376 lines
9.4 KiB
C++
376 lines
9.4 KiB
C++
// TestView.cpp : implementation of the CTestView class
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//
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#include "stdafx.h"
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#include "Test.h"
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#include "TestDoc.h"
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#include "TestView.h"
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#include "math.h"
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#define Round(d) int(floor(d + 0.5)) // 四舍五入宏定义
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#define PI 3.1415926 // 圆周率
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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/////////////////////////////////////////////////////////////////////////////
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// CTestView
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IMPLEMENT_DYNCREATE(CTestView, CView)
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BEGIN_MESSAGE_MAP(CTestView, CView)
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//{{AFX_MSG_MAP(CTestView)
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ON_WM_LBUTTONDOWN()
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ON_WM_RBUTTONDBLCLK()
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ON_WM_TIMER()
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ON_WM_KEYDOWN()
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ON_WM_ERASEBKGND()
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ON_COMMAND(IDM_PLAY, OnPlay)
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ON_UPDATE_COMMAND_UI(IDM_PLAY, OnUpdatePlay)
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//}}AFX_MSG_MAP
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// Standard printing commands
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ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
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ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
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ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
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END_MESSAGE_MAP()
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/////////////////////////////////////////////////////////////////////////////
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// CTestView construction/destruction
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CTestView::CTestView() {
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// TODO: add construction code here
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bPlay = FALSE;
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R = 1000.0, d = 800.0, Phi = 90.0, Theta = 0.0; // 视点位于正前方
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Near = 800.0, Far = 1200.0; // 近剪切面与远剪切面
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Alpha = 0.0;
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Beta = 0.0;
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}
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CTestView::~CTestView() {
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}
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BOOL CTestView::PreCreateWindow(CREATESTRUCT &cs) {
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// TODO: Modify the Window class or styles here by modifying
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// the CREATESTRUCT cs
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return CView::PreCreateWindow(cs);
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}
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/////////////////////////////////////////////////////////////////////////////
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// CTestView drawing
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void CTestView::OnDraw(CDC *pDC) {
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CTestDoc *pDoc = GetDocument();
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ASSERT_VALID(pDoc);
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// TODO: add draw code for native data here
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DoubleBuffer();
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}
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/////////////////////////////////////////////////////////////////////////////
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// CTestView printing
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BOOL CTestView::OnPreparePrinting(CPrintInfo *pInfo) {
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// default preparation
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return DoPreparePrinting(pInfo);
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}
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void CTestView::OnBeginPrinting(CDC * /*pDC*/, CPrintInfo * /*pInfo*/) {
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// TODO: add extra initialization before printing
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}
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void CTestView::OnEndPrinting(CDC * /*pDC*/, CPrintInfo * /*pInfo*/) {
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// TODO: add cleanup after printing
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}
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/////////////////////////////////////////////////////////////////////////////
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// CTestView diagnostics
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#ifdef _DEBUG
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void CTestView::AssertValid() const {
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CView::AssertValid();
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}
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void CTestView::Dump(CDumpContext &dc) const {
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CView::Dump(dc);
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}
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CTestDoc *CTestView::GetDocument() // non-debug version is inline
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{
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ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CTestDoc)));
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return (CTestDoc *)m_pDocument;
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}
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#endif //_DEBUG
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/////////////////////////////////////////////////////////////////////////////
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// CTestView message handlers
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void CTestView::ReadVertex() // 点表
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{
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// 顶点的三维坐标(x,y,z),立方体边长为2a
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double a = 150;
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V[0].z = 0;
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V[0].x = 0;
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V[0].y = 0;
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V[1].z = 100;
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V[1].x = 0;
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V[1].y = 0;
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V[2].z = 100;
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V[2].x = 200;
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V[2].y = 0;
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V[3].z = 0;
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V[3].x = 200;
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V[3].y = 0;
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V[4].z = 0;
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V[4].x = 0;
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V[4].y = 100;
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V[5].z = 100;
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V[5].x = 0;
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V[5].y = 100;
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V[6].z = 100;
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V[6].x = 200;
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V[6].y = 100;
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V[7].z = 0;
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V[7].x = 200;
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V[7].y = 100;
