void Camera::SetViewportSize(float width, float height)
{
camWidth = width;
camHeight = height;
camAspectRatio = camWidth / camHeight;
CalculatePerspectiveMatrix();
}
void NativeApplication::OpenGLInit(HWND wnd, HDC deviceContext, HGLRC renderingContext)
{
// GL thread class had loaded dummy context
if (!gl.LoadOpenGLES2Functions())
throw NativeException("OpenGLES2 function loading failed");
hwnd = wnd;
m_deviceContext = deviceContext;
m_renderingContext = renderingContext;
if (!ContextUtil::DestroyDummyAndCreateRealContext(gl, hwnd, &m_deviceContext, &m_renderingContext))
return;
std::vector<GLuint> shaderList;
try
{
shaderList.push_back(ShaderUtil::LoadAndCompileShader(GL_VERTEX_SHADER, "..\\NativeApp\\shaders\\LocalTransform.vert"));
shaderList.push_back(ShaderUtil::LoadAndCompileShader(GL_FRAGMENT_SHADER, "..\\NativeApp\\shaders\\StandardColors.frag"));
theProgram = ShaderUtil::CreateProgram(shaderList);
}
catch(NativeException&) { throw; }
offsetUniform = glGetUniformLocation(theProgram, "offset");
modelMatrixUnif = glGetUniformLocation(theProgram, "modelMatrix");
perspectiveMatrixUnif = glGetUniformLocation(theProgram, "perspectiveMatrix");
CalculatePerspectiveMatrix();
glUseProgram(theProgram);
glUniformMatrix4fv(perspectiveMatrixUnif, 1, GL_FALSE, perspectiveMatrix);
glUseProgram(0);
InitializeVertexBuffer();
// VAO is necessary when using core profile, unless code is run using NVidia card. At least, that's how I understood this obscure subject.
// see https://www.opengl.org/discussion_boards/showthread.php/181092-Drawing-a-single-point-without-VAO-on-NVIDIA-and-AMD
gl.glGenVertexArrays(1, &vao);
gl.glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBufferObject);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
}