// TODO: rewrite this smarter!
int CCollision::IntersectLine(vec2 Pos0, vec2 Pos1, vec2 *pOutCollision, vec2 *pOutBeforeCollision, bool AllowThrough)
{
float Distance = distance(Pos0, Pos1);
int End(Distance+1);
vec2 Last = Pos0;
int ix = 0, iy = 0; // Temporary position for checking collision
int dx = 0, dy = 0; // Offset for checking the "through" tile
if (AllowThrough)
{
ThroughOffset(Pos0, Pos1, &dx, &dy);
}
for(int i = 0; i <= End; i++)
{
float a = i/(float)End;
vec2 Pos = mix(Pos0, Pos1, a);
ix = round_to_int(Pos.x);
iy = round_to_int(Pos.y);
if((CheckPoint(ix, iy) && !(AllowThrough && IsThrough(ix + dx, iy + dy))))
{
if(pOutCollision)
*pOutCollision = Pos;
if(pOutBeforeCollision)
*pOutBeforeCollision = Last;
return GetCollisionAt(ix, iy);
}
Last = Pos;
}
if(pOutCollision)
*pOutCollision = Pos1;
if(pOutBeforeCollision)
*pOutBeforeCollision = Pos1;
return 0;
}
int CCollision::IntersectLineTeleHook(vec2 Pos0, vec2 Pos1, vec2 *pOutCollision, vec2 *pOutBeforeCollision, int *pTeleNr)
{
float Distance = distance(Pos0, Pos1);
int End(Distance+1);
vec2 Last = Pos0;
int ix = 0, iy = 0; // Temporary position for checking collision
int dx = 0, dy = 0; // Offset for checking the "through" tile
ThroughOffset(Pos0, Pos1, &dx, &dy);
for(int i = 0; i <= End; i++)
{
float a = i/(float)End;
vec2 Pos = mix(Pos0, Pos1, a);
ix = round_to_int(Pos.x);
iy = round_to_int(Pos.y);
int Index = GetPureMapIndex(Pos);
if (g_Config.m_SvOldTeleportHook)
*pTeleNr = IsTeleport(Index);
else
*pTeleNr = IsTeleportHook(Index);
if(*pTeleNr)
{
if(pOutCollision)
*pOutCollision = Pos;
if(pOutBeforeCollision)
*pOutBeforeCollision = Last;
return TILE_TELEINHOOK;
}
int hit = 0;
if(CheckPoint(ix, iy))
{
if(!IsThrough(ix, iy, dx, dy, Pos0, Pos1))
hit = GetCollisionAt(ix, iy);
}
else if(IsHookBlocker(ix, iy, Pos0, Pos1))
{
hit = TILE_NOHOOK;
}
if(hit)
{
if(pOutCollision)
*pOutCollision = Pos;
if(pOutBeforeCollision)
*pOutBeforeCollision = Last;
return hit;
}
Last = Pos;
}
if(pOutCollision)
*pOutCollision = Pos1;
if(pOutBeforeCollision)
*pOutBeforeCollision = Pos1;
return 0;
}
int CCollision::IntersectLineTeleWeapon(vec2 Pos0, vec2 Pos1, vec2 *pOutCollision, vec2 *pOutBeforeCollision, int *pTeleNr, bool AllowThrough)
{
float Distance = distance(Pos0, Pos1);
int End(Distance+1);
vec2 Last = Pos0;
int ix = 0, iy = 0; // Temporary position for checking collision
int dx = 0, dy = 0; // Offset for checking the "through" tile
if (AllowThrough)
{
ThroughOffset(Pos0, Pos1, &dx, &dy);
}
for(int i = 0; i <= End; i++)
{
float a = i/(float)End;
vec2 Pos = mix(Pos0, Pos1, a);
ix = round_to_int(Pos.x);
iy = round_to_int(Pos.y);
int Nx = clamp(ix/32, 0, m_Width-1);
int Ny = clamp(iy/32, 0, m_Height-1);
if (g_Config.m_SvOldTeleportWeapons)
*pTeleNr = IsTeleport(Ny*m_Width+Nx);
else
*pTeleNr = IsTeleportWeapon(Ny*m_Width+Nx);
if(*pTeleNr)
{
if(pOutCollision)
*pOutCollision = Pos;
if(pOutBeforeCollision)
*pOutBeforeCollision = Last;
return COLFLAG_TELE;
}
if((CheckPoint(ix, iy) && !(AllowThrough && IsThrough(ix + dx, iy + dy))))
{
if(pOutCollision)
*pOutCollision = Pos;
if(pOutBeforeCollision)
*pOutBeforeCollision = Last;
return GetCollisionAt(ix, iy);
}
Last = Pos;
}
if(pOutCollision)
*pOutCollision = Pos1;
if(pOutBeforeCollision)
*pOutBeforeCollision = Pos1;
return 0;
}