lytgraphicsview.cpp

draw 2D and 3D basic graph with visual C++!

// LYTGraphicsView.cpp : implementation of the CLYTGraphicsView class
//

#include "stdafx.h"
#include "LYTGraphics.h"

#include "LYTGraphicsDoc.h"
#include "LYTGraphicsView.h"
#include "math.h"
#include "stdlib.h"
#include "time.h"
#include "LYTTHREE.h"
#define ROUND(a) int(a+0.5)
#define PI 3.1415926
#define WM_TRANSLATE WM_USER+100

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

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView

IMPLEMENT_DYNCREATE(CLYTGraphicsView, CView)

BEGIN_MESSAGE_MAP(CLYTGraphicsView, CView)
	//{{AFX_MSG_MAP(CLYTGraphicsView)
	ON_COMMAND(ID_DRAW_BEZIER, OnDrawBezier)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_RBUTTONDOWN()
	ON_COMMAND(ID_RESULT, OnResult)
	ON_COMMAND(ID_CLEAR, OnClear)
	ON_COMMAND(ID_LINE, OnLine)
	ON_COMMAND(ID_RECTANGLE, OnRectangle)
	ON_COMMAND(ID_ELLIPSE, OnEllipse)
	ON_COMMAND(ID_DUOBIANXING, OnDuobianxing)
	ON_COMMAND(ID_CLEAR1, OnClear1)
	ON_WM_LBUTTONUP()
	ON_WM_LBUTTONDBLCLK()
	ON_COMMAND(ID_DRAW_BYT, OnDrawByt)
	ON_COMMAND(ID_SCALE, OnScale)
	ON_COMMAND(ID_DRAW_ANGLE, OnDrawAngle)
	ON_COMMAND(ID_SCALE1, OnScale1)
	ON_COMMAND(ID_XSYMMETRY, OnXsymmetry)
	ON_COMMAND(ID_YSYMMETRY, OnYsymmetry)
	ON_COMMAND(ID_OSYMMETRY, OnOsymmetry)
	ON_COMMAND(ID_ROTATION_ORIGINAL, OnRotationOriginal)
	ON_COMMAND(ID_ROTATION_ANYPOINT, OnRotationAnypoint)
	ON_COMMAND(ID_SHEAR, OnShear)
	ON_COMMAND(ID_CLEAR_TWO, OnClearTwo)
	ON_COMMAND(ID_DRAW_CUBOID, OnDrawCuboid)
	ON_COMMAND(ID_THREE_TRANSLATE, OnThreeTranslate)
	ON_COMMAND(ID_THREE_SCALE, OnThreeScale)
	ON_COMMAND(ID_THREE_ROTATION, OnThreeRotation)
	ON_COMMAND(ID_THREE_REFLECT, OnThreeReflect)
	ON_COMMAND(ID_THREE_TWIST, OnThreeTwist)
	ON_COMMAND(ID_THREE_CLEAR, OnThreeClear)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
	ON_MESSAGE(WM_TRANSLATE,OnTranslate)//手工处理消息映射
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView construction/destruction

CLYTGraphicsView::CLYTGraphicsView()
/*不初始化会出现调试错误*/
{//初始化绘制bezier曲线的变量
	n=0;
    k=0;
    flag=0;
    flag2=0;
	// TODO: add construction code here
//以下初始化绘制基本图形的变量
	flag1=0;	
n1=0;
s=0;
//初始化绘制b样条曲线的变量
m_PN=0;
flag3=0;
//以下初始化二维图形及其变换的变量
s4=5;
flag4=0;
n4=0;
//以下初始化three维图形及其变换的变量
flag5=0;
point=new Point3D[8];
	model=0;
	for(int i=0;i<4;i++)
		for(int j=0;j<4;j++)
			matrix[i][j]=0;

