projection.c

用brew开发3D的例程

					(clipRect.dy)--;
			}

			I3D_SetClipRect(pMe->m_p3D, &clipRect);
			
			break;
		

		default:
			return FALSE;
		}
	
	return TRUE;

	case EVT_KEY:
			
		switch(wParam)
		{
					
			case AVK_1:
				pMe->clipRectOp = UPPER_LX;
				break;

			case AVK_2:
				pMe->clipRectOp = UPPER_LY;
				break;

			case AVK_3:
				pMe->clipRectOp = CLIP_WIDTH;
				break;

			case AVK_4:
				pMe->clipRectOp = CLIP_HEIGHT;
				break;

					
			// Show/Hide Commands
			case AVK_POUND:
				if(pMe->showHelp == FALSE)
					pMe->showHelp = TRUE;
				else if(pMe->showHelp == TRUE)
					pMe->showHelp = FALSE;
				break;

			case AVK_CLR:
				/* 
					User request to return to previous state. Set the next state, 
					and a flag, and wait until the current frame finishes rendering 
					before switching states. For information on why we do this, 
					read the comment in the parent event handler for the AVK_CLR event.
				*/
				// User changed the clipping rect, so restore the old one.
				I3D_SetClipRect(pMe->m_p3D, &pMe->screen3DRect);
				pMe->nextState = STATE_PROJECTION;
				pMe->changeState = TRUE;
				break;
			default:
				return FALSE;
		}
		return TRUE;


	case EVT_COMMAND:
	
	return TRUE;

	default:
			return FALSE;


	}

}

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

FUNCTION 
	OnProjectionFocal

DESCRIPTION
	 This function is called when the focal length menu item is selected. 
	 Anything to do when first entering this tutorial should be done here, 
	 ie. tutorial specific initializations. 

PROTOTYPE:
	static boolean OnProjectionFocal(TutorI3D* pMe)

PARAMETERS:
	pMe [In] : Pointer to TutorI3D sturcture
	
DEPENDENCIES
  none

RETURN VALUE
  TRUE: If succeded
  FALSE: If there was an error

SIDE EFFECTS
  none
===========================================================================*/
static boolean OnProjectionFocal(TutorI3D* pMe)
{
	return TRUE;
}



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

FUNCTION 
	OnProjectionViewDepth

DESCRIPTION
	 This function is called when the view depth menu item is selected. 
	 Anything to do when first entering this tutorial should be done here, 
	 ie. tutorial specific initializations. 

PROTOTYPE:
	static boolean OnProjectionViewDepth(TutorI3D* pMe)

PARAMETERS:
	pMe [In] : Pointer to TutorI3D sturcture
	
DEPENDENCIES
  none

RETURN VALUE
  TRUE: If succeded
  FALSE: If there was an error

SIDE EFFECTS
  none
===========================================================================*/
static boolean OnProjectionViewDepth(TutorI3D* pMe)
{
	return TRUE;
}


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

FUNCTION 
	OnProjectionScreenMapping

DESCRIPTION
	 This function is called when the screem mapping menu item is selected. 
	 Anything to do when first entering this tutorial should be done here, 
	 ie. tutorial specific initializations. 

PROTOTYPE:
	static boolean OnProjectionScreenMapping(TutorI3D* pMe)

PARAMETERS:
	pMe [In] : Pointer to TutorI3D sturcture
	
DEPENDENCIES
  none

RETURN VALUE
  TRUE: If succeded
  FALSE: If there was an error

SIDE EFFECTS
  none
===========================================================================*/

static boolean OnProjectionScreenMapping(TutorI3D* pMe)
{
	return TRUE;
}

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

FUNCTION 
	OnProjectionClipRect

DESCRIPTION
	 This function is called when the clipping rect menu item is selected. 
	 Anything to do when first entering this tutorial should be done here, 
	 ie. tutorial specific initializations. 

PROTOTYPE:
	static boolean OnProjectionClipRect(TutorI3D* pMe)

PARAMETERS:
	pMe [In] : Pointer to TutorI3D sturcture
	
DEPENDENCIES
  none

RETURN VALUE
  TRUE: If succeded
  FALSE: If there was an error

SIDE EFFECTS
  none
===========================================================================*/
static boolean OnProjectionClipRect(TutorI3D* pMe)
{
	AEERect initClipRect;
	
	// setup the initial clipping rectangle, as something smaller than
	// the entire screen. 
	SETAEERECT(&initClipRect, pMe->di.cxScreen/4,DRAWING_AREA_3D_HEIGHT/4,
			   60,60);

	I3D_SetClipRect(pMe->m_p3D, &initClipRect);

	return TRUE;
}


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

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


void ProjectionFocalManipulateBuf(TutorI3D* pMe)
{

	AECHAR szBuf[50];
	char chBuf[50];
	RGBVAL rgb;
	uint16 fl;
	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);
	
	
	SPRINTF(chBuf, "I3D_SetFocalLength(flength)" );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	outputColorText(pMe, szBuf, 19, 7, 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);
	
	
	I3D_GetFocalLength(pMe->m_p3D, &fl);

	
	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	SPRINTF(chBuf, "flength = %d", fl );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText, -1, maxWidth,
					&textWidth );

	
	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_CENTER| 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: + flength", szBuf, sizeof(szBuf));
		nLine += outputMultiLineStr(pMe, szBuf, -1, xText,
						yText + nLine*pMe->charHeight, 
						-1, pMe->di.cxScreen -5, &textWidth);
		
		STR_TO_WSTR("Down: - flength", 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: ProjectionViewDepthManipulateBuf
  
	DESCRIPTION
	   This function adds text and 2D graphics to the frame buffer after
	   3D frame render is complete for the view depth tutorial.
	  
	PROTOTYPE:
	  void ProjectionViewDepthManipulateBuf(TutorI3D* pMe)
		
	PARAMETERS:
	  pMe: [in]: Pointer to TutorI3D sturcture
	  		  
	DEPENDENCIES
	  none
				  
	RETURN VALUE
	  none
					
	SIDE EFFECTS
	  none
===========================================================================*/

void ProjectionViewDepthManipulateBuf(TutorI3D* pMe)
{

	AECHAR szBuf[50];
	char chBuf[50];
	uint16 nz,fz;
	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);
	
	
	SPRINTF(chBuf, "I3D_SetViewDepth(nearPln,farPln)" );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	outputColorText(pMe, szBuf, 17, 14, 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);
	
	
	I3D_GetViewDepth(pMe->m_p3D, &nz, &fz);
	
	if(pMe->viewDepthPlane == NEAR_PLANE)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}
	

	SPRINTF(chBuf, "nearPln = %d", nz );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText, -1, maxWidth,
					&textWidth );

	if(pMe->viewDepthPlane == NEAR_PLANE)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	else if(pMe->viewDepthPlane == FAR_PLANE)
	{
		rgb1 = IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, ITEM_SELECT_COLOR);
	}
	
	SPRINTF(chBuf, "farPln = %d", fz );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
					   -1, maxWidth, &textWidth );
	
	if(pMe->viewDepthPlane == FAR_PLANE)
	{
		IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, rgb1);
	}
	
	IDISPLAY_SetColor(pMe->a.m_pIDisplay, CLR_USER_TEXT, CLR_BLACK);


	SPRINTF(chBuf, "Model Z = %d", pMe->translateVector.z >> 16 );
	STR_TO_WSTR (chBuf, szBuf, sizeof(szBuf));
	nLine += outputMultiLineStr(pMe, szBuf, -1, xText, yText + nLine*pMe->charHeight, 
								-1, maxWidth, &textWidth );

	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_CENTER | 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));