[930] | 1 | //////////////////////////////////////////////////////////////////////////////////////////
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| 2 | // MATRIX4X4.cpp
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| 3 | // function definitions for 4x4 matrix class
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| 4 | // You may use this code however you wish, but if you do, please credit me and
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| 5 | // provide a link to my website in a readme file or similar
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| 6 | // Downloaded from: www.paulsprojects.net
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| 7 | // Created: 20th July 2002
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| 8 | // Updated: 19th August 2002 - Corrected 2nd SetPerspective for n!=1.0f
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| 9 | // 26th September 2002 - Added nudge to prevent artifacts with infinite far plane
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| 10 | // - Improved speed
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| 11 | // 7th November 2002 - Added Affine Inverse functions
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| 12 | // - Changed constructors
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| 13 | // - Added special cases for row3 = (0, 0, 0, 1)
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| 14 | // 17th December 2002 - Converted from radians to degrees for consistency
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| 15 | // with OpenGL. Should have been done a long time ago...
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| 16 | //////////////////////////////////////////////////////////////////////////////////////////
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| 17 | #include <memory.h>
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| 18 | #include "Maths.h"
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| 19 |
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| 20 | MATRIX4X4::MATRIX4X4(float e0, float e1, float e2, float e3,
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| 21 | float e4, float e5, float e6, float e7,
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| 22 | float e8, float e9, float e10, float e11,
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| 23 | float e12, float e13, float e14, float e15)
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| 24 | {
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| 25 | entries[0]=e0;
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| 26 | entries[1]=e1;
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| 27 | entries[2]=e2;
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| 28 | entries[3]=e3;
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| 29 | entries[4]=e4;
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| 30 | entries[5]=e5;
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| 31 | entries[6]=e6;
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| 32 | entries[7]=e7;
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| 33 | entries[8]=e8;
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| 34 | entries[9]=e9;
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| 35 | entries[10]=e10;
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| 36 | entries[11]=e11;
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| 37 | entries[12]=e12;
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| 38 | entries[13]=e13;
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| 39 | entries[14]=e14;
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| 40 | entries[15]=e15;
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| 41 | }
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| 42 |
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| 43 | MATRIX4X4::MATRIX4X4(const MATRIX4X4 & rhs)
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| 44 | {
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| 45 | memcpy(entries, rhs.entries, 16*sizeof(float));
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| 46 | }
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| 47 |
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| 48 | MATRIX4X4::MATRIX4X4(const float * rhs)
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| 49 | {
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| 50 | memcpy(entries, rhs, 16*sizeof(float));
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| 51 | }
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| 52 |
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| 53 | void MATRIX4X4::SetEntry(int position, float value)
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| 54 | {
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| 55 | if(position>=0 && position<=15)
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| 56 | entries[position]=value;
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| 57 | }
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| 58 |
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| 59 | float MATRIX4X4::GetEntry(int position) const
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| 60 | {
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| 61 | if(position>=0 && position<=15)
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| 62 | return entries[position];
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| 63 |
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| 64 | return 0.0f;
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| 65 | }
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| 66 |
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| 67 | VECTOR4D MATRIX4X4::GetRow(int position) const
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| 68 | {
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| 69 | if(position==0)
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| 70 | return VECTOR4D(entries[0], entries[4], entries[8], entries[12]);
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| 71 |
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| 72 | if(position==1)
