cube3dview.cpp

这是我做的一个VC++小程序

// Cube3dView.cpp : implementation of the CCube3dView class
//

#include "stdafx.h"
#include "Cube3d.h"

#include "Cube3dDoc.h"
#include "Cube3dView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#include "TypedStack.h"
#include "Cube.h"
#include "PRender.h"

/////////////////////////////////////////////////////////////////////////////
// CCube3dView

IMPLEMENT_DYNCREATE(CCube3dView,  CView)

BEGIN_MESSAGE_MAP(CCube3dView,  CView)
	//{{AFX_MSG_MAP(CCube3dView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCube3dView construction/destruction

CCube3dView::CCube3dView()
{
}

CCube3dView::~CCube3dView()
{
}

BOOL CCube3dView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CCube3dView drawing

void CCube3dView::OnDraw(CDC* pDC)
{
	// TODO: add draw code for native data here
	
	
	//第一步, 创建一个内存设备对象
	//获取客户区大小
	CRect rect;
	GetClientRect(&rect);
	int nClientWidth = rect.Width();
	int nClientHeight = rect.Height();


	//建立一个内存设备
	//内存设备及其初始化
	CDC memDC;
	memDC.CreateCompatibleDC(pDC);

	CBitmap bitmap;
	bitmap.CreateCompatibleBitmap(pDC,  nClientWidth,  nClientHeight);
	CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);
	CBrush* pBrush = new CBrush(RGB(0, 0, 0));
	memDC.FillRect(rect, pBrush);
	delete pBrush;

	//绘制立方体

	//第二步, 申明一个立方体对象, 并且申明它的颜色需要外部指定
	CCube* pCube = new CCube(0.8f, 1.3f, 0.8f);
	pCube->SetAutoColorProperty(FALSE);

	//第三步, 设置绘制属性

	//要注意, 我们这里采用的是手动的方法设置颜色
	//因而, 我们可以把这一步放在几何之前.从而方便后面的克隆

	//设置顶点颜色
	FLOATCOLORRGBA  clrVertex[8] = {
		{0.0f,   1.0f,   0.0f,   1.0f},   {0.0f,  1.0f,  1.0f,  1.0f}, 
		{0.0f,   0.0f,   0.0f,   1.0f},   {0.0f,  0.0f,  1.0f,  1.0f}, 
		{1.0f,   0.0f,   0.0f,   1.0f},   {1.0f,  1.0f,  0.0f,  1.0f}, 
		{1.0f,   1.0f,   1.0f,   1.0f},   {1.0f,  0.0f,  1.0f,  1.0f}};

	for(int i = 0; i < 8; i++)
		pCube->SetVertexColor(i, clrVertex[i]);

	//设置边颜色
	for(i = 0; i < 12; i++)
		pCube->SetEdgeColor(i, 1.0f, 0.0f, 0.0f);


	//设置小面颜色
	FLOATCOLORRGBA clrFacet[6] = {
		{1.0f,   1.0f,   1.0f,   1.0f},  {1.0f,  1.0f,  1.0f,  1.0f}, 
		{0.38f,  0.38f,  0.38f,  1.0f},  {0.8f,  0.8f,  0.8f,  1.0f},  
		{0.38f,  0.38f,  0.38f,  1.0f},  {0.8f,  0.8f,  0.8f,  1.0f}};

	for(i = 0; i < 6; i++)
		pCube->SetFacetColor(i, clrFacet[i]);


	//第四步, 组织场景, 进行几何变换

	//构造一个矩阵堆栈
	CTypedStack<CMatrix3d> matrixStack;
	
	//变换矩阵
	CMatrix3d mGeometry;

	//压入单位矩阵(起示例作用)
	matrixStack.Push(mGeometry);
		mGeometry.RotateY(25.0f);
		mGeometry.RotateX(35.0f);

		mGeometry.RotateZ(-15.0f);
		mGeometry.Translate(2.0f,  0.0f,  0.0f);
		matrixStack.Push(mGeometry);
			mGeometry.Translate(-1.3f,  0.0f,  0.0f);
			matrixStack.Push(mGeometry);
				mGeometry.Translate(-1.3f,  0.0f,  0.0f);
				matrixStack.Push(mGeometry);

				//申明两个克隆体, 注意, 克隆时, 连位置一起克隆
				//此时, pCube的位置在原始位置
				CCube* pCube1 = pCube->Clone();
				CCube* pCube2 = pCube->Clone();
				
				//弹出
				pCube2->Transform(matrixStack.Pop());
			pCube1->Transform(matrixStack.Pop());
		pCube->Transform(matrixStack.Pop());
	//弹出单位矩阵
	matrixStack.Pop();
	

	//第五步, 设置观察点和取景器(置于 Z 轴上)
	VERTEX3D viewer = {0.0f,  0.0f,  8.0f};

	//视口变换中进行放大处理, 屏幕位置距离视点100个单位;
	//透视中心(屏幕坐标)为(180, 150)
	VIEWFINDER viewFinder = {100.0f,  8.0f,  8.0f,  {180,  150}};
	
	//第五步, 着色
	CPRender renderer;

	//线框模型
	renderer.Render(&memDC,  pCube,  viewer,  viewFinder,  G3D_RENDER_WIRE);

	//刻面模型
	renderer.Render(&memDC,  pCube1,  viewer,  viewFinder,  G3D_RENDER_FLAT);

	//光滑明暗模型
	renderer.Render(&memDC,  pCube2,  viewer,  viewFinder,  G3D_RENDER_GOURAUD_SMOOTH);

	//第七步, 显示结果
	pDC->BitBlt(0,  0,  nClientWidth,  nClientHeight,  &memDC,  0,  0,  SRCCOPY);	

	//第八步, 复原CDC属性
	memDC.SelectObject(pOldBitmap);
	bitmap.DeleteObject();
	delete pCube;
	delete pCube1;
	delete pCube2;

}

/////////////////////////////////////////////////////////////////////////////
// CCube3dView diagnostics

#ifdef _DEBUG
void CCube3dView::AssertValid() const
{
	CView::AssertValid();
}

void CCube3dView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CCube3dDoc* CCube3dView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CCube3dDoc)));
	return (CCube3dDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CCube3dView message handlers