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