//
// FWallCoords :: Init
//
// Transform and clip coordinates. Returns true if it was clipped away
//
bool FWallCoords::Init(int x1, int y1, int x2, int y2, int too_close)
{
tx1 = DMulScale20(x1, viewsin, -y1, viewcos);
tx2 = DMulScale20(x2, viewsin, -y2, viewcos);
ty1 = DMulScale20(x1, viewtancos, y1, viewtansin);
ty2 = DMulScale20(x2, viewtancos, y2, viewtansin);
if (MirrorFlags & RF_XFLIP)
{
int t = 256 - tx1;
tx1 = 256 - tx2;
tx2 = t;
swapvalues(ty1, ty2);
}
if (tx1 >= -ty1)
{
if (tx1 > ty1) return true; // left edge is off the right side
if (ty1 == 0) return true;
sx1 = (centerxfrac + Scale(tx1, centerxfrac, ty1)) >> FRACBITS;
if (tx1 >= 0) sx1 = MIN(viewwidth, sx1+1); // fix for signed divide
sz1 = ty1;
}
else
{
if (tx2 < -ty2) return true; // wall is off the left side
void R_AddLine (seg_t *line)
{
static sector_t tempsec; // killough 3/8/98: ceiling/water hack
bool solid;
fixed_t tx1, tx2, ty1, ty2;
curline = line;
// [RH] Color if not texturing line
dc_color = (((int)(line - segs) * 8) + 4) & 255;
tx1 = line->v1->x - viewx;
tx2 = line->v2->x - viewx;
ty1 = line->v1->y - viewy;
ty2 = line->v2->y - viewy;
// Reject lines not facing viewer
if (DMulScale32 (ty1, tx1-tx2, tx1, ty2-ty1) >= 0)
return;
WallTX1 = DMulScale20 (tx1, viewsin, -ty1, viewcos);
WallTX2 = DMulScale20 (tx2, viewsin, -ty2, viewcos);
WallTY1 = DMulScale20 (tx1, viewtancos, ty1, viewtansin);
WallTY2 = DMulScale20 (tx2, viewtancos, ty2, viewtansin);
if (MirrorFlags & RF_XFLIP)
{
int t = 256-WallTX1;
WallTX1 = 256-WallTX2;
WallTX2 = t;
swap (WallTY1, WallTY2);
}
if (WallTX1 >= -WallTY1)
{
if (WallTX1 > WallTY1) return; // left edge is off the right side
if (WallTY1 == 0) return;
WallSX1 = (centerxfrac + Scale (WallTX1, centerxfrac, WallTY1)) >> FRACBITS;
if (WallTX1 >= 0) WallSX1 = MIN (viewwidth, WallSX1+1); // fix for signed divide
WallSZ1 = WallTY1;
}
else
{
if (WallTX2 < -WallTY2) return; // wall is off the left side
