#include <osg/Camera>
#include <osg/Group>
#include <osg/MatrixTransform>
#include <osg/Texture2D>
#include <osg/TextureRectangle>
#include <osgShadow/ShadowedScene>

struct Pipeline
{
    int textureSize;
    osg::ref_ptr<osg::Group> graph;
    osg::Texture *pass1Shadows;
    osg::Texture *pass2Colors;
    osg::Texture *pass2Normals;
    osg::Texture *pass2Positions;
    osg::Texture *pass3Final;
};

osg::TextureRectangle *createFloatTextureRectangle();

osg::Camera *createHUDCamera(double left   = 0,
                             double right  = 1,
                             double bottom = 0,
                             double top    = 1);

osg::ref_ptr<osg::LightSource> createLight(const osg::Vec3 &pos);

Pipeline createPipelineEffectCompositor(
        osg::ref_ptr<osg::Group> scene,
        osg::ref_ptr<osgShadow::ShadowedScene> shadowedScene,
        const osg::Vec3 lightPos);

Pipeline createPipelinePlainOSG(
        osg::ref_ptr<osg::Group> scene,
        osg::ref_ptr<osgShadow::ShadowedScene> shadowedScene,
        const osg::Vec3 lightPos);

osg::Camera *createRTTCamera(osg::Camera::BufferComponent buffer,
                             osg::Texture *tex,
                             bool isAbsolute = false);

osg::ref_ptr<osg::Group> createSceneRoom();

osg::Geode *createScreenQuad(float width,
                             float height,
                             float scale = 1,
                             osg::Vec3 corner = osg::Vec3());

osg::Texture2D *createTexture(const std::string &fileName);

osg::ref_ptr<osg::Camera> createTextureDisplayQuad(const osg::Vec3 &pos,
                                                   osg::StateAttribute *tex,
                                                   float scale,
                                                   float width  = 0.3,
                                                   float height = 0.2);

void setAnimationPath(osg::ref_ptr<osg::MatrixTransform> node,
                      const osg::Vec3 &center,
                      float time,
                      float radius);

osg::ref_ptr<osg::StateSet> setShaderProgram(osg::ref_ptr<osg::Camera> pass,
                                             const std::string& vert,
                                             const std::string& frag);