source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/ResourceManager.cpp @ 3215

#include "ResourceManager.h"
#include "Matrix4x4.h"
#include "Geometry.h"
#include "SceneEntity.h"
#include "Material.h"
#include "Texture.h"
#include "gzstream.h"
#include "Vector3.h"
#include "Transform3.h"
#include "Shape.h"
#include "LODInfo.h"
#include "RenderState.h"
#include "ShaderProgram.h"
#include "ShaderManager.h"


#ifdef _CRT_SET
        #define _CRTDBG_MAP_ALLOC
        #include <stdlib.h>
        #include <crtdbg.h>

        // redefine new operator
        #define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
        #define new DEBUG_NEW
#endif


using namespace std;


namespace CHCDemoEngine
{


// only instance of the resource manager
ResourceManager *ResourceManager::sResourceManager = NULL;


ResourceManager::ResourceManager()
{ 
        mUseNormalMapping = false;
}


ResourceManager::~ResourceManager()
{
        // delete all resources.
        CLEAR_CONTAINER(mSceneEntities);
        CLEAR_CONTAINER(mGeometry);
        CLEAR_CONTAINER(mMaterials);
        CLEAR_CONTAINER(mTextures);
        CLEAR_CONTAINER(mTrafos);
        CLEAR_CONTAINER(mShapes);
}


void ResourceManager::DelSingleton()
{
        DEL_PTR(sResourceManager);
}


SceneEntity *ResourceManager::LoadSceneEntity(igzstream &str)
{       
        bool hