spine-runtimes/spine-ts/webgl/src/Vector3.ts

/******************************************************************************
 * Spine Runtimes Software License v2.5
 * 
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 * 
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
 * non-transferable license to use, install, execute, and perform the Spine
 * Runtimes software and derivative works solely for personal or internal
 * use. Without the written permission of Esoteric Software (see Section 2 of
 * the Spine Software License Agreement), you may not (a) modify, translate,
 * adapt, or develop new applications using the Spine Runtimes or otherwise
 * create derivative works or improvements of the Spine Runtimes or (b) remove,
 * delete, alter, or obscure any trademarks or any copyright, trademark, patent,
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 * 
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module spine.webgl {
	export class Vector3 {
		x = 0;
		y = 0;
		z = 0;

		constructor (x: number = 0, y: number = 0, z: number = 0) {
			this.x = x;
			this.y = y;
			this.z = z;
		}

		setFrom(v: Vector3): Vector3 {
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			return this;
		}

		set (x: number, y: number, z: number): Vector3 {
			this.x = x;
			this.y = y;
			this.z = z;
			return this;
		}

		add (v: Vector3): Vector3 {
			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			return this;
		}

		sub (v: Vector3): Vector3 {
			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			return this;
		}

		scale (s: number): Vector3 {
			this.x *= s;
			this.y *= s;
			this.z *= s;
			return this;
		}

		normalize (): Vector3 {
			let len = this.length();
			if (len == 0) return this;
			len = 1 / len;
			this.x *= len;
			this.y *= len;
			this.z *= len;
			return this;
		}

		cross (v: Vector3): Vector3 {
			return this.set(this.y * v.z - this.z * v.y, this.z * v.x - this.x * v.z, this.x * v.y - this.y * v.x)
		}

		multiply (matrix: Matrix4): Vector3 {
			let l_mat = matrix.values;
			return this.set(this.x * l_mat[M00] + this.y * l_mat[M01] + this.z * l_mat[M02] + l_mat[M03],
				this.x * l_mat[M10] + this.y * l_mat[M11] + this.z * l_mat[M12] + l_mat[M13],
				this.x * l_mat[M20] + this.y * l_mat[M21] + this.z * l_mat[M22] + l_mat[M23]);
		}

		project (matrix: Matrix4): Vector3 {
			let l_mat = matrix.values;
			let l_w = 1 / (this.x * l_mat[M30] + this.y * l_mat[M31] + this.z * l_mat[M32] + l_mat[M33]);
			return this.set((this.x * l_mat[M00] + this.y * l_mat[M01] + this.z * l_mat[M02] + l_mat[M03]) * l_w,
				(this.x * l_mat[M10] + this.y * l_mat[M11] + this.z * l_mat[M12] + l_mat[M13]) * l_w,
				(this.x * l_mat[M20] + this.y * l_mat[M21] + this.z * l_mat[M22] + l_mat[M23]) * l_w);
		}

		dot (v: Vector3): number {
			return this.x * v.x + this.y * v.y + this.z * v.z;
		}

		length (): number {
			return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
		}

		distance (v: Vector3): number {
			let a = v.x - this.x;
			let b = v.y - this.y;
			let c = v.z - this.z;
			return Math.sqrt(a * a + b * b + c * c);
		}
	}
}