void Entity::Render( float ticks ) throw(std::exception)
{
DoUpdate(ticks);
glPushMatrix();
glMultMatrixf( GetRenderState()->GetMatrix() );
uint32_t flags = GetRenderState()->GetFlags();
int gl_blend_src(0), gl_blend_dst(0);
int alpha_enabled;
glGetIntegerv(GL_ALPHA_TEST, &alpha_enabled);
if (!alpha_enabled && (flags & RenderState::ALPHA_F) )
{
glGetIntegerv(GL_BLEND_SRC, &gl_blend_src);
glGetIntegerv(GL_BLEND_DST, &gl_blend_dst);
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_ALPHA_TEST);
}
else if (alpha_enabled && (flags & RenderState::ALPHA_F) == 0 )
{
glDisable(GL_ALPHA_TEST);
}
int blend_enabled;
glGetIntegerv(GL_BLEND, &blend_enabled);
if (!blend_enabled && (flags & RenderState::BLEND_F) )
{
glEnable(GL_BLEND);
}
else if ( blend_enabled && (flags & RenderState::BLEND_F) == 0 )
{
glDisable(GL_BLEND);
}
for( auto it = m_RenderList.begin(); it != m_RenderList.end(); ) {
EntityPtr entity = *it;
if ( entity->AreFlagsSet( Entity::F_ENABLE ) ) {
entity->Render( ticks );
}
if ( entity->AreFlagsSet( Entity::F_DELETE ) ) {
it = m_RenderList.erase( it );
continue;
}
++it;
}
DoRender();
if (!alpha_enabled && (flags & RenderState::ALPHA_F) )
{
glBlendFunc( gl_blend_src, gl_blend_dst);
}
glPopMatrix();
}
void Buffered::Render( float ticks )
{
// backup viewport
GLint vp[4];
glGetIntegerv( GL_VIEWPORT, vp );
GLfloat depth[2];
glGetFloatv( GL_DEPTH_RANGE, depth );
// backup projection matrix for internal storage
Matrix modelview;
glGetFloatv( GL_MODELVIEW_MATRIX, (float*)modelview );
Matrix projection;
glGetFloatv( GL_PROJECTION_MATRIX, (float*)projection );
m_FrameBuffer.Enable();
// background color
glClearColor( 1,1,1,1 );
// clear buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
for( auto it = m_RenderList.begin(); it != m_RenderList.end(); ) {
EntityPtr entity = *it;
if ( entity->AreFlagsSet( Entity::F_ENABLE ) ) {
entity->Render(ticks);
}
if ( entity->AreFlagsSet( Entity::F_DELETE ) ) {
it = m_RenderList.erase( it );
continue;
}
++it;
}
m_FrameBuffer.Disable();
// restore view port
glViewport( vp[0], vp[1], vp[2], vp[3]);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf( projection );
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf( modelview );
DoUpdate( ticks );
// render local list into texture
glPushMatrix();
glMultMatrixf(GetRenderState()->GetMatrix());
Cube::DoRender();
glPopMatrix();
}