forked from KolibriOS/kolibrios
1080 lines
22 KiB
NASM
1080 lines
22 KiB
NASM
;
|
|
; Fisheye Raycasting Engine Etc. FREE3D for MENUETOS by Dieter Marfurt
|
|
; Version 0.4 (requires some texture-files to compile (see Data Section))
|
|
; dietermarfurt@angelfire.com - www.melog.ch/mos_pub/
|
|
; Don't hit me - I'm an ASM-Newbie... since years :)
|
|
;
|
|
; Compile with FASM for Menuet (requires .INC files - see DATA Section)
|
|
;
|
|
; Willow - greatly srinked code size by using GIF texture and FPU to calculate sine table
|
|
;
|
|
; !!!! Don't use GIF.INC in your apps - it's modified for FREE3D !!!!
|
|
|
|
TEX_SIZE equ 64*64*4
|
|
ceil = sinus+16*1024
|
|
wall = ceil+TEX_SIZE*1
|
|
wall2 = ceil+TEX_SIZE*2
|
|
wall3 = ceil+TEX_SIZE*3
|
|
wall4 = ceil+TEX_SIZE*4
|
|
wall5 = ceil+TEX_SIZE*5
|
|
wall6 = ceil+TEX_SIZE*6
|
|
wall7 = ceil+TEX_SIZE*7
|
|
APP_MEM equ 0x200000
|
|
|
|
use32
|
|
|
|
org 0x0
|
|
|
|
db 'MENUET01' ; 8 byte id
|
|
dd 0x01 ; header version
|
|
dd START ; start of code
|
|
dd I_END ; size of image
|
|
dd APP_MEM;0x300000 ; memory for app
|
|
dd APP_MEM;0x300000 ; esp
|
|
dd 0x0 , 0x0 ; I_Param , I_Icon
|
|
include 'lang.inc'
|
|
include 'macros.inc'
|
|
COLOR_ORDER equ OTHER
|
|
include 'gif.inc'
|
|
|
|
START: ; start of execution
|
|
mov esi,textures
|
|
mov edi,ceil
|
|
mov eax,sinus
|
|
call ReadGIF
|
|
mov esi,sinus
|
|
mov ecx,360*10
|
|
fninit
|
|
fld [sindegree]
|
|
.sinlp:
|
|
fst st1
|
|
fsin
|
|
fmul [sindiv]
|
|
fistp dword[esi]
|
|
add esi,4
|
|
fadd [sininc]
|
|
loop .sinlp
|
|
call draw_window ; at first, draw the window
|
|
call draw_stuff
|
|
|
|
gamestart:
|
|
; ******* MOUSE CHECK *******
|
|
; mov eax,37 ; check mouse (use mouse over window to navigate)
|
|
; mov ebx,2 ; check mousebuttons
|
|
; int 0x40
|
|
; cmp eax,0 ; only use mouse when button down
|
|
; je noneed ; deactivated cause of disappear-bug etc.
|
|
mov eax,37
|
|
mov ebx,1 ; check mouseposition
|
|
int 0x40
|
|
|
|
mov ebx,eax
|
|
shr eax,16
|
|
and eax,0x0000FFFF ; mousex
|
|
and ebx,0x0000FFFF ; mousey
|
|
|
|
cmp eax,5 ; mouse out of window ?
|
|
jb check_refresh ; it will prevent an app-crash
|
|
cmp ebx,22
|
|
jb check_refresh
|
|
cmp eax, 640
|
|
jg check_refresh
|
|
cmp ebx,501
|
|
jg check_refresh
|
|
|
|
cmp eax,315 ; navigating?
|
|
jb m_left
|
|
cmp eax,325 ;
|
|
jg m_right
|
|
continue:
|
|
cmp ebx,220 ;
|
|
jb s_up
|
|
cmp ebx,260 ;
|
|
jg s_down
|
|
; ******* END OF MOUSE CHECK *******
|
|
check_refresh:
|
|
|
|
; mov eax,23 ; wait for system event with 10 ms timeout
|
|
; mov ebx,1 ; thats max 100 FPS
|
|
mov eax,11 ; ask no wait for full speed
|
|
int 0x40
|
|
|
|
cmp eax,1 ; window redraw request ?
|
|
je red2
|
|
cmp eax,2 ; key in buffer ?
|
|
je key2
|
|
cmp eax,3 ; button in buffer ?
