three.fbo-helper
Version:
FrameBuffer Object inspector for three.js
94 lines (62 loc) • 2.27 kB
JavaScript
import { Box3 } from '../../math/Box3';
import { LineSegments } from '../../objects/LineSegments';
import { LineBasicMaterial } from '../../materials/LineBasicMaterial';
import { BufferAttribute } from '../../core/BufferAttribute';
import { BufferGeometry } from '../../core/BufferGeometry';
/**
* @author mrdoob / http://mrdoob.com/
*/
function BoxHelper( object, color ) {
if ( color === undefined ) color = 0xffff00;
var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
var positions = new Float32Array( 8 * 3 );
var geometry = new BufferGeometry();
geometry.setIndex( new BufferAttribute( indices, 1 ) );
geometry.addAttribute( 'position', new BufferAttribute( positions, 3 ) );
LineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );
if ( object !== undefined ) {
this.update( object );
}
}
BoxHelper.prototype = Object.create( LineSegments.prototype );
BoxHelper.prototype.constructor = BoxHelper;
BoxHelper.prototype.update = ( function () {
var box = new Box3();
return function update( object ) {
if ( (object && object.isBox3) ) {
box.copy( object );
} else {
box.setFromObject( object );
}
if ( box.isEmpty() ) return;
var min = box.min;
var max = box.max;
/*
5____4
1/___0/|
| 6__|_7
2/___3/
0: max.x, max.y, max.z
1: min.x, max.y, max.z
2: min.x, min.y, max.z
3: max.x, min.y, max.z
4: max.x, max.y, min.z
5: min.x, max.y, min.z
6: min.x, min.y, min.z
7: max.x, min.y, min.z
*/
var position = this.geometry.attributes.position;
var array = position.array;
array[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;
array[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;
array[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;
array[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;
array[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;
array[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;
array[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;
array[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;
position.needsUpdate = true;
this.geometry.computeBoundingSphere();
};
} )();
export { BoxHelper };