51 lines
970 B
JavaScript
51 lines
970 B
JavaScript
|
import { BufferGeometry, Float32BufferAttribute, Mesh, OrthographicCamera } from 'three';
|
||
|
|
|
||
|
|
// Helper for passes that need to fill the viewport with a single quad.
|
||
|
|
|
||
|
|
const _camera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
|
||
|
|
|
||
|
|
// https://github.com/mrdoob/three.js/pull/21358
|
||
|
|
|
||
|
|
class QuadGeometry extends BufferGeometry {
|
||
|
|
|
||
|
|
constructor( flipY = false ) {
|
||
|
|
|
||
|
|
super();
|
||
|
|
|
||
|
|
const uv = flipY === false ? [ 0, - 1, 0, 1, 2, 1 ] : [ 0, 2, 0, 0, 2, 0 ];
|
||
|
|
|
||
|
|
this.setAttribute( 'position', new Float32BufferAttribute( [ - 1, 3, 0, - 1, - 1, 0, 3, - 1, 0 ], 3 ) );
|
||
|
|
this.setAttribute( 'uv', new Float32BufferAttribute( uv, 2 ) );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const _geometry = new QuadGeometry();
|
||
|
|
|
||
|
|
class QuadMesh extends Mesh {
|
||
|
|
|
||
|
|
constructor( material = null ) {
|
||
|
|
|
||
|
|
super( _geometry, material );
|
||
|
|
|
||
|
|
this.camera = _camera;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
renderAsync( renderer ) {
|
||
|
|
|
||
|
|
return renderer.renderAsync( this, _camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
render( renderer ) {
|
||
|
|
|
||
|
|
renderer.render( this, _camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
export default QuadMesh;
|