| 1 | /****************************************************************************** |
| 2 | * Arachnoid Graphics Plugin for Mupen64Plus |
| 3 | * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/ |
| 4 | * |
| 5 | * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | *****************************************************************************/ |
| 21 | |
| 22 | #include "RSPMatrixManager.h" |
| 23 | #include "Memory.h" |
| 24 | #include <cmath> //modff |
| 25 | #include "GBI.h" //SHIFT |
| 26 | #include "GBIDefs.h" //_FIXED2FLOAT |
| 27 | //----------------------------------------------------------------------------- |
| 28 | //! Constructor |
| 29 | //----------------------------------------------------------------------------- |
| 30 | RSPMatrixManager::RSPMatrixManager() |
| 31 | { |
| 32 | |
| 33 | } |
| 34 | |
| 35 | //----------------------------------------------------------------------------- |
| 36 | //! Destructor |
| 37 | //----------------------------------------------------------------------------- |
| 38 | RSPMatrixManager::~RSPMatrixManager() |
| 39 | { |
| 40 | |
| 41 | } |
| 42 | |
| 43 | //----------------------------------------------------------------------------- |
| 44 | //* Initialize |
| 45 | //----------------------------------------------------------------------------- |
| 46 | bool RSPMatrixManager::initialize(Memory* memory) |
| 47 | { |
| 48 | m_memory = memory; |
| 49 | m_rdramOffset = 0; |
| 50 | return true; |
| 51 | } |
| 52 | |
| 53 | //----------------------------------------------------------------------------- |
| 54 | //! Add Matrix |
| 55 | //! @param segmentAddress Later converted to RDRam address pointing to Matrix to load |
| 56 | //! @param projectionMatrix True if matrix is a projection matrix, |
| 57 | //! False if matrix is a modelview matrix |
| 58 | //! @param push True if adding a new matrix to stack(and saving the old one) |
| 59 | //! @param replace True if loading matrix (glLoadMatrix), false if multiplying with the previus matrix (glMultMatrix) |
| 60 | //----------------------------------------------------------------------------- |
| 61 | void RSPMatrixManager::addMatrix(unsigned int segmentAddress, bool projectionMatrix, bool push, bool replace) |
| 62 | { |
| 63 | unsigned int rdramAddress = m_memory->getRDRAMAddress(segmentAddress); |
| 64 | |
| 65 | if (rdramAddress + 64 > m_memory->getRDRAMSize() ) { |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | Matrix4 temp; |
| 70 | _loadMatrix(rdramAddress, temp); |
| 71 | |
| 72 | if ( projectionMatrix ) |
| 73 | { |
| 74 | _setProjection(temp, push, replace); |
| 75 | } |
| 76 | else |
| 77 | { |
| 78 | _setWorldView(temp, push, replace); |
| 79 | } |
| 80 | |
| 81 | _updateCombinedMatrix(); |
| 82 | } |
| 83 | |
| 84 | //----------------------------------------------------------------------------- |
| 85 | //! Insert Matrix |
| 86 | //----------------------------------------------------------------------------- |
| 87 | void RSPMatrixManager::insertMatrix(unsigned int where, unsigned int num) |
| 88 | { |
| 89 | float fraction, integer; |
| 90 | |
| 91 | _updateCombinedMatrix(); |
| 92 | |
| 93 | if ((where & 0x3) || (where > 0x3C)) |
| 94 | { |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | if (where < 0x20) |
| 99 | { |
| 100 | fraction = modff( m_worldProject[0][where >> 1], &integer ); |
| 101 | m_worldProject[0][where >> 1] = (short)_SHIFTR( num, 16, 16 ) + fabs( fraction ); |
