001/* 002Copyright 2006 Jerry Huxtable 003 004Licensed under the Apache License, Version 2.0 (the "License"); 005you may not use this file except in compliance with the License. 006You may obtain a copy of the License at 007 008 http://www.apache.org/licenses/LICENSE-2.0 009 010Unless required by applicable law or agreed to in writing, software 011distributed under the License is distributed on an "AS IS" BASIS, 012WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013See the License for the specific language governing permissions and 014limitations under the License. 015*/ 016 017package com.jhlabs.vecmath; 018 019/** 020 * Vector math package, converted to look similar to javax.vecmath. 021 */ 022public class Vector3f extends Tuple3f { 023 024 public Vector3f() { 025 this( 0, 0, 0 ); 026 } 027 028 public Vector3f( float[] x ) { 029 this.x = x[0]; 030 this.y = x[1]; 031 this.z = x[2]; 032 } 033 034 public Vector3f( float x, float y, float z ) { 035 this.x = x; 036 this.y = y; 037 this.z = z; 038 } 039 040 public Vector3f( Vector3f t ) { 041 this.x = t.x; 042 this.y = t.y; 043 this.z = t.z; 044 } 045 046 public Vector3f( Tuple3f t ) { 047 this.x = t.x; 048 this.y = t.y; 049 this.z = t.z; 050 } 051 052 public float angle( Vector3f v ) { 053 return (float)Math.acos( dot(v) / (length()*v.length()) ); 054 } 055 056 public float dot( Vector3f v ) { 057 return v.x * x + v.y * y + v.z * z; 058 } 059 060 public void cross( Vector3f v1, Vector3f v2 ) { 061 x = v1.y * v2.z - v1.z * v2.y; 062 y = v1.z * v2.x - v1.x * v2.z; 063 z = v1.x * v2.y - v1.y * v2.x; 064 } 065 066 public float length() { 067 return (float)Math.sqrt( x*x+y*y+z*z ); 068 } 069 070 public void normalize() { 071 float d = 1.0f/(float)Math.sqrt( x*x+y*y+z*z ); 072 x *= d; 073 y *= d; 074 z *= d; 075 } 076 077}