/**
* Initialize an EGL context for the current display.
*/
int Engine::InitDisplay()
{
if( !initialized_resources_ )
{
gl_context_->Init( app_->window );
LoadResources();
initialized_resources_ = true;
}
else
{
// initialize OpenGL ES and EGL
if( EGL_SUCCESS != gl_context_->Resume( app_->window ) )
{
UnloadResources();
LoadResources();
}
}
ShowUI();
// Initialize GL state.
glEnable( GL_CULL_FACE );
glEnable( GL_DEPTH_TEST );
glDepthFunc( GL_LEQUAL );
//Note that screen size might have been changed
glViewport( 0, 0, gl_context_->GetScreenWidth(), gl_context_->GetScreenHeight() );
renderer_.UpdateViewport();
tap_camera_.SetFlip( 1.f, -1.f, -1.f );
tap_camera_.SetPinchTransformFactor( 10.f, 10.f, 8.f );
return 0;
}
/**
* Just the current frame in the display.
*/
void Engine::DrawFrame() {
float fps;
if (monitor_.Update(fps)) {
UpdateFPS(fps);
}
double dTime = monitor_.GetCurrentTime();
renderer_.Update(dTime);
// Just fill the screen with a color.
glClearColor(0.5f, 0.5f, 0.5f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
renderer_.Render();
// Swap
if (EGL_SUCCESS != gl_context_->Swap()) {
UnloadResources();
LoadResources();
}
}
/**
* Initialize an EGL context for the current display.
*/
int Engine::InitDisplay(android_app *app) {
if (!initialized_resources_) {
gl_context_->Init(app_->window);
LoadResources();
initialized_resources_ = true;
} else if(app->window != gl_context_->GetANativeWindow()) {
// Re-initialize ANativeWindow.
// On some devices, ANativeWindow is re-created when the app is resumed
assert(gl_context_->GetANativeWindow());
UnloadResources();
gl_context_->Invalidate();
app_ = app;
gl_context_->Init(app->window);
LoadResources();
initialized_resources_ = true;
} else {
// initialize OpenGL ES and EGL
if (EGL_SUCCESS == gl_context_->Resume(app_->window)) {
UnloadResources();
LoadResources();
} else {
assert(0);
}
}
ShowUI();
// Initialize GL state.
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
// Note that screen size might have been changed
glViewport(0, 0, gl_context_->GetScreenWidth(), gl_context_->GetScreenHeight());
renderer_.UpdateViewport();
tap_camera_.SetFlip(1.f, -1.f, -1.f);
tap_camera_.SetPinchTransformFactor(10.f, 10.f, 8.f);
return 0;
}
/**
* Unload resources
*/
void Engine::UnloadResources()
{
renderer_.Unload();
}
/**
* Load resources
*/
void Engine::LoadResources()
{
renderer_.Init( NUM_TEAPOTS_X, NUM_TEAPOTS_Y, NUM_TEAPOTS_Z );
renderer_.Bind( &tap_camera_ );
}