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Rev 109 Rev 272
Line 147... Line 147...
147 
    mov eax,[vpx]
 147 
    mov eax,[vpx]
148 
    mov ebx,[vpy]
 148 
    mov ebx,[vpy]
Line 149... Line 149...
149
149 
 
150
150 
 
151 
    mov ecx,[vheading]
 151 
    mov ecx,[vheading]
- 
 
 152 
;    imul ecx,4
152 
    imul ecx,4
 153 
;    add ecx,sinus
Line 153... Line 154...
153 
    add ecx,sinus
 154 
    lea ecx, [sinus+ecx*4]
154 
    mov edi,[ecx]
 155 
    mov edi,[ecx]
155
156 
 
156 
    mov edx,[vheading]
 157 
    mov edx,[vheading]
- 
 
 158 
;    imul edx,4
157 
    imul edx,4
 159 
;    add edx,sinus
158 
    add edx,sinus
 160 
;    add edx,3600
159 
    add edx,3600
 161 
    lea edx, [sinus+3600+edx*4]
160 
    cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
 162 
    cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
161 
    jb ok200
 163 
    jb ok200
Line 171... Line 173...
171 
    mov esi,ebx ; newPy / ffff
 173 
    mov esi,ebx ; newPy / ffff
172 
    sar edi,16
 174 
    sar edi,16
173 
    sar esi,16
 175 
    sar esi,16
174 
    mov ecx,esi
 176 
    mov ecx,esi
175 
    sal ecx,5 ; equal *32
 177 
    sal ecx,5 ; equal *32
176 
    add ecx,edi
 178 
;    add ecx,edi
177 
    add ecx,grid
 179 
;    add ecx,grid
- 
 
 180 
    lea ecx, [grid+ecx+edi]
178 
    cmp [ecx],byte 0  ; collision check
 181 
    cmp [ecx],byte 0  ; collision check
179 
    jne cannotwalk0
 182 
    jne cannotwalk0
180 
    mov [vpx],eax
 183 
    mov [vpx],eax
181 
    mov [vpy],ebx
 184 
    mov [vpy],ebx
182 
    mov [mouseya],dword 1 ; set refresh flag
 185 
    mov [mouseya],dword 1 ; set refresh flag
Line 186... Line 189...
186 
s_down:                    ; walk backward
 189 
s_down:                    ; walk backward
187 
    mov eax,[vpx]
 190 
    mov eax,[vpx]
188 
    mov ebx,[vpy]
 191 
    mov ebx,[vpy]
Line 189... Line 192...
189
192 
 
190 
    mov ecx,[vheading]
 193 
    mov ecx,[vheading]
191 
    imul ecx,4
 194 
;    imul ecx,4
- 
 
 195 
;    add ecx,sinus
192 
    add ecx,sinus
 196 
    lea ecx, [sinus+ecx*4]
Line 193... Line 197...
193 
    mov edi,[ecx]
 197 
    mov edi,[ecx]
194
198 
 
195 
    mov edx,[vheading]
 199 
    mov edx,[vheading]
196 
    imul edx,4
 200 
;    imul edx,4
- 
 
 201 
;    add edx,sinus
197 
    add edx,sinus
 202 
;    add edx,3600
198 
    add edx,3600
 203 
    lea edx, [sinus+3600+edx*4]
199 
    cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
 204 
    cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
200 
    jb ok201
 205 
    jb ok201
Line 211... Line 216...
211 
    mov esi,ebx ; newPy / ffff
 216 
    mov esi,ebx ; newPy / ffff
212 
    sar edi,16
 217 
    sar edi,16
213 
    sar esi,16
 218 
    sar esi,16
214 
    mov ecx,esi
 219 
    mov ecx,esi
215 
    sal ecx,5
 220 
    sal ecx,5
216 
    add ecx,edi
 221 
;    add ecx,edi
217 
    add ecx,grid
 222 
;    add ecx,grid
- 
 
 223 
    lea ecx, [grid+ecx+edi]
218 
    cmp [ecx],byte 0
 224 
    cmp [ecx],byte 0
219 
    jne cannotwalk1
 225 
    jne cannotwalk1
220 
    mov [vpx],eax
 226 
    mov [vpx],eax
221 
    mov [vpy],ebx
 227 
    mov [vpy],ebx
222 
    mov [mouseya],dword 1
 228 
    mov [mouseya],dword 1
Line 361... Line 367...
361 
    jb ok2
 367 
    jb ok2
362 
    sub edx,3600
 368 
    sub edx,3600
363 
ok2:
 369 
ok2:
Line 364... Line 370...
364
370 
 
