opengl的测试程序出现的问题-优快云博客

本文链接：https://blog.youkuaiyun.com/anbangesc/article/details/6396613

本文档描述了在使用OpenGL编程时遇到的链接错误，具体为多个未解析的外部符号，如 auxMainLoop@4, auxReshapeFunc@4等。通过在源代码中添加#pragma comment(lib, "opengl32.lib"), #pragma comment(lib, "glaux.lib"), #pragma comment(lib, "glu32.lib")来解决这些问题，确保链接到所需的库。" 97632860,8729508,标记永久化技术在可持久化线段树的应用,"['数据结构', '算法', '线段树']

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#include "windows.h"
//#include <gl/gl.h>
#include <gl/glu.h>
#include <gl/glut.h>
//#include <gl/glaux.h>
#include<GL/gl.h>
#include<GL/glaux.h>
void myinit(void);
void DrawMyObjects(void);
void CALLBACK myReshape(GLsizei w,GLsizei h);
void CALLBACK display(void);

void myinit(void)
{
glClearColor(0.0,0.0,0.0,0.0);
glClear(GL_COLOR_BUFFER_BIT);
glShadeModel(GL_FLAT);
}

void CALLBACK myReshape(GLsizei w,GLsizei h)
{
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(w<=h)
glOrtho(-20.0,20.0,-20.0*(GLfloat)h/(GLfloat)w, 20.0*(GLfloat)h/(GLfloat)w,-50.0,50.0);
else
glOrtho(-20.0*(GLfloat)h/(GLfloat)w, 20.0*(GLfloat)h/(GLfloat)w,-20.0,20.0,-50.0,50.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}

void CALLBACK display(void)
{
glColor3f(1.0,1.0,0.0);
DrawMyObjects();
glFlush();
}

void DrawMyObjects(void)
{
/* draw some points */
glBegin(GL_POINTS);
glColor3f(1.0,0.0,0.0);
glVertex2f(-10.0,11.0);
glColor3f(1.0,1.0,0.0);
glVertex2f(-9.0,10.0);
glColor3f(0.0,1.0,1.0);
glVertex2f(-8.0,12.0);
glEnd();

/* draw some line_segments */
glBegin(GL_LINES);
glColor3f(1.0,1.0,0.0);
glVertex2f(-11.0,8.0);
glVertex2f(-7.0,7.0);
glColor3f(1.0,0.0,1.0);
glVertex2f(-11.0,9.0);
glVertex2f(-8.0,6.0);
glEnd();

/* draw one opened_line */
glBegin(GL_LINE_STRIP);
glColor3f(0.0,1.0,0.0);
glVertex2f(-3.0,9.0);
glVertex2f(2.0,6.0);
glVertex2f(3.0,8.0);
glVertex2f(-2.5,6.5);
glEnd();

/* draw one closed_line */
glBegin(GL_LINE_LOOP);
glColor3f(0.0,1.0,1.0);
glVertex2f(7.0,7.0);
glVertex2f(8.0,8.0);
glVertex2f(9.0,6.5);
glVertex2f(10.3,7.5);
glVertex2f(11.5,6.0);
glVertex2f(7.5,6.0);
glEnd();

/* draw one filled_polygon */
glBegin(GL_POLYGON);
glColor3f(0.5,0.3,0.7);
glVertex2f(-7.0,2.0);
glVertex2f(-8.0,3.0);
glVertex2f(-10.3,0.5);
glVertex2f(-7.5,-2.0);
glVertex2f(-6.0,-1.0);
glEnd();

/* draw some filled_quandrangles */
glBegin(GL_QUADS);
glColor3f(0.7,0.5,0.2);
glVertex2f(0.0,2.0);
glVertex2f(-1.0,3.0);
glVertex2f(-3.3,0.5);
glVertex2f(-0.5,-1.0);
glColor3f(0.5,0.7,0.2);
glVertex2f(3.0,2.0);
glVertex2f(2.0,3.0);
glVertex2f(0.0,0.5);
glVertex2f(2.5,-1.0);
glEnd();

/* draw some filled_strip_quandrangles */
glBegin(GL_QUAD_STRIP);
glVertex2f(6.0,-2.0);
glVertex2f(5.5,1.0);
glVertex2f(8.0,-1.0);
glColor3f(0.8,0.0,0.0);
glVertex2f(9.0,2.0);
glVertex2f(11.0,-2.0);
glColor3f(0.0,0.0,0.8);
glVertex2f(11.0,2.0);
glVertex2f(13.0,-1.0);
glColor3f(0.0,0.8,0.0);
glVertex2f(14.0,1.0);
glEnd();

/* draw some filled_triangles */
glBegin(GL_TRIANGLES);
glColor3f(0.2,0.5,0.7);
glVertex2f(-10.0,-5.0);
glVertex2f(-12.3,-7.5);
glVertex2f(-8.5,-6.0);
glColor3f(0.2,0.7,0.5);
glVertex2f(-8.0,-7.0);
glVertex2f(-7.0,-4.5);
glVertex2f(-5.5,-9.0);
glEnd();

/* draw some filled_strip_triangles */
glBegin(GL_TRIANGLE_STRIP);
glVertex2f(-1.0,-8.0);
glVertex2f(-2.5,-5.0);
glColor3f(0.8,0.8,0.0);
glVertex2f(1.0,-7.0);
glColor3f(0.0,0.8,0.8);
glVertex2f(2.0,-4.0);
glColor3f(0.8,0.0,0.8);
glVertex2f(4.0,-6.0);
glEnd();

// draw some filled_fan_triangles */
glBegin(GL_TRIANGLE_FAN);
glVertex2f(8.0,-6.0);
glVertex2f(10.0,-3.0);
glColor3f(0.8,0.2,0.5);
glVertex2f(12.5,-4.5);
glColor3f(0.2,0.5,0.8);
glVertex2f(13.0,-7.5);
glColor3f(0.8,0.5,0.2);
glVertex2f(10.5,-9.0);
glEnd();
}

void main(void)
{
auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);
auxInitPosition(0,0,500,500);
auxInitWindow("Geometric Primitive Types");
myinit();
auxReshapeFunc(myReshape);
auxMainLoop(display);
}

编译出现如下错误：

Linking...
first.obj : error LNK2001: unresolved external symbol _auxMainLoop@4
first.obj : error LNK2001: unresolved external symbol _auxReshapeFunc@4
first.obj : error LNK2001: unresolved external symbol _auxInitWindowA@4
first.obj : error LNK2001: unresolved external symbol _auxInitPosition@16
first.obj : error LNK2001: unresolved external symbol _auxInitDisplayMode@4
Debug/firstopengl.exe : fatal error LNK1120: 5 unresolved externals
Error executing link.exe.

firstopengl.exe - 6 error(s), 0 warning(s)

解决方法：在头文件中加入

#pragma comment( lib, "opengl32.lib")

#pragma comment( lib, "glaux.lib")
#pragma comment( lib, "glu32.lib")