(Tutorial) DarkOne's textured floor/ceiling for 4GW

by **Officer-M. John (Admin)** on Thu Jun 01, 2017 9:55 am

You like use DarkOne's textured floor/ceiling for 4GW too? You try with original DOS code? Now thet released for 4GW too. It is 4GW version and works.

Original code tutorial for DOS:http://diehardwolfers.areyep.com/viewtopic.php?t=1575
Modified code tutorial for SDL:http://wolf3dfanboys.usersboard.com/t130-tutorial-darkone-s-textured-floor-ceiling-for-sdl#508

4GW version:

WL_DRAW.CPP:

Code:: int wallheight[MAXVIEWWIDTH],min_wallheight;

Under Texture floor/ceiling function and VGAClearScreen part:

Code:: #define USE_TEX(page) (0x0000|(page)) /* ** use USE_TEX(n) to use floor/ceiling textures for given level ** n should be 1..255 !!! ** it is MAP-ID (from FloEdit). First texture goes to floor, second to ceiling */ // ------------------------- * Textured flats * ------------------------- /* ** Draw Textured Floor/Ceiling (DarkOne) */ void DrawFlats(unsigned tex_f, unsigned tex_c) { int x, y, y0, halfheight; unsigned top_offset0, bot_offset0, top_offset, bot_offset; unsigned top_add, bot_add; byte p, color; byte far *src_top, far *src_bot; fixed dist; // distance to row projection fixed tex_step; // global step per one screen pixel fixed gu, gv, du, dv; // global texture coordinates int u, v; // local texture coordinates int flatx,flaty; unsigned curfloortex, lastflattex; unsigned curceiltex; // ------ * prepare * -------- halfheight=viewheight>>1; y0=min_wallheight>>3; // starting y value if(y0>halfheight) return; // view obscued by walls if(y0==0) y0=1; // don't let division by zero top_offset0=80*(halfheight-y0-1); // and will decrease by 80 each row bot_offset0=80*(halfheight+y0); // and will increase by 80 each row lastflattex=-1; // draw horizontal lines for(p=0; p<4; p++) { _asm{ mov eax,0x0102 mov cl,[p] shl ah,cl mov edx,0x3c4 out dx,ax } for(y=y0, top_offset=top_offset0, bot_offset=bot_offset0; y<halfheight; y++, top_offset-=80, bot_offset+=80) { dist=(heightnumerator/y)<<5; gu= viewx+FixedMul(dist, viewcos); gv=-viewy+FixedMul(dist, viewsin); tex_step=(dist<<8)/viewwidth/175; du= FixedMul(tex_step, viewsin); dv=-FixedMul(tex_step, viewcos); gu-=((viewwidth>>1)-p)*du; gv-=((viewwidth>>1)-p)*dv; // starting point (leftmost) du<<=2; // 4pix step dv<<=2; for(x=p, top_add=top_offset, bot_add=bot_offset; x<viewwidth; x+=4, top_add++, bot_add++) { if(wallheight[x]>>3<=y) { flatx = (gu>>TILESHIFT)&63; flaty = (-(gv>>TILESHIFT)-1)&63; curfloortex=tex_f; curceiltex=tex_c; if (curfloortex != lastflattex) { lastflattex=curfloortex; src_top=Pages+(curceiltex<<12); src_bot=Pages+(curfloortex<<12); } u=(gu>>10)&63; v=(gv>>10)&63; color=*(src_top+((63-u)<<6)+(63-v)); // draw top pixel using <color> _asm { mov edi,[vbuf] add edi,[top_add] mov al,[color] mov es:[edi],al } color=*(src_bot+(u<<6)+(63-v)); // draw bottom pixel using <color> _asm { mov edi,[vbuf] add edi,[bot_add] mov al,[color] mov es:[edi],al } } gu+=du; gv+=dv; } } } } #define USE_TEX(page) (0x0000|(page)) unsigned vgaCeiling[]= { #ifndef SPEAR // 1 2 3 4 5 6 7 8 9 B D // alte erste Zeile 0x9e9e,0x1d1d,0xdddd,0x1d1d,0x1e1e,0xd7d7,0xdede,0x9e9e,0x1d1d,0x1c1c,0x6565, USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(17),USE_TEX(12),USE_TEX(17),USE_TEX(17),USE_TEX(19), USE_TEX(24),USE_TEX(24),USE_TEX(24),USE_TEX(24),USE_TEX(24),USE_TEX(19),USE_TEX(12),USE_TEX(12),USE_TEX(15),USE_TEX(8), USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(17),USE_TEX(12),USE_TEX(12),USE_TEX(12),USE_TEX(8), USE_TEX(17),USE_TEX(8),USE_TEX(17),USE_TEX(12),USE_TEX(29),USE_TEX(8),USE_TEX(17),USE_TEX(24),USE_TEX(35),USE_TEX(29), USE_TEX(35),USE_TEX(35),USE_TEX(35),USE_TEX(35),USE_TEX(12),USE_TEX(29),USE_TEX(35),USE_TEX(35),USE_TEX(35),USE_TEX(17), USE_TEX(17),USE_TEX(35),USE_TEX(35),USE_TEX(35),USE_TEX(35),USE_TEX(29),USE_TEX(29),USE_TEX(29),USE_TEX(29),USE_TEX(17) #else USE_TEX(54),USE_TEX(24),USE_TEX(12),USE_TEX(63),USE_TEX(50),USE_TEX(17),USE_TEX(8),USE_TEX(8),USE_TEX(8),USE_TEX(8), USE_TEX(35),USE_TEX(44),USE_TEX(29),USE_TEX(17),USE_TEX(12),USE_TEX(50),USE_TEX(50),USE_TEX(42),USE_TEX(63),USE_TEX(54),USE_TEX(56) #endif }; /* ===================== = = VGAClearScreen = ===================== */ void VGAClearScreen (unsigned ceiling) { //unsigned ceiling=vgaCeiling[gamestate.episode*10+mapon]; ceiling|=ceiling<<16; _asm { cli mov edx,SC_INDEX mov eax,SC_MAPMASK+15*256 out dx,ax sti mov edx,80 mov ebx,[viewwidth] shr ebx,2 sub edx,ebx shr ebx,2 mov bh,byte ptr [viewheight] shr bh,1 mov edi,[vbuf] mov eax,[ceiling] xor ecx,ecx toploop: mov cl,bl rep stosd add edi,edx dec bh jnz toploop mov bh,byte ptr [viewheight] shr bh,1 mov eax,0x19191919 bottomloop: mov cl,bl rep stosd add edi,edx dec bh jnz bottomloop } }

