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What does this mean?
opengl2 error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup
here is the code:
/*
This file was produced by 3D Exploration Plugin: CPP Export filter.
3D Exploration
Copyright (c) 1999-2000 X Dimension Software
WWW http://www.xdsoft.com/explorer/
eMail info@xdsoft.com
*/
#include <windows.h>
#include <gl.h>
#include <glu.h>
struct sample_MATERIAL{
GLfloat ambient[3];
GLfloat diffuse[3];
GLfloat specular[3];
GLfloat emission[3];
GLfloat alpha;
GLfloat phExp;
int texture;
};
static sample_MATERIAL materials [1] = {
{{0.117647f,0.117647f,0.117647f}, {0.752941f,0.752941f,0.752941f}, {0.752941f,0.752941f,0.752941f}, {0.0f,0.0f,0.0f}, 1.0f,8.0f,-1} //Explorer Default
};
// 8 Verticies
// 8 Texture Coordinates
// 8 Normals
// 12 Triangles
static BYTE face_indicies[12][9] = {
// Box01
{2,3,0 ,0,1,2 ,0,1,2 }, {1,0,3 ,3,2,1 ,3,2,1 }, {5,7,4 ,4,5,6 ,4,5,6 },
{6,4,7 ,7,6,5 ,7,6,5 }, {1,5,0 ,3,4,2 ,3,4,2 }, {4,0,5 ,6,2,4 ,6,2,4 },
{3,7,1 ,1,5,3 ,1,5,3 }, {5,1,7 ,4,3,5 ,4,3,5 }, {2,6,3 ,0,7,1 ,0,7,1 },
{7,3,6 ,5,1,7 ,5,1,7 }, {0,4,2 ,2,6,0 ,2,6,0 }, {6,2,4 ,7,0,6 ,7,0,6 }
};
static GLfloat vertices [8][3] = {
{-0.175528f,-0.5f,-0.263674f},{0.175528f,-0.5f,-0.263674f},{-0.175528f,0.5f,-0.263674f},
{0.175528f,0.5f,-0.263674f},{-0.175528f,-0.5f,0.263674f},{0.175528f,-0.5f,0.263674f},
{-0.175528f,0.5f,0.263674f},{0.175528f,0.5f,0.263674f}
};
static GLfloat normals [8][3] = {
{-0.816497f,0.408248f,-0.408248f},{0.333333f,0.666667f,-0.666667f},{-0.333333f,-0.666667f,-0.666667f},
{0.816497f,-0.408248f,-0.408248f},{0.408248f,-0.816497f,0.408248f},{0.666667f,0.333333f,0.666667f},
{-0.666667f,-0.333333f,0.666667f},{-0.408248f,0.816497f,0.408248f}
};
static GLfloat textures [8][2] = {
{0.303775f,0.5f},{0.196225f,0.5f},{0.696225f,0.5f},
{0.803775f,0.5f},{0.803775f,0.102329f},{0.196225f,0.102329f},
{0.696225f,0.102329f},{0.303775f,0.102329f}
};
/*Material indicies*/
/*{material index,face count}*/
static int material_ref [1][2] = {
{0,12}
};
void MyMaterial(GLenum mode,GLfloat *f,GLfloat alpha)
{
GLfloat d[4];
d[0]=f[0];
d[1]=f[1];
d[2]=f[2];
d[3]=alpha;
glMaterialfv (GL_FRONT_AND_BACK,mode,d);
}
/*
* SelectMaterial uses OpenGL commands to define facet colors.
*
* Returns:
* Nothing
*/
void SelectMaterial(int i)
{
//
// Define the reflective properties of the 3D Object faces.
//
glEnd();
GLfloat alpha=materials.alpha;
MyMaterial (GL_AMBIENT, materials.ambient,alpha);
MyMaterial (GL_DIFFUSE, materials.diffuse,alpha);
MyMaterial (GL_SPECULAR, materials.specular,alpha);
MyMaterial (GL_EMISSION, materials.emission,alpha);
glMaterialf (GL_FRONT_AND_BACK,GL_SHININESS,materials.phExp);
glBegin(GL_TRIANGLES);
};
GLint Gen3DObjectList()
{
int i;
int j;
GLint lid=glGenLists(1);
int mcount=0;
int mindex=0;
glNewList(lid, GL_COMPILE);
glBegin (GL_TRIANGLES);
for(i=0;i<sizeof(face_indicies)/sizeof(face_indicies[0]);i++)
{
if(!mcount)
{
SelectMaterial(material_ref[mindex][0]);
mcount=material_ref[mindex][1];
mindex++;
}
mcount–;
for(j=0;j<3;j++)
{
int vi=face_indicies[j];
int ni=face_indicies[j+3];//Normal index
int ti=face_indicies[j+6];//Texture index
glNormal3f (normals[ni][0],normals[ni][1],normals[ni][2]);
glTexCoord2f(textures[ti][0],textures[ti][1]);
glVertex3f (vertices[vi][0],vertices[vi][1],vertices[vi][2]);
}
}
glEnd ();
glEndList();
return lid;
};
</i>
It means there''s no main function defined which you need for your program to compile and run properly.
quote:Original post by CoMpFreaK
What does this mean?
opengl2 error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup
Are you using Visual C++? What project type?
If you select an empty project for Win32 Application Project Type and do not define a WinMain, you will get this error.
its a win 32 apllication,
i can put a:
void main()
{}
at the beggining and it compiles correctly.
problem is when i run it it shows a blank screen.
i can put a:
void main()
{}
at the beggining and it compiles correctly.
problem is when i run it it shows a blank screen.
Your main function needs to call the initializations, and then runs a loop that draws everything.
This topic is closed to new replies.
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