OSDTransformNode.cc

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//================================================================
//
//  CLASS OSDTransformNode - IMPLEMENTATION
//
//================================================================


//== INCLUDES ====================================================


#include "OSDTransformNode.hh"

#include <ACG/Scenegraph/SceneGraph.hh>


//== NAMESPACES ==================================================


namespace ACG {
namespace SceneGraph {


//== IMPLEMENTATION ==============================================


void OSDTransformNode::enterOSD( GLState &_state, const DrawModes::DrawMode &_drawMode )
{
        _state.push_modelview_matrix();

        int left, bottom, width, height;
        _state.get_viewport( left, bottom, width, height );

        double aspect = _state.aspect();

        _state.push_projection_matrix();
        _state.reset_projection();

        _state.perspective( 45.0, aspect, 0.8, 20.0 );

        _state.push_modelview_matrix();
        _state.reset_modelview();

        double posX = left   + center_[0] * width;
        double posY = bottom + center_[1] * height;

        ACG::Vec3d pos = _state.unproject( ACG::Vec3d( posX, posY, 0.1 ) );

        _state.pop_modelview_matrix();

        GLMatrixd modelview = _state.modelview();

        modelview(0,3) = 0.0;
        modelview(1,3) = 0.0;
        modelview(2,3) = 0.0;

        _state.set_modelview( modelview );
        _state.translate( pos[0], pos[1], pos[2], MULT_FROM_LEFT );
}


//----------------------------------------------------------------


void OSDTransformNode::leaveOSD( GLState &_state, const DrawModes::DrawMode &_drawMode )
{
        _state.pop_projection_matrix();
        _state.pop_modelview_matrix();
}


//================================================================


} // namespace SceneGraph
} // namespace ACG