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| 73 | return VECTOR4D(entries[1], entries[5], entries[9], entries[13]);
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| 74 |
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| 75 | if(position==2)
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| 76 | return VECTOR4D(entries[2], entries[6], entries[10], entries[14]);
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| 77 |
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| 78 | if(position==3)
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| 79 | return VECTOR4D(entries[3], entries[7], entries[11], entries[15]);
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| 80 |
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| 81 | return VECTOR4D(0.0f, 0.0f, 0.0f, 0.0f);
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| 82 | }
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| 83 |
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| 84 | VECTOR4D MATRIX4X4::GetColumn(int position) const
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| 85 | {
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| 86 | if(position==0)
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| 87 | return VECTOR4D(entries[0], entries[1], entries[2], entries[3]);
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| 88 |
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| 89 | if(position==1)
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| 90 | return VECTOR4D(entries[4], entries[5], entries[6], entries[7]);
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| 91 |
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| 92 | if(position==2)
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| 93 | return VECTOR4D(entries[8], entries[9], entries[10], entries[11]);
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| 94 |
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| 95 | if(position==3)
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| 96 | return VECTOR4D(entries[12], entries[13], entries[14], entries[15]);
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| 97 |
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| 98 | return VECTOR4D(0.0f, 0.0f, 0.0f, 0.0f);
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| 99 | }
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| 100 |
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| 101 | void MATRIX4X4::LoadIdentity(void)
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| 102 | {
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| 103 | memset(entries, 0, 16*sizeof(float));
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| 104 | entries[0]=1.0f;
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| 105 | entries[5]=1.0f;
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| 106 | entries[10]=1.0f;
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| 107 | entries[15]=1.0f;
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| 108 | }
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| 109 |
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| 110 | void MATRIX4X4::LoadZero(void)
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| 111 | {
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| 112 | memset(entries, 0, 16*sizeof(float));
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| 113 | }
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| 114 |
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| 115 | MATRIX4X4 MATRIX4X4::operator+(const MATRIX4X4 & rhs) const //overloaded operators
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| 116 | {
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| 117 | return MATRIX4X4( entries[0]+rhs.entries[0],
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| 118 | entries[1]+rhs.entries[1],
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| 119 | entries[2]+rhs.entries[2],
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| 120 | entries[3]+rhs.entries[3],
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| 121 | entries[4]+rhs.entries[4],
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| 122 | entries[5]+rhs.entries[5],
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| 123 | entries[6]+rhs.entries[6],
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| 124 | entries[7]+rhs.entries[7],
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| 125 | entries[8]+rhs.entries[8],
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| 126 | entries[9]+rhs.entries[9],
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| 127 | entries[10]+rhs.entries[10],
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| 128 | entries[11]+rhs.entries[11],
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| 129 | entries[12]+rhs.entries[12],
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| 130 | entries[13]+rhs.entries[13],
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| 131 | entries[14]+rhs.entries[14],
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| 132 | entries[15]+rhs.entries[15]);
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| 133 | }
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| 134 |
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| 135 | MATRIX4X4 MATRIX4X4::operator-(const MATRIX4X4 & rhs) const //overloaded operators
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| 136 | {
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| 137 | return MATRIX4X4( entries[0]-rhs.entries[0],
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| 138 | entries[1]-rhs.entries[1],
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| 139 | entries[2]-rhs.entries[2],
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| 140 | entries[3]-rhs.entries[3],
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| 141 | entries[4]-rhs.entries[4],
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| 142 | entries[5]-rhs.entries[5],
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| 143 | entries[6]-rhs.entries[6],
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| 144 | entries[7]-rhs.entries[7],
