OpenGL 画出雷达动态扫描效果(二) 非底图

OpenGL 画出雷达动态扫描效果(一)中给出了已一张图片作为底图的雷达扫面程序

如果有漂亮的雷达底图的话，效果应该非常不错的，另外也可以直接手绘雷达框架

效果如下

雷达主体代码

    glLineWidth(2.0);

    glColor4f(0.0f, 1.0f, 0.0f,1.0f);

    DrawCircle();

    DrawCircle(0.4);

    glBegin(GL_LINES);

    glVertex2f(-,),glVertex2f(,);

    glVertex2f(,-),glVertex2f(,);

    glVertex2f(-0.7,-0.1),glVertex2f(-0.7,0.1);

    glVertex2f(0.7,-0.1),glVertex2f(0.7,0.1);

    glVertex2f(-0.1,-0.7),glVertex2f(0.1,-0.7);

    glVertex2f(-0.1,0.7),glVertex2f(0.1,0.7);

    glEnd();

画圆代码

    glEnable(GL_LINE_SMOOTH);

    glHint(GL_LINE_SMOOTH_HINT,GL_NICEST);

    glBegin(GL_LINE_LOOP);

    for(int i=;i<;++i)

        glVertex2f(r*cos(*Pi/*i),r*sin(*Pi/*i));

    glEnd();

扫描线代码

    float pos_x=;

    float pos_y=;

    glBegin(GL_TRIANGLE_FAN);

    glColor4f(0.0f, 0.0f, 0.0f,0.1f);

    glVertex2f(0.0f, 0.0f);

    for(int i=;i<ScanWidth;++i)

    {

        pos_x=cos((i/180.0)*Pi+ScanTheta);

        pos_y=sin((i/180.0)*Pi+ScanTheta);

        glColor4f(0.0f, (i+0.01)/ScanWidth, 0.0f,1.0f);

        glVertex2f(pos_x, pos_y);

    }

    glEnd();

Demo下载地址: http://files.cnblogs.com/files/xd-jinjian/file.rar