fireball/lib/helpers/GridHelper.js
2018-12-25 17:29:22 +03:30

53 lines
1.6 KiB
JavaScript

/**
* @author mrdoob / http://mrdoob.com/
*/
import { LineSegments } from '../objects/LineSegments.js';
import { VertexColors } from '../constants.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { Color } from '../math/Color.js';
function GridHelper( size, divisions, color1, color2 ) {
size = size || 10;
divisions = divisions || 10;
color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
var center = divisions / 2;
var step = size / divisions;
var halfSize = size / 2;
var vertices = [], colors = [];
for ( var i = 0, j = 0, k = - halfSize; i <= divisions; i ++, k += step ) {
vertices.push( - halfSize, 0, k, halfSize, 0, k );
vertices.push( k, 0, - halfSize, k, 0, halfSize );
var color = i === center ? color1 : color2;
color.toArray( colors, j ); j += 3;
color.toArray( colors, j ); j += 3;
color.toArray( colors, j ); j += 3;
color.toArray( colors, j ); j += 3;
}
var geometry = new BufferGeometry();
geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
var material = new LineBasicMaterial( { vertexColors: VertexColors } );
LineSegments.call( this, geometry, material );
}
GridHelper.prototype = Object.create( LineSegments.prototype );
GridHelper.prototype.constructor = GridHelper;
export { GridHelper };