[SDL tutorial] Transparent ceilings...

Some of you have already seen this in DHW before but I decided to post it here aswell...
In this tutorial I help you to create transparent ceilings (like in the Lair of Mantis - of coursre
my routine might differ a lot from the one theJosh used)...

Open wl_floorceiling.cpp and change the very end of the file from this:

Code:


              if (curbottex != lastbottex)

                    {

                        lastbottex = curbottex;

                        bottex = PM_GetTexture(curbottex);

                    }

                    u = (gu >> (TILESHIFT - TEXTURESHIFT)) & (TEXTURESIZE - 1);

                    v = (gv >> (TILESHIFT - TEXTURESHIFT)) & (TEXTURESIZE - 1);

                    unsigned texoffs = (u << TEXTURESHIFT) + (TEXTURESIZE - 1) - v;

#ifdef USE_SHADING

                    if(curtoptex)

                        vbuf[top_add] = curshades[toptex[texoffs]];

                    if(curbottex)

                        vbuf[bot_add] = curshades[bottex[texoffs]];

#else

                    if(curtoptex)

                        vbuf[top_add] = toptex[texoffs];

                    if(curbottex)

                        vbuf[bot_add] = bottex[texoffs];

#endif

                }

            }

            gu += du;

            gv += dv;

        }

    }

}



and replace it with this:

Code:



                    if (curbottex != lastbottex)

                    {

                        lastbottex = curbottex;

                        bottex = PM_GetTexture(curbottex);

                    }

                    u = (gu >> (TILESHIFT - TEXTURESHIFT)) & (TEXTURESIZE - 1);

                    v = (gv >> (TILESHIFT - TEXTURESHIFT)) & (TEXTURESIZE - 1);

                    unsigned texoffs = (u << TEXTURESHIFT) + (TEXTURESIZE - 1) - v;
                // Get tranparent:
                    byte color1=*(toptex+texoffs);
                    byte color2=*(bottex+texoffs);
               

#ifdef USE_SHADING

                    if(curtoptex){
                        if (color1 != 0xff)
                            vbuf[top_add] = curshades[toptex[texoffs]];

                    }

                    if(curbottex){
                      if (color2 != 0xff)
                          vbuf[bot_add] = curshades[bottex[texoffs]];

                    }
#else
                    if(curtoptex)
                      if (color1 != 0xff)
                          vbuf[top_add] = toptex[texoffs];

                    if(curbottex)
                      if (color2 != 0xff)
                          vbuf[bot_add] = bottex[texoffs];

#endif

                }

            }

            gu += du;

            gv += dv;

        }

    }

}

#endif



Hey, how about a screenshot of the new effects?

I try to post one later this evening...

WLHack wrote: transparent ceilings (like in the Lair of Mantis - of coursre
my routine might differ a lot from the one theJosh used)...

I used code by Alumiun for transparent ceilings in my mod, He posted a tutorial on it a while ago at dhw somewhere, if you can find it, that's what my routine looks like

Ah, that one... I tried it out but it didn't seem to do anything (or I just implemented it wrong)...