#include "stdafx.h" //#include <gl/glut.h> //#include <iostream> #include <cmath> #include <Windows.h> using namespace std; inline int round(float val) {return int(val+0.5);} //inline void SetPixel(int x,int y){glBegin(GL_POINTS);glVertex2i(x,y);glEnd();} void lineDDA(int x0,int xEnd,int y0,int yEnd); int _tmain(int argc, _TCHAR* argv[]) { lineDDA(100,400,200,400);//控制台窗口的左上角为(0,0) lineDDA(100,400,100,400); system("pause"); return 0; } void lineDDA(int x0,int xEnd,int y0,int yEnd) { HWND hWnd=GetConsoleWindow(); //获得控制台窗口的句柄 HDC hDC=GetWindowDC(hWnd);//通过窗口句柄得到该窗口的设备场境句柄 int dx,dy,steps,k; float xIncrease,yIncrease,x=x0,y=y0; dx=xEnd-x0; dy=yEnd-y0; if (fabs((float)dx)>fabs((float)dy)) steps=dx; else steps=dy; xIncrease=(float)dx/(float)steps; yIncrease=(float)dy/(float)steps; SetPixel(hDC,round(x),round(y),RGB(255,0,0)); for (k=0;k<steps;++k) { x+=xIncrease; y+=yIncrease; SetPixel(hDC,round(x),round(y),RGB(255,0,0)); } }
#include "stdafx.h" #include<windows.h> int main( void ) { HWND hWnd=GetConsoleWindow(); // 获取一个可供画图的DC,我这里就直接用桌面算了 //HDC hdc = GetWindowDC( GetDesktopWindow() ); HDC hdc=GetWindowDC(hWnd); // 创建红色、1像素宽度的实线画笔 HPEN hpen1 = CreatePen( PS_SOLID, 1, RGB(255,0,0) ); // 创建绿色、5像素宽度的破折画笔,如果你想创建其他种类的画笔请参阅MSDN HPEN hpen2 = CreatePen( PS_DASH, 5, RGB(0,255,0) ); // 创建一个实体蓝色画刷 HBRUSH hbrush1 = CreateSolidBrush( RGB(0,0,255) ); // 创造一个透明的画刷,如果你想创建其他种类的画刷请参阅MSDN HBRUSH hbrush2 = (HBRUSH)GetStockObject( NULL_BRUSH ); // 将hpen1和hbrush1选进HDC,并保存HDC原来的画笔和画刷 HPEN hpen_old = (HPEN)SelectObject( hdc, hpen1 ); HBRUSH hbrush_old = (HBRUSH)SelectObject( hdc, hbrush1 ); // 在(40,30)处画一个宽200像素,高50像素的矩形 Rectangle( hdc, 40, 30, 40+200, 30+50 ); // 换hpen1和hbrush1,然后在(40,100)处也画一个矩形,看看有何差别 SelectObject( hdc, hpen2 ); SelectObject( hdc, hbrush2 ); Rectangle( hdc, 40, 100, 40+200, 100+50 ); // 画个椭圆看看 Ellipse( hdc, 40, 200, 40+200, 200+50 ); // 画个(0,600)到(800,0)的直线看看 MoveToEx( hdc, 0, 600, NULL ); LineTo( hdc, 800, 0 ); // 在(700,500)处画个黄点,不过这个点只有一像素大小,你细细的看才能找到 SetPixel( hdc, 700, 500, RGB(255,255,0) ); // 恢复原来的画笔和画刷 SelectObject( hdc, hpen_old ); SelectObject( hdc, hbrush_old ); return 0; }