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实现了16种roundBox，见图

#include <cstdlib>   
#include <GL/glut.h>   
#include <cmath>   
#include <ctime>   
  
//#include "BezierLinkRender.h"   
#include "RoundBoxRender.h"   
  
//////////////////////////////////////////////////   
//global   
GLuint gColorStable[] =    
{   
    (0xFF0000), //red    
    (0xDC143C), //crimson   
    (0x9400D3), //violet   
    (0xFFA000), //orange   
    (0xFFFF00), //yellow   
    (0xFFD700), //glod   
    (0x00FF00), //green   
    (0x90FF90), //lightgreen   
    (0x006400), //darkgreen   
    (0x556B2F), //olivegreen        //very good color绿橄榄   
    (0x0000FF), //blue   
    (0x00008B), //darkblue   
    (0x4169E1), //royalblue   
    (0x5555FF), //skyblue   
    (0x191970), //midnightbue   
    (0xFF00FF), //fuchsia   
    (0x00FFFF), //aqua   
    (0xffb6c1), //pink   
    (0xFF91A4), //salmonpink   
    (0x30D5C8), //turquoise   
    (0x008080), //darkturpuoise   
    (0xA9A9A9), //gray   
    (0xD3D3D3), //lightgray   
    (0x808080)  //darkgray   
};   
  
float g_fWidth = 500;   
float g_fHeight = 500;   
float g_fDepth = 100;   
float g_fAngle = .0;   
  
int     gRoundboxtype = 0;   
//////////////////////////////////////////////////////////////////////////   
void renderBitmapString2D(float x, float y, void *font, char *string);   
void getColorFromTable(GLuint rgb, float vec[3]);   
  
void init(void)    
{   
    RoundBoxRender::setType(gRoundboxtype);   
    printf("%d\n", gRoundboxtype);   
  
    glClearColor (0.9, 0.9, 0.9, 0.0);   
    glShadeModel (GL_SMOOTH);   
}   
  
void display(void)   
{   
    const float slotSize = 30.f;   
    const float slotColor[] = {0.8f, 0.8f, 0.8f};   
    const float slotShadowSize = 2.0f;   
    const float slotShadowAlpha = 0.7;   
  
    glClear (GL_COLOR_BUFFER_BIT);   
    glColor3f (1.0, 1.0, 1.0);   
  
    glMatrixMode(GL_PROJECTION);   
    glLoadIdentity();   
    glOrtho(0, g_fWidth, 0, g_fHeight, 0, g_fDepth);   
    glMatrixMode(GL_MODELVIEW);   
    glLoadIdentity();   
  
    glTranslatef(80.f, 80.f, 0.f);      //整体平移   
       
    int xPos(0);   
    int yPos(0);   
    int xOffset(0);   
    int yOffset(0);   
  
    for (int i=0; i<16; i++)   
    {   
        char buffer[10] = {'\0'};   
        itoa (i,buffer,10);   
  
        int fontWidOffset = i>10 ? 12 : 5;       //估算量   
        int fontHghOffset = 10;                 //估算量   
  
        int boxSize = 60;   
           
        float colorVec[3];   
        getColorFromTable(gColorStable[i], colorVec);   
        glColor3fv(colorVec);   
        RoundBoxRender::setType(i);   
  
        yOffset = i/4;   
        xOffset = i%4;   
  
        glPushMatrix();   
        {   
            glTranslatef(xPos+xOffset*100, yPos+yOffset*100, 0.f);   
            RoundBoxRender::gl_round_box_shade(GL_POLYGON, 0, 0, boxSize, boxSize, 10, 0.3, 0);   
            glColor3f(0.f, 0.f, 0.0f);   
            renderBitmapString2D(boxSize/2-fontWidOffset, boxSize/2-fontHghOffset, GLUT_BITMAP_TIMES_ROMAN_24, buffer);   
        }glPopMatrix();   
    }   
    //glColor3f(1.0f, 1.0f, 0.0f);   
    //ui_draw_link_bezier(&gRect);   
  
    glutSwapBuffers();   
}   
  
void reshape (int w, int h)   
{   
    glViewport (0, 0, (GLsizei) w, (GLsizei) h);    
    glMatrixMode (GL_PROJECTION);   
    glLoadIdentity ();   
    gluPerspective(60,1.0,1.5,20);   
    glMatrixMode (GL_MODELVIEW);   
}   
  
void keyboard(unsigned char key, int x, int y)   
{   
    switch (key)    
    {   
    case 27:   
        exit(0);   
        break;   
    }   
    glutPostRedisplay();   
}   
  
void mouse(int button, int state, int x, int y)   
{   
    if(button==GLUT_LEFT_BUTTON)