How do I compile a .c file that uses glm.h? ["undefined references"]

rehcarlos — Fri, 17 May 2013 23:25:12 GMT

Hello guys,

I'm writing a simple code (using gedit on Ubuntu) in C to import a 3d model (.obj).

In my code I'm using the library "glm.h" and I'm using the following commands:

GLMmodel* f16;
f16 = (GLMmodel*)malloc(sizeof(GLMmodel));
f16 = glmReadOBJ("./objs/f16.obj");

in order to compile, I'm using the following line:
gcc -Wall test.c -o test -lglut

but terminal prints the following errors:

"undefined reference to glmDraw
undefined reference to glmReadObj"

What can I do to compile my code correctly?

GlewInit

OliverMD — Tue, 07 May 2013 18:46:55 GMT

I've now got around to creating a simplistic rendering system with OpenGL, however while testing I'm encountering an access violation exception which occurs when I try to call glGenBuffers(1, &m_ElementBuffer);.

My Renderer::Init function has this in it:

Code :

if(!glfwInit())
	{
		fprintf(stderr, "GLFW failed to init, CRITICAL ERROR!\n");
		return false;//Have to back out due to severity of error
	}
	glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4);
	glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3);
	glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 3);
	glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
	if(!glfwOpenWindow(int(m_Dimensions.x), int(m_Dimensions.y), 0,0,0,0, 32,0,GLFW_WINDOW))
	{
		fprintf(stderr, "GLFW Open Window failed, aborting...\n");
		glfwTerminate();
		return false;
	}
 
	glewExperimental = true;
 
	if(glewInit() != GLEW_OK)
	{
		fprintf(stderr, "Glew failed to init \n");
		return false;
	}
	glClearColor(0.0f,0.0f,0.4f,0.0f);
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LESS);
	glfwSetWindowTitle("Render");

I then go on to parse an xml file to further initialization.

The problem I'm getting is when I call a sceneNodes init function which then calls its renderObjects init function which creates the buffers and all OpenGL related 'stuff' for that object. I am fairly sure that I am calling this after glewInit and have double checked numerous times although I will check it when I come back to this after a break away from the computer. I figure that something has gone wrong with glewinit since in my watch list, when I debug, it says that glGenBuffers is undefined however it also says this about glClear() which executes fine.

I'm sure it's something obvious that I may pick up straight away when I come back to it, but for the moment I am stumped and would appreciate any suggestions.

Realized some extra information might be needed, I using an AMD Radeon HD7850 Core Edition for XFX, I have used this function successfully in another project without any issues and glGetString(GL_VERSION) returns "3.3.12002 Core Profile Context 9.12.0.0"

Help GLM, GLEW and GLWF!

Taurus — Sun, 05 May 2013 22:01:57 GMT

Hello, since I'm trying to study the openlgl 3.3'm going crazy in both Linux and Windows.
I have tried various IDE (Code Blocks, Dev-Cpp, Eclipse, etc ...) but they never work the tutorials that follow.
I'm having trouble with GLM, GLEW and GLWF, as it must at least set Code Blocks on Linux and Windows to follow the tutorial? :doh:

OpenGL Discussion and Help Forums - OpenGL Toolkits (e.g. GLUT, GLFW, GLM)

How do I compile a .c file that uses glm.h? ["undefined references"]

GlewInit

Help GLM, GLEW and GLWF!