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| 145 | entries[8]-rhs.entries[8],
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| 146 | entries[9]-rhs.entries[9],
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| 147 | entries[10]-rhs.entries[10],
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| 148 | entries[11]-rhs.entries[11],
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| 149 | entries[12]-rhs.entries[12],
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| 150 | entries[13]-rhs.entries[13],
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| 151 | entries[14]-rhs.entries[14],
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| 152 | entries[15]-rhs.entries[15]);
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| 153 | }
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| 154 |
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| 155 | MATRIX4X4 MATRIX4X4::operator*(const MATRIX4X4 & rhs) const
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| 156 | {
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| 157 | //Optimise for matrices in which bottom row is (0, 0, 0, 1) in both matrices
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| 158 | if( entries[3]==0.0f && entries[7]==0.0f && entries[11]==0.0f && entries[15]==1.0f &&
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| 159 | rhs.entries[3]==0.0f && rhs.entries[7]==0.0f &&
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| 160 | rhs.entries[11]==0.0f && rhs.entries[15]==1.0f)
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| 161 | {
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| 162 | return MATRIX4X4( entries[0]*rhs.entries[0]+entries[4]*rhs.entries[1]+entries[8]*rhs.entries[2],
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| 163 | entries[1]*rhs.entries[0]+entries[5]*rhs.entries[1]+entries[9]*rhs.entries[2],
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| 164 | entries[2]*rhs.entries[0]+entries[6]*rhs.entries[1]+entries[10]*rhs.entries[2],
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| 165 | 0.0f,
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| 166 | entries[0]*rhs.entries[4]+entries[4]*rhs.entries[5]+entries[8]*rhs.entries[6],
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| 167 | entries[1]*rhs.entries[4]+entries[5]*rhs.entries[5]+entries[9]*rhs.entries[6],
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| 168 | entries[2]*rhs.entries[4]+entries[6]*rhs.entries[5]+entries[10]*rhs.entries[6],
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| 169 | 0.0f,
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| 170 | entries[0]*rhs.entries[8]+entries[4]*rhs.entries[9]+entries[8]*rhs.entries[10],
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| 171 | entries[1]*rhs.entries[8]+entries[5]*rhs.entries[9]+entries[9]*rhs.entries[10],
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| 172 | entries[2]*rhs.entries[8]+entries[6]*rhs.entries[9]+entries[10]*rhs.entries[10],
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| 173 | 0.0f,
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| 174 | entries[0]*rhs.entries[12]+entries[4]*rhs.entries[13]+entries[8]*rhs.entries[14]+entries[12],
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| 175 | entries[1]*rhs.entries[12]+entries[5]*rhs.entries[13]+entries[9]*rhs.entries[14]+entries[13],
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| 176 | entries[2]*rhs.entries[12]+entries[6]*rhs.entries[13]+entries[10]*rhs.entries[14]+entries[14],
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| 177 | 1.0f);
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| 178 | }
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| 179 |
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| 180 | //Optimise for when bottom row of 1st matrix is (0, 0, 0, 1)
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| 181 | if( entries[3]==0.0f && entries[7]==0.0f && entries[11]==0.0f && entries[15]==1.0f)
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| 182 | {
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| 183 | return MATRIX4X4( entries[0]*rhs.entries[0]+entries[4]*rhs.entries[1]+entries[8]*rhs.entries[2]+entries[12]*rhs.entries[3],
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| 184 | entries[1]*rhs.entries[0]+entries[5]*rhs.entries[1]+entries[9]*rhs.entries[2]+entries[13]*rhs.entries[3],
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| 185 | entries[2]*rhs.entries[0]+entries[6]*rhs.entries[1]+entries[10]*rhs.entries[2]+entries[14]*rhs.entries[3],
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| 186 | rhs.entries[3],
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| 187 | entries[0]*rhs.entries[4]+entries[4]*rhs.entries[5]+entries[8]*rhs.entries[6]+entries[12]*rhs.entries[7],
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| 188 | entries[1]*rhs.entries[4]+entries[5]*rhs.entries[5]+entries[9]*rhs.entries[6]+entries[13]*rhs.entries[7],
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| 189 | entries[2]*rhs.entries[4]+entries[6]*rhs.entries[5]+entries[10]*rhs.entries[6]+entries[14]*rhs.entries[7],
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| 190 | rhs.entries[7],
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| 191 | entries[0]*rhs.entries[8]+entries[4]*rhs.entries[9]+entries[8]*rhs.entries[10]+entries[12]*rhs.entries[11],
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| 192 | entries[1]*rhs.entries[8]+entries[5]*rhs.entries[9]+entries[9]*rhs.entries[10]+entries[13]*rhs.entries[11],
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| 193 | entries[2]*rhs.entries[8]+entries[6]*rhs.entries[9]+entries[10]*rhs.entries[10]+entries[14]*rhs.entries[11],
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| 194 | rhs.entries[11],
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| 195 | entries[0]*rhs.entries[12]+entries[4]*rhs.entries[13]+entries[8]*rhs.entries[14]+entries[12]*rhs.entries[15],
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| 196 | entries[1]*rhs.entries[12]+entries[5]*rhs.entries[13]+entries[9]*rhs.entries[14]+entries[13]*rhs.entries[15],
