爲什麼我的glutWireSphere沒有填充顏色？

Question

我正在試圖製作一個基本的動畫，在窗口上有一個'飛艇'浮動。我曾嘗試調整不同的教程和源代碼，以幫助構建我的代碼，以便在批評中輕鬆完成。我還在搞清楚。我的主要問題是爲什麼我的glutWireSphere不填充指定的顏色？只是輪廓可見。讓我知道任何建議。代碼如下。

#include <stdlib.h> // need to include for non keywords like NULL 
#include <GLUT/GLUT.h> // open gl wrapper class 

GLfloat speedX = 0.01; // blimp's speed in x & y position 
GLfloat speedY = 0.001; 
GLfloat blimpX = 0.0; // blimp's (x,y) position 
GLfloat blimpY = 0.0; 
GLfloat blimpXMax, blimpXMin, blimpYMax, blimpYMin; // blimp's bounds 

class Blimp { 

    public: 
    void draw(void); 
}; 

void Blimp::draw(void) 
{ 
    glPushMatrix(); 
     glColor3f(1.0,1.0,0.0); 
     glutWireSphere(8, 25.0, 25.0); 
     glPushMatrix(); 
     glTranslatef(-8, 0,0); 
     glutWireSphere(6, 25, 25); 
     glPopMatrix(); 
    glPopMatrix(); 
} 


void display() 
{ 

    glMatrixMode(GL_MODELVIEW); 
    glClear(GL_COLOR_BUFFER_BIT); 
    glPushMatrix(); // save modelview matrix 
    Blimp blimp; 
    glTranslatef(blimpX, blimpY, 0.0); // move blimp 
    blimp.draw(); 
    glPopMatrix(); // restore modelview matrix 
    glutSwapBuffers(); 

    // compute location for next refresh 
    blimpX += speedX; 
    blimpY += speedY; 

    //check if blimp exceeds edges: return on other side 
    if (blimpX > blimpXMax + 14) { 
     blimpX = blimpXMin - 14; 
    } else if (blimpX < blimpXMin - 14) { 
     blimpX = blimpXMax + 14; 
    } 
    /* 
    // check if blimp exceeds edges: bounce back other direction 
    if (blimpX > blimpXMax) { 
     blimpX = blimpXMax; 
     speedX = -speedX; 
    } else if (blimpX < blimpXMin) { 
     blimpX = blimpXMin; 
     speedX = -speedX; 
    } 
    */ 

    if (blimpY > blimpYMax) { 
     blimpY = blimpYMax; 
     speedY = -speedY; 
    } else if (blimpY < blimpYMin){ 
     blimpY = blimpYMin; 
     speedY = -speedY; 
    } 


} 


void reshape(int w, int h) 
{ 
    glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
    glMatrixMode(GL_PROJECTION); 
    glLoadIdentity(); 
    glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0); 
    blimpXMin = -50.0 + 14; 
    blimpXMax = 50 - 8; 
    blimpYMin = 25; 
    blimpYMax = 50 - 8; 

} 

int main(int argc, char** argv) 
{ 

    glutInit(&argc, argv); 
    glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE); 
    glutInitWindowSize (500, 500); 
    glutInitWindowPosition (100, 100); 
    glutCreateWindow (argv[0]); 
    glutDisplayFunc(display); 
    glutReshapeFunc(reshape); 
    glutIdleFunc(display); 
    glutMainLoop(); 
    return(0); 
} 

Answer 1

glutWireSphere繪製線框球。你想要glutSolidSphere。

參見：http://www.opengl.org/documentation/specs/glut/spec3/node81.html