基于opengl编写简单的二维绘图软件

一、开发环境说明

• 操作系统：windows
• 开发软件：Visual Studio 2017
• 编程语言：基于控制台下的opengl
• 用到的库： glut

opengl环境配置可参照上一篇博客：控制台+OPENGL配置说明[GLUT篇]

二、内容说明

1、 功能介绍

• 可以绘图直线、三角形、四边形、圆形、椭圆、平行四边形、六边形
• 可以选择绘制颜色
• 可以选择线条粗细
• 绘制的图形能导出文件，也能加载文件；
• 可以清空画布

2、操作说明

• 鼠标左键按下：绘制图形
• 鼠标右键点击：弹出菜单选择功能

3、程序目录截图

4、程序部分代码展示

void itDisplay()
{
	glClear(GL_COLOR_BUFFER_BIT);            //清屏
	
	for(int i=0; i<=count1-1; i=i+2){//绘制线
  	 drawThread(point1[i].x,point1[i].y,point1[i+1].x,point1[i+1].y,point1[i].cx,point1[i].cy,point1[i].cz, point1[i].pointsize, point1[i].model);
	}
	for(int i=0; i+2<=count2; i=i+3)
	{//绘制三角形
	  drawTriangle(point2[i].x,point2[i].y,point2[i+1].x,point2[i+1].y,point2[i+2].x,point2[i+2].y,point2[i].cx,point2[i].cy,point2[i].cz, point2[i].pointsize, point2[i].model);
	}
	if((count2+1)%3==2)
	{
      drawThread(point2[count2-1].x,point2[count2-1].y,point2[count2].x,point2[count2].y,point2[count2-1].cx,point2[count2-1].cy,point2[count2-1].cz, point2[count2 - 1].pointsize, point2[count2 - 1].model);
	}
	for(int i=0; i<=count3-1; i=i+2)
	{//绘制四编写
       drawRectangle(point3[i].x,point3[i].y,point3[i+1].x,point3[i+1].y,point3[i].cx,point3[i].cy,point3[i].cz, point3[i].pointsize, point3[i].model);
	}
	for(int i=0; i<=count4-1; i=i+2)
	{//绘制圆
       drawCircle(point4[i].x,point4[i].y,point4[i+1].x,point4[i+1].y,point4[i].cx,point4[i].cy,point4[i].cz, point4[i].pointsize, point4[i].model);
	}
	for (int i = 0; i <= count5 - 1; i = i + 2)
	{//绘制平行四边形
		drawRectangleParral(point5[i].x, point5[i].y, point5[i + 1].x, point5[i + 1].y, point5[i].cx, point5[i].cy, point5[i].cz, point5[i].pointsize, point5[i].model);
	}
	for (int i = 0; i <= count6 - 1; i = i + 2)
	{//绘制6边形
		DrawSixBianXing(point6[i].x, point6[i].y, point6[i + 1].x, point6[i + 1].y, point6[i].cx, point6[i].cy, point6[i].cz, point6[i].pointsize, point6[i].model);
	}
	for (int i = 0; i <= count7 - 1; i = i + 2)
	{
		DrawSiBianxing(point7[i].x, point7[i].y, point7[i + 1].x, point7[i + 1].y, point7[i].cx, point7[i].cy, point7[i].cz, point7[i].pointsize, point7[i].model);
	}
	glFlush();       //送所有输出到显示设备
	//glutPostRedisplay();
}

5、 运行效果展示

三、测试用例及代码下载

• 测试文件下载：双击exe文件可以直接运行
• 整个工程代码下载