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Rev 1245 Rev 2984
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do_sinus:
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   .x	   equ	[ebp-8]
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   .y	   equ	[ebp-12]
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   .new_y  equ	[ebp-16]
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   .temp   equ	[ebp-20]
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   push    ebp
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   mov	   ebp,esp
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   sub	   esp,64
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   mov	   dword .x,0
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   mov	   dword .y,0
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   mov	   esi,[screen_ptr]
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   mov	   edi,[Zbuffer_ptr]
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   push    edi
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   ;  clear Zbuffer temporally used as image buffer
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   mov	   ecx,SIZE_X*SIZE_Y
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   xor	   eax,eax
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   cld
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   rep	   stosd
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   pop	   edi
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;   movzx   eax,[sinus_flag]
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;   mov     edx,10
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;   mul     edx
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;   mov     [sin_amplitude],eax
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;   mov     [sin_frq],eax
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   fninit
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;if Ext = SSE2
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;   movups  xmm1,[const0123]   ; xmm1 - init values
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;   mov     eax,0x000000ff
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;   movd    xmm2,eax
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;   shufps  xmm2,xmm2,0        ; xmm2 - mask value
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;   mov     eax,4
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;   movd    xmm3,eax
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;   shufps  xmm3,xmm3,0
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 .again:
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if  0
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   fild    dword .x
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   fidiv   [sin_frq]
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   fsin
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   fimul   [sin_amplitude]
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   fiadd   dword .y
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   fistp   dword .new_y
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else
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   fild    dword .x
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   fmul    [sin_frq]
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   fistp   dword .temp
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   mov	   eax, .temp
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;   mov     bx, [angle_x]
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;   add     bx, [angle_y]
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;   movzx   ebx,bx
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;   shr     ebx,1       ; change phase
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;   add     eax,ebx
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   and	   eax, 0x000000ff
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;   cdq
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 ;  mul     [sin_frq]
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;   and      eax,0x000000ff
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;   and     ax,0x00ff
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;   cwde
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   fld	   dword [sin_tab+eax*4]
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   fimul   dword [sin_amplitude]
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   fiadd   dword .y
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   fistp   dword .new_y
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end if
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   mov	   eax,.new_y
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   or	   eax,eax
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   jl	   .skip
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   cmp	   eax,SIZE_Y
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   jg	   .skip
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;   mov     edx,SIZE_X
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;   mul     edx
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   shl	   eax,9
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   add	   eax,dword .x
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   lea	   ebx,[eax*3]
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   mov	   eax,[esi]
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   mov	   [edi+ebx],eax
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 .skip:
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   add	   esi,3
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   inc	   dword .x
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   cmp	   dword .x,SIZE_X
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   jl	   .again
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   mov	   dword .x,0
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   inc	   dword .y
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   cmp	   dword .y,SIZE_Y
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   jl	   .again
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   ; copy from temporary buffer -> Zbuffer to screen
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   mov	   esi,[Zbuffer_ptr]
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   mov	   edi,[screen_ptr]
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   mov	   ecx,SIZE_X*SIZE_Y*3/4
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   cld
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   rep	   movsd
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   mov	   esp,ebp
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   pop	   ebp
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ret
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draw_dots:
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draw_dots:
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   mov	   esi,[points_translated_ptr]
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   mov	   esi,[points_translated_ptr]
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   movzx   ecx,[points_count_var]
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   movzx   ecx,[points_count_var]
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 .drw:
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 .drw:
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 @@:
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 @@: