I am trying to build a cross platform game, using the OpenGL ES 2.0 spec/libraries. Windows 10 UWP should be supported, so I am not sure what I am doing wrong that is causing tons of errors around GL objects/methods not being defined.

I have tried two methods of importing "angle" first, I added the nuget package, and added the package include directory in the project. Then I tried cloning the repo and just adding the include directory. Both of them yield the same series of errors.

Here is an example output.

Here is my code.

Cube.cpp


#include "Cube.h"

float _rotation;

static GLint vertices[][3] = { { -0x10000, -0x10000, -0x10000 }, { 0x10000, -0x10000, -0x10000 }, { 0x10000, 0x10000, -0x10000 }, { -0x10000, 0x10000, -0x10000 }, { -0x10000, -0x10000, 0x10000 }, { 0x10000, -0x10000, 0x10000 }, { 0x10000, 0x10000, 0x10000 }, { -0x10000, 0x10000, 0x10000 } };

static GLint colors[][4] = { { 0x00000, 0x00000, 0x00000, 0x10000 }, { 0x10000, 0x00000, 0x00000, 0x10000 }, { 0x10000, 0x10000, 0x00000, 0x10000 }, { 0x00000, 0x10000, 0x00000, 0x10000 }, { 0x00000, 0x00000, 0x10000, 0x10000 }, { 0x10000, 0x00000, 0x10000, 0x10000 }, { 0x10000, 0x10000, 0x10000, 0x10000 }, { 0x00000, 0x10000, 0x10000, 0x10000 } };

GLubyte indices[] = { 0, 4, 5, 0, 5, 1, 1, 5, 6, 1, 6, 2, 2, 6, 7, 2, 7, 3, 3, 7, 4, 3, 4, 0, 4, 7, 6, 4, 6, 5, 3, 0, 1, 3, 1, 2 };

void Cube_setupGL(double width, double height) { // Initialize GL state. glDisable(GL_DITHER); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); glClearColor(1.0f, 0.41f, 0.71f, 1.0f); glEnable(GL_CULL_FACE); glShadeModel(GL_SMOOTH); glEnable(GL_DEPTH_TEST);

glViewport(0, 0, width, height);
GLfloat ratio = (GLfloat)width / height;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustumf(-ratio, ratio, -1, 1, 1, 10);

}

void Cube_tearDownGL() { }

void Cube_update() { _rotation += 1.f;

} void Cube_prepare() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); }

void Cube_draw() { glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0, 0, -3.0f); glRotatef(_rotation * 0.25f, 1, 0, 0); // X glRotatef(_rotation, 0, 1, 0); // Y

glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);

glFrontFace(GL_CW);
glVertexPointer(3, GL_FIXED, 0, vertices);
glColorPointer(4, GL_FIXED, 0, colors);
glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_BYTE, indices);

}

This is the exact example code that is provided for a new Visual Studio 2019 Android and iOS OpenGL ES mobile application. I have taken the Mobile Shared code, and moved it out to a Shared folder, that a Win10 UWP application could also use.

> Here is my Cube.h

ifndef HelloCubeNativemain__

define HelloCubeNativemain__

include

ifdef ANDROID

include <GLES/gl.h>

elif APPLE

include <OpenGLES/ES1/gl.h>

elif WINDOWS

include "GLES2/gl2.h"

include "GLES2/gl2ext.h"

include "GLES2/gl2platform.h"

include "GLES2/gl2ext_angle.h

endif

void Cube_setupGL(double width, double height); void Cube_tearDownGL(); void Cube_update(); void Cube_prepare(); void Cube_draw();

endif / defined(HelloCubeNativemain__) /


and I have tried defining `#define __WINDOWS__` in both `pch.h` and `MainPage.xaml.h` They are still yielding the same errors.

![image](https://user-images.githubusercontent.com/8485314/59477473-ef80cb80-8e1a-11e9-97af-0ba9e525c759.png)
Above I have provided the Additional Include Directories. The angle/include contain the GLES2, EGL, GLES3 folders, so this would indicate they are in the correct place. Additionally the Shared folder from the image, contains the `Cube.h` and `Cube.cpp` folder. The android and iOS projects compile no problem.

microsoft / angle

GLint Is Undefined, and More #166