projection.c

用brew开发3D的例程

		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText+nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("1: near plane", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);
		
		STR_TO_WSTR("2: far plane", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("#: show/hide help", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

	}

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb);

}


/*===========================================================================

  FUNCTION: ProjectionScreenMapManipulateBuf
  
	DESCRIPTION
	   This function adds text and 2D graphics to the frame buffer after
	   3D frame render is complete for the screen mapping tutorial.
	  
	PROTOTYPE:
	  void ProjectionScreenMapManipulateBuf(TutorI3D* pMe)
		
	PARAMETERS:
	  pMe: [in]: Pointer to TutorI3D sturcture
	  		  
	DEPENDENCIES
	  none
				  
	RETURN VALUE
	  none
					
	SIDE EFFECTS
	  none
===========================================================================*/
void ProjectionScreenMapManipulateBuf(TutorI3D* pMe)
{

	AECHAR szBuf[50];
	char chBuf[50];
	int32 xscale, yscale;
	int32 xshift, yshift;
	
	AEEClip currentClipGraphics;
	AEEClip screenClip;
	AEERect currentClipRectDisplay;
	
	// for drawing the origin point
	AEEPoint	origin;
	uint8		oldPointSize;
	
	
	RGBVAL rgb=0; 
	RGBVAL rgb1=0;
	int textWidth;

	int nLine=0;	// # of lines used to output text
	int maxWidth;
	int xText;
	int yText;

	if(!pMe)
		return;

	TutorI3D_SetTopMenuTextValues(pMe, &xText, &yText, &maxWidth);

	TutorI3D_SetupTutorialWindow(pMe);
						
	rgb = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_API_TEXT);
	
	// change max width for the title output (because of long text width)
	maxWidth = pMe->di.cxScreen;
	
	SPRINTF(chBuf, "I3D_SetScreenMapping(sx,sy,sfx,sfy)" );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	outputColorText(pMe, szBuf, 21, 13, xText, yText, 
			maxWidth, CLR_API_VAR_TEXT);

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, MENU_TEXT_CLR );
	
	maxWidth = pMe->di.cxScreen - 5;

	
	// We need to set the IGRAPHICS and IDISPLAY clip rects here in order 
	// to draw the point and the associated text only in the 3D draw area.
	// Get the original IGRAPHICS and IDISPLAY clip area, and set the new
	// area. 
	IGRAPHICS_GetClip(pMe->m_pGraphics, &currentClipGraphics);
	makeAEEClipRectFromRect(&pMe->screenAPI3DRect, &screenClip );
	IGRAPHICS_SetClip(pMe->m_pGraphics, &screenClip, (uint8) NULL);

	IDISPLAY_GetClipRect(pMe->a.m_pIDisplay, &currentClipRectDisplay);
	IDISPLAY_SetClipRect(pMe->a.m_pIDisplay, &pMe->screenAPI3DRect);
	
	I3D_GetScreenMapping(pMe->m_p3D, &xscale, &yscale, &xshift, &yshift);

	// this is the new 3D origin taking into account the screen mapping
	origin.x = (int16) xshift;
	origin.y = (int16) yshift;

	// draw a point at the origin
	oldPointSize = IGRAPHICS_GetPointSize(pMe->m_pGraphics);
	IGRAPHICS_SetPointSize(pMe->m_pGraphics, 5);
	IGRAPHICS_SetColor(pMe->m_pGraphics, 100, 100, 200, 255);
	IGRAPHICS_DrawPoint(pMe->m_pGraphics, &origin);
	IGRAPHICS_SetColor(pMe->m_pGraphics, 0,0,0,255);
	IGRAPHICS_SetPointSize(pMe->m_pGraphics, oldPointSize);

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, MAKE_RGB(100,100,200));
	STR_TO_WSTR("I3D Origin", szBuf, sizeof(szBuf));
	IDISPLAY_DrawText(pMe->a.m_pIDisplay, AEE_FONT_BOLD, szBuf,
					  -1, origin.x + 2, origin.y - 10, NULL, 
					  IDF_TEXT_TRANSPARENT);

	// restore the original clip areas
	IGRAPHICS_SetClip(pMe->m_pGraphics, &currentClipGraphics, (uint8) NULL);
	IDISPLAY_SetClipRect(pMe->a.m_pIDisplay, &currentClipRectDisplay);


	// Now draw the tutorial information in the bottom menu. 
	// First set the initial output point for the text and maxWidth. 
	TutorI3D_SetBottomMenuTextValues(pMe,&xText,&yText,&maxWidth);


	//IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_API_VAR_TEXT );
	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, MENU_TEXT_CLR );

	if(pMe->screenMapOp == XSCALE)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}

	SPRINTF(chBuf, "x scale: sx = %d", xscale );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText, -1, maxWidth,
								&textWidth );

	if(pMe->screenMapOp == XSCALE)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->screenMapOp == YSCALE)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}
	
	SPRINTF(chBuf, "y scale: sy = %d", yscale );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
								-1, maxWidth, &textWidth );
	
	if(pMe->screenMapOp == YSCALE)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->screenMapOp == XSHIFT)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}


