void DBaseDecal::Spread (const FDecalTemplate *tpl, side_t *wall, fixed_t x, fixed_t y, fixed_t z, F3DFloor * ffloor)
{
FTexture *tex;
vertex_t *v1;
fixed_t rorg, ldx, ldy;
GetWallStuff (wall, v1, ldx, ldy);
rorg = Length (x - v1->x, y - v1->y);
tex = TexMan[PicNum];
int dwidth = tex->GetWidth ();
DecalWidth = dwidth * ScaleX;
DecalLeft = tex->LeftOffset * ScaleX;
DecalRight = DecalWidth - DecalLeft;
SpreadSource = this;
SpreadTemplate = tpl;
SpreadZ = z;
// Try spreading left first
SpreadLeft (rorg - DecalLeft, v1, wall, ffloor);
SpreadStack.Clear ();
// Then try spreading right
SpreadRight (rorg + DecalRight, wall,
Length (wall->linedef->dx, wall->linedef->dy), ffloor);
SpreadStack.Clear ();
}
void DBaseDecal::Spread (const FDecalTemplate *tpl, side_t *wall, double x, double y, double z, F3DFloor * ffloor)
{
FTexture *tex;
vertex_t *v1;
double rorg, ldx, ldy;
GetWallStuff (wall, v1, ldx, ldy);
rorg = Length (x - v1->fX(), y - v1->fY());
if ((tex = TexMan[PicNum]) == NULL)
{
return;
}
int dwidth = tex->GetWidth ();
DecalWidth = dwidth * ScaleX;
DecalLeft = tex->LeftOffset * ScaleX;
DecalRight = DecalWidth - DecalLeft;
SpreadSource = this;
SpreadTemplate = tpl;
SpreadZ = z;
// Try spreading left first
SpreadLeft (rorg - DecalLeft, v1, wall, ffloor);
SpreadStack.Clear ();
// Then try spreading right
SpreadRight (rorg + DecalRight, wall,
Length (wall->linedef->Delta().X, wall->linedef->Delta().Y), ffloor);
SpreadStack.Clear ();
}
void DBaseDecal::SpreadLeft (fixed_t r, vertex_t *v1, side_t *feelwall, F3DFloor *ffloor)
{
fixed_t ldx, ldy;
SpreadStack.Push (feelwall);
while (r < 0 && feelwall->LeftSide != NO_SIDE)
{
fixed_t startr = r;
fixed_t x = v1->x;
fixed_t y = v1->y;
feelwall = &sides[feelwall->LeftSide];
GetWallStuff (feelwall, v1, ldx, ldy);
fixed_t wallsize = Length (ldx, ldy);
r += DecalLeft;
x += Scale (r, ldx, wallsize);
y += Scale (r, ldy, wallsize);
r = wallsize + startr;
SpreadSource->CloneSelf (SpreadTemplate, x, y, SpreadZ, feelwall, ffloor);
SpreadStack.Push (feelwall);
side_t *nextwall = NextWall (feelwall);
if (nextwall != NULL && nextwall->LeftSide != NO_SIDE)
{
int i;
for (i = SpreadStack.Size(); i-- > 0; )
{
if (SpreadStack[i] == nextwall)
break;
}
if (i == -1)
{
vertex_t *v2;
GetWallStuff (nextwall, v2, ldx, ldy);
SpreadLeft (startr, v2, nextwall, ffloor);
}
}
}
}
void DBaseDecal::SpreadLeft (double r, vertex_t *v1, side_t *feelwall, F3DFloor *ffloor)
{
double ldx, ldy;
SpreadStack.Push (feelwall);
while (r < 0 && feelwall->LeftSide != NO_SIDE)
{
double startr = r;
double x = v1->fX();
double y = v1->fY();
feelwall = &level.sides[feelwall->LeftSide];
GetWallStuff (feelwall, v1, ldx, ldy);
double wallsize = Length (ldx, ldy);
r += DecalLeft;
x += r*ldx / wallsize;
y += r*ldy / wallsize;
r = wallsize + startr;
SpreadSource->CloneSelf (SpreadTemplate, x, y, SpreadZ, feelwall, ffloor);
SpreadStack.Push (feelwall);
side_t *nextwall = NextWall (feelwall);
if (nextwall != NULL && nextwall->LeftSide != NO_SIDE)
{
int i;
for (i = SpreadStack.Size(); i-- > 0; )
{
if (SpreadStack[i] == nextwall)
break;
}
if (i == -1)
{
vertex_t *v2;
GetWallStuff (nextwall, v2, ldx, ldy);
SpreadLeft (startr, v2, nextwall, ffloor);
}
}
}
}
void DBaseDecal::SpreadRight (fixed_t r, side_t *feelwall, fixed_t wallsize, F3DFloor *ffloor)
{
vertex_t *v1;
fixed_t x, y, ldx, ldy;
SpreadStack.Push (feelwall);
while (r > wallsize && feelwall->RightSide != NO_SIDE)
{
feelwall = &sides[feelwall->RightSide];
side_t *nextwall = NextWall (feelwall);
if (nextwall != NULL && nextwall->LeftSide != NO_SIDE)
{
int i;
for (i = SpreadStack.Size(); i-- > 0; )
{
if (SpreadStack[i] == nextwall)
break;
}
if (i == -1)
{
SpreadRight (r, nextwall, wallsize, ffloor);
}
}
r = DecalWidth - r + wallsize - DecalLeft;
GetWallStuff (feelwall, v1, ldx, ldy);
x = v1->x;
y = v1->y;
wallsize = Length (ldx, ldy);
x -= Scale (r, ldx, wallsize);
y -= Scale (r, ldy, wallsize);
r = DecalRight - r;
SpreadSource->CloneSelf (SpreadTemplate, x, y, SpreadZ, feelwall, ffloor);
SpreadStack.Push (feelwall);
}
}