}

CLYTGraphicsView::~CLYTGraphicsView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView drawing

void CLYTGraphicsView::OnDraw(CDC* pDC)
{
	CLYTGraphicsDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	if(flag==1)//绘制bezier曲线
	{
		pDC->SetTextColor(0xffff00);
	pDC->TextOut(400,50,"按鼠标左键开始");
    pDC->TextOut(400,80,"按鼠标右键结束");
	CPen pen(0,3,0xff0000);
	pDC->SelectObject(&pen);
		}
	else if(flag2) 
	{
		pDC->MoveTo(b(h-1,0,p));
        for(int i=0;i<=50;i++)
        pDC->LineTo(b(h-1,(float)i/50,p));
        flag2=0;
	}
	else if(flag4)//绘制三角形（二维图形及其变换）
	{
		CPen pen1(0,1,0xff0000),pen2(0,1,255);
	pDC->SelectObject(&pen1);
	//绘制坐标轴
    pDC->MoveTo(0,325);
    pDC->LineTo(1023,325);
    pDC->MoveTo(512,0);
    pDC->LineTo(512,650);
	/*转换坐标系*/
	pDC->SetMapMode(MM_ISOTROPIC);
	pDC->SetViewportOrg(512,325);
	pDC->SetViewportExt(512,-325);
	pDC->SetWindowExt(512,325);
	 
   

	pDC->SelectObject(&pen2);

	/*绘制三角形*/
    pDC->MoveTo(p4[0][0],p4[0][1]);
	pDC->LineTo(p4[1][0],p4[1][1]);
	pDC->LineTo(p4[2][0],p4[2][1]);
    pDC->LineTo(p4[0][0],p4[0][1]);

	n4=0;
	}
	else if(flag5)//绘制长方体（同时画出坐标系）
	{
		GetMaxX();
	GetMaxY();
	CPen pen;
	pen.CreatePen(0,1,RGB(0,0,0));
	CPen *pOld=pDC->SelectObject(&pen);
	
	pDC->MoveTo(MaxX/2,MaxY/2);
	pDC->LineTo(MaxX,MaxY/2);

	pDC->MoveTo(MaxX/2,MaxY/2);
	pDC->LineTo(MaxX/2,0);

	pDC->MoveTo(MaxX/2,MaxY/2);
	pDC->LineTo(MaxX/2-MaxY/2,MaxY-1);

	pDC->SelectObject(pOld);
	pen.DeleteObject();

	}

}

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView printing

BOOL CLYTGraphicsView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CLYTGraphicsView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CLYTGraphicsView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CLYTGraphicsView message handlers

void CLYTGraphicsView::OnDrawBezier() 
{
	// TODO: Add your command handler code here
	flag=1;
	Invalidate();

	
}



void CLYTGraphicsView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(flag==1)
	{
	CClientDC dc(this);
	//flag=1;
    CPoint y[100];
	static n1;
	y[n1]=point;
	p[n]=y[n1];
	x0=xm=point;
	dc.MoveTo(y[n1-1]);
    dc.LineTo(y[n1]);
    n1++;n++;
	}
	else if(s)
	{
		start=point;
		if(!n) yl=point;
		n1++;
	    old=point;
	    flag1=1;
	}
	else if(flag3)//绘制b样条
	{
		p[m_PN++]=point;
	CClientDC dc(this);
	CPen red_pen(PS_SOLID,3,RGB(255,0,0));
	CPen *poldPen=dc.SelectObject(&red_pen);
	dc.Ellipse(point.x-1,point.y-1,point.x+1,point.y+1);//绘制控制点
	dc.SelectObject(poldPen);
	
	}
	else if(flag4==1)//控制二维图形及其变换
{
	switch(s4)
{
case 0:// 在视图区点三个点
	p4[n4][0]=point.x-512;
	p4[n4][1]=325-point.y;
	p4[n4][2]=1;
	n4++;
	if(n4>2)
	Invalidate();//通知ONDRAW函数绘制三角形
	break;
/*case 1://turn
	static int x[2][2];
	x[n][0]=point.x-512;
	x[n][1]=325-point.y;
	n++;
	if(n>1) 
	{
	InitialMatrix();
	t[2][0]=x[1][0]-x[0][0];
	t[2][1]=x[1][1]-x[0][1];
    MatrixMultiply(p4,t);
	Invalidate();
	}
	break;*/
case 3://绕鼠标左键按下的点旋转输入的角度
	InitialMatrix();
	/*先将鼠标左键按的点平移到原点处*/
    t[2][0]=-point.x+512;
	t[2][1]=-325+point.y;
	MatrixMultiply(p4,t);
	/*进行旋转变换*/
	if(dlg2.DoModal()==IDOK)
	{
		UpdateData(true);
        float a=dlg2.angle*3.142/180;
        InitialMatrix();
	    t[0][0]=t[1][1]=cos(a);
	    t[0][1]=sin(a);
	    t[1][0]=-sin(a);
	    MatrixMultiply(p4,t);
	}
	/*平移至原来的点*/
	 InitialMatrix();
     t[2][0]=point.x-512;
	 t[2][1]=325-point.y;
	 MatrixMultiply(p4,t);
     Invalidate();
	 break;