|
|
je button2
|
|
|
|
mov edi,[mouseya] ; check flag if a refresh has to be done
|
|
cmp edi,1
|
|
jne gamestart
|
|
mov [mouseya],dword 0
|
|
call draw_stuff
|
|
|
|
|
|
jmp gamestart
|
|
|
|
; END OF MAINLOOP
|
|
|
|
red2: ; redraw
|
|
call draw_window
|
|
call draw_stuff
|
|
jmp gamestart
|
|
|
|
key2: ; key
|
|
mov eax,2
|
|
int 0x40
|
|
cmp al,1
|
|
je gamestart ; keybuffer empty
|
|
|
|
cmp ah,27 ; esc=End App
|
|
je finish
|
|
|
|
cmp ah,178 ; up
|
|
je s_up
|
|
cmp ah,177 ; down
|
|
je s_down
|
|
cmp ah,176 ; left
|
|
je s_left
|
|
cmp ah,179 ; right
|
|
je s_right
|
|
|
|
jmp gamestart ; was any other key
|
|
|
|
|
|
s_up: ; walk forward (key or mouse)
|
|
mov eax,[vpx]
|
|
mov ebx,[vpy]
|
|
|
|
|
|
mov ecx,[vheading]
|
|
imul ecx,4
|
|
add ecx,sinus
|
|
mov edi,[ecx]
|
|
|
|
mov edx,[vheading]
|
|
imul edx,4
|
|
add edx,sinus
|
|
add edx,3600
|
|
cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
|
|
jb ok200
|
|
sub edx,14400
|
|
ok200:
|
|
mov esi,[edx]
|
|
; sal esi,1 ; edit walking speed here
|
|
; sal edi,1
|
|
|
|
add eax,edi ; newPx
|
|
add ebx,esi ; newPy
|
|
mov edi,eax ; newPx / ffff
|
|
mov esi,ebx ; newPy / ffff
|
|
sar edi,16
|
|
sar esi,16
|
|
mov ecx,esi
|
|
sal ecx,5 ; equal *32
|
|
add ecx,edi
|
|
add ecx,grid
|
|
cmp [ecx],byte 0 ; collision check
|
|
jne cannotwalk0
|
|
mov [vpx],eax
|
|
mov [vpy],ebx
|
|
mov [mouseya],dword 1 ; set refresh flag
|
|
cannotwalk0:
|
|
jmp check_refresh
|
|
|
|
s_down: ; walk backward
|
|
mov eax,[vpx]
|
|
mov ebx,[vpy]
|
|
|
|
mov ecx,[vheading]
|
|
imul ecx,4
|
|
add ecx,sinus
|
|
mov edi,[ecx]
|
|
|
|
mov edx,[vheading]
|
|
imul edx,4
|
|
add edx,sinus
|
|
add edx,3600
|
|
cmp edx,eosinus ;cosinus taken from (sinus plus 900) mod 3600
|
|
jb ok201
|
|
sub edx,14400
|
|
ok201:
|
|
|
|
mov esi,[edx]
|
|
; sal esi,1 ; edit walking speed here
|
|
; sal edi,1
|
|
|
|
sub eax,edi ; newPx
|
|
sub ebx,esi ; newPy
|
|
mov edi,eax ; newPx / ffff
|
|
mov esi,ebx ; newPy / ffff
|
|
sar edi,16
|
|
sar esi,16
|
|
mov ecx,esi
|
|
sal ecx,5
|
|
add ecx,edi
|
|
add ecx,grid
|
|
cmp [ecx],byte 0
|
|
jne cannotwalk1
|
|
mov [vpx],eax
|
|
mov [vpy],ebx
|
|
mov [mouseya],dword 1
|
|
cannotwalk1:
|
|
jmp check_refresh
|
|
|
|
s_left: ; turn left (key)
|
|
mov edi,[vheading] ; heading
|
|
add edi,50
|
|
cmp edi,3600
|
|
jb ok_heading0
|
|
sub edi,3600
|
|
ok_heading0:
|
|
mov [vheading],edi
|
|
mov [mouseya],dword 1
|
|
jmp check_refresh
|
|
|
|
s_right: ; turn right
|
|
mov edi,[vheading]
|
|
sub edi,50
|
|
cmp edi,-1
|
|
jg ok_heading1
|
|
add edi,3600
|
|
ok_heading1:
|
|
mov [vheading],edi
|
|
mov [mouseya],dword 1
|
|
jmp check_refresh
|
|
|
|
m_left: ; turn left (mouse)
|
|
mov edi,[vheading] ; heading
|
|
mov ecx,315
|
|
sub ecx,eax
|
|
sar ecx,2
|
|
add edi,ecx
|
|
cmp edi,3600
|
|
jb ok_heading2
|
|
sub edi,3600
|
|
ok_heading2:
|
|
mov [vheading],edi
|
|
mov [mouseya],dword 1
|
|
jmp continue ; allow both: walk and rotate
|
|
|
|
m_right: ; turn right
|
|
mov edi,[vheading]
|
|
sub eax,325
|
|
sar eax,2
|
|
sub edi,eax
|
|
cmp edi,-1
|
|
jg ok_heading3
|
|
add edi,3600
|
|
ok_heading3:
|
|
mov [vheading],edi
|
|
mov [mouseya],dword 1
|
|
jmp continue
|
|
|
|
|
|
|
|
button2: ; button
|
|
mov eax,17 ; get id
|
|
int 0x40
|
|
cmp ah,1 ; button id=1 ?
