three 基础库
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( function () {
/**
* RGB Halftone pass for three.js effects composer. Requires THREE.HalftoneShader.
*/
class HalftonePass extends THREE.Pass {
constructor( width, height, params ) {
super();
if ( THREE.HalftoneShader === undefined ) {
console.error( 'THREE.HalftonePass requires THREE.HalftoneShader' );
}
this.uniforms = THREE.UniformsUtils.clone( THREE.HalftoneShader.uniforms );
this.material = new THREE.ShaderMaterial( {
uniforms: this.uniforms,
fragmentShader: THREE.HalftoneShader.fragmentShader,
vertexShader: THREE.HalftoneShader.vertexShader
} ); // set params
this.uniforms.width.value = width;
this.uniforms.height.value = height;
for ( const key in params ) {
if ( params.hasOwnProperty( key ) && this.uniforms.hasOwnProperty( key ) ) {
this.uniforms[ key ].value = params[ key ];
}
}
this.fsQuad = new THREE.FullScreenQuad( this.material );
}
render( renderer, writeBuffer, readBuffer
/*, deltaTime, maskActive*/
) {
this.material.uniforms[ 'tDiffuse' ].value = readBuffer.texture;
if ( this.renderToScreen ) {
renderer.setRenderTarget( null );
this.fsQuad.render( renderer );
} else {
renderer.setRenderTarget( writeBuffer );
if ( this.clear ) renderer.clear();
this.fsQuad.render( renderer );
}
}
setSize( width, height ) {
this.uniforms.width.value = width;
this.uniforms.height.value = height;
}
}
THREE.HalftonePass = HalftonePass;
} )();