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| 197 | entries[2]*rhs.entries[12]+entries[6]*rhs.entries[13]+entries[10]*rhs.entries[14]+entries[14]*rhs.entries[15],
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| 198 | rhs.entries[15]);
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| 199 | }
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| 200 |
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| 201 | //Optimise for when bottom row of 2nd matrix is (0, 0, 0, 1)
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| 202 | if( rhs.entries[3]==0.0f && rhs.entries[7]==0.0f &&
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| 203 | rhs.entries[11]==0.0f && rhs.entries[15]==1.0f)
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| 204 | {
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| 205 | return MATRIX4X4( entries[0]*rhs.entries[0]+entries[4]*rhs.entries[1]+entries[8]*rhs.entries[2],
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| 206 | entries[1]*rhs.entries[0]+entries[5]*rhs.entries[1]+entries[9]*rhs.entries[2],
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| 207 | entries[2]*rhs.entries[0]+entries[6]*rhs.entries[1]+entries[10]*rhs.entries[2],
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| 208 | entries[3]*rhs.entries[0]+entries[7]*rhs.entries[1]+entries[11]*rhs.entries[2],
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| 209 | entries[0]*rhs.entries[4]+entries[4]*rhs.entries[5]+entries[8]*rhs.entries[6],
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| 210 | entries[1]*rhs.entries[4]+entries[5]*rhs.entries[5]+entries[9]*rhs.entries[6],
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| 211 | entries[2]*rhs.entries[4]+entries[6]*rhs.entries[5]+entries[10]*rhs.entries[6],
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| 212 | entries[3]*rhs.entries[4]+entries[7]*rhs.entries[5]+entries[11]*rhs.entries[6],
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| 213 | entries[0]*rhs.entries[8]+entries[4]*rhs.entries[9]+entries[8]*rhs.entries[10],
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| 214 | entries[1]*rhs.entries[8]+entries[5]*rhs.entries[9]+entries[9]*rhs.entries[10],
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| 215 | entries[2]*rhs.entries[8]+entries[6]*rhs.entries[9]+entries[10]*rhs.entries[10],
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| 216 | entries[3]*rhs.entries[8]+entries[7]*rhs.entries[9]+entries[11]*rhs.entries[10],
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| 217 | entries[0]*rhs.entries[12]+entries[4]*rhs.entries[13]+entries[8]*rhs.entries[14]+entries[12],
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| 218 | entries[1]*rhs.entries[12]+entries[5]*rhs.entries[13]+entries[9]*rhs.entries[14]+entries[13],
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| 219 | entries[2]*rhs.entries[12]+entries[6]*rhs.entries[13]+entries[10]*rhs.entries[14]+entries[14],
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| 220 | entries[3]*rhs.entries[12]+entries[7]*rhs.entries[13]+entries[11]*rhs.entries[14]+entries[15]);
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| 221 | }
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| 222 |
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| 223 | return MATRIX4X4( entries[0]*rhs.entries[0]+entries[4]*rhs.entries[1]+entries[8]*rhs.entries[2]+entries[12]*rhs.entries[3],
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| 224 | entries[1]*rhs.entries[0]+entries[5]*rhs.entries[1]+entries[9]*rhs.entries[2]+entries[13]*rhs.entries[3],
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| 225 | entries[2]*rhs.entries[0]+entries[6]*rhs.entries[1]+entries[10]*rhs.entries[2]+entries[14]*rhs.entries[3],
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| 226 | entries[3]*rhs.entries[0]+entries[7]*rhs.entries[1]+entries[11]*rhs.entries[2]+entries[15]*rhs.entries[3],
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| 227 | entries[0]*rhs.entries[4]+entries[4]*rhs.entries[5]+entries[8]*rhs.entries[6]+entries[12]*rhs.entries[7],
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| 228 | entries[1]*rhs.entries[4]+entries[5]*rhs.entries[5]+entries[9]*rhs.entries[6]+entries[13]*rhs.entries[7],
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| 229 | entries[2]*rhs.entries[4]+entries[6]*rhs.entries[5]+entries[10]*rhs.entries[6]+entries[14]*rhs.entries[7],
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| 230 | entries[3]*rhs.entries[4]+entries[7]*rhs.entries[5]+entries[11]*rhs.entries[6]+entries[15]*rhs.entries[7],
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| 231 | entries[0]*rhs.entries[8]+entries[4]*rhs.entries[9]+entries[8]*rhs.entries[10]+entries[12]*rhs.entries[11],
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| 232 | entries[1]*rhs.entries[8]+entries[5]*rhs.entries[9]+entries[9]*rhs.entries[10]+entries[13]*rhs.entries[11],
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| 233 | entries[2]*rhs.entries[8]+entries[6]*rhs.entries[9]+entries[10]*rhs.entries[10]+entries[14]*rhs.entries[11],
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| 234 | entries[3]*rhs.entries[8]+entries[7]*rhs.entries[9]+entries[11]*rhs.entries[10]+entries[15]*rhs.entries[11],
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| 235 | entries[0]*rhs.entries[12]+entries[4]*rhs.entries[13]+entries[8]*rhs.entries[14]+entries[12]*rhs.entries[15],
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| 236 | entries[1]*rhs.entries[12]+entries[5]*rhs.entries[13]+entries[9]*rhs.entries[14]+entries[13]*rhs.entries[15],
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| 237 | entries[2]*rhs.entries[12]+entries[6]*rhs.entries[13]+entries[10]*rhs.entries[14]+entries[14]*rhs.entries[15],
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| 238 | entries[3]*rhs.entries[12]+entries[7]*rhs.entries[13]+entries[11]*rhs.entries[14]+entries[15]*rhs.entries[15]);
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| 239 | }
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| 240 |