|
|
jne gamestart
|
|
|
|
; eo GAME mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
|
|
finish:
|
|
mov eax,-1 ; close this program
|
|
int 0x40
|
|
|
|
|
|
; *********************************************
|
|
; ******* WINDOW DEFINITIONS AND DRAW ********
|
|
; *********************************************
|
|
|
|
|
|
draw_window:
|
|
|
|
mov eax,12 ; function 12:tell os about windowdraw
|
|
mov ebx,1 ; 1, start of draw
|
|
int 0x40
|
|
|
|
; DRAW WINDOW
|
|
mov eax,0 ; function 0 : define and draw window
|
|
mov ebx,50*65536+649 ; [x start] *65536 + [x size]
|
|
mov ecx,50*65536+504 ; [y start] *65536 + [y size]
|
|
mov edx,0x02ffffff ; color of work area RRGGBB,8->color gl
|
|
mov esi,0x80777777 ; color of grab bar RRGGBB,8->color gl
|
|
mov edi,0x00777777 ; color of frames RRGGBB
|
|
int 0x40
|
|
|
|
; WINDOW LABEL
|
|
mov eax,4 ; function 4 : write text to window
|
|
mov ebx,8*65536+8 ; [x start] *65536 + [y start]
|
|
mov ecx,0x00ddeeff ; color of text RRGGBB
|
|
mov edx,labelt ; pointer to text beginning
|
|
mov esi,labellen-labelt ; text length
|
|
int 0x40
|
|
|
|
; CLOSE BUTTON
|
|
mov eax,8 ; function 8 : define and draw button
|
|
mov ebx,(649-19)*65536+12 ; [x start] *65536 + [x size]
|
|
mov ecx,5*65536+12 ; [y start] *65536 + [y size]
|
|
mov edx,1 ; button id
|
|
mov esi,0x777777 ; button color RRGGBB
|
|
int 0x40
|
|
|
|
|
|
mov eax,12 ; function 12:tell os about windowdraw
|
|
mov ebx,2 ; 2, end of draw
|
|
int 0x40
|
|
|
|
ret
|
|
|
|
; *********************************************
|
|
; ******* COMPUTE 3D-VIEW ********
|
|
; *********************************************
|
|
draw_stuff:
|
|
|
|
|
|
mov [step1],dword 1
|
|
;mov [step64],dword 64
|
|
mov esi,[vheading]
|
|
add esi,320
|
|
mov [va],esi
|
|
mov eax,[vheading]
|
|
sub eax,320
|
|
mov [vacompare],eax
|
|
;------------------------------------ CAST 640 PIXEL COLUMNS ---------------
|
|
; FOR A=320+heading to -319+heading step -1 (a is stored in [va])
|
|
;---------------------------------------------------------------------------
|
|
; mov edx,5
|
|
mov [vx1],dword 0 ;5 ;edx ; init x1 ... pixelcolumn
|
|
for_a:
|
|
mov edx,[vx1]
|
|
mov [vx1b],edx
|
|
sub [vx1b],dword 320
|
|
mov edx,[va] ; a2
|
|
cmp edx,-1 ; a2 is a mod 3600
|
|
jg ok1
|
|
add edx,3600
|
|
ok1:
|
|
cmp edx,3600
|
|
jb ok2
|
|
sub edx,3600
|
|
ok2:
|
|
|
|
; get stepx and stepy
|
|
mov ecx,edx
|
|
imul ecx,4
|
|
add ecx,sinus ; pointer to stepx
|
|
mov esi,[ecx]
|
|
sar esi,4 ; accuracy
|
|
mov [vstepx],esi ; store stepx
|
|
|
|
mov esi,edx
|
|
imul esi,4
|
|
add esi,sinus ; pointer to stepy
|
|
add esi,3600
|
|
cmp esi,eosinus ;cosinus taken from ((sinus plus 900) mod 3600)
|
|
jb ok202
|
|
sub esi,14400
|
|
ok202:
|
|
|
|
mov ecx,[esi]
|
|
sar ecx,4
|
|
mov [vstepy],ecx ; store stepy
|
|
|
|
|
|
mov eax,[vpx] ; get Camera Position
|
|
mov ebx,[vpy]
|
|
mov [vxx],eax ; init caster position
|
|
mov [vyy],ebx
|
|
|
|
mov edi,0 ; init L (number of raycsting-steps)
|
|
mov [step1],dword 1 ; init Caster stepwidth for L
|
|
|
|
; raycast a pixel column.................................
