OpenGL绘制长方体线框

实现代码如下：

#include <GL/glut.h> void ChangeSize(int w, int h){glViewport(0,0,(GLsizei)w,(GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();glFrustum(-1.0,1.0,-1.0,1.0,1.5,20.0);glMatrixMode(GL_MODELVIEW);}void RenderScene(void){glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0f,1.0f,1.0f);glLoadIdentity();gluLookAt(0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0);glScalef(1.0f,2.0f,1.0f);glutWireCube(1.0);glutSwapBuffers();}int main(int argc, char* argv[]){glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);glutInitWindowSize(800, 600);glutCreateWindow("3D Effects Demo");glutReshapeFunc(ChangeSize);//glutKeyboardFunc(KeyPressFunc);glutDisplayFunc(RenderScene);//SetupRC();glutMainLoop();//glDeleteTextures(4,textures);return 0;}