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WebGLRenderer: Refactor creation of transmission render target. #23450

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Feb 10, 2022
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WebGLRenderer: Refactor creation of transmission render target. #23450

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e5f40e5
WebGLRenderer: Refactor creation of transmission render target.
Mugen87 Feb 10, 2022
1dd18b6
Docs: Improve MeshPhysicalMaterial page.
Mugen87 Feb 10, 2022
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4 changes: 3 additions & 1 deletion docs/api/en/materials/MeshPhysicalMaterial.html
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Original file line number Diff line number Diff line change
Expand Up @@ -188,7 +188,9 @@ <h3>[property:Float transmission]</h3>

The transmission property can be used to model these materials.<br />

When transmission is non-zero, [page:Material.opacity opacity] should be set to *1*.
When transmission is non-zero, [page:Material.opacity opacity] should be set to *1*.<br />

This feature can only be used with a WebGL 2 rendering context.
</p>

<h3>[property:Texture transmissionMap]</h3>
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4 changes: 3 additions & 1 deletion docs/api/zh/materials/MeshPhysicalMaterial.html
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Expand Up @@ -184,7 +184,9 @@ <h3>[property:Float transmission]</h3>

The transmission property can be used to model these materials.<br />

When transmission is non-zero, [page:Material.opacity opacity] should be set to *1*.
When transmission is non-zero, [page:Material.opacity opacity] should be set to *1*.<br />

This feature can only be used with a WebGL 2 rendering context.
</p>

<h3>[property:Texture transmissionMap]</h3>
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32 changes: 21 additions & 11 deletions src/renderers/WebGLRenderer.js
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Expand Up @@ -9,12 +9,11 @@ import {
UnsignedByteType,
LinearEncoding,
NoToneMapping,
LinearMipmapLinearFilter,
NearestFilter,
ClampToEdgeWrapping
LinearMipmapLinearFilter
} from '../constants.js';
import { Frustum } from '../math/Frustum.js';
import { Matrix4 } from '../math/Matrix4.js';
import { Vector2 } from '../math/Vector2.js';
import { Vector3 } from '../math/Vector3.js';
import { Vector4 } from '../math/Vector4.js';
import { WebGLAnimation } from './webgl/WebGLAnimation.js';
Expand Down Expand Up @@ -170,6 +169,7 @@ function WebGLRenderer( parameters = {} ) {

const _projScreenMatrix = new Matrix4();

const _vector2 = new Vector2();
const _vector3 = new Vector3();

const _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };
Expand Down Expand Up @@ -1184,23 +1184,33 @@ function WebGLRenderer( parameters = {} ) {

function renderTransmissionPass( opaqueObjects, scene, camera ) {

if ( capabilities.isWebGL2 === false ) {

console.error( 'THREE.WebGLRenderer: Transmission can only be used with WebGL 2.' );
return;

}

if ( _transmissionRenderTarget === null ) {

const needsAntialias = _antialias === true && capabilities.isWebGL2 === true;
const renderTargetType = needsAntialias ? WebGLMultisampleRenderTarget : WebGLRenderTarget;
const renderTargetType = ( _antialias === true ) ? WebGLMultisampleRenderTarget : WebGLRenderTarget;

_transmissionRenderTarget = new renderTargetType( 1024, 1024, {
_transmissionRenderTarget = new renderTargetType( 1, 1, {
generateMipmaps: true,
type: utils.convert( HalfFloatType ) !== null ? HalfFloatType : UnsignedByteType,
type: HalfFloatType,
minFilter: LinearMipmapLinearFilter,
magFilter: NearestFilter,
wrapS: ClampToEdgeWrapping,
wrapT: ClampToEdgeWrapping,
useRenderToTexture: extensions.has( 'WEBGL_multisampled_render_to_texture' )
} );

}

// set size of transmission render target to half size of drawing buffer

_this.getDrawingBufferSize( _vector2 ).multiplyScalar( 0.5 ).floor();
_transmissionRenderTarget.setSize( _vector2.x, _vector2.y );

//

const currentRenderTarget = _this.getRenderTarget();
_this.setRenderTarget( _transmissionRenderTarget );
_this.clear();
Expand Down Expand Up @@ -1786,7 +1796,7 @@ function WebGLRenderer( parameters = {} ) {
// are midframe flushes and an external depth buffer. Disable use of the extension.
if ( renderTarget.useRenderToTexture ) {

console.warn( 'render-to-texture extension was disabled because an external texture was provided' );
console.warn( 'THREE.WebGLRenderer: Render-to-texture extension was disabled because an external texture was provided' );
renderTarget.useRenderToTexture = false;
renderTarget.useRenderbuffer = true;

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