365 
; get stepx and stepy
 371 
; get stepx and stepy
366 
    mov ecx,edx
 372 
;    mov ecx,edx
367 
    imul ecx,4
 373 
;    imul ecx,4
- 
 
 374 
;    add ecx,sinus     ; pointer to stepx
368 
    add ecx,sinus     ; pointer to stepx
 375 
    lea ecx, [sinus+edx*4]
369 
    mov esi,[ecx]
 376 
    mov esi,[ecx]
370 
    sar esi,4         ; accuracy
 377 
    sar esi,4         ; accuracy
Line 371... Line 378...
371 
    mov [vstepx],esi  ; store stepx
 378 
    mov [vstepx],esi  ; store stepx
372
379 
 
373 
    mov esi,edx
 380 
;    mov esi,edx
374 
    imul esi,4
 381 
;    imul esi,4
- 
 
 382 
;    add esi,sinus  ; pointer to stepy
375 
    add esi,sinus  ; pointer to stepy
 383 
;    add esi,3600
376 
    add esi,3600
 384 
    lea esi, [sinus+3600+edx*4]
377 
    cmp esi,eosinus ;cosinus taken from ((sinus plus 900) mod 3600)
 385 
    cmp esi,eosinus ;cosinus taken from ((sinus plus 900) mod 3600)
378 
    jb ok202
 386 
    jb ok202
Line 457... Line 465...
457
465 
 
458 
    mov edi,[yfrac] ; get pixel color of this floor pixel
 466 
    mov edi,[yfrac] ; get pixel color of this floor pixel
459 
    sal edi,8
 467 
    sal edi,8
460 
    mov esi,[xfrac]
 468 
    mov esi,[xfrac]
461 
    sal esi,2
 469 
    sal esi,2
462 
    add edi,esi
 470 
;    add edi,esi
- 
 
 471 
;    add edi,wall ; in fact its floor, just using the wall texture :)
- 
 
 472 
    lea edi, [wall+edi+esi]
463 
    add edi,wall ; in fact its floor, just using the wall texture :)
 473 
 
464 
    mov edx,[edi]
 474 
    mov edx,[edi]
Line 465... Line 475...
465 
    mov [remesi],esi
 475 
    mov [remesi],esi
466
476 
 
467 
    ;**** calculate pixel adress:****
 477 
    ;**** calculate pixel adress:****
468 
    mov esi,[ytemp]
 478 
    mov esi,[ytemp]
469 
    add esi,240
 479 
    add esi,240
470 
    imul esi,1920
 480 
    imul esi,1920
471 
    add esi,[vx1]
 481 
;    add esi,[vx1]
472 
    add esi,[vx1]
 482 
;    add esi,[vx1]
- 
 
 483 
;    add esi,[vx1]
- 
 
 484 
;    add esi,0x80000
- 
 
 485 
    mov eax, [vx1]
Line 473... Line 486...
473 
    add esi,[vx1]
 486 
    lea eax, [eax+eax*2]
474 
    add esi,0x80000
 487 
    lea esi, [0x80000+eax+esi]
475
488 
 
476 
    cmp esi,0x80000+1920*480
 489 
    cmp esi,0x80000+1920*480
Line 586... Line 599...
586 
    mov [vpyi],ebx
 599 
    mov [vpyi],ebx
Line 587... Line 600...
587
600 
 
588 
    mov edx,ebx
 601 
    mov edx,ebx
589 
;    imul edx,32
 602 
;    imul edx,32
590 
    shl edx,5
 603 
    shl edx,5
591 
    add edx,grid
 604 
;    add edx,grid
- 
 
 605 
;    add edx,eax
- 
 
 606 
    lea edx, [grid+edx+eax]
592 
    add edx,eax
 607 
 
593 
    cmp [edx],byte 0   ; raycaster reached a wall? (0=no)
 608 
    cmp [edx],byte 0   ; raycaster reached a wall? (0=no)
594 
    jne getout
 609 
    jne getout
595 
    cmp edi,10000        ; limit view range
 610 
    cmp edi,10000        ; limit view range
596 
    jb raycast
 611 
    jb raycast
Line 610... Line 625...
610
625 
 
611 
copyfloor:
 626 
copyfloor:
612 
    sub eax,1920
 627 
    sub eax,1920
Line 613... Line 628...
613 
    add ebx,1920
 628 
    add ebx,1920
614
629 
 
615 
    mov ecx,0
 630 
;    mov ecx,0
616 
    add ecx,[vx1]
 631 
;    add ecx,[vx1]
- 
 
 632 
;    add ecx,[vx1]
- 
 
 633 
;    add ecx,[vx1]
617 
    add ecx,[vx1]
 634 
    mov ecx, [vx1]
618 
    add ecx,[vx1]
 635 
    lea ecx, [ecx+ecx*2]
- 
 
