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 Vector4f extends Tuple4f { 023 024 public Vector4f() { 025 this( 0, 0, 0, 0 ); 026 } 027 028 public Vector4f( float[] x ) { 029 this.x = x[0]; 030 this.y = x[1]; 031 this.z = x[2]; 032 this.w = x[2]; 033 } 034 035 public Vector4f( float x, float y, float z, float w ) { 036 this.x = x; 037 this.y = y; 038 this.z = z; 039 this.w = w; 040 } 041 042 public Vector4f( Vector4f t ) { 043 x = t.x; 044 y = t.y; 045 z = t.z; 046 w = t.w; 047 } 048 049 public Vector4f( Tuple4f t ) { 050 x = t.x; 051 y = t.y; 052 z = t.z; 053 w = t.w; 054 } 055 056 public float dot( Vector4f v ) { 057 return v.x * x + v.y * y + v.z * z + v.w * w; 058 } 059 060 public float length() { 061 return (float)Math.sqrt( x*x+y*y+z*z+w*w ); 062 } 063 064 public void normalize() { 065 float d = 1.0f/( x*x+y*y+z*z+w*w ); 066 x *= d; 067 y *= d; 068 z *= d; 069 w *= d; 070 } 071 072}