| 102 | |
| 103 | fraction = modff( m_worldProject[0][(where >> 1) + 1], &integer ); |
| 104 | m_worldProject[0][(where >> 1) + 1] = (short)_SHIFTR( num, 0, 16 ) + fabs( fraction ); |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | float newValue; |
| 109 | |
| 110 | fraction = modff( m_worldProject[0][(where - 0x20) >> 1], &integer ); |
| 111 | newValue = integer + _FIXED2FLOAT( _SHIFTR( num, 16, 16 ), 16); |
| 112 | |
| 113 | // Make sure the sign isn't lost |
| 114 | if ((integer == 0.0f) && (fraction != 0.0f)) |
| 115 | newValue = newValue * (fraction / fabs( fraction )); |
| 116 | |
| 117 | m_worldProject[0][(where - 0x20) >> 1] = newValue; |
| 118 | |
| 119 | fraction = modff( m_worldProject[0][((where - 0x20) >> 1) + 1], &integer ); |
| 120 | newValue = integer + _FIXED2FLOAT( _SHIFTR( num, 0, 16 ), 16 ); |
| 121 | |
| 122 | // Make sure the sign isn't lost |
| 123 | if ((integer == 0.0f) && (fraction != 0.0f)) |
| 124 | newValue = newValue * (fraction / fabs( fraction )); |
| 125 | |
| 126 | m_worldProject[0][((where - 0x20) >> 1) + 1] = newValue; |
| 127 | } |
| 128 | } |
| 129 | void RSPMatrixManager::ForceMatrix(unsigned int rdramAddress) |
| 130 | { |
| 131 | _loadMatrix(rdramAddress, m_worldProject); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | |
| 136 | //----------------------------------------------------------------------------- |
| 137 | // Pop Matrix |
| 138 | //----------------------------------------------------------------------------- |
| 139 | void RSPMatrixManager::popMatrix() |
| 140 | { |
| 141 | if ( m_modelViewMatrixTop > 0 ) |
| 142 | { |
| 143 | m_modelViewMatrixTop--; //Pop Matrix from stack |
| 144 | } |
| 145 | |
| 146 | _updateCombinedMatrix(); |
| 147 | } |
| 148 | |
| 149 | //----------------------------------------------------------------------------- |
| 150 | // Pop Matrix N |
| 151 | //----------------------------------------------------------------------------- |
| 152 | void RSPMatrixManager::popMatrixN(unsigned int num) |
| 153 | { |
| 154 | if ( m_modelViewMatrixTop > num - 1) |
| 155 | { |
| 156 | m_modelViewMatrixTop -= num; |
| 157 | } |
| 158 | |
| 159 | _updateCombinedMatrix(); |
| 160 | } |
| 161 | |
| 162 | //----------------------------------------------------------------------------- |
| 163 | //! DMA Matrix |
| 164 | //----------------------------------------------------------------------------- |
| 165 | void RSPMatrixManager::DMAMatrix( unsigned int rdramAddress, unsigned char index, unsigned char multiply ) |
| 166 | { |
| 167 | //Get final address |
| 168 | unsigned int address = m_rdramOffset + rdramAddress; |
| 169 | |
| 170 | if (address + 64 > m_memory->getRDRAMSize()) |
| 171 | { |
| 172 | return; |
| 173 | } |
| 174 | |
| 175 | //Load Matrix from Memory |
| 176 | Matrix4 temp; |
| 177 | _loadMatrix(rdramAddress, temp); |
| 178 | |
| 179 | //Set Modelview index |
| 180 | m_modelViewMatrixTop = index; |
| 181 | |
| 182 | //FIXME: Other way around? |
| 183 | if (multiply) |
| 184 | { |
| 185 | m_modelViewMatrices[m_modelViewMatrixTop] = m_modelViewMatrices[0]; |
| 186 | m_modelViewMatrices[m_modelViewMatrixTop] = m_modelViewMatrices[m_modelViewMatrixTop] * temp; |
| 187 | } |
| 188 | else |
| 189 | { |
| 190 | m_modelViewMatrices[m_modelViewMatrixTop] = temp; |
| 191 | } |
| 192 | |
| 193 | //Set Projection Matrix to Identity |
| 194 | m_projectionMatrices[m_projectionMatrixTop] = Matrix4::IDENTITY; |
