我正在使用 Visual C++ 和 GLUT。我错过了这样一个正常的东西吗?这是我正在使用的确切代码。我试图插入 glNormal3f(0, 0, 1); 在顶点语句之前,但这并没有改变任何东西。glutSolidSphere 的渲染与我预期的一样,但不是四边形。
#include "stdafx.h"
#include <stdlib.h>
#include <GL/glut.h>
float spin = 0.0f;
float zDir = 0;
GLfloat diffuseIntensity[] = {.75, .75, .75, 1};
GLfloat specularHue[] = {0, 0, .5f, 1};
GLfloat shininess[] = {5};
void moveCamera();
void checkKeys(int, int, int);
void setUpLighting();
void changeSize(int w, int h) {
if (h == 0)
h = 1;
float ratio = w * 1.0 / h;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, w, h);
gluPerspective(45,ratio,1,1000);
glMatrixMode(GL_MODELVIEW);
}
void renderScene(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
moveCamera();
glTranslatef(0, 0, zDir-5);
glEnable(GL_COLOR_MATERIAL);
glShadeModel(GL_FLAT);
glMaterialfv(GL_FRONT, GL_SHININESS, shininess);
glMaterialfv(GL_FRONT, GL_SPECULAR, specularHue);
glPushMatrix();
glRotatef(90, 1, 0, 0);
glRotatef(spin, 0, 0, 1);
glutSolidSphere(.5f, 24, 24);
glPopMatrix();
spin += .01f;
if(spin > 360) spin -= 360;
glBegin(GL_QUADS);
glVertex3f(-10, 0, -10);
glVertex3f(-10, 0, 10);
glVertex3f(10, 0, 10);
glVertex3f(10, 0, -10);
glEnd();
glutSwapBuffers();
glutPostRedisplay();
}
int main(int argc, char **argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(800,600);
glutCreateWindow("Lighthouse3D - GLUT Tutorial");
glutDisplayFunc(renderScene);
glutReshapeFunc(changeSize);
glutSpecialFunc(checkKeys);
glEnable(GL_DEPTH_TEST);
setUpLighting();
glutMainLoop();
return 1;
}
void moveCamera(){
glTranslatef(0, 0, zDir);
}
void checkKeys(int key, int x, int y){
switch(key){
case GLUT_KEY_UP:
zDir += .1f;
glutPostRedisplay();
break;
case GLUT_KEY_DOWN:
zDir += -.1f;
glutPostRedisplay();
break;
case GLUT_KEY_END:
exit(0);
}
}
void setUpLighting(){
GLfloat position0[] = {3, 1, 0, 1};
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_POSITION, position0);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseIntensity);
}