|
|
raycast:
|
|
add edi,[step1] ; count caster steps
|
|
;jmp nodouble ; use this to prevent blinking/wobbling textures: much slower!
|
|
|
|
cmp edi,32
|
|
je double
|
|
cmp edi,512
|
|
je double
|
|
cmp edi,1024
|
|
je double
|
|
jmp nodouble
|
|
|
|
double:
|
|
mov edx,[step1]
|
|
sal edx,1
|
|
mov [step1],edx
|
|
|
|
mov edx,[vstepx]
|
|
sal edx,1
|
|
mov [vstepx],edx
|
|
|
|
mov edx,[vstepy]
|
|
sal edx,1
|
|
mov [vstepy],edx
|
|
|
|
nodouble:
|
|
|
|
mov eax,32000 ; 3600 ; determine Floors Height based on distance
|
|
mov edx,0
|
|
mov ebx,edi
|
|
|
|
div ebx
|
|
mov esi,eax
|
|
mov [vdd],esi
|
|
mov edx,260
|
|
sub edx,esi
|
|
mov [vh],edx
|
|
|
|
cmp edx,22
|
|
jb no_nu_pixel
|
|
cmp edx,259
|
|
jg no_nu_pixel ; draw only new pixels
|
|
cmp edx,[h_old]
|
|
je no_nu_pixel
|
|
|
|
mov eax,[vxx] ; calc floor pixel
|
|
mov ebx,[vyy]
|
|
|
|
and eax,0x0000FFFF
|
|
and ebx,0x0000FFFF
|
|
|
|
shr eax,10
|
|
shr ebx,10 ; pixel coords inside Texture x,y 64*64
|
|
mov [xfrac],eax
|
|
mov [yfrac],ebx
|
|
|
|
|
|
|
|
; plot floor pixel !!!!
|
|
mov [vl],edi ; save L
|
|
mov [ytemp],esi ; remember L bzw. H
|
|
|
|
mov edi,[yfrac] ; get pixel color of this floor pixel
|
|
sal edi,8
|
|
mov esi,[xfrac]
|
|
sal esi,2
|
|
add edi,esi
|
|
add edi,wall ; in fact its floor, just using the wall texture :)
|
|
mov edx,[edi]
|
|
mov [remesi],esi
|
|
|
|
;**** calculate pixel adress:****
|
|
mov esi,[ytemp]
|
|
add esi,240
|
|
imul esi,1920
|
|
add esi,[vx1]
|
|
add esi,[vx1]
|
|
add esi,[vx1]
|
|
add esi,0x80000
|
|
|
|
cmp esi,0x80000+1920*480
|
|
jg foff0
|
|
cmp esi,0x80000
|
|
jb foff0
|
|
; now we have the adress of the floor-pixel color in edi
|
|
; and the adress of the pixel in the image in esi
|
|
|
|
mov edx,[edi]
|
|
;******************** custom distance DARKEN Floor
|
|
|
|
mov eax,[vdd]
|
|
|
|
; jmp nodark0 ; use this to deactivate darkening floor (a bit faster)
|
|
|
|
cmp eax,80
|
|
jg nodark0
|
|
; split rgb
|
|
|
|
mov [blue],edx
|
|
and [blue],dword 255
|
|
|
|
shr edx,8
|
|
mov [green],edx
|
|
and [green],dword 255
|
|
|
|
shr edx,8
|
|
mov [red],edx
|
|
and [red],dword 255
|
|
|
|
mov eax,81 ; darkness parameter
|
|
sub eax,[vdd]
|
|
sal eax,1
|
|
|
|
; reduce rgb
|
|
sub [red],eax
|
|
cmp [red], dword 0
|
|
jg notblack10
|
|
mov [red],dword 0
|
|
notblack10:
|
|
|
|
sub [green],eax
|
|
cmp [green],dword 0
|
|
jg notblack20
|
|
mov [green],dword 0
|
|
notblack20:
|
|
|
|
mov edx,[blue]
|
|
sub [blue],eax
|
|
cmp [blue],dword 0
|
|
jg notblack30
|
|
mov [blue],dword 0
|
|
notblack30:
|
|
|
|
shl dword [red],16 ; reassemble rgb
|
|
shl dword [green],8
|
|
mov edx,[red]
|
|
or edx,[green]
|
|
or edx,[blue]
|
|
|
|
nodark0:
|
|
; eo custom darken floor
|
|
|
|
|
|
mov eax,edx
|
|
mov [esi],eax ; actually draw the floor pixel
|
|
|
|
; paint "forgotten" pixels
|
|
|
|
mov edx,[lasty]
|
|
sub edx,1920
|
|
cmp esi,edx
|
|
je foff0
|
|
mov [esi+1920],eax
|
|
|
|
sub edx,1920
|
|
cmp esi,edx
|
|
je foff0
|
|
mov [edx+1920],eax
|
|
|
|
sub edx,1920
|
|
cmp esi,edx
|
|
je foff0
|
|
mov [edx+1920],eax
|
|
|
|
foff0:
|
|
mov [lasty],esi
|
|
;**** end of draw floor pixel ****
|
|
|
|
mov esi,[remesi]
|
|
mov edi,[vl] ; restore L
|
|
|
|
no_nu_pixel:
|
|
|
|
|
|
mov esi,[vh]
|
|
mov [h_old],esi
|
|
|
|
mov eax,[vxx]
|
|
mov ebx,[vyy]
|
|
|
|
add eax,[vstepx] ; casting...