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V[8].z = 50;
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V[8].x = 0;
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V[8].y = 150;
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V[9].z = 50;
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V[9].x = 200;
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V[9].y = 150;
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}
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void CTestView::ReadFace() // 面表
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{
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// 面的顶点数、面的顶点索引号与面的颜色
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F[0].SetNum(4);
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F[0].vI[0] = 1;
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F[0].vI[1] = 2;
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F[0].vI[2] = 6;
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F[0].vI[3] = 5; // 前面
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F[1].SetNum(4);
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F[1].vI[0] = 0;
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F[1].vI[1] = 4;
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F[1].vI[2] = 7;
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F[1].vI[3] = 3; // 后面
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F[2].SetNum(5);
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F[2].vI[0] = 0;
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F[2].vI[1] = 1;
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F[2].vI[2] = 5;
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F[2].vI[3] = 8;
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F[2].vI[4] = 4; // 左面
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F[3].SetNum(5);
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F[3].vI[0] = 2;
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F[3].vI[1] = 3;
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F[3].vI[2] = 7;
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F[3].vI[3] = 9;
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F[3].vI[4] = 6; // 右面
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F[4].SetNum(4);
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F[4].vI[0] = 4;
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F[4].vI[1] = 8;
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F[4].vI[2] = 9;
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F[4].vI[3] = 7; // 顶面1
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F[5].SetNum(4);
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F[5].vI[0] = 0;
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F[5].vI[1] = 3;
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F[5].vI[2] = 2;
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F[5].vI[3] = 1; // 底面
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F[6].SetNum(4);
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F[6].vI[0] = 5;
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F[6].vI[1] = 6;
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F[6].vI[2] = 9;
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F[6].vI[3] = 8; // 顶面2
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F[0].fClr = CRGB(0.98, 0.68, 0.48);
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F[1].fClr = CRGB(0.29, 0.58, 0.38);
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F[2].fClr = CRGB(0.69, 0.27, 0.88);
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F[3].fClr = CRGB(0.92, 0.78, 0.68);
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F[4].fClr = CRGB(0.49, 0.38, 0.28);
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F[5].fClr = CRGB(0.89, 0.78, 0.68);
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F[6].fClr = CRGB(0.39, 0.28, 0.18);
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}
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void CTestView::InitParameter() // 透视变换参数初始化
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{
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k[1] = sin(PI * Theta / 180);
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k[2] = sin(PI * Phi / 180);
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k[3] = cos(PI * Theta / 180);
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k[4] = cos(PI * Phi / 180);
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k[5] = k[2] * k[3];
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k[6] = k[2] * k[1];
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k[7] = k[4] * k[3];
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k[8] = k[4] * k[1];
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ViewPoint.x = R * k[6]; // 用户坐标系的视点球坐标
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ViewPoint.y = R * k[4];
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ViewPoint.z = R * k[5];
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}
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void CTestView::PerProject(CP3 P) // 透视变换
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{
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CP3 ViewP;
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ViewP.x = k[3] * P.x - k[1] * P.z; // 观察坐标系三维坐标
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ViewP.y = -k[8] * P.x + k[2] * P.y - k[7] * P.z;
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ViewP.z = -k[6] * P.x - k[4] * P.y - k[5] * P.z + R;
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ScreenP.x = d * ViewP.x / ViewP.z; // 屏幕坐标系三维坐标
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ScreenP.y = Round(d * ViewP.y / ViewP.z);
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ScreenP.z = Far * (1 - Near / ViewP.z) / (Far - Near);
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}
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void CTestView::DoubleBuffer() // 双缓冲
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{
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CDC *pDC = GetDC();
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CRect rect; // 定义客户区
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GetClientRect(&rect); // 获得客户区的大小
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pDC->SetMapMode(MM_ANISOTROPIC); // pDC自定义坐标系
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pDC->SetWindowExt(rect.Width(), rect.Height()); // 设置窗口范围
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pDC->SetViewportExt(rect.Width(), -rect.Height()); // x轴水平向右，y轴垂直向上
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pDC->SetViewportOrg(rect.Width() / 2, rect.Height() / 2); // 屏幕中心为原点
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CDC MemDC; // 内存DC
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CBitmap NewBitmap, *pOldBitmap; // 内存中承载图像的临时位图
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MemDC.CreateCompatibleDC(pDC); // 建立与屏幕pDC兼容的MemDC
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NewBitmap.CreateCompatibleBitmap(pDC, rect.Width(), rect.Height()); // 创建兼容位图
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pOldBitmap = MemDC.SelectObject(&NewBitmap); // 将兼容位图选入MemDC
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MemDC.FillSolidRect(&rect, pDC->GetBkColor()); // 按原来背景填充客户区，否则是黑色
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MemDC.SetMapMode(MM_ANISOTROPIC); // MemDC自定义坐标系
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MemDC.SetWindowExt(rect.Width(), rect.Height());
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MemDC.SetViewportExt(rect.Width(), -rect.Height());
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MemDC.SetViewportOrg(rect.Width() / 2, rect.Height() / 2);
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DrawObject(&MemDC);
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pDC->BitBlt(-rect.Width() / 2, -rect.Height() / 2, rect.Width(), rect.Height(), &MemDC, -rect.Width() / 2, -rect.Height() / 2, SRCCOPY); // 将内存位图拷贝到屏幕
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MemDC.SelectObject(pOldBitmap); // 恢复位图
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NewBitmap.DeleteObject(); // 删除位图
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ReleaseDC(pDC); // 释放DC
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}
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void CTestView::DrawObject(CDC *pDC) {
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CPi3 Point[5]; // 透视投影后面的二维顶点数组
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CZBuffer *zbuf = new CZBuffer; // 申请内存
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zbuf->InitDeepBuffer(1000, 1000, 1000); // 初始化深度缓存器
