| 0,0 → 1,199 |
|---|
| ; |
| ; Ôóíêöèè äëÿ èçìåíåíèÿ âîêñåëüíîé òàáëèöû. |
| ; Â âîêñåëüíîé òàáëèöå ñîäåðæàòñÿ 8 öèôð, |
| ; êîòîðûå çàäàþò íàïðàâëåíèå äëÿ ðàñïîëîæåíèÿ |
| ; äî÷åðíèõ âîêñåëåé. Èçìåíÿÿ öèôðû â ýòîé òàáëèöå |
| ; ìîæíî ïîëó÷èòü ïîâîðîòû è çåðêàëüíûå îòîáðàæåíèÿ |
| ; âîêñåëüíîãî èçîáðàæåíèÿ. |
| ; |
| ; Ñõåìà íóìåðàöèè óãëîâ â òàáëèöå: |
| ; 4 |
| ; 5 6 |
| ; | 7 | |
| ; | 0 | |
| ; 1 2 |
| ; 3 |
| ; ãäå: |
| ; 0-1 îñü x |
| ; 0-2 îñü y |
| ; 0-4 îñü z |
| |
| ; ïîâîðîò âîêðóã îñè z |
| align 4 |
| proc vox_obj_rot_z uses eax ebx ecx, v_obj:dword |
| mov ebx,[v_obj] |
| add ebx,vox_offs_tree_table |
| |
| ;(1) |
| call vox_tbl_copy |
| |
| ;(2) |
| ;0 -> 1 4 -> 5 |
| ;^ | ^ | |
| ;2 <- 3 6 <- 7 |
| |
| mov edx,dword[eax] |
| mov byte[eax+1],dl ;0->1 |
| mov byte[eax+3],dh ;1->3 |
| shr edx,16 |
| mov byte[eax],dl ;2->0 |
| mov byte[eax+2],dh ;3->2 |
| |
| mov edx,dword[eax+4] |
| mov byte[eax+5],dl ;4->5 |
| mov byte[eax+7],dh ;5->7 |
| shr edx,16 |
| mov byte[eax+4],dl ;6->4 |
| mov byte[eax+6],dh ;7->6 |
| |
| ;(3) |
| call vox_tbl_paste |
| |
| ret |
| endp |
| |
| ; ïîâîðîò âîêðóã îñè y |
| align 4 |
| proc vox_obj_rot_y uses eax ebx ecx, v_obj:dword |
| mov ebx,[v_obj] |
| add ebx,vox_offs_tree_table |
| |
| ;(1) |
| call vox_tbl_copy |
| |
| ;(2) |
| ;0 -> 4 1 -> 5 |
| ;^ | ^ | |
| ;2 <- 6 3 <- 7 |
| |
| mov edx,dword[eax] |
| mov ecx,dword[eax+4] |
| |
| mov byte[eax+4],dl ;0->4 |
| mov byte[eax+5],dh ;1->5 |
| shr edx,16 |
| mov byte[eax+0],dl ;2->0 |
| mov byte[eax+1],dh ;3->1 |
| |
| mov byte[eax+6],cl ;4->6 |
| mov byte[eax+7],ch ;5->7 |
| shr ecx,16 |
| mov byte[eax+2],cl ;6->2 |
| mov byte[eax+3],ch ;7->3 |
| |
| ;(3) |
| call vox_tbl_paste |
| ret |
| endp |
| |
| ; ïîâîðîò âîêðóã îñè x |
| align 4 |
| proc vox_obj_rot_x uses eax ebx ecx, v_obj:dword |
| mov ebx,[v_obj] |
| add ebx,vox_offs_tree_table |
| |
| ;(1) |
| call vox_tbl_copy |
| |
| ;(2) |
| ;0 -> 4 2 -> 6 |
| ;^ | ^ | |
| ;1 <- 5 3 <- 7 |
| |
| mov edx,dword[eax] |
| mov ecx,dword[eax+4] |
| |
| mov byte[eax+4],dl ;0->4 |
| mov byte[eax+0],dh ;1->0 |
| shr edx,16 |
| mov byte[eax+6],dl ;2->6 |
| mov byte[eax+2],dh ;3->2 |
| |
| mov byte[eax+5],cl ;4->5 |
| mov byte[eax+1],ch ;5->1 |
| shr ecx,16 |
| mov byte[eax+7],cl ;6->7 |
| mov byte[eax+3],ch ;7->3 |
| |
| ;(3) |
| call vox_tbl_paste |
| ret |
| endp |
| |
| |
| ;input: |
| ; ebx = vox_offs_tree_table |
| align 4 |
| vox_tbl_copy: |
| ;(1) |
| mov eax,txt_buf |
| |
| movzx ecx,byte[ebx] |
| add ecx,eax |
| mov byte[ecx],0 |
| |
| movzx ecx,byte[ebx+1] |
| add ecx,eax |
| mov byte[ecx],1 |
| |
| movzx ecx,byte[ebx+2] |
| add ecx,eax |
| mov byte[ecx],2 |
| |
| movzx ecx,byte[ebx+3] |
| add ecx,eax |
| mov byte[ecx],3 |
| |
| movzx ecx,byte[ebx+4] |
| add ecx,eax |
| mov byte[ecx],4 |
| |
| movzx ecx,byte[ebx+5] |
| add ecx,eax |
| mov byte[ecx],5 |
| |
| movzx ecx,byte[ebx+6] |
| add ecx,eax |
| mov byte[ecx],6 |
| |
| movzx ecx,byte[ebx+7] |
| add ecx,eax |
| mov byte[ecx],7 |
| ret |
| |
| ;input: |
| ; ebx = vox_offs_tree_table |
| align 4 |
| vox_tbl_paste: |
| movzx ecx,byte[eax] |
| add ecx,ebx |
| mov byte[ecx],0 |
| |
| movzx ecx,byte[eax+1] |
| add ecx,ebx |
| mov byte[ecx],1 |
| |
| movzx ecx,byte[eax+2] |
| add ecx,ebx |
| mov byte[ecx],2 |
| |
| movzx ecx,byte[eax+3] |
| add ecx,ebx |
| mov byte[ecx],3 |
| |
| movzx ecx,byte[eax+4] |
| add ecx,ebx |
| mov byte[ecx],4 |
| |
| movzx ecx,byte[eax+5] |
| add ecx,ebx |
| mov byte[ecx],5 |
| |
| movzx ecx,byte[eax+6] |
| add ecx,ebx |
| mov byte[ecx],6 |
| |
| movzx ecx,byte[eax+7] |
| add ecx,ebx |
| mov byte[ecx],7 |
| ret |