//------------------------------------------------------------------------- /* Copyright (C) 1997, 2005 - 3D Realms Entertainment This file is part of Shadow Warrior version 1.2 Shadow Warrior is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Original Source: 1997 - Frank Maddin and Jim Norwood Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms */ //------------------------------------------------------------------------- #include "ns.h" #include "compat.h" #include "pragmas.h" #include "interp.h" BEGIN_SW_NS #define MAXINTERPOLATIONS 1024 int numinterpolations = 0; int oldipos[MAXINTERPOLATIONS]; int bakipos[MAXINTERPOLATIONS]; int *curipos[MAXINTERPOLATIONS]; void setinterpolation(int *posptr) { int i; if (numinterpolations >= MAXINTERPOLATIONS) return; for (i = numinterpolations - 1; i >= 0; i--) { if (curipos[i] == posptr) return; } curipos[numinterpolations] = posptr; oldipos[numinterpolations] = *posptr; numinterpolations++; } void stopinterpolation(int *posptr) { int i; for (i = numinterpolations - 1; i >= 0; i--) { if (curipos[i] == posptr) { numinterpolations--; oldipos[i] = oldipos[numinterpolations]; bakipos[i] = bakipos[numinterpolations]; curipos[i] = curipos[numinterpolations]; } } } void updateinterpolations(void) // Stick at beginning of domovethings { int i; for (i = numinterpolations - 1; i >= 0; i--) oldipos[i] = *curipos[i]; } // must call restore for every do interpolations // make sure you don't exit void dointerpolations(int smoothratio) // Stick at beginning of drawscreen { int i, j, odelta, ndelta; ndelta = 0; j = 0; for (i = numinterpolations - 1; i >= 0; i--) { bakipos[i] = *curipos[i]; odelta = ndelta; ndelta = (*curipos[i]) - oldipos[i]; if (odelta != ndelta) j = mulscale16(ndelta, smoothratio); *curipos[i] = oldipos[i] + j; } } void restoreinterpolations(void) // Stick at end of drawscreen { int i; for (i = numinterpolations - 1; i >= 0; i--) *curipos[i] = bakipos[i]; } END_SW_NS