So you modify in ThreeDRefresh:

Code:: /* ======================== = = ThreeDRefresh = ======================== */ void ThreeDRefresh (void) { unsigned ceiling; boolean flats; // // clear out the traced array // memset(spotvis,0,maparea); spotvis[player->tilex][player->tiley] = 1; // Detect all sprites over player fix vbuf+=screenofs; // // follow the walls from there to the right, drawwing as we go // ceiling=vgaCeiling[gamestate.episode*10+mapon]; if((ceiling>>8)==(ceiling&0xFF)) { VGAClearScreen(ceiling); flats=false; } else { flats=true; ceiling=((ceiling&0xFF)-1)<<1; } WallRefresh (); if(flats) DrawFlats(ceiling, ceiling+1); // draw textured floor/ceiling // // draw all the scaled images // playy=(player->y+FixedMul(0x7300,viewsin)); playx=(player->x-FixedMul(0x7300,viewcos)); DrawScaleds(); // draw scaled stuff DrawPlayerWeapon (); // draw player's hands // // show screen and time last cycle // if (fizzlein) { FizzleFade((long)vbuf-0xa0000,(long)vdisp-0xa0000+screenofs,viewwidth,viewheight,20,false); fizzlein = false; lasttimecount = TimeCount = 0; // don't make a big tic count } vbuf-=screenofs; vdisp=vbuf; _asm { cli mov edx,0x3d4 mov al,0x0c out dx,al inc edx mov al,byte ptr vdisp+1 out dx,al sti } vbuf+=SCREENSIZE; if((long)vbuf > 0xa0000+PAGE3START) vbuf=(byte *) 0xa0000; #ifndef REMDEBUG if (fpscounter) { fps_frames++; fps_time+=tics; if(fps_time>35) { fps_time-=35; fps=fps_frames<<1; fps_frames=0; } fontnumber = 0; SETFONTCOLOR(7,127); PrintX=8; PrintY=190; VWB_Bar(2,189,50,10,bordercol); US_PrintSigned(fps); US_Print(" fps"); } #endif }