 636 
 
- 
 
 637 
;    mov edx,ecx
- 
 
 638 
;    add ecx,eax
619
639 
;    add edx,ebx
620 
    mov edx,ecx
 - 
 
Line 621... Line 640...
621 
    add ecx,eax
 640 
    lea edx, [ecx+ebx]
622 
    add edx,ebx
 641 
    add ecx,eax
Line 623... Line 642...
623
642 
 
Line 671... Line 690...
671 
    jg speedup
 690 
    jg speedup
Line 672... Line 691...
672
691 
 
673 
    xor edx,edx
 692 
    xor edx,edx
674 
    mov eax, edi
 693 
    mov eax, edi
675 
    mov ebx,[vdd]
 694 
    mov ebx,[vdd]
- 
 
 695 
;    add ebx,[vdd]
676 
    add ebx,[vdd]
 696 
    add ebx, ebx
677 
    div ebx
 697 
    div ebx
678 
    and eax,63
 698 
    and eax,63
Line 679... Line 699...
679 
    mov [ytemp],eax   ; get y of texture for wall
 699 
    mov [ytemp],eax   ; get y of texture for wall
Line 761... Line 781...
761
781 
 
Line 762... Line 782...
762 
 call dark_distance ; deactivate wall distance darkening: a bit faster
 782 
 call dark_distance ; deactivate wall distance darkening: a bit faster
763
783 
 
764 
; ******* DRAW WALL PIXEL *******
 784 
; ******* DRAW WALL PIXEL *******
- 
 
 785 
    mov eax,esi
765 
    mov eax,esi
 786 
;    sub eax,22
766 
    sub eax,22
 787 
    lea eax, [esi-22]
767 
    imul eax,1920
 788 
    imul eax,1920
768 
    add eax,[vx1]
 789 
;    add eax,[vx1]
769 
    add eax,[vx1]
 790 
;    add eax,[vx1]
- 
 
 791 
;    add eax,[vx1]
- 
 
 792 
;    add eax,0x80000
- 
 
 793 
    mov ebx, [vx1]
Line 770... Line 794...
770 
    add eax,[vx1]
 794 
    lea ebx, [ebx+ebx*2]
771 
    add eax,0x80000
 795 
    lea eax, [eax+0x80000+ebx]
772
796 
 
773 
    cmp eax,0x80000+1920*480
 797 
    cmp eax,0x80000+1920*480
Line 812... Line 836...
812 
pusha
 836 
pusha
813 
mov eax,0x080000+360*1920
 837 
mov eax,0x080000+360*1920
Line 814... Line 838...
814
838 
 
815 
copyfloor2:
 839 
copyfloor2:
816 
    add eax,1920
 840 
    add eax,1920
817 
    mov ebx,eax
 841 
;    mov ebx,eax
818 
    add ebx,[vx1]
 842 
;    add ebx,[vx1]
819 
    add ebx,[vx1]
 843 
;    add ebx,[vx1]
- 
 
 844 
;    add ebx,[vx1]
- 
 
 845 
    mov ebx,[vx1]
- 
 
 846 
    lea ebx, [ebx+ebx*2]
- 
 
 847 
    add ebx, eax
Line 820... Line 848...
820 
    add ebx,[vx1]
 848 
 
821
849 
 
822 
    mov ecx,[ebx-15]
 850 
    mov ecx,[ebx-15]
823 
    and ecx,0x00FEFEFE
 851 
    and ecx,0x00FEFEFE
Line 986... Line 1014...
986 
sindegree dd 0.0
 1014 
sindegree dd 0.0
987 
sininc    dd 0.0017453292519943295769236907684886
 1015 
sininc    dd 0.0017453292519943295769236907684886
988 
sindiv    dd 6553.5
1016 
sindiv    dd 6553.5
989 
textures:
 1017 
textures:
990 
	file 'texture.gif'
 1018 
	file 'texture.gif'
- 
 
 1019 
 
991 
I_END:
 1020 
align 4
Line 992... Line 1021...
992
1021 
 
993 
col1:
 1022 
col1:
994 
 dd ?;-
 1023 
 dd ?;-
995 
; misc raycaster vars:
 1024 
; misc raycaster vars:
Line 1073... Line 1102...
1073 
step64:
 1102 
step64:
1074 
 dd ?;-
 1103 
 dd ?;-
1075 
lasty:
 1104 
lasty:
1076 
 dd ?;-
 1105 
 dd ?;-
Line -... Line 1106...
- 
 
 1106 
 
1077
1107 
I_END:
1078 
sinus rd 360*10
1108 
sinus rd 360*10