three 基础库
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( function () {
class SavePass extends THREE.Pass {
constructor( renderTarget ) {
super();
if ( THREE.CopyShader === undefined ) console.error( 'THREE.SavePass relies on THREE.CopyShader' );
const shader = THREE.CopyShader;
this.textureID = 'tDiffuse';
this.uniforms = THREE.UniformsUtils.clone( shader.uniforms );
this.material = new THREE.ShaderMaterial( {
uniforms: this.uniforms,
vertexShader: shader.vertexShader,
fragmentShader: shader.fragmentShader
} );
this.renderTarget = renderTarget;
if ( this.renderTarget === undefined ) {
this.renderTarget = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, {
minFilter: THREE.LinearFilter,
magFilter: THREE.LinearFilter,
format: THREE.RGBFormat
} );
this.renderTarget.texture.name = 'SavePass.rt';
}
this.needsSwap = false;
this.fsQuad = new THREE.FullScreenQuad( this.material );
}
render( renderer, writeBuffer, readBuffer
/*, deltaTime, maskActive */
) {
if ( this.uniforms[ this.textureID ] ) {
this.uniforms[ this.textureID ].value = readBuffer.texture;
}
renderer.setRenderTarget( this.renderTarget );
if ( this.clear ) renderer.clear();
this.fsQuad.render( renderer );
}
}
THREE.SavePass = SavePass;
} )();