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| 241 | MATRIX4X4 MATRIX4X4::operator*(const float rhs) const
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| 242 | {
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| 243 | return MATRIX4X4( entries[0]*rhs,
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| 244 | entries[1]*rhs,
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| 245 | entries[2]*rhs,
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| 246 | entries[3]*rhs,
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| 247 | entries[4]*rhs,
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| 248 | entries[5]*rhs,
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| 249 | entries[6]*rhs,
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| 250 | entries[7]*rhs,
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| 251 | entries[8]*rhs,
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| 252 | entries[9]*rhs,
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| 253 | entries[10]*rhs,
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| 254 | entries[11]*rhs,
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| 255 | entries[12]*rhs,
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| 256 | entries[13]*rhs,
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| 257 | entries[14]*rhs,
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| 258 | entries[15]*rhs);
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| 259 | }
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| 260 |
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| 261 | MATRIX4X4 MATRIX4X4::operator/(const float rhs) const
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| 262 | {
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| 263 | if (rhs==0.0f || rhs==1.0f)
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| 264 | return (*this);
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| 265 |
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| 266 | float temp=1/rhs;
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| 267 |
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| 268 | return (*this)*temp;
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| 269 | }
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| 270 |
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| 271 | MATRIX4X4 operator*(float scaleFactor, const MATRIX4X4 & rhs)
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| 272 | {
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| 273 | return rhs*scaleFactor;
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| 274 | }
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| 275 |
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| 276 | bool MATRIX4X4::operator==(const MATRIX4X4 & rhs) const
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| 277 | {
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| 278 | for(int i=0; i<16; i++)
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| 279 | {
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| 280 | if(entries[i]!=rhs.entries[i])
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| 281 | return false;
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| 282 | }
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| 283 | return true;
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| 284 | }
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| 285 |
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| 286 | bool MATRIX4X4::operator!=(const MATRIX4X4 & rhs) const
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| 287 | {
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| 288 | return !((*this)==rhs);
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| 289 | }
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| 290 |
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| 291 | void MATRIX4X4::operator+=(const MATRIX4X4 & rhs)
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| 292 | {
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| 293 | (*this)=(*this)+rhs;
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| 294 | }
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| 295 |
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| 296 | void MATRIX4X4::operator-=(const MATRIX4X4 & rhs)
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| 297 | {
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| 298 | (*this)=(*this)-rhs;
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| 299 | }
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| 300 |
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| 301 | void MATRIX4X4::operator*=(const MATRIX4X4 & rhs)
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| 302 | {
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| 303 | (*this)=(*this)*rhs;
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| 304 | }
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| 305 |
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| 306 | void MATRIX4X4::operator*=(const float rhs)
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| 307 | {
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| 308 | (*this)=(*this)*rhs;
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| 309 | }
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| 310 |
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| 311 | void MATRIX4X4::operator/=(const float rhs)
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| 312 | {
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| 313 | (*this)=(*this)/rhs;
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| 314 | }
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| 315 |
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| 316 | MATRIX4X4 MATRIX4X4::operator-(void) const
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| 317 | {
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| 318 | MATRIX4X4 result(*this);
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| 319 |
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| 320 | for(int i=0; i<16; i++)
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| 321 | result.entries[i]=-result.entries[i];
