| 1,3 → 1,104 |
|---|
| do_sinus: |
| .x equ [ebp-8] |
| .y equ [ebp-12] |
| .new_y equ [ebp-16] |
| .temp equ [ebp-20] |
| push ebp |
| mov ebp,esp |
| sub esp,64 |
| mov dword .x,0 |
| mov dword .y,0 |
| mov esi,[screen_ptr] |
| mov edi,[Zbuffer_ptr] |
| push edi |
| ; clear Zbuffer temporally used as image buffer |
| mov ecx,SIZE_X*SIZE_Y |
| xor eax,eax |
| cld |
| rep stosd |
| pop edi |
| ; movzx eax,[sinus_flag] |
| ; mov edx,10 |
| ; mul edx |
| ; mov [sin_amplitude],eax |
| ; mov [sin_frq],eax |
| fninit |
| ;if Ext = SSE2 |
| ; movups xmm1,[const0123] ; xmm1 - init values |
| ; mov eax,0x000000ff |
| ; movd xmm2,eax |
| ; shufps xmm2,xmm2,0 ; xmm2 - mask value |
| ; mov eax,4 |
| ; movd xmm3,eax |
| ; shufps xmm3,xmm3,0 |
| .again: |
| if 0 |
| fild dword .x |
| fidiv [sin_frq] |
| fsin |
| fimul [sin_amplitude] |
| fiadd dword .y |
| fistp dword .new_y |
| else |
| fild dword .x |
| fmul [sin_frq] |
| fistp dword .temp |
| mov eax, .temp |
| ; mov bx, [angle_x] |
| ; add bx, [angle_y] |
| ; movzx ebx,bx |
| ; shr ebx,1 ; change phase |
| ; add eax,ebx |
| |
| |
| and eax, 0x000000ff |
| |
| ; cdq |
| ; mul [sin_frq] |
| ; and eax,0x000000ff |
| ; and ax,0x00ff |
| ; cwde |
| |
| fld dword [sin_tab+eax*4] |
| fimul dword [sin_amplitude] |
| fiadd dword .y |
| fistp dword .new_y |
| end if |
| mov eax,.new_y |
| or eax,eax |
| jl .skip |
| cmp eax,SIZE_Y |
| jg .skip |
| ; mov edx,SIZE_X |
| ; mul edx |
| shl eax,9 |
| add eax,dword .x |
| lea ebx,[eax*3] |
| mov eax,[esi] |
| mov [edi+ebx],eax |
| .skip: |
| add esi,3 |
| inc dword .x |
| cmp dword .x,SIZE_X |
| jl .again |
| mov dword .x,0 |
| inc dword .y |
| cmp dword .y,SIZE_Y |
| jl .again |
| |
| ; copy from temporary buffer -> Zbuffer to screen |
| mov esi,[Zbuffer_ptr] |
| mov edi,[screen_ptr] |
| mov ecx,SIZE_X*SIZE_Y*3/4 |
| cld |
| rep movsd |
| |
| |
| mov esp,ebp |
| pop ebp |
| ret |
| |
| |
| draw_dots: |
| mov esi,[points_translated_ptr] |
| movzx ecx,[points_count_var] |