VC++绘制铁路道岔-白红宇

VC++绘制铁路道岔

阅读量：108 次

发布时间：2019-02-26

本文共 2760 字，大约阅读时间需要 9 分钟。


   
   
   
绘制代码；
   
void CDaocaView::OnDraw(CDC* pDC){    CDaocaDoc* pDoc = GetDocument();    ASSERT_VALID(pDoc);    // 画法待完成    COLORREF DaoChaColor= RGB(0,0,0);    int width = m_rect.Width() ;    int height = m_rect.Height() ;    CPen newpen(PS_SOLID,60,DaoChaColor);    CPen newpen1(PS_SOLID,60,RGB(0,255,255));    CPen *pOldPen = pDC->SelectObject(&newpen);    pDC->MoveTo(m_rect.left,(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width*0.33),(int)(m_rect.top + height*0.5));    pDC->MoveTo((int)(m_rect.left +width*0.33),(int)(m_rect.top+height*0.5));    pDC->LineTo((int)(m_rect.left +width*0.5),(int)(m_rect.top+(height*0.5+width*(sqrt(3))/6)));    pDC->MoveTo((int)(m_rect.left +width*0.67),(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width),m_rect.top+height*0.5);    m_rect.left=240;    m_rect.right=440;    pDC->MoveTo(m_rect.left,(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width/3),(int)(m_rect.top + height*0.5));    pOldPen = pDC->SelectObject(&newpen1);    pDC->MoveTo((int)(m_rect.left +width/3),(int)(m_rect.top+height*0.5));    pDC->LineTo((int)(m_rect.left +width*2/3),(int)(m_rect.top+height*0.5));    pOldPen = pDC->SelectObject(&newpen);    pDC->MoveTo((int)(m_rect.left +width*2/3),(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width),m_rect.top+height*0.5);    m_rect.left=470;    m_rect.right=670;    pDC->MoveTo(m_rect.left,(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width/3),(int)(m_rect.top + height*0.5));    pDC->MoveTo((int)(m_rect.left +width/3),(int)(m_rect.top+height*0.5));    pDC->LineTo((int)(m_rect.left +width*0.5),(int)(m_rect.top+(height*0.5 - width*(sqrt(3))/6)));    pDC->MoveTo((int)(m_rect.left +width*2/3),(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width),m_rect.top+height*0.5);    m_rect.left=700;    m_rect.right=900;    pDC->MoveTo(m_rect.left,(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width/3),(int)(m_rect.top + height*0.5));    pDC->MoveTo((int)(m_rect.left +width/3),(int)(m_rect.top+height*0.5));    pDC->LineTo((int)(m_rect.left +width/2),(int)(m_rect.top+(height*0.5 + width*(sqrt(3))/6)));    pDC->MoveTo((int)(m_rect.left +width*2/3),(int)(m_rect.top + height*0.5));    pDC->LineTo((int)(m_rect.left +width),m_rect.top+height*0.5);    pDC->SetBkMode(TRANSPARENT);    pDC->SelectObject(pOldPen);}
   
头文件添加一个成员变量：CRect m_rect;
   
初始化；
   
CDaocaView::CDaocaView(){    // 初始化成员变量    m_rect.left=10;    m_rect.top=10;    m_rect.right=210;    m_rect.bottom=210;}
   
包含<math.h>；
   
绘制效果如下；
   
代码采用了几何计算方法绘制图形，主要包括菱形和直线的绘制。通过调整坐标点的位置，画出了具有特定角度的交叉图形。图形绘制采用了透明笔触模式，并通过改变颜色进行区分。绘制完成后，重设了窗口的位置和大小。
   
关于道岔的问题，这里指的是铁路交叉处的道岔结构。通过代码实现的绘制效果，展示了道岔的基本构造方式及其在不同位置的几何特性。