Wolf3D-Mac/PushWall.c

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#include "wolfdef.h" #define PWALLSPEED 4 /* Micropixels per 60th of a second */ pushwall_t PushWallRec; /* Record for the single pushwall in progress */ /********************************** Set pwallychange and pwallxchange Uses pwallpos,pwalldir **********************************/ void SetPWallChange(void) { Word pos; pos = PushWallRec.pwallpos&(FRACUNIT-1); /* Get the pixel fraction */ PushWallRec.pwallxchange = 0; /* No motion yet */ PushWallRec.pwallychange = 0; switch (PushWallRec.pwalldir) { /* Which way? */ case CD_NORTH: PushWallRec.pwallychange = -pos; /* Y motion */ return; case CD_EAST: PushWallRec.pwallxchange = pos; /* X motion */ return; case CD_SOUTH: PushWallRec.pwallychange = pos; /* Y motion */ return; case CD_WEST: PushWallRec.pwallxchange = -pos; /* X motion */ } } /********************************** Marks the dest tile as blocked and begins a push wall sequence Uses pwallx,pwally,pwalldir **********************************/ void PushWallOne(void) { PushWallRec.pwallcheckx = PushWallRec.pwallx; PushWallRec.pwallchecky = PushWallRec.pwally; switch (PushWallRec.pwalldir) { case CD_NORTH: PushWallRec.pwallchecky--; break; case CD_EAST: PushWallRec.pwallcheckx++; break; case CD_SOUTH: PushWallRec.pwallchecky++; break; case CD_WEST: PushWallRec.pwallcheckx--; } tilemap[PushWallRec.pwallchecky][PushWallRec.pwallcheckx] |= TI_BLOCKMOVE | TI_BLOCKSIGHT; StartPushWall(); /* let the refresh do some junk*/ } /********************************** Initiate a pushwall sequence Call with x,y,dir of wall to push **********************************/ void PushWall(Word x,Word y,Word dir) { PlaySound(SND_PWALL); /* Play the wall sound */ PushWallRec.pwallx = x; /* Save the x,y in my globals */ PushWallRec.pwally = y; PushWallRec.pwalldir = dir; /* Save the wall direction */ PushWallOne(); /* Initiate the animation */ PushWallRec.pwallcount = 2; /* Move two cells */ ++gamestate.secretcount; /* Secret area found */ PushWallRec.pwallpos = PWALLSPEED/2; /* Begin the move */ /* mark the segs that are being moved */ tilemap[y][x] &= ~TI_PUSHWALL; /* Clear the pushwall bit */ SetPWallChange(); /* Set pwallchange */ } /********************************** Continue any pushwall animations, called by the main loop **********************************/ void MovePWalls (void) { if (!PushWallRec.pwallcount) { /* Any walls to push? */ return; /* Nope, get out */ } PushWallRec.pwallpos += PWALLSPEED*TicCount; /* Move the wall a little */ SetPWallChange(); /* Set the wall for the renderer */ if (PushWallRec.pwallpos<256) { /* Crossed a tile yet? */ return; /* Exit now */ } PushWallRec.pwallpos -= 256; /* Mark as crossed */ /* the tile can now be walked into */ tilemap[PushWallRec.pwally][PushWallRec.pwallx] &= ~TI_BLOCKMOVE; /* The movable block is gone */ AdvancePushWall(); /* Remove the bsp seg */ if (!--PushWallRec.pwallcount) { /* Been pushed 2 blocks?*/ StopSound(SND_PWALL); /* Play the wall sound */ PlaySound(SND_PWALL2); /* Play the wall stop sound */ return; /* Don't do this anymore! */ } PushWallRec.pwallx = PushWallRec.pwallcheckx; /* Set the tile to the next cell */ PushWallRec.pwally = PushWallRec.pwallchecky; PushWallOne(); /* Push one more record */ }