void Window::initializeGL()
{
// Initialize OpenGL Backend
initializeOpenGLFunctions();
printContextInformation();
// Set global information
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
}
//
// OPENGL FUNCTIONS ////////////////////////////////////////////////////////
//
void GLWidget::initializeGL()
{
// Initialize OpenGL Backend
initializeOpenGLFunctions();
printContextInformation();
// Application Specific Initialization
{
// Create Shader (No release until VAO)
program = new QOpenGLShaderProgram();
program->addShaderFromSourceFile( QOpenGLShader::Vertex,
":/shaders/simple.vs" );
program->addShaderFromSourceFile( QOpenGLShader::Fragment,
":/shaders/simple.fs" );
program->link();
program->bind();
// Cache Uniform Locations
model_to_world = program->uniformLocation( "model_to_world" );
world_to_eye = program->uniformLocation( "world_to_eye" );
eye_to_clip = program->uniformLocation( "eye_to_clip" );
// Create Buffer (No release until VAO)
vertex_buffer.create();
vertex_buffer.bind();
vertex_buffer.setUsagePattern( QOpenGLBuffer::StaticDraw );
vertex_buffer.allocate( sg_vertexes, sizeof( sg_vertexes ) );
// Create Vertex Array Object (VAO)
vao.create();
vao.bind();
program->enableAttributeArray( 0 );
program->enableAttributeArray( 1 );
program->setAttributeBuffer( 0, GL_FLOAT, Vertex::positionOffset(),
Vertex::PositionTupleSize, Vertex::stride() );
program->setAttributeBuffer( 1, GL_FLOAT, Vertex::colorOffset(),
Vertex::ColorTupleSize, Vertex::stride() );
// Release All (Order matters!!!)
vao.release();
vertex_buffer.release();
program->release();
}
}