| 195 | |
| 196 | //Update Matrices |
| 197 | _updateCombinedMatrix(); |
| 198 | } |
| 199 | |
| 200 | //----------------------------------------------------------------------------- |
| 201 | //! Reset Matrices |
| 202 | //----------------------------------------------------------------------------- |
| 203 | void RSPMatrixManager::resetMatrices() |
| 204 | { |
| 205 | m_modelViewMatrices[0] = Matrix4::IDENTITY; |
| 206 | m_projectionMatrices[0] = Matrix4::IDENTITY; |
| 207 | |
| 208 | m_modelViewMatrixTop = 0; |
| 209 | m_projectionMatrixTop = 0; |
| 210 | |
| 211 | _updateCombinedMatrix(); |
| 212 | } |
| 213 | |
| 214 | //----------------------------------------------------------------------------- |
| 215 | //! Load Matrix |
| 216 | //----------------------------------------------------------------------------- |
| 217 | void RSPMatrixManager::_loadMatrix(unsigned int addr, Matrix4& out) |
| 218 | { |
| 219 | if ( addr + 64 > m_memory->getRDRAMSize() ) { |
| 220 | return; |
| 221 | } |
| 222 | |
| 223 | unsigned char* RDRAM = m_memory->getRDRAM(); |
| 224 | |
| 225 | |
| 226 | for (int i = 0; i < 4; i++) |
| 227 | { |
| 228 | for (int j = 0; j < 4; j++) |
| 229 | { |
| 230 | int hi = *(short *)(RDRAM + ((addr+(i<<3)+(j<<1) )^0x2)); |
| 231 | unsigned short lo = *(unsigned short *)(RDRAM + ((addr+(i<<3)+(j<<1) + 32)^0x2)); |
| 232 | out[i][j] = (float)((hi<<16) | (lo))/ 65536.0f; |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | //----------------------------------------------------------------------------- |
| 238 | //! Set Projection Matrix |
| 239 | //----------------------------------------------------------------------------- |
| 240 | void RSPMatrixManager::_setProjection(const Matrix4& mat, bool push, bool replace) |
| 241 | { |
| 242 | Matrix4& oldMatrix = m_projectionMatrices[m_projectionMatrixTop]; |
| 243 | |
| 244 | if (push) |
| 245 | { |
| 246 | m_projectionMatrixTop++; |
| 247 | } |
| 248 | |
| 249 | if ( replace ) |
| 250 | { |
| 251 | m_projectionMatrices[m_projectionMatrixTop] = mat; |
| 252 | } |
| 253 | else |
| 254 | { |
| 255 | m_projectionMatrices[m_projectionMatrixTop] = mat * oldMatrix; |
| 256 | } |
| 257 | |
| 258 | _updateCombinedMatrix(); |
| 259 | } |
| 260 | |
| 261 | //----------------------------------------------------------------------------- |
| 262 | //! Set World View Matrix |
| 263 | //----------------------------------------------------------------------------- |
| 264 | void RSPMatrixManager::_setWorldView(const Matrix4 & mat, bool push, bool replace) |
| 265 | { |
| 266 | Matrix4& oldMatrix = m_modelViewMatrices[m_modelViewMatrixTop]; |
| 267 | |
| 268 | if (push) |
| 269 | { |
| 270 | m_modelViewMatrixTop++; |
| 271 | } |
| 272 | |
| 273 | if ( replace ) |
| 274 | { |
| 275 | m_modelViewMatrices[m_modelViewMatrixTop] = mat; |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | m_modelViewMatrices[m_modelViewMatrixTop] = mat * oldMatrix; |
| 280 | } |
| 281 | |
| 282 | _updateCombinedMatrix(); |
| 283 | } |
| 284 | |
| 285 | //----------------------------------------------------------------------------- |
| 286 | //! Update Combined Matrix |
| 287 | //----------------------------------------------------------------------------- |
| 288 | void RSPMatrixManager::_updateCombinedMatrix() |
| 289 | { |
| 290 | m_worldProject = m_modelViewMatrices[m_modelViewMatrixTop] * m_projectionMatrices[m_projectionMatrixTop]; |
| 291 | } |