Trying to get Derelict.opengl3.gl3 and derelict.glfw3.glfw3 to work together

[csmith via Digitalmars-d-learn]

Hi everyone,

I've got derelict.opengl3.gl3 and derelict.glfw3.glfw3 setup with 
dub and can get a window to open up and close with glfw3. I can 
also use glClear(GL_COLOR_BUFFER_BIT); however, beyond this most 
OpenGL commands fail and I can't seem to figure out how to fix it.

Code:

     import std.stdio;
     import derelict.opengl3.gl3, derelict.glfw3.glfw3;

     void main(string args[])
     {
         DerelictGL3.load(); // Loads OpenGL v1.0 and v1.1
         DerelictGLFW3.load(); // Loads GLFW3

         assert (glfwInit(), "Failed to initialize GLFW3");
         scope (exit) glfwTerminate();

         glfwSetErrorCallback(&error_callback);

         auto window = glfwCreateWindow(640, 480, "Simple 
example", null, null);	
         assert (window !is null);

         glfwMakeContextCurrent(window);
         auto vers = DerelictGL3.reload(); // Created GLFW3 
context, so GL3 needs to be reloaded
	
         while (!glfwWindowShouldClose(window)) {
             if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
                 glfwSetWindowShouldClose(window, GL_TRUE);
		
             glClear(GL_COLOR_BUFFER_BIT);
             glBegin(GL_POINTS);
             glEnd();
		
             glfwSwapBuffers(window);
             glfwPollEvents();
         }

         glfwDestroyWindow(window);
         glfwTerminate();
     }

     extern (C) void error_callback(int error, const(char)* 
description) nothrow {
         printf("%s %s", error, description);
     }

Compiler Output:

     derelict-util: ["derelict-util"]
     derelict-util: ["derelict-util"]
     derelict-glfw3: ["derelict-glfw3", "derelict-util"]
     derelict-util: ["derelict-util"]
     derelict-gl3: ["derelict-gl3", "derelict-util"]
     myproj: ["myproj", "derelict-util", "derelict-glfw3", 
"derelict-util", "derelict-gl3", "derelict-util"]
     Target is up to date. Using existing build in 
/home/csmith/.dub/packages/derelict-util-1.0.2/.dub/build/library-debug-linux.posix-x86_64-dmd-A741715720F146208FFF241F87E468DD/. 
Use --force to force a rebuild.
     Target is up to date. Using existing build in 
/home/csmith/.dub/packages/derelict-glfw3-1.0.2/.dub/build/library-debug-linux.posix-x86_64-dmd-DD1819CE8266F370192AAD3190CA5B06/. 
Use --force to force a rebuild.
     Target is up to date. Using existing build in 
/home/csmith/.dub/packages/derelict-gl3-1.0.6/.dub/build/library-debug-linux.posix-x86_64-dmd-59B635D839F3A8CFC2737986D4B622FD/. 
Use --force to force a rebuild.
     Building myproj configuration "application", build type debug.
     Compiling...
     source/app.d(25): Error: undefined identifier glBegin
     source/app.d(26): Error: undefined identifier glEnd
     FAIL 
.dub/build/application-debug-linux.posix-x86_64-dmd-357CCD4CB91CACEC384AF7BAA514E3A7 
myproj executable
     Error executing command run: DMD compile run failed with exit 
code 1

Any ideas?

Thanks,
Charles