//
// IsOpenDoor
// This function is pretty obsolete now, since doors get replaced by zeros in the
// map when open and with DOOR_INDEX when closed
//
bool Raycaster::IsOpenDoor()
{
static int doorX, doorY;
int i;
for(i=0; i<1; i++)
{
switch(i)
{
case 0:
doorX = (int)posX;
doorY = (int)posY;
break;
case 1:
doorX = (int)(posX+MIN_WALL_DIST);
doorY = (int)(posY+MIN_WALL_DIST);
break;
case 2:
doorX = (int)(posX-MIN_WALL_DIST);
doorY = (int)(posY-MIN_WALL_DIST);
break;
case 3:
doorX = (int)(posX+MIN_WALL_DIST);
doorY = (int)posY;
break;
case 4:
doorX = (int)posX;
doorY = (int)(posY+MIN_WALL_DIST);
break;
case 5:
doorX = (int)posX;
doorY = (int)(posY-MIN_WALL_DIST);
break;
case 6:
doorX = (int)(posX-MIN_WALL_DIST);
doorY = (int)(posY);
break;
}
if(map[doorY][doorX] == DOOR_INDEX)
{
Door *door = GetDoorAt(doorX, doorY);
if(door->IsOpen() && !door->GetClosing())
return true;
}
}
return false;
}
//
// CastThroughIntersections
//
float Raycaster::CastThroughIntersections(float angle, IntersectionDir dir, int *texIndex, float *texelX)
{
float fx, fy;
float dx, dy;
float distance;
float a, b;
int mapX, mapY;
switch(dir)
{
case ID_HORIZONTAL:
if(UP(angle))
{
fy = -(posY - (int)posY);
dy = -1;
}
else
{
fy = (int)posY + 1 - posY;
dy = 1;
}
fx = (float)(ABS(fy)) / (float)(TAN(angle));
dx = (float)(ABS(dy)) / (float)(TAN(angle));
fx = ABS(fx);
dx = ABS(dx);
if(LEFT(angle))
{
dx = -dx;
fx = -fx;
}
fx = posX + fx;
fy = posY + fy;
break;
case ID_VERTICAL:
if(LEFT(angle))
{
fx = -(posX - (int)posX);
dx = -1;
}
else
{
fx = (int)posX + 1 - posX;
dx = 1;
}
fy = (float)(TAN(angle)) * (float)(ABS(fx));
dy = (float)(TAN(angle)) * (float)(ABS(dx));
fy = ABS(fy);
dy = ABS(dy);
if(UP(angle))
{
fy = -fy;
dy = -dy;
}
fx = posX + fx;
fy = posY + fy;
break;
}
while(true)
{
mapY = (int)fy;
mapX = (int)fx;
if(dy == -1 && dir == ID_HORIZONTAL)
mapY -= 1;
else if(dx == -1 && dir == ID_VERTICAL)
mapX -= 1;
if(mapX < 0 || mapY < 0 || mapX >= mapW || mapY >= mapH)
break;
else if(map[mapY][mapX] > 0 && map[mapY][mapX] != DOOR_INDEX && map[mapY][mapX] != LOCKED_DOOR_INDEX)
{
hit:
if(dir == ID_HORIZONTAL)
*texelX = fx - (float)mapX;
else
*texelX = fy - (float)mapY;
*texIndex = map[mapY][mapX] - 1;
break;
}
else if(map[mapY][mapX] == DOOR_INDEX || map[mapY][mapX] == LOCKED_DOOR_INDEX)
{
Door *door = GetDoorAt(mapX, mapY);
if(door->GetOpening() || door->GetClosing())
{
float xval;
if(dir == ID_HORIZONTAL)
xval = fx - (float)mapX;
else
xval = fy - (float)mapY;
if(door->GetOpenedWidth() < xval)
goto hit;
}
else if(!door->IsOpen())
goto hit;
}
fx += dx;
fy += dy;
}
a = ABS((fy - posY));
b = ABS((fx - posX));
distance = sqrt(a*a+b*b);
return distance;
}