| 708,36 → 708,38 |
|---|
| ;if (co==0) |
| mov edi,dword[edx+offs_vert_zp+offs_zbup_x] |
| sub edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
| mov dword[norm],edi |
| mov dword[norm],edi ;p2.x-p0.x |
| fild dword[norm] |
| mov edi,dword[ecx+offs_vert_zp+offs_zbup_y] |
| sub edi,dword[ebx+offs_vert_zp+offs_zbup_y] |
| mov dword[norm],edi |
| mov dword[norm],edi ;p1.y-p0.y |
| fimul dword[norm] |
| fchs |
| mov edi,dword[ecx+offs_vert_zp+offs_zbup_x] |
| sub edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
| mov dword[norm],edi |
| mov dword[norm],edi ;p1.x-p0.x |
| fild dword[norm] |
| mov edi,dword[edx+offs_vert_zp+offs_zbup_y] |
| sub edi,dword[ebx+offs_vert_zp+offs_zbup_y] |
| mov dword[norm],edi |
| mov dword[norm],edi ;p2.y-p0.y |
| fimul dword[norm] |
| fsubp |
| |
| faddp |
| ;st0 = (p1.zp.x-p0.zp.x)*(p2.zp.y-p0.zp.y) - (p2.zp.x-p0.zp.x)*(p1.zp.y-p0.zp.y) |
| |
| mov dword[front],0 |
| fldz |
| fcompp |
| ftst |
| fstsw ax |
| ffree st0 |
| fincstp |
| sahf |
| je .end_f |
| jbe @f ;jb @f ??? |
| inc dword[front] ;front = 0.0 > norm |
| jae @f |
| inc dword[front] ;front = norm < 0.0 |
| @@: |
| mov edi,[context] |
| mov eax,dword[edi+offs_cont_current_front_face] |
| xor dword[front],eax ;front ^= context.current_front_face |
| |
| ; back face culling |
| cmp dword[edi+offs_cont_cull_face_enabled],0 |
| je .els_1 |