case 4://相对于任意点缩放（即鼠标左键按下的点）
	InitialMatrix();
	/*先将鼠标左键按的点平移到原点处*/
    t[2][0]=-point.x+512;
	t[2][1]=-325+point.y;
	MatrixMultiply(p4,t);
	/*进行缩放变换*/
	if(dlg1.DoModal()==IDOK)
	{
		UpdateData(true);
        InitialMatrix();
	    t[0][0]=dlg1.m1;
		t[1][1]=dlg1.m2;
	    MatrixMultiply(p4,t);
	}
	/*平移至原来的点*/
	 InitialMatrix();
     t[2][0]=point.x-512;
	 t[2][1]=325-point.y;
	 MatrixMultiply(p4,t);
     Invalidate();
	 break;

}

}
	CView::OnLButtonDown(nFlags, point);
}

void CLYTGraphicsView::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CClientDC dc(this);
if(flag)//控制绘制bezier曲线的控制线的
{
	dc.SetROP2(R2_NOT);
	dc.MoveTo(x0);
	dc.LineTo(xm);
	dc.MoveTo(x0);
	dc.LineTo(point);
	xm=point;
}
else if(flag1)//控制绘制基本图形的
{
	CClientDC dc(this);
	CBrush brush;
	brush.CreateStockObject(NULL_BRUSH);
	dc.SelectObject(&brush);
	dc.SetROP2(R2_NOT);
	switch(s)
	{
	case 1:
		dc.Ellipse(start.x,start.y,old.x,old.y);
		dc.Ellipse(start.x,start.y,point.x,point.y);
		old=point;
		break;
	case 2:
		dc.Rectangle(start.x,start.y,old.x,old.y);
		dc.Rectangle(start.x,start.y,point.x,point.y);
		old=point;
		break;
	case 3:
	case 4:
		dc.MoveTo(start.x,start.y);
		dc.LineTo(old.x,old.y);
		dc.MoveTo(start.x,start.y);
		dc.LineTo(point.x,point.y);
		old=point;
		break;
	}
}


	
	CView::OnMouseMove(nFlags, point);
}

void CLYTGraphicsView::OnRButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
if(flag==1)//控制绘制bezier
{	
	flag=0;
CPen pen1(0,3,255),pen2(0,3,0xff0000),pen3(0,3,0x00ff00);
CClientDC dc(this);
switch(k%3)
{
case 0:
dc.SelectObject(&pen1);
break;
case 1:
dc.SelectObject(&pen2);
break;
case 2:
dc.SelectObject(&pen3);
break;
}
k++;
dc.MoveTo(b(n-1,0,p));
for(int i=0;i<=30;i++)
  dc.LineTo(b(n-1,(float)i/30,p));
  h=n;
  n=0;
}
else if(flag1==1)//控制绘制基本图形的
{
	CClientDC dc(this);
dc.MoveTo(yl.x,yl.y);
dc.LineTo(point.x,point.y);	

flag1=0;
n1=0;	
}	
	CView::OnRButtonDown(nFlags, point);
}
float CLYTGraphicsView::c(int n, int i, float t)//画bezier曲线的基函数
{
	int j;
float a=1;
for(j=i+1;j<=n;j++)
a*=j;
for(j=1;j<=n-i;j++)
a/=j;
a*=(float)pow(t,i);
a*=(float)pow(1-t,n-i);
return a;

}

CPoint CLYTGraphicsView::b(int n, float t, CPoint p[])//计算bezier曲线上点坐标的函数
{
	int i;
CPoint q;
float x=0,y=0;
for(i=0;i<=n;i++)
{
	x=x+p[i].x*c(n,i,t);
	y=y+p[i].y*c(n,i,t);
}
q.x=(long)x;
q.y=(long)y;
return q;

}

void CLYTGraphicsView::OnResult() 
{
	// TODO: Add your command handler code here
	flag2=1;
Invalidate();	
	
}

void CLYTGraphicsView::OnClear()//清除bezier曲线 
{
	// TODO: Add your command handler code here
	n=0;
k=0;
flag=0;
flag2=0;
Invalidate();
}

void CLYTGraphicsView::OnLine() 
{
	// TODO: Add your command handler code here
	s=3;
}