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| 322 |
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| 323 | return result;
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| 324 | }
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| 325 |
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| 326 | VECTOR4D MATRIX4X4::operator*(const VECTOR4D rhs) const
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| 327 | {
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| 328 | //Optimise for matrices in which bottom row is (0, 0, 0, 1)
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| 329 | if(entries[3]==0.0f && entries[7]==0.0f && entries[11]==0.0f && entries[15]==1.0f)
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| 330 | {
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| 331 | return VECTOR4D(entries[0]*rhs.x
|
---|
| 332 | + entries[4]*rhs.y
|
---|
| 333 | + entries[8]*rhs.z
|
---|
| 334 | + entries[12]*rhs.w,
|
---|
| 335 |
|
---|
| 336 | entries[1]*rhs.x
|
---|
| 337 | + entries[5]*rhs.y
|
---|
| 338 | + entries[9]*rhs.z
|
---|
| 339 | + entries[13]*rhs.w,
|
---|
| 340 |
|
---|
| 341 | entries[2]*rhs.x
|
---|
| 342 | + entries[6]*rhs.y
|
---|
| 343 | + entries[10]*rhs.z
|
---|
| 344 | + entries[14]*rhs.w,
|
---|
| 345 |
|
---|
| 346 | rhs.w);
|
---|
| 347 | }
|
---|
| 348 |
|
---|
| 349 | return VECTOR4D( entries[0]*rhs.x
|
---|
| 350 | + entries[4]*rhs.y
|
---|
| 351 | + entries[8]*rhs.z
|
---|
| 352 | + entries[12]*rhs.w,
|
---|
| 353 |
|
---|
| 354 | entries[1]*rhs.x
|
---|
| 355 | + entries[5]*rhs.y
|
---|
| 356 | + entries[9]*rhs.z
|
---|
| 357 | + entries[13]*rhs.w,
|
---|
| 358 |
|
---|
| 359 | entries[2]*rhs.x
|
---|
| 360 | + entries[6]*rhs.y
|
---|
| 361 | + entries[10]*rhs.z
|
---|
| 362 | + entries[14]*rhs.w,
|
---|
| 363 |
|
---|
| 364 | entries[3]*rhs.x
|
---|
| 365 | + entries[7]*rhs.y
|
---|
| 366 | + entries[11]*rhs.z
|
---|
| 367 | + entries[15]*rhs.w);
|
---|
| 368 | }
|
---|
| 369 |
|
---|
| 370 | VECTOR3D MATRIX4X4::GetRotatedVector3D(const VECTOR3D & rhs) const
|
---|
| 371 | {
|
---|
| 372 | return VECTOR3D(entries[0]*rhs.x + entries[4]*rhs.y + entries[8]*rhs.z,
|
---|
| 373 | entries[1]*rhs.x + entries[5]*rhs.y + entries[9]*rhs.z,
|
---|
| 374 | entries[2]*rhs.x + entries[6]*rhs.y + entries[10]*rhs.z);
|
---|
| 375 | }
|
---|
| 376 |
|
---|
| 377 | VECTOR3D MATRIX4X4::GetInverseRotatedVector3D(const VECTOR3D & rhs) const
|
---|
| 378 | {
|
---|
| 379 | //rotate by transpose:
|
---|
| 380 | return VECTOR3D(entries[0]*rhs.x + entries[1]*rhs.y + entries[2]*rhs.z,
|
---|
| 381 | entries[4]*rhs.x + entries[5]*rhs.y + entries[6]*rhs.z,
|
---|
| 382 | entries[8]*rhs.x + entries[9]*rhs.y + entries[10]*rhs.z);
|
---|
| 383 | }
|
---|
| 384 |
|
---|
| 385 | VECTOR3D MATRIX4X4::GetTranslatedVector3D(const VECTOR3D & rhs) const
|
---|
| 386 | {
|
---|
| 387 | return VECTOR3D(rhs.x+entries[12], rhs.y+entries[13], rhs.z+entries[14]);
|
---|
| 388 | }
|
---|
| 389 |
|
---|
| 390 | VECTOR3D MATRIX4X4::GetInverseTranslatedVector3D(const VECTOR3D & rhs) const
|
---|
| 391 | {
|
---|
| 392 | return VECTOR3D(rhs.x-entries[12], rhs.y-entries[13], rhs.z-entries[14]);
|
---|
| 393 | }
|
---|
| 394 |
|
---|
| 395 | void MATRIX4X4::Invert(void)
|
---|
| 396 | {
|
---|
| 397 | *this=GetInverse();
|
---|
| 398 | }
|
---|
| 399 |
|
---|
| 400 | MATRIX4X4 MATRIX4X4::GetInverse(void) const
|
---|
| 401 | {
|
---|
| 402 | MATRIX4X4 result=GetInverseTranspose();
|
---|
| 403 |
|
---|
| 404 | result.Transpose();
|
---|
| 405 |
|
---|
| 406 | return result;
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 |
|
---|
| 410 | void MATRIX4X4::Transpose(void)
|
---|
| 411 | {
|
---|
| 412 | *this=GetTranspose();
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | MATRIX4X4 MATRIX4X4::GetTranspose(void) const
|
---|
| 416 | {
|
---|
| 417 | return MATRIX4X4( entries[ 0], entries[ 4], entries[ 8], entries[12],
|
---|
| 418 | entries[ 1], entries[ 5], entries[ 9], entries[13],
|
---|
| 419 | entries[ 2], entries[ 6], entries[10], entries[14],
|
---|
| 420 | entries[ 3], entries[ 7], entries[11], entries[15]);
|
---|
| 421 | }
|
---|
| 422 |
|
---|
| 423 | void MATRIX4X4::InvertTranspose(void)
|
---|
| 424 | {
|
---|
| 425 | *this=GetInverseTranspose();
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | MATRIX4X4 MATRIX4X4::GetInverseTranspose(void) const
|
---|
| 429 | {
|
---|
| 430 | MATRIX4X4 result;
|
---|
| 431 |
|
---|
| 432 | float tmp[12]; //temporary pair storage
|
---|
| 433 | float det; //determinant
|
---|
| 434 |
|
---|
| 435 | //calculate pairs for first 8 elements (cofactors)
|
---|
| 436 | tmp[0] = entries[10] * entries[15];
|
---|
| 437 | tmp[1] = entries[11] * entries[14];
|
---|
| 438 | tmp[2] = entries[9] * entries[15];
|
---|
| 439 | tmp[3] = entries[11] * entries[13];
|
---|
| 440 | tmp[4] = entries[9] * entries[14];
|
---|
| 441 | tmp[5] = entries[10] * entries[13];
|
---|
| 442 | tmp[6] = entries[8] * entries[15];
|
---|
| 443 | tmp[7] = entries[11] * entries[12];
|
---|
| 444 | tmp[8] = entries[8] * entries[14];
|
---|
| 445 | tmp[9] = entries[10] * entries[12];
|
---|
| 446 | tmp[10] = entries[8] * entries[13];
|
---|
| 447 | tmp[11] = entries[9] * entries[12];
|
---|
| 448 |
|
---|
| 449 | //calculate first 8 elements (cofactors)
|
---|
| 450 | result.SetEntry(0, tmp[0]*entries[5] + tmp[3]*entries[6] + tmp[4]*entries[7]
|
---|
| 451 | - tmp[1]*entries[5] - tmp[2]*entries[6] - tmp[5]*entries[7]);
|
---|
| 452 |
|
---|
| 453 | result.SetEntry(1, tmp[1]*entries[4] + tmp[6]*entries[6] + tmp[9]*entries[7]
|
---|
| 454 | - tmp[0]*entries[4] - tmp[7]*entries[6] - tmp[8]*entries[7]);
|
---|
| 455 |
|
---|
| 456 | result.SetEntry(2, tmp[2]*entries[4] + tmp[7]*entries[5] + tmp[10]*entries[7]
|
---|
| 457 | - tmp[3]*entries[4] - tmp[6]*entries[5] - tmp[11]*entries[7]);
|
---|
| 458 |
|
---|
| 459 | result.SetEntry(3, tmp[5]*entries[4] + tmp[8]*entries[5] + tmp[11]*entries[6]
|
---|
| 460 | - tmp[4]*entries[4] - tmp[9]*entries[5] - tmp[10]*entries[6]);
|
---|
| 461 |
|
---|
| 462 | result.SetEntry(4, tmp[1]*entries[1] + tmp[2]*entries[2] + tmp[5]*entries[3]
|
---|
