96 lines
2.3 KiB
JavaScript
96 lines
2.3 KiB
JavaScript
/**
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* @author mrdoob / http://mrdoob.com/
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* @author Mugen87 / http://github.com/Mugen87
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* @author Hectate / http://www.github.com/Hectate
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*/
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import { LineSegments } from '../objects/LineSegments.js';
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import { VertexColors } from '../constants.js';
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import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
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import { Float32BufferAttribute } from '../core/BufferAttribute.js';
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import { BufferGeometry } from '../core/BufferGeometry.js';
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import { Color } from '../math/Color.js';
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function PolarGridHelper( radius, radials, circles, divisions, color1, color2 ) {
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radius = radius || 10;
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radials = radials || 16;
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circles = circles || 8;
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divisions = divisions || 64;
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color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
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color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
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var vertices = [];
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var colors = [];
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var x, z;
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var v, i, j, r, color;
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// create the radials
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for ( i = 0; i <= radials; i ++ ) {
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v = ( i / radials ) * ( Math.PI * 2 );
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x = Math.sin( v ) * radius;
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z = Math.cos( v ) * radius;
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vertices.push( 0, 0, 0 );
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vertices.push( x, 0, z );
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color = ( i & 1 ) ? color1 : color2;
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colors.push( color.r, color.g, color.b );
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colors.push( color.r, color.g, color.b );
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}
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// create the circles
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for ( i = 0; i <= circles; i ++ ) {
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color = ( i & 1 ) ? color1 : color2;
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r = radius - ( radius / circles * i );
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for ( j = 0; j < divisions; j ++ ) {
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// first vertex
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v = ( j / divisions ) * ( Math.PI * 2 );
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x = Math.sin( v ) * r;
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z = Math.cos( v ) * r;
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vertices.push( x, 0, z );
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colors.push( color.r, color.g, color.b );
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// second vertex
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v = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );
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x = Math.sin( v ) * r;
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z = Math.cos( v ) * r;
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vertices.push( x, 0, z );
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colors.push( color.r, color.g, color.b );
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}
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}
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var geometry = new BufferGeometry();
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geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
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geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
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var material = new LineBasicMaterial( { vertexColors: VertexColors } );
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LineSegments.call( this, geometry, material );
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}
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PolarGridHelper.prototype = Object.create( LineSegments.prototype );
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PolarGridHelper.prototype.constructor = PolarGridHelper;
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export { PolarGridHelper };
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