|
|
add ebx,[vstepy]
|
|
|
|
mov [vxx],eax
|
|
mov [vyy],ebx
|
|
|
|
sar eax,16
|
|
sar ebx,16
|
|
|
|
mov [vpxi],eax ; casters position in Map Grid
|
|
mov [vpyi],ebx
|
|
|
|
mov edx,ebx
|
|
; imul edx,32
|
|
shl edx,5
|
|
add edx,grid
|
|
add edx,eax
|
|
cmp [edx],byte 0 ; raycaster reached a wall? (0=no)
|
|
jne getout
|
|
cmp edi,10000 ; limit view range
|
|
jb raycast
|
|
;................................................
|
|
getout:
|
|
mov eax,[edx] ; store Grid Wall Value for Texture Selection
|
|
mov [vk],eax
|
|
|
|
call blur ; deactivate this (blurs the near floor) : a bit faster
|
|
|
|
; simply copy floor to ceil pixel column here
|
|
;jmp nocopy ; use this for test purposes
|
|
|
|
pusha
|
|
mov eax,0x80000+1920*240
|
|
mov ebx,0x80000+1920*240
|
|
|
|
copyfloor:
|
|
sub eax,1920
|
|
add ebx,1920
|
|
|
|
mov ecx,0
|
|
add ecx,[vx1]
|
|
add ecx,[vx1]
|
|
add ecx,[vx1]
|
|
|
|
mov edx,ecx
|
|
add ecx,eax
|
|
add edx,ebx
|
|
|
|
mov esi,[edx]
|
|
mov [ecx],esi
|
|
|
|
cmp eax,0x80000
|
|
jg copyfloor
|
|
|
|
popa
|
|
; *** end of copy floor to ceil
|
|
;nocopy:
|
|
;__________________________________________________________________________
|
|
|
|
|
|
; draw this pixelrows wall
|
|
mov [vl],edi
|
|
|
|
mov edi,260
|
|
sub edi,[vdd]
|
|
cmp edi,0
|
|
jg ok3
|
|
xor edi,edi
|
|
ok3:
|
|
mov [vbottom],edi ; end wall ceil (or window top)
|
|
|
|
mov esi,262
|
|
add esi,[vdd] ; start wall floor
|
|
|
|
xor edi,edi
|
|
|
|
; somethin is wrong with xfrac,so recalc...
|
|
|
|
mov eax,[vxx]
|
|
and eax,0x0000FFFF
|
|
shr eax,10
|
|
mov [xfrac],eax
|
|
|
|
mov eax,[vyy]
|
|
and eax,0x0000FFFF
|
|
shr eax,10
|
|
mov [yfrac],eax
|
|
|
|
pixelrow:
|
|
|
|
; find each pixels color:
|
|
|
|
add edi,64
|
|
sub esi,1
|
|
cmp esi, 502 ; dont calc offscreen-pixels
|
|
jg speedup
|
|
|
|
xor edx,edx
|
|
mov eax, edi
|
|
mov ebx,[vdd]
|
|
add ebx,[vdd]
|
|
div ebx
|
|
and eax,63
|
|
mov [ytemp],eax ; get y of texture for wall
|
|
|
|
mov eax,[xfrac]
|
|
add eax,[yfrac]
|
|
|
|
and eax,63
|
|
mov [xtemp],eax ; get x of texture for wall
|
|
|
|
; now prepare to plot that wall-pixel...
