用OpenGL画一个字母β

Question

请大佬能不能教我下如何用openGL画一个字母β，就和图中的输出一样，最好能有c++的代码，如果可以的话，请加上注释

谢谢

Answer 1

#include<windows.h>

 

#ifdef __APPLE__

#include <GLUT/glut.h>

#else

#include <GL/glut.h>

#endif

 

#include <stdlib.h>

 

void init (void)

{

    glClearColor (1.0, 1.0, 1.0, 0.0);  // 设置显示颜色为白色.

    glMatrixMode (GL_PROJECTION);       // 设置投影参数

    gluOrtho2D (0.0, 200.0, 0.0, 150.0);

}

void CharMap(void)

{

    glClear (GL_COLOR_BUFFER_BIT);  // 清空显示屏幕

   // glColor3f (0.0, 0.0, 0.0);      // 设置颜色为红色

       glColor3f(0.0,0.0,0.0);

       char text = 'β';

       glRasterPos2i(20,40);

           glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,text )//输出字符

 

       glScalef(0.1,0.1,0.0);

       glRotatef(300,20.0,20.0,0.0);

       glRasterPos2i(20,40);

           glutStrokeCharacter(GLUT_STROKE_ROMAN,text );//显示

       }

       glFlush();

}

int main (int argc, char** argv)

{

    glutInit (&argc, argv);                         // Initialize GLUT.

    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);   // Set display mode.

    glutInitWindowPosition (50, 100);   // Set top-left display-window position.

    glutInitWindowSize (1000, 600);      // Set display-window width and height.

    glutCreateWindow ("An Example OpenGL Program"); // Create display window.

    init ( );                            // Execute initialization procedure.

    glutDisplayFunc (CharMap);       // Send graphics to display window.

    glutMainLoop ( );

    return 0;                 // Display everything and wait.

}