'auto']},
highRefreshRate: {default: utils.device.isOculusBrowser()},
logarithmicDepthBuffer: {default: 'auto', oneOf: ['true', 'false', 'auto']},
maxCanvasWidth: {default: -1},
maxCanvasHeight: {default: -1},
multiviewStereo: {default: false},
physicallyCorrectLights: {default: false},
exposure: {default: 1, if: {toneMapping: ['ACESFilmic', 'linear', 'reinhard', 'cineon']}},
toneMapping: {default: 'no', oneOf: ['no', 'ACESFilmic', 'linear', 'reinhard', 'cineon']},
precision: {default: 'high', oneOf: ['high', 'medium', 'low']},
anisotropy: {default: 1},
sortTransparentObjects: {default: false},
colorManagement: {default: true},
alpha: {default: true},
stencil: {default: false},
foveationLevel: {default: 1}
},
init: function () {
var data = this.data;
var sceneEl = this.el;
var toneMappingName = this.data.toneMapping.charAt(0).toUpperCase() + this.data.toneMapping.slice(1);
// This is the rendering engine, such as THREE.js so copy over any persistent properties from the rendering system.
var renderer = sceneEl.renderer;
if (!data.physicallyCorrectLights) {
renderer.useLegacyLights = !data.physicallyCorrectLights;
}
renderer.toneMapping = THREE[toneMappingName + 'ToneMapping'];
THREE.Texture.DEFAULT_ANISOTROPY = data.anisotropy;
THREE.ColorManagement.enabled = data.colorManagement;
renderer.outputColorSpace = data.colorManagement ? THREE.SRGBColorSpace : THREE.LinearSRGBColorSpace;
if (sceneEl.hasAttribute('antialias')) {
warn('Component `antialias` is deprecated. Use `renderer="antialias: true"` instead.');
}
if (sceneEl.hasAttribute('logarithmicDepthBuffer')) {
warn('Component `logarithmicDepthBuffer` is deprecated. Use `renderer="logarithmicDepthBuffer: true"` instead.');
}
// These properties are always the same, regardless of rendered configuration
renderer.sortObjects = true;
renderer.setOpaqueSort(sortFrontToBack);
},
update: function () {
var data = this.data;
var sceneEl = this.el;
var renderer = sceneEl.renderer;
var toneMappingName = this.data.toneMapping.charAt(0).toUpperCase() + this.data.toneMapping.slice(1);
renderer.toneMapping = THREE[toneMappingName + 'ToneMapping'];
renderer.toneMappingExposure = data.exposure;
renderer.xr.setFoveation(data.foveationLevel);
if (data.sortObjects) {
warn('`sortObjects` property is deprecated. Use `renderer="sortTransparentObjects: true"` instead.');
}
if (data.sortTransparentObjects) {
renderer.setTransparentSort(sortBackToFront);
} else {
renderer.setTransparentSort(sortRenderOrderOnly);
}
},
applyColorCorrection: function (texture) {
if (!this.data.colorManagement || !texture) {
return;
}
if (texture.isTexture && texture.colorSpace !== THREE.SRGBColorSpace) {
texture.colorSpace = THREE.SRGBColorSpace;
texture.needsUpdate = true;
}
},
setWebXRFrameRate: function (xrSession) {
var data = this.data;
var rates = xrSession.supportedFrameRates;
if (rates && xrSession.updateTargetFrameRate) {
var targetRate;
if (rates.includes(90)) {
targetRate = data.highRefreshRate ? 90 : 72;
} else {
targetRate = data.highRefreshRate ? 72 : 60;
}
xrSession.updateTargetFrameRate(targetRate).catch(function (error) {
console.warn('failed to set target frame rate of ' + targetRate + '. Error info: ' + error);
});
}
}
});
// Custom A-Frame sort functions.
// Variations of Three.js default sort orders here:
// https://github.com/mrdoob/three.js/blob/ebbaecf9acacf259ea9abdcba7b6fb25cfcea2ab/src/renderers/webgl/WebGLRenderLists.js#L1
// See: https://github.com/aframevr/aframe/issues/5332
// Default sort for opaque objects:
// - respect groupOrder & renderOrder settings
// - sort front-to-back by z-depth from camera (this should minimize overdraw)
// - otherwise leave objects in default order (object tree order)
function sortFrontToBack (a, b) {
if (a.groupOrder !== b.groupOrder) {
return a.groupOrder - b.groupOrder;
}
if (a.renderOrder !== b.renderOrder) {
return a.renderOrder - b.renderOrder;
}
return a.z - b.z;
}
// Default sort for transparent objects:
// - respect groupOrder & renderOrder settings
// - otherwise leave objects in default order (object tree order)
function sortRenderOrderOnly (a, b) {
if (a.groupOrder !== b.groupOrder) {
return a.groupOrder - b.groupOrder;
}
return a.renderOrder - b.renderOrder;
}
// Spatial sort for transparent objects:
// - respect groupOrder & renderOrder settings
// - sort back-to-front by z-depth from camera
// - otherwise leave objects in default order (object tree order)
function sortBackToFront (a, b) {
if (a.groupOrder !== b.groupOrder) {
return a.groupOrder - b.groupOrder;
}
if (a.renderOrder !== b.renderOrder) {
return a.renderOrder - b.renderOrder;
}
return b.z - a.z;
}
// exports needed for Unit Tests
module.exports.sortFrontToBack = sortFrontToBack;
module.exports.sortRenderOrderOnly = sortRenderOrderOnly;
module.exports.sortBackToFront = sortBackToFront;