|
|
mov [remedi],edi
|
|
|
|
mov edi,[ytemp]
|
|
sal edi,8
|
|
mov edx,[xtemp]
|
|
sal edx,2
|
|
add edi,edx
|
|
|
|
mov eax,[vk] ; determine which texture should be used
|
|
and eax,255
|
|
|
|
cmp eax,1
|
|
jne checkmore1
|
|
add edi,ceil
|
|
jmp foundtex
|
|
checkmore1:
|
|
|
|
cmp eax,2
|
|
jne checkmore2
|
|
add edi,wall
|
|
jmp foundtex
|
|
checkmore2:
|
|
|
|
cmp eax,3
|
|
jne checkmore3
|
|
add edi,wall2
|
|
jmp foundtex
|
|
checkmore3:
|
|
|
|
cmp eax,4
|
|
jne checkmore4
|
|
add edi,wall3
|
|
jmp foundtex
|
|
checkmore4:
|
|
|
|
cmp eax,5
|
|
jne checkmore5
|
|
add edi,wall4
|
|
jmp foundtex
|
|
checkmore5:
|
|
|
|
cmp eax,6
|
|
jne checkmore6
|
|
add edi,wall5
|
|
jmp foundtex
|
|
checkmore6:
|
|
|
|
cmp eax,7
|
|
jne checkmore7
|
|
add edi,wall6
|
|
jmp foundtex
|
|
checkmore7:
|
|
|
|
cmp eax,8
|
|
jne checkmore8
|
|
add edi,wall7
|
|
jmp foundtex
|
|
checkmore8:
|
|
|
|
foundtex:
|
|
|
|
mov edx,[edi] ; get pixel color inside texture
|
|
|
|
; ***pseudoshade south-west
|
|
jmp east ; activate this for southwest pseudoshade : a bit slower + blink-bug
|
|
mov edi,[yfrac]
|
|
mov [pseudo],dword 0 ; store flag for custom distance darkening
|
|
cmp edi,[xfrac]
|
|
jge east
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
mov [pseudo],dword 1
|
|
east:
|
|
|
|
call dark_distance ; deactivate wall distance darkening: a bit faster
|
|
|
|
; ******* DRAW WALL PIXEL *******
|
|
mov eax,esi
|
|
sub eax,22
|
|
imul eax,1920
|
|
add eax,[vx1]
|
|
add eax,[vx1]
|
|
add eax,[vx1]
|
|
add eax,0x80000
|
|
|
|
cmp eax,0x80000+1920*480
|
|
jg dont_draw
|
|
cmp eax,0x80000
|
|
jb dont_draw
|
|
mov [eax],edx ; actually set the pixel in the image
|
|
; *** eo draw wall pixel
|
|
dont_draw:
|
|
mov edi,[remedi]
|
|
speedup:
|
|
cmp esi,[vbottom] ; end of this column?
|
|
jg pixelrow
|
|
|
|
mov edi,[vl] ; restoring
|
|
mov eax,[vx1] ; inc X1
|
|
add eax,1
|
|
mov [vx1],eax
|
|
|
|
;*** NEXT A ***
|
|
mov esi,[va]
|
|
sub esi,1
|
|
mov [va],esi
|
|
cmp esi,[vacompare]
|
|
jg for_a
|
|
;*** EO NEXT A ***
|
|
;---------------------------------------------------------------------------
|
|
|
|
|
|
; **** put image !!!!!****
|
|
; ***********************
|
|
mov eax,7
|
|
mov ebx,0x80000
|
|
mov ecx,640*65536+480
|
|
mov edx,5*65536+20
|
|
int 0x40
|
|
|
|
ret
|
|
|
|
blur:
|
|
|
|
pusha
|
|
mov eax,0x080000+360*1920
|
|
|
|
copyfloor2:
|
|
add eax,1920
|
|
mov ebx,eax
|
|
add ebx,[vx1]
|
|
add ebx,[vx1]
|
|
add ebx,[vx1]
|
|
|
|
mov ecx,[ebx-15]
|
|
and ecx,0x00FEFEFE
|
|
shr ecx,1
|
|
mov edx,[ebx-12]
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
add edx,ecx
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
|
|
mov ecx,[ebx-9]
|
|
and ecx,0x00FEFEFE
|
|
shr ecx,1
|
|
add edx,ecx
|
|
