Question

计算机图形学/OpenGL/c++高手指点。我在vc++平台的win32控制台上编写如下代码，出现问题

#include "stdafx.h"
#include "gl\glut.h"

void display();
void Initialize();

int main(int argc, char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize(250,250);
glutInitWindowPosition(100,100);
glutCreateWindow("hello");
Initialize();
glutDisplayFunc(display);
glutMainLoop();

return 0;
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,1.0,1.0);
glBegin(GL_POLYGON);
glVertex3f(0.25,0.25,0.0);
glVertex3f(0.75,0.25,0.0);
glVertex3f(0.75,0.75,0.0);
glVertex3f(0.25,0.75,0.0);
glEnd();
glFlush();
}

void Initialize(){
glClearColor(0.0,0.0,0.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0,1.0,0.0,1.0,-1.0,1.0);

}
错误：
Linking...
pp.obj : error LNK2001: unresolved external symbol _glutMainLoop@0
pp.obj : error LNK2001: unresolved external symbol _glutDisplayFunc@4
pp.obj : error LNK2001: unresolved external symbol _glutCreateWindow@4
pp.obj : error LNK2001: unresolved external symbol _glutInitWindowPosition@8
pp.obj : error LNK2001: unresolved external symbol _glutInitWindowSize@8
pp.obj : error LNK2001: unresolved external symbol _glutInitDisplayMode@4
pp.obj : error LNK2001: unresolved external symbol _glutInit@8
Debug/pp.exe : fatal error LNK1120: 7 unresolved externals
执行 link.exe 时出错.

pp.exe - 1 error(s), 0 warning(s)

Answer 1

没有加入gl的lib库

Properties->Configuration Properties->Linker-Input->Additional Dependencies
加入你的lib库

或者在程序前面加上
#pragma comment(lib, “glut32.lib”);

追问

请教个问题，我初学，在vc6.0单文档里写的，可是出现不了背景，是怎么回事，那些视点投影视口都设置了，我就想初始化一下背景，怎么就出不来呢？
glClearColor(1.0,0.0,0.0,0.0);
glViewport(0.0,0.0,200,200);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0.0,0.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0,1.0,0.0,1.0,-1.0,1.0);

追答

你上网找个例子比较下吧。。具体是什么情况得具体分析。。