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

[kiran kumari via Digitalmars-d-learn]

On Wednesday, 24 September 2014 at 03:08:55 UTC, csmith wrote:
> 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
see more example
http://techgurulab.com/course/java-quiz-online/
> 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