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
|
|
mov ecx,[ebx-6]
|
|
and ecx,0x00FEFEFE
|
|
shr ecx,1
|
|
add edx,ecx
|
|
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
|
|
mov ecx,[ebx-3]
|
|
and ecx,0x00FEFEFE
|
|
shr ecx,1
|
|
add edx,ecx
|
|
|
|
and edx,0x00FEFEFE
|
|
shr edx,1
|
|
|
|
mov ecx,[ebx]
|
|
and ecx,0x00FEFEFE
|
|
shr ecx,1
|
|
add edx,ecx
|
|
|
|
mov [ebx],edx
|
|
|
|
cmp eax,0x80000+478*1920
|
|
jb copyfloor2
|
|
|
|
popa
|
|
|
|
ret
|
|
|
|
|
|
|
|
; ******* Darken by Distance *******
|
|
dark_distance:
|
|
|
|
; color must be in edx, wall height in [vdd]
|
|
|
|
mov eax,[vdd]
|
|
cmp eax,50
|
|
jg nodark
|
|
; split rgb
|
|
|
|
mov [blue],edx
|
|
and [blue],dword 255
|
|
|
|
shr edx,8
|
|
mov [green],edx
|
|
and [green],dword 255
|
|
|
|
shr edx,8
|
|
mov [red],edx
|
|
and [red],dword 255
|
|
|
|
mov eax,51 ; darkness parameter
|
|
sub eax,[vdd]
|
|
cmp [pseudo],dword 1
|
|
je isdarkside
|
|
sal eax,2
|
|
isdarkside:
|
|
|
|
; reduce rgb
|
|
sub [red],eax
|
|
cmp [red], dword 0
|
|
jg notblack10b
|
|
mov [red],dword 0
|
|
notblack10b:
|
|
|
|
sub [green],eax
|
|
cmp [green],dword 0
|
|
jg notblack20b
|
|
mov [green],dword 0
|
|
notblack20b:
|
|
|
|
mov edx,[blue]
|
|
sub [blue],eax
|
|
cmp [blue],dword 0
|
|
jg notblack30b
|
|
mov [blue],dword 0
|
|
notblack30b:
|
|
|
|
shl dword [red],16 ; reassemble rgb
|
|
shl dword [green],8
|
|
mov edx,[red]
|
|
or edx,[green]
|
|
or edx,[blue]
|
|
mov eax,edx
|
|
|
|
nodark:
|
|
|
|
ret
|
|
|
|
|
|
; DATA AREA
|
|
|
|
;ceil=ceil
|
|
;wall=wall floor
|
|
;2 corner stone
|
|
;3 leaf mosaic
|
|
;4 closed window
|
|
;5 greek mosaic
|
|
;6 old street stones
|
|
;7 maya wall
|
|
|
|
grid: ; 32*32 Blocks, Map: 0 = Air, 1 to 8 = Wall
|
|
db 2,1,2,1,2,1,2,1,2,1,2,1,1,1,1,1,1,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
|
|
db 1,0,0,0,1,0,0,0,0,0,0,3,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8
|
|
db 5,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8
|
|
db 1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,1,0,0,0,0,3,3,3,3,0,0,0,0,0,0,8
|
|
db 5,0,1,2,3,4,5,6,7,8,2,1,3,3,3,0,5,0,2,1,2,3,0,0,0,0,0,0,0,0,0,8
|
|
db 1,0,0,0,0,0,0,0,0,0,2,3,0,0,0,0,5,0,0,0,0,3,0,0,0,0,0,0,0,0,0,8
|
|
db 5,0,0,0,1,0,0,4,0,0,0,1,0,0,0,0,5,0,0,0,0,3,3,0,3,3,0,0,0,0,0,8
|
|
db 1,1,0,1,1,1,1,4,1,0,1,3,0,0,0,0,5,2,1,2,0,3,0,0,0,3,0,0,0,0,0,8
|
|
db 5,0,0,0,1,0,0,0,0,0,0,1,0,3,3,3,5,0,0,0,0,3,0,0,0,3,0,0,0,0,0,8
|
|
db 1,0,0,0,1,0,0,5,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,3,0,0,0,0,0,8
|
|
db 5,0,0,0,0,0,0,5,0,0,0,1,0,0,0,0,5,0,0,0,0,3,0,0,0,0,0,0,0,0,0,8
|
|
db 1,4,4,4,4,4,4,4,4,4,4,3,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,8,8
|
|
db 2,2,2,2,2,2,8,8,8,8,8,8,8,8,8,0,0,0,6,6,0,7,7,7,7,7,7,7,7,7,8,8
|
|
db 1,0,0,0,1,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1