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for (int nFace = 0; nFace < 7; nFace++) // 面循环
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{
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// 计算视向量和面法向量，判断是否需要绘制
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CP3 p0 = V[F[nFace].vI[0]];
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CP3 p1 = V[F[nFace].vI[1]];
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CP3 p2 = V[F[nFace].vI[2]];
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// 计算视向量
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CVector ViewVector(p0, ViewPoint);
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ViewVector = ViewVector.Normalize();
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// 计算面法向量
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CFace f;
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f.SetFaceNormal(p0, p1, p2);
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f.fNormal.Normalize();
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// 如果视向量和法向量的点积大于等于0，说明面朝向观察者，需要绘制
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if (Dot(ViewVector, f.fNormal) >= 0) {
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for (int nVertex = 0; nVertex < F[nFace].vN; nVertex++) // 顶点循环
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{
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PerProject(V[F[nFace].vI[nVertex]]); // 透视投影
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Point[nVertex] = ScreenP;
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Point[nVertex].c = F[nFace].fClr;
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}
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zbuf->SetPoint(Point, F[nFace].vN); // 设置顶点
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zbuf->CreateBucket(); // 建立桶表
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zbuf->CreateEdge(); // 建立边表
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zbuf->Gouraud(pDC); // 填充多边形
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zbuf->ClearMemory(); // 内存清理
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}
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}
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delete zbuf; // 释放内存
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}
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void CTestView::OnLButtonDown(UINT nFlags, CPoint point) // 鼠标左键函数
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{
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// TODO: Add your message handler code here and/or call default
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R = R + 100;
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InitParameter();
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Invalidate(FALSE);
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CView::OnLButtonDown(nFlags, point);
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}
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void CTestView::OnRButtonDblClk(UINT nFlags, CPoint point) // 鼠标右键函数
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{
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// TODO: Add your message handler code here and/or call default
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R = R - 100;
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InitParameter();
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Invalidate(FALSE);
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CView::OnRButtonDblClk(nFlags, point);
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}
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void CTestView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) {
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// TODO: Add your message handler code here and/or call default
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if (!bPlay) {
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switch (nChar) {
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case VK_UP:
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Alpha = -5;
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tran.RotateX(Alpha);
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break;
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case VK_DOWN:
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Alpha = 5;
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tran.RotateX(Alpha);
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break;
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case VK_LEFT:
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Beta = -5;
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tran.RotateY(Beta);
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break;
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case VK_RIGHT:
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Beta = 5;
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tran.RotateY(Beta);
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break;
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default:
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break;
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}
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Invalidate(FALSE);
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}
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CView::OnKeyDown(nChar, nRepCnt, nFlags);
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}
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void CTestView::OnTimer(UINT nIDEvent) // 动画时间函数
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{
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// TODO: Add your message handler code here and/or call default
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// Phi-=5;//设定步长
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Theta -= 5;
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InitParameter();
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Invalidate(FALSE);
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CView::OnTimer(nIDEvent);
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}
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void CTestView::OnPlay() // 菜单函数
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{
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// TODO: Add your command handler code here
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bPlay = bPlay ? FALSE : TRUE;
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if (bPlay) // 设置定时器
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SetTimer(1, 150, NULL);
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else
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KillTimer(1);
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}
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void CTestView::OnUpdatePlay(CCmdUI *pCmdUI) // 菜单控制函数
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{
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// TODO: Add your command update UI handler code here
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if (bPlay) {
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pCmdUI->SetCheck(TRUE);
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pCmdUI->SetText("停止");
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}
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else {
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pCmdUI->SetCheck(FALSE);
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pCmdUI->SetText("开始");
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}
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}
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BOOL CTestView::OnEraseBkgnd(CDC *pDC) {
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// TODO: Add your message handler code here and/or call default
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return TRUE;
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}
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void CTestView::OnInitialUpdate() {
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CView::OnInitialUpdate();
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// TODO: Add your specialized code here and/or call the base class
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ReadVertex();
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ReadFace();
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tran.SetMat(V, 8);
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InitParameter();
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}
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