| import { BufferGeometry } from '../core/BufferGeometry.js'; |
| import { Float32BufferAttribute } from '../core/BufferAttribute.js'; |
|
|
| class PlaneGeometry extends BufferGeometry { |
|
|
| constructor( width = 1, height = 1, widthSegments = 1, heightSegments = 1 ) { |
|
|
| super(); |
|
|
| this.type = 'PlaneGeometry'; |
|
|
| this.parameters = { |
| width: width, |
| height: height, |
| widthSegments: widthSegments, |
| heightSegments: heightSegments |
| }; |
|
|
| const width_half = width / 2; |
| const height_half = height / 2; |
|
|
| const gridX = Math.floor( widthSegments ); |
| const gridY = Math.floor( heightSegments ); |
|
|
| const gridX1 = gridX + 1; |
| const gridY1 = gridY + 1; |
|
|
| const segment_width = width / gridX; |
| const segment_height = height / gridY; |
|
|
| |
|
|
| const indices = []; |
| const vertices = []; |
| const normals = []; |
| const uvs = []; |
|
|
| for ( let iy = 0; iy < gridY1; iy ++ ) { |
|
|
| const y = iy * segment_height - height_half; |
|
|
| for ( let ix = 0; ix < gridX1; ix ++ ) { |
|
|
| const x = ix * segment_width - width_half; |
|
|
| vertices.push( x, - y, 0 ); |
|
|
| normals.push( 0, 0, 1 ); |
|
|
| uvs.push( ix / gridX ); |
| uvs.push( 1 - ( iy / gridY ) ); |
|
|
| } |
|
|
| } |
|
|
| for ( let iy = 0; iy < gridY; iy ++ ) { |
|
|
| for ( let ix = 0; ix < gridX; ix ++ ) { |
|
|
| const a = ix + gridX1 * iy; |
| const b = ix + gridX1 * ( iy + 1 ); |
| const c = ( ix + 1 ) + gridX1 * ( iy + 1 ); |
| const d = ( ix + 1 ) + gridX1 * iy; |
|
|
| indices.push( a, b, d ); |
| indices.push( b, c, d ); |
|
|
| } |
|
|
| } |
|
|
| this.setIndex( indices ); |
| this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) ); |
| this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) ); |
| this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) ); |
|
|
| } |
|
|
| copy( source ) { |
|
|
| super.copy( source ); |
|
|
| this.parameters = Object.assign( {}, source.parameters ); |
|
|
| return this; |
|
|
| } |
|
|
| static fromJSON( data ) { |
|
|
| return new PlaneGeometry( data.width, data.height, data.widthSegments, data.heightSegments ); |
|
|
| } |
|
|
| } |
|
|
| export { PlaneGeometry }; |
|
|