|
|
db 5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,2,2,2,2,0,0,0,0,3,3,3,3,3,1
|
|
db 1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,6,0,0,0,0,2,0,0,0,0,3,0,0,0,0,1
|
|
db 5,0,2,3,2,3,2,3,2,3,2,1,0,0,0,0,6,0,2,2,0,2,0,0,0,0,3,0,5,5,0,1
|
|
db 1,0,0,0,0,0,0,4,0,0,0,3,0,0,0,0,6,0,0,2,0,2,0,2,0,0,3,0,0,0,0,1
|
|
db 5,0,0,0,1,0,0,4,0,0,0,1,0,0,0,0,6,0,0,2,2,2,0,2,0,0,3,3,3,3,0,1
|
|
db 1,1,0,1,1,1,1,4,1,0,1,3,7,7,7,0,6,0,0,0,0,0,0,2,0,0,0,0,0,3,0,1
|
|
db 5,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,6,0,0,0,0,2,2,2,0,0,0,0,0,3,0,1
|
|
db 1,0,0,0,1,0,0,5,0,0,0,3,0,0,0,0,6,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1
|
|
db 5,0,0,0,0,0,0,5,0,0,0,1,0,0,0,0,6,0,5,1,0,2,0,0,4,4,0,4,4,0,0,1
|
|
db 1,4,1,4,1,4,1,4,1,4,1,3,0,0,0,0,6,0,0,5,0,2,0,0,0,4,0,4,0,0,0,1
|
|
db 1,0,0,0,0,0,0,4,0,0,0,3,0,3,3,3,6,0,0,1,0,1,0,0,4,4,0,4,4,0,0,1
|
|
db 5,0,0,0,1,0,0,4,0,0,0,1,0,0,0,0,6,0,0,5,0,1,0,4,4,0,0,0,4,4,0,1
|
|
db 1,1,0,1,1,1,1,4,1,0,1,3,0,0,0,0,6,0,0,1,0,1,0,4,0,0,0,0,0,4,0,1
|
|
db 5,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,6,0,0,5,0,1,0,4,0,0,0,0,0,4,0,1
|
|
db 1,0,0,0,1,0,0,5,0,0,0,3,0,0,0,0,6,1,5,1,0,1,0,4,4,0,0,0,4,4,0,1
|
|
db 5,0,0,0,0,0,0,5,0,0,0,0,0,0,1,1,0,0,0,0,0,1,0,0,4,4,4,4,4,0,0,1
|
|
db 1,4,1,4,1,4,1,4,1,4,1,3,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1
|
|
db 2,1,2,1,2,1,2,1,2,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
|
|
|
|
vpx:
|
|
dd 0x0001FFFF ; initial player position * 0xFFFF
|
|
vpy:
|
|
dd 0x0001FFFF
|
|
|
|
labelt:
|
|
db 'FISHEYE RAYCASTING ENGINE ETC. FREE3D'
|
|
|
|
labellen:
|
|
sindegree dd 0.0
|
|
sininc dd 0.0017453292519943295769236907684886
|
|
sindiv dd 6553.5
|
|
textures:
|
|
file 'texture.gif'
|
|
I_END:
|
|
|
|
col1:
|
|
dd ?;-
|
|
; misc raycaster vars:
|
|
vxx:
|
|
dd ?;-
|
|
vyy:
|
|
dd ?;-
|
|
vl:
|
|
dd ?;-
|
|
vstepx:
|
|
dd ?;-
|
|
vstepy:
|
|
dd ?;-
|
|
vxxint:
|
|
dd ?;-
|
|
vyyint:
|
|
dd ?;-
|
|
vk:
|
|
dd ?;-
|
|
va:
|
|
dd ?;-
|
|
va2:
|
|
dd ?;-
|
|
vdd:
|
|
dd ?;-
|
|
vx1:
|
|
dd ?;-
|
|
vx1b:
|
|
dd ?;-
|
|
vh:
|
|
dd ?;-
|
|
vdt:
|
|
dd ?;-
|
|
vheading: ; initial heading: 0 to 3599
|
|
dd ?;-
|
|
vacompare:
|
|
dd ?;-
|
|
vpxi:
|
|
dd ?;-
|
|
vpyi:
|
|
dd ?;-
|
|
wtolong:
|
|
dw ?,?;-,?;-
|
|
|
|
xtemp:
|
|
dd ?;-
|
|
ytemp:
|
|
dd ?;-
|
|
xfrac:
|
|
dd ?;-
|
|
yfrac:
|
|
dd ?;-
|
|
h_old:
|
|
dd ?;-
|
|
vbottom:
|
|
dd ?;-
|
|
mouseya:
|
|
dd ?;-
|
|
remeax:
|
|
dd ?;-
|
|
remebx:
|
|
dd ?;-
|
|
remecx:
|
|
dd ?;-
|
|
remedx:
|
|
dd ?;-
|
|
remedi:
|
|
dd ?;-
|
|
remesi:
|
|
dd ?;-
|
|
red:
|
|
dd ?;-
|
|
green:
|
|
dd ?;-
|
|
blue:
|
|
dd ?;-
|
|
pseudo:
|
|
dd ?;-
|
|
step1:
|
|
dd ?;-
|
|
step64:
|
|
dd ?;-
|
|
lasty:
|
|
dd ?;-
|
|
|
|
sinus rd 360*10
|
|
eosinus:
|