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//C++ header file - Open Producer - Copyright (C) 2002 Don Burns
//Distributed under the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE (LGPL)
//as published by the Free Software Foundation.
// This is a simple example of a Producer::Camera::SceneHandler
#ifndef PRODUCER_EXAMPLES_MYSCENEHANDLER
#define PRODUCER_EXAMPLES_MYSCENEHANDLER
#include <Producer/Camera>
#include <GL/gl.h>
#include <GL/glu.h>
// Use the OpenGL teapot as a sample object to draw
// Borrowed from the glut distribution.
extern void glutSolidTeapot(GLdouble scale);
class MySceneHandler : public Producer::Camera::SceneHandler
{
public:
MySceneHandler() : Producer::Camera::SceneHandler(),
_angle(0.0f),
_initialized(false)
{}
// Producer::Camera::SceneHandler is pure virtual and
// requires that the draw() method be implemented in
// derived classes.
virtual void draw( Producer::Camera & camera )
{
// Lazy initialize
if( !_initialized ) init();
// Clear the Camera's RenderSurface ProjectionRect
camera.clear();
// Apply the Projection parameters
camera.applyLens();
// Place the Camera into the world
camera.setViewByLookat( 0.0f, 0.0f, 4.0f, /// Position of the eye
0.0f, 0.0f, 0.0f, /// Point the eye is looking at
0.0f, 1.0f, 0.0f ); /// Up
glPushMatrix();
glRotatef( _angle, 0, 1, 0 );
// Draw the OpenGL teapot
glutSolidTeapot(1.0);
glPopMatrix();
_angle++;
}
// Initialize Graphics state
void init()
{
glEnable( GL_DEPTH_TEST );
glEnable( GL_LIGHTING );
glEnable( GL_LIGHT0 );
glClearColor( 0.2f, 0.2f, 0.4f, 1.0f );
_initialized = true;
}
private:
float _angle;
bool _initialized;
};
#endif
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