import Geometry from '../Geometry';
import BoundingBox from '../math/BoundingBox';
/**
* @constructor clay.geometry.Plane
* @extends clay.Geometry
* @param {Object} [opt]
* @param {number} [opt.widthSegments]
* @param {number} [opt.heightSegments]
*/
var Plane = Geometry.extend(
/** @lends clay.geometry.Plane# */
{
dynamic: false,
/**
* @type {number}
*/
widthSegments: 1,
/**
* @type {number}
*/
heightSegments: 1
}, function() {
this.build();
},
/** @lends clay.geometry.Plane.prototype */
{
/**
* Build plane geometry
*/
build: function() {
var heightSegments = this.heightSegments;
var widthSegments = this.widthSegments;
var attributes = this.attributes;
var positions = [];
var texcoords = [];
var normals = [];
var faces = [];
for (var y = 0; y <= heightSegments; y++) {
var t = y / heightSegments;
for (var x = 0; x <= widthSegments; x++) {
var s = x / widthSegments;
positions.push([2 * s - 1, 2 * t - 1, 0]);
Eif (texcoords) {
texcoords.push([s, t]);
}
Eif (normals) {
normals.push([0, 0, 1]);
}
if (x < widthSegments && y < heightSegments) {
var i = x + y * (widthSegments + 1);
faces.push([i, i + 1, i + widthSegments + 1]);
faces.push([i + widthSegments + 1, i + 1, i + widthSegments + 2]);
}
}
}
attributes.position.fromArray(positions);
attributes.texcoord0.fromArray(texcoords);
attributes.normal.fromArray(normals);
this.initIndicesFromArray(faces);
this.boundingBox = new BoundingBox();
this.boundingBox.min.set(-1, -1, 0);
this.boundingBox.max.set(1, 1, 0);
}
});
export default Plane;
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