| 463 | - tmp[0]*entries[1] - tmp[3]*entries[2] - tmp[4]*entries[3]);
|
---|
| 464 |
|
---|
| 465 | result.SetEntry(5, tmp[0]*entries[0] + tmp[7]*entries[2] + tmp[8]*entries[3]
|
---|
| 466 | - tmp[1]*entries[0] - tmp[6]*entries[2] - tmp[9]*entries[3]);
|
---|
| 467 |
|
---|
| 468 | result.SetEntry(6, tmp[3]*entries[0] + tmp[6]*entries[1] + tmp[11]*entries[3]
|
---|
| 469 | - tmp[2]*entries[0] - tmp[7]*entries[1] - tmp[10]*entries[3]);
|
---|
| 470 |
|
---|
| 471 | result.SetEntry(7, tmp[4]*entries[0] + tmp[9]*entries[1] + tmp[10]*entries[2]
|
---|
| 472 | - tmp[5]*entries[0] - tmp[8]*entries[1] - tmp[11]*entries[2]);
|
---|
| 473 |
|
---|
| 474 | //calculate pairs for second 8 elements (cofactors)
|
---|
| 475 | tmp[0] = entries[2]*entries[7];
|
---|
| 476 | tmp[1] = entries[3]*entries[6];
|
---|
| 477 | tmp[2] = entries[1]*entries[7];
|
---|
| 478 | tmp[3] = entries[3]*entries[5];
|
---|
| 479 | tmp[4] = entries[1]*entries[6];
|
---|
| 480 | tmp[5] = entries[2]*entries[5];
|
---|
| 481 | tmp[6] = entries[0]*entries[7];
|
---|
| 482 | tmp[7] = entries[3]*entries[4];
|
---|
| 483 | tmp[8] = entries[0]*entries[6];
|
---|
| 484 | tmp[9] = entries[2]*entries[4];
|
---|
| 485 | tmp[10] = entries[0]*entries[5];
|
---|
| 486 | tmp[11] = entries[1]*entries[4];
|
---|
| 487 |
|
---|
| 488 | //calculate second 8 elements (cofactors)
|
---|
| 489 | result.SetEntry(8, tmp[0]*entries[13] + tmp[3]*entries[14] + tmp[4]*entries[15]
|
---|
| 490 | - tmp[1]*entries[13] - tmp[2]*entries[14] - tmp[5]*entries[15]);
|
---|
| 491 |
|
---|
| 492 | result.SetEntry(9, tmp[1]*entries[12] + tmp[6]*entries[14] + tmp[9]*entries[15]
|
---|
| 493 | - tmp[0]*entries[12] - tmp[7]*entries[14] - tmp[8]*entries[15]);
|
---|
| 494 |
|
---|
| 495 | result.SetEntry(10, tmp[2]*entries[12] + tmp[7]*entries[13] + tmp[10]*entries[15]
|
---|
| 496 | - tmp[3]*entries[12] - tmp[6]*entries[13] - tmp[11]*entries[15]);
|
---|
| 497 |
|
---|
| 498 | result.SetEntry(11, tmp[5]*entries[12] + tmp[8]*entries[13] + tmp[11]*entries[14]
|
---|
| 499 | - tmp[4]*entries[12] - tmp[9]*entries[13] - tmp[10]*entries[14]);
|
---|
| 500 |
|
---|
| 501 | result.SetEntry(12, tmp[2]*entries[10] + tmp[5]*entries[11] + tmp[1]*entries[9]
|
---|
| 502 | - tmp[4]*entries[11] - tmp[0]*entries[9] - tmp[3]*entries[10]);
|
---|
| 503 |
|
---|
| 504 | result.SetEntry(13, tmp[8]*entries[11] + tmp[0]*entries[8] + tmp[7]*entries[10]
|
---|
| 505 | - tmp[6]*entries[10] - tmp[9]*entries[11] - tmp[1]*entries[8]);
|
---|
| 506 |
|
---|
| 507 | result.SetEntry(14, tmp[6]*entries[9] + tmp[11]*entries[11] + tmp[3]*entries[8]
|
---|
| 508 | - tmp[10]*entries[11] - tmp[2]*entries[8] - tmp[7]*entries[9]);
|
---|
| 509 |
|
---|
| 510 | result.SetEntry(15, tmp[10]*entries[10] + tmp[4]*entries[8] + tmp[9]*entries[9]
|
---|
| 511 | - tmp[8]*entries[9] - tmp[11]*entries[10] - tmp[5]*entries[8]);
|
---|
| 512 |
|
---|
| 513 | // calculate determinant
|
---|
| 514 | det = entries[0]*result.GetEntry(0)
|
---|
| 515 | +entries[1]*result.GetEntry(1)
|
---|
| 516 | +entries[2]*result.GetEntry(2)
|
---|
| 517 | +entries[3]*result.GetEntry(3);
|
---|
| 518 |
|
---|
| 519 | if(det==0.0f)
|
---|
| 520 | {
|
---|
| 521 | MATRIX4X4 id;
|
---|
| 522 | return id;
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | result=result/det;
|
---|
| 526 |
|
---|
| 527 | return result;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | //Invert if only composed of rotations & translations
|
---|
| 531 | void MATRIX4X4::AffineInvert(void)
|
---|
| 532 | {
|
---|
| 533 | (*this)=GetAffineInverse();
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | MATRIX4X4 MATRIX4X4::GetAffineInverse(void) const
|
---|
| 537 | {
|
---|
| 538 | //return the transpose of the rotation part
|
---|
| 539 | //and the negative of the inverse rotated translation part
|
---|
| 540 | return MATRIX4X4( entries[0],
|
---|
| 541 | entries[4],
|
---|
| 542 | entries[8],
|
---|
| 543 | 0.0f,
|
---|
| 544 | entries[1],
|
---|
| 545 | entries[5],
|
---|
| 546 | entries[9],
|
---|
| 547 | 0.0f,
|
---|
| 548 | entries[2],
|
---|
| 549 | entries[6],
|
---|
| 550 | entries[10],
|
---|
| 551 | 0.0f,
|
---|
| 552 | -(entries[0]*entries[12]+entries[1]*entries[13]+entries[2]*entries[14]),
|
---|
| 553 | -(entries[4]*entries[12]+entries[5]*entries[13]+entries[6]*entries[14]),
|
---|
| 554 | -(entries[8]*entries[12]+entries[9]*entries[13]+entries[10]*entries[14]),
|
---|
| 555 | 1.0f);
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | void MATRIX4X4::AffineInvertTranspose(void)
|
---|
| 559 | {
|
---|
| 560 | (*this)=GetAffineInverseTranspose();
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | MATRIX4X4 MATRIX4X4::GetAffineInverseTranspose(void) const
|
---|
| 564 | {
|
---|
| 565 | //return the transpose of the rotation part
|
---|
| 566 | //and the negative of the inverse rotated translation part
|
---|
| 567 | //transposed
|
---|
| 568 | return MATRIX4X4( entries[0],
|
---|
| 569 | entries[1],
|
---|
| 570 | entries[2],
|
---|
| 571 | -(entries[0]*entries[12]+entries[1]*entries[13]+entries[2]*entries[14]),
|
---|
| 572 | entries[4],
|
---|
| 573 | entries[5],
|
---|
| 574 | entries[6],
|
---|
| 575 | -(entries[4]*entries[12]+entries[5]*entries[13]+entries[6]*entries[14]),
|
---|
| 576 | entries[8],
|
---|
| 577 | entries[9],
|
---|
| 578 | entries[10],
|
---|
| 579 | -(entries[8]*entries[12]+entries[9]*entries[13]+entries[10]*entries[14]),
|
---|
| 580 | 0.0f, 0.0f, 0.0f, 1.0f);
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | void MATRIX4X4::SetTranslation(const VECTOR3D & translation)
|
---|
| 584 | {
|
---|
| 585 | LoadIdentity();
|
---|
| 586 |
|
---|
| 587 | SetTranslationPart(translation);
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | void MATRIX4X4::SetScale(const VECTOR3D & scaleFactor)
|
---|
| 591 | {
|
---|
| 592 | LoadIdentity();
|
---|
| 593 |
|
---|
| 594 | entries[0]=scaleFactor.x;
|
---|
| 595 | entries[5]=scaleFactor.y;
|
---|
| 596 | entries[10]=scaleFactor.z;
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | void MATRIX4X4::SetUniformScale(const float scaleFactor)
|
---|
| 600 | {
|
---|
| 601 | LoadIdentity();
|
---|
| 602 |
|
---|
