short
SoundAngle(int x, int y)
{
extern short screenpeek;
short angle, delta_angle;
angle = getangle(x - Player[screenpeek].posx, y - Player[screenpeek].posy);
delta_angle = GetDeltaAngle(angle, Player[screenpeek].pang);
// convert a delta_angle to a real angle if negative
if (delta_angle < 0)
delta_angle = NORM_ANGLE((1024 + delta_angle) + 1024);
// convert 2048 degree angle to 32 degree angle
return delta_angle >> 6;
}
int WallBreakPosition(short hitwall, short *sectnum, long *x, long *y, long *z, short *ang)
{
short w,nw;
WALLp wp;
long nx,ny;
short wall_ang;
long ret=0;
w = hitwall;
wp = &wall[w];
nw = wall[w].point2;
wall_ang = NORM_ANGLE(getangle(wall[nw].x - wall[w].x, wall[nw].y - wall[w].y)+512);
*sectnum = SectorOfWall(w);
ASSERT(*sectnum >= 0);
// midpoint of wall
*x = DIV2(wall[w].x + wall[w].x);
*y = DIV2(wall[w].y + wall[w].y);
//getzsofsector(*sectnum, *x, *y, cz, fz);
if (wp->nextwall < 0)
{
// white wall
*z = DIV2(sector[*sectnum].floorz + sector[*sectnum].ceilingz);
}
else
{
short next_sectnum = wp->nextsector;
// red wall
ASSERT(wp->nextsector >= 0);
// floor and ceiling meet
if (sector[next_sectnum].floorz == sector[next_sectnum].ceilingz)
*z = DIV2(sector[*sectnum].floorz + sector[*sectnum].ceilingz);
else
// floor is above other sector
if (sector[next_sectnum].floorz < sector[*sectnum].floorz)
*z = DIV2(sector[next_sectnum].floorz + sector[*sectnum].floorz);
else
// ceiling is below other sector
if (sector[next_sectnum].ceilingz > sector[*sectnum].ceilingz)
*z = DIV2(sector[next_sectnum].ceilingz + sector[*sectnum].ceilingz);
}
*ang = wall_ang;
nx = MOVEx(128, wall_ang);
ny = MOVEy(128, wall_ang);
*x += nx;
*y += ny;
updatesectorz(*x,*y,*z,sectnum);
if (*sectnum < 0)
{
*x = MAXLONG; // don't spawn shrap, just change wall
return(FALSE);
}
return(TRUE);
}
