70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
import {
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BufferGeometry,
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Float32BufferAttribute
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} from 'three';
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class BoxLineGeometry extends BufferGeometry {
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constructor( width = 1, height = 1, depth = 1, widthSegments = 1, heightSegments = 1, depthSegments = 1 ) {
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super();
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widthSegments = Math.floor( widthSegments );
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heightSegments = Math.floor( heightSegments );
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depthSegments = Math.floor( depthSegments );
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const widthHalf = width / 2;
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const heightHalf = height / 2;
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const depthHalf = depth / 2;
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const segmentWidth = width / widthSegments;
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const segmentHeight = height / heightSegments;
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const segmentDepth = depth / depthSegments;
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const vertices = [];
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let x = - widthHalf;
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let y = - heightHalf;
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let z = - depthHalf;
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for ( let i = 0; i <= widthSegments; i ++ ) {
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vertices.push( x, - heightHalf, - depthHalf, x, heightHalf, - depthHalf );
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vertices.push( x, heightHalf, - depthHalf, x, heightHalf, depthHalf );
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vertices.push( x, heightHalf, depthHalf, x, - heightHalf, depthHalf );
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vertices.push( x, - heightHalf, depthHalf, x, - heightHalf, - depthHalf );
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x += segmentWidth;
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}
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for ( let i = 0; i <= heightSegments; i ++ ) {
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vertices.push( - widthHalf, y, - depthHalf, widthHalf, y, - depthHalf );
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vertices.push( widthHalf, y, - depthHalf, widthHalf, y, depthHalf );
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vertices.push( widthHalf, y, depthHalf, - widthHalf, y, depthHalf );
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vertices.push( - widthHalf, y, depthHalf, - widthHalf, y, - depthHalf );
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y += segmentHeight;
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}
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for ( let i = 0; i <= depthSegments; i ++ ) {
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vertices.push( - widthHalf, - heightHalf, z, - widthHalf, heightHalf, z );
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vertices.push( - widthHalf, heightHalf, z, widthHalf, heightHalf, z );
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vertices.push( widthHalf, heightHalf, z, widthHalf, - heightHalf, z );
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vertices.push( widthHalf, - heightHalf, z, - widthHalf, - heightHalf, z );
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z += segmentDepth;
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}
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this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
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}
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}
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export { BoxLineGeometry };
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