3D图形编程

开发平台：
Visual C++

ZProject.cpp：源码内容
							// ZProject.cpp : implementation file
//
#include "stdafx.h"
#include "Test1.h"
#include "ZProject.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CZProject
extern GLfloat Databuf[ArrayOne][ArrayTwo];
extern bool gbIsGetData;
extern bool gbDataIsEmpty;
IMPLEMENT_DYNCREATE(CZProject, CView)
CZProject::CZProject()
{
}
CZProject::~CZProject()
{
}
BEGIN_MESSAGE_MAP(CZProject, CView)
	//{{AFX_MSG_MAP(CZProject)
	ON_WM_ERASEBKGND()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CZProject drawing
void CZProject::OnDraw(CDC* pDC)
{
	CDocument* pDoc = GetDocument();
	CRect rc;
	GetClientRect(&rc);
	pDC->SetTextAlign(TA_CENTER);
	pDC->SetTextColor(YELLOW);
	pDC->SetBkMode(1);
	CFont *OldFont = pDC->SelectObject(&this->m_pFr->m_13Font);
	
	CPen *pen = new CPen(PS_SOLID,1,GREEN);
	CPen *pOldPen = pDC->SelectObject(pen);	
	pDC->TextOut(rc.right/2,2,"Z轴投影-密度");
	//x轴
	pDC->MoveTo(10,rc.bottom-20);
	pDC->LineTo(rc.right-30,rc.bottom-20);
	pDC->MoveTo(rc.right-30,rc.bottom-20);
	pDC->LineTo(rc.right-30-5,rc.bottom-20-5);
	pDC->MoveTo(rc.right-30,rc.bottom-20);
	pDC->LineTo(rc.right-30-5,rc.bottom-20+5);
	//y轴
	pDC->MoveTo(10,rc.bottom-20);
	pDC->LineTo(10,25);
	pDC->MoveTo(10,25);
	pDC->LineTo(5,30);
	pDC->MoveTo(10,25);
	pDC->LineTo(15,30);
	this->DrawZCoordinate(pDC);
	this->ZProjection(pDC);
	pDC->SelectObject(pOldPen);
	pDC->SelectObject(OldFont);
	delete pen;
}
/////////////////////////////////////////////////////////////////////////////
// CZProject diagnostics
#ifdef _DEBUG
void CZProject::AssertValid() const
{
	CView::AssertValid();
}
void CZProject::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CZProject message handlers
BOOL CZProject::OnEraseBkgnd(CDC* pDC) 
{
	CBrush Brush (BLACK); 
    CBrush* pOldBrush = pDC->SelectObject(&Brush);     
	CRect ViewClip; 
	pDC->GetClipBox(&ViewClip);     
	pDC->PatBlt(ViewClip.left,ViewClip.top,ViewClip.Width(),ViewClip.Height(),PATCOPY);    
	pDC->SelectObject (pOldBrush );
	return TRUE;
}
void CZProject::OnInitialUpdate() 
{
	CView::OnInitialUpdate();
	
	this->m_pFr = (CMainFrame*)AfxGetApp()->m_pMainWnd;	
}
void CZProject::DrawZCoordinate(CDC *pDC)
{
	CRect rc;
	this->GetClientRect(&rc);
	pDC->SetTextAlign(TA_LEFT);
	pDC->TextOut(2,rc.bottom-15,"0");
	pDC->TextOut(rc.right-30,rc.bottom-25,"声波");
	pDC->TextOut(0,10,"中子");
}
void CZProject::ZProjection(CDC *pDC)
{
	if (::gbIsGetData)
		return;
	if (::gbDataIsEmpty)
		return;
	CRect rc;
	GetClientRect(&rc);
	for (int i=0; i<ArrayOne; i++)
	{
		if ((GLfloat)Databuf[i][0] >= this->m_pFr->m_pView->m_nMinDepth 
			&& (GLfloat)Databuf[i][0] <= this->m_pFr->m_pView->m_nMaxDepth )
		{
			pDC->SetPixel(Databuf[i][this->m_pFr->m_pView->m_First]/3-10
				,(rc.bottom-20) -( Databuf[i][this->m_pFr->m_pView->m_Second]*3+20 )
				,BLUE);
		}
	}
}

						