| 603 | entries[0]=entries[5]=entries[10]=scaleFactor;
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | void MATRIX4X4::SetRotationAxis(const double angle, const VECTOR3D & axis)
|
---|
| 607 | {
|
---|
| 608 | VECTOR3D u=axis.GetNormalized();
|
---|
| 609 |
|
---|
| 610 | float sinAngle=(float)sin(M_PI*angle/180);
|
---|
| 611 | float cosAngle=(float)cos(M_PI*angle/180);
|
---|
| 612 | float oneMinusCosAngle=1.0f-cosAngle;
|
---|
| 613 |
|
---|
| 614 | LoadIdentity();
|
---|
| 615 |
|
---|
| 616 | entries[0]=(u.x)*(u.x) + cosAngle*(1-(u.x)*(u.x));
|
---|
| 617 | entries[4]=(u.x)*(u.y)*(oneMinusCosAngle) - sinAngle*u.z;
|
---|
| 618 | entries[8]=(u.x)*(u.z)*(oneMinusCosAngle) + sinAngle*u.y;
|
---|
| 619 |
|
---|
| 620 | entries[1]=(u.x)*(u.y)*(oneMinusCosAngle) + sinAngle*u.z;
|
---|
| 621 | entries[5]=(u.y)*(u.y) + cosAngle*(1-(u.y)*(u.y));
|
---|
| 622 | entries[9]=(u.y)*(u.z)*(oneMinusCosAngle) - sinAngle*u.x;
|
---|
| 623 |
|
---|
| 624 | entries[2]=(u.x)*(u.z)*(oneMinusCosAngle) - sinAngle*u.y;
|
---|
| 625 | entries[6]=(u.y)*(u.z)*(oneMinusCosAngle) + sinAngle*u.x;
|
---|
| 626 | entries[10]=(u.z)*(u.z) + cosAngle*(1-(u.z)*(u.z));
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | void MATRIX4X4::SetRotationX(const double angle)
|
---|
| 630 | {
|
---|
| 631 | LoadIdentity();
|
---|
| 632 |
|
---|
| 633 | entries[5]=(float)cos(M_PI*angle/180);
|
---|
| 634 | entries[6]=(float)sin(M_PI*angle/180);
|
---|
| 635 |
|
---|
| 636 | entries[9]=-entries[6];
|
---|
| 637 | entries[10]=entries[5];
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 | void MATRIX4X4::SetRotationY(const double angle)
|
---|
| 641 | {
|
---|
| 642 | LoadIdentity();
|
---|
| 643 |
|
---|
| 644 | entries[0]=(float)cos(M_PI*angle/180);
|
---|
| 645 | entries[2]=-(float)sin(M_PI*angle/180);
|
---|
| 646 |
|
---|
| 647 | entries[8]=-entries[2];
|
---|
| 648 | entries[10]=entries[0];
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | void MATRIX4X4::SetRotationZ(const double angle)
|
---|
| 652 | {
|
---|
| 653 | LoadIdentity();
|
---|
| 654 |
|
---|
| 655 | entries[0]=(float)cos(M_PI*angle/180);
|
---|
| 656 | entries[1]=(float)sin(M_PI*angle/180);
|
---|
| 657 |
|
---|
| 658 | entries[4]=-entries[1];
|
---|
| 659 | entries[5]=entries[0];
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | void MATRIX4X4::SetRotationEuler(const double angleX, const double angleY, const double angleZ)
|
---|
| 663 | {
|
---|
| 664 | LoadIdentity();
|
---|
| 665 |
|
---|
| 666 | SetRotationPartEuler(angleX, angleY, angleZ);
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | void MATRIX4X4::SetPerspective( float left, float right, float bottom,
|
---|
| 670 | float top, float n, float f)
|
---|
| 671 | {
|
---|
| 672 | float nudge=0.999f; //prevent artifacts with infinite far plane
|
---|
| 673 |
|
---|
| 674 | LoadZero();
|
---|
| 675 |
|
---|
| 676 | //check for division by 0
|
---|
| 677 | if(left==right || top==bottom || n==f)
|
---|
| 678 | return;
|
---|
| 679 |
|
---|
| 680 | entries[0]=(2*n)/(right-left);
|
---|
| 681 |
|
---|
| 682 | entries[5]=(2*n)/(top-bottom);
|
---|
| 683 |
|
---|
| 684 | entries[8]=(right+left)/(right-left);
|
---|
| 685 | entries[9]=(top+bottom)/(top-bottom);
|
---|
| 686 |
|
---|
| 687 | if(f!=-1)
|
---|
| 688 | {
|
---|
| 689 | entries[10]=-(f+n)/(f-n);
|
---|
| 690 | }
|
---|
| 691 | else //if f==-1, use an infinite far plane
|
---|
| 692 | {
|
---|
| 693 | entries[10]=-nudge;
|
---|
| 694 | }
|
---|
| 695 |
|
---|
| 696 | entries[11]=-1;
|
---|
| 697 |
|
---|
| 698 | if(f!=-1)
|
---|
| 699 | {
|
---|
| 700 | entries[14]=-(2*f*n)/(f-n);
|
---|
| 701 | }
|
---|
| 702 | else //if f==-1, use an infinite far plane
|
---|
| 703 | {
|
---|
| 704 | entries[14]=-2*n*nudge;
|
---|
| 705 | }
|
---|
| 706 | }
|
---|
| 707 |
|
---|
| 708 | void MATRIX4X4::SetPerspective(float fovy, float aspect, float n, float f)
|
---|
| 709 | {
|
---|
| 710 | float left, right, top, bottom;
|
---|
| 711 |
|
---|
| 712 | //convert fov from degrees to radians
|
---|
| 713 | fovy*=(float)M_PI/180;
|
---|
| 714 |
|
---|
| 715 | top=n*tanf(fovy/2.0f);
|
---|
| 716 | bottom=-top;
|
---|
| 717 |
|
---|
| 718 | left=aspect*bottom;
|
---|
| 719 | right=aspect*top;
|
---|
| 720 |
|
---|
| 721 | SetPerspective(left, right, bottom, top, n, f);
|
---|
| 722 | }
|
---|
| 723 |
|
---|
| 724 | void MATRIX4X4::SetOrtho( float left, float right, float bottom,
|
---|
| 725 | float top, float n, float f)
|
---|
| 726 | {
|
---|
| 727 | LoadIdentity();
|
---|
| 728 |
|
---|
| 729 | entries[0]=2.0f/(right-left);
|
---|
| 730 |
|
---|
| 731 | entries[5]=2.0f/(top-bottom);
|
---|
| 732 |
|
---|
| 733 | entries[10]=-2.0f/(f-n);
|
---|
| 734 |
|
---|
| 735 | entries[12]=-(right+left)/(right-left);
|
---|
| 736 | entries[13]=-(top+bottom)/(top-bottom);
|
---|
| 737 | entries[14]=-(f+n)/(f-n);
|
---|
| 738 | }
|
---|
| 739 |
|
---|
| 740 | void MATRIX4X4::SetTranslationPart(const VECTOR3D & translation)
|
---|
| 741 | {
|
---|
| 742 | entries[12]=translation.x;
|
---|
| 743 | entries[13]=translation.y;
|
---|
| 744 | entries[14]=translation.z;
|
---|
| 745 | }
|
---|
| 746 |
|
---|
| 747 | void MATRIX4X4::SetRotationPartEuler(const double angleX, const double angleY, const double angleZ)
|
---|
| 748 | {
|
---|
| 749 | double cr = cos( M_PI*angleX/180 );
|
---|
| 750 | double sr = sin( M_PI*angleX/180 );
|
---|
| 751 | double cp = cos( M_PI*angleY/180 );
|
---|
| 752 | double sp = sin( M_PI*angleY/180 );
|
---|
| 753 | double cy = cos( M_PI*angleZ/180 );
|
---|
| 754 | double sy = sin( M_PI*angleZ/180 );
|
---|
| 755 |
|
---|
| 756 | entries[0] = ( float )( cp*cy );
|
---|
| 757 | entries[1] = ( float )( cp*sy );
|
---|
| 758 | entries[2] = ( float )( -sp );
|
---|
| 759 |
|
---|
| 760 | double srsp = sr*sp;
|
---|
| 761 | double crsp = cr*sp;
|
---|
| 762 |
|
---|
| 763 | entries[4] = ( float )( srsp*cy-cr*sy );
|
---|
| 764 | entries[5] = ( float )( srsp*sy+cr*cy );
|
---|
| 765 | entries[6] = ( float )( sr*cp );
|
---|
| 766 |
|
---|
| 767 | entries[8] = ( float )( crsp*cy+sr*sy );
|
---|
| 768 | entries[9] = ( float )( crsp*sy-sr*cy );
|
---|
| 769 | entries[10] = ( float )( cr*cp );
|
---|
| 770 | }
|
---|