	SPRINTF(chBuf, "x shift: sfx = %d", xshift );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );
	
	if(pMe->screenMapOp == XSHIFT)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->screenMapOp == YSHIFT)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}

	SPRINTF(chBuf, "y shift: sfy = %d", yshift );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );

	if(pMe->screenMapOp == YSHIFT)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}



	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_BLACK);

	STR_TO_WSTR("Press '#' for Help", szBuf, sizeof(szBuf));
	IDISPLAY_DrawText(pMe->a.m_pIDisplay, AEE_FONT_NORMAL, szBuf,
					  -1, 0, 0, NULL, IDF_ALIGN_RIGHT | IDF_ALIGN_BOTTOM | 
					  IDF_TEXT_TRANSPARENT);

	
	if(pMe->showHelp)
	{

		IDISPLAY_EraseRect(pMe->a.m_pIDisplay, &pMe->screenAPI3DRect);

		nLine = 0;
		xText = pMe->menuTopRect.x + 1;
		yText = pMe->menuTopRect.y + pMe->menuTopRect.dy + 5;


		STR_TO_WSTR("Up: +", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText+nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("Down: -", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText+nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("1: x scale", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);
		
		STR_TO_WSTR("2: y scale", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("3: x shift", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("4: y shift", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("#: show/hide help", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

	}

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb);

}


/*===========================================================================

  FUNCTION: ProjectionClipRectManipulateBuf
  
	DESCRIPTION
	   This function adds text and 2D graphics to the frame buffer after
	   3D frame render is complete for the clipping rectangle tutorial.
	  
	PROTOTYPE:
	  void ProjectionClipRectManipulateBuf(TutorI3D* pMe)
		
	PARAMETERS:
	  pMe: [in]: Pointer to TutorI3D sturcture
	  		  
	DEPENDENCIES
	  none
				  
	RETURN VALUE
	  none
					
	SIDE EFFECTS
	  none
===========================================================================*/
void ProjectionClipRectManipulateBuf(TutorI3D* pMe)
{

	AECHAR szBuf[50];
	char chBuf[50];
	AEERect clipRect;
	RGBVAL rgb=0;
	RGBVAL rgb1=0;
	int textWidth;

	int nLine=0;	// # of lines used to output text
	int maxWidth;
	int xText;
	int yText;

	if(!pMe)
		return;

	TutorI3D_SetTopMenuTextValues(pMe, &xText, &yText, &maxWidth);

	TutorI3D_SetupTutorialWindow(pMe);

	
	I3D_GetClipRect(pMe->m_p3D, &clipRect);
	// draw the clip rect borders
	IDISPLAY_DrawRect(pMe->a.m_pIDisplay, &clipRect, CLR_BLACK, 
						(RGBVAL) NULL, IDF_RECT_FRAME);
					
	rgb = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_API_TEXT);
	
	
	SPRINTF(chBuf, "I3D_SetClipRect(rect)" );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	outputColorText(pMe, szBuf, 16, 4, xText, yText, 
			maxWidth, CLR_API_VAR_TEXT);

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, MENU_TEXT_CLR );
		
	// Now draw the tutorial information in the bottom menu. 
	// First set the initial output point for the text and maxWidth. 
	TutorI3D_SetBottomMenuTextValues(pMe,&xText,&yText,&maxWidth);
	
	if(pMe->clipRectOp == UPPER_LX)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}

	SPRINTF(chBuf, "left x: rect.x =  %d", clipRect.x );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText, -1, maxWidth,
					&textWidth );

	if(pMe->clipRectOp == UPPER_LX)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->clipRectOp == UPPER_LY)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}
	
	SPRINTF(chBuf, "top y: rect.y = %d", clipRect.y );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );
	
	if(pMe->clipRectOp == UPPER_LY)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->clipRectOp == CLIP_WIDTH)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}


	SPRINTF(chBuf, "width: rect.dx = %d", clipRect.dx );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );
	
	if(pMe->clipRectOp == CLIP_WIDTH)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->clipRectOp == CLIP_HEIGHT)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}

	SPRINTF(chBuf, "height: rect.dy = %d", clipRect.dy );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );

	if(pMe->clipRectOp == CLIP_HEIGHT)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}

	
	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_BLACK);

	STR_TO_WSTR("Press '#' for Help", szBuf, sizeof(szBuf));
	IDISPLAY_DrawText(pMe->a.m_pIDisplay, AEE_FONT_NORMAL, szBuf,
					  -1, 0, 0, NULL, IDF_ALIGN_RIGHT | IDF_ALIGN_BOTTOM |
					  IDF_TEXT_TRANSPARENT);
	
	if(pMe->showHelp)
	{

		IDISPLAY_EraseRect(pMe->a.m_pIDisplay, &pMe->screenAPI3DRect); 

		nLine = 0;
		xText = pMe->menuTopRect.x + 1;
		yText = pMe->menuTopRect.y + pMe->menuTopRect.dy + 5;


		
		STR_TO_WSTR("Up: +", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText+nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("Down: -", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText+nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("1: left x", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);
		
		STR_TO_WSTR("2: top y", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("3: clip width", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("4: clip height", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

		STR_TO_WSTR("#: show/hide help", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);

	}

	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb);

}