Renderer.h

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// Copyright (C) 2005 Dave Griffiths
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
#ifndef N_RENDERER
#define N_RENDERER

#include <sys/time.h>
#include "dada.h"
#include "deque"
#include "map"
#include "vector"
#include "string"
#include "Camera.h"
#include "SceneGraph.h"
#include "ImmediateMode.h"
#include "Light.h"
#include "TexturePainter.h"

// TODO: check this works for Apple's OpenGL
#ifndef GL_POLYGON_OFFSET_EXT
#define GL_POLYGON_OFFSET_EXT ((GLenum)0x8037) 
#endif

using namespace std;

namespace Fluxus
{

class State;
class Primitive;


class Renderer
{
public:
    Renderer();
    ~Renderer();
    
    void Render();
    void Clear();
    
    State *GetState();
    void ApplyState();
    void PushState();
    void PopState();
    void Grab(int ID);
    void UnGrab();
    Primitive *Grabbed() { return m_Grabbed; }
    
    int          AddPrimitive(Primitive *Prim);
    Primitive   *GetPrimitive(int ID);
    void         RemovePrimitive(int ID);
    void         DetachPrimitive(int ID);
    dMatrix      GetGlobalTransform(int ID);
    dBoundingBox GetBoundingBox(int ID);
    void         RenderPrimitive(Primitive *Prim);
    int          Select(int x, int y, int size);
    
    int AddLight(Light *l);
    Light *GetLight(int id);
    void ClearLights();

    Camera *GetCamera() { return &m_Camera; }

    const SceneGraph &GetSceneGraph()        { return m_World; }
        
    enum stereo_mode_t {noStereo, crystalEyes, colourStereo};
    
    void DrawText(const string &Text);
    void Reinitialise()                      { m_Initialised=false; }
    void SetMotionBlur(bool s, float a=0.02) { m_MotionBlur=s; m_Fade=a; }
    void SetResolution(int x, int y)         { m_Width=x; m_Height=y; m_Initialised=false; }
    void GetResolution(int &x, int &y)       { x=m_Width; y=m_Height; }
    void InitTextures()                      { TexturePainter::Get()->Initialise(); }
    unsigned int LoadTexture(const string &Filename, bool ignorecache=false) { return TexturePainter::Get()->LoadTexture(Filename,ignorecache); }
    void ShowAxis(bool s)                    { m_ShowAxis=s; }
    void ShowCursor(bool s);
    void SetBGColour(const dColour &s)       { m_BGColour=s; }
    void SetClearFrame(bool s)               { m_ClearFrame=s; }
    void SetClearZBuffer(bool s)             { m_ClearZBuffer=s; }
    void SetClearAccum(bool s)               { m_ClearAccum=s; }
    void SetBackFaceCull(bool s)             { m_BackFaceCull=s; m_Initialised=false; }
    void SetFaceOrderClockwise(bool s)       {  m_FaceOrderClockwise=s; m_Initialised=false; }
    void SetDesiredFPS(float s)              { m_Deadline=1/s; }
    void SetFPSDisplay(bool s)               { m_FPSDisplay=s; }
    void SetFog(const dColour &c, float d, float s, float e)    
        { m_FogColour=c; m_FogDensity=d; m_FogStart=s; m_FogEnd=e; m_Initialised=false; }
    void ShadowLight(unsigned int s)         { m_ShadowLight=s; }
    void DebugShadows(bool s)                { m_World.GetShadowVolumeGen()->SetDebug(s); }
    void ShadowLength(float s)               { m_World.GetShadowVolumeGen()->SetLength(s); }
    double GetTime()                         { return m_Time; }
    double GetDelta()                        { return m_Delta; }
    bool SetStereoMode(stereo_mode_t mode);
    stereo_mode_t GetStereoMode(){ return m_StereoMode;}
    
    void SetColourMask(bool inred, bool ingreen, bool inblue, bool inalpha);
    void Accum(int mode, float factor);
    void DrawBuffer(GLenum mode);
    void ReadBuffer(GLenum mode);
    
    
private:
    void PreRender(bool PickMode=false);
    void PostRender();
    void RenderLights(bool camera);
    void RenderStencilShadows();
    
    bool  m_Initialised;
    bool  m_InitLights;
    int   m_Width,m_Height;
    bool  m_MotionBlur;
    float m_Fade;
    bool  m_ShowAxis;
    Primitive *m_Grabbed;
    dColour m_BGColour;
    bool m_ClearFrame;
    bool m_ClearZBuffer;
    bool m_ClearAccum;
    bool m_BackFaceCull;
    bool m_FaceOrderClockwise;
    dColour m_FogColour; 
    float m_FogDensity; 
    float m_FogStart; 
    float m_FogEnd;
    unsigned int m_ShadowLight;
    
    deque<State> m_StateStack;
    SceneGraph m_World;
    vector<Light*> m_LightVec;
    Camera m_Camera;
    ImmediateMode m_ImmediateMode;
    
    // info for picking mode
    struct SelectInfo
    {
        int x,y;
        int size;
    };
    
    SelectInfo m_SelectInfo;
    stereo_mode_t m_StereoMode;
    bool m_MaskRed,m_MaskGreen,m_MaskBlue,m_MaskAlpha;
    
    timeval m_LastTime;
    float m_Deadline;
    bool m_FPSDisplay;
    double m_Time;
    double m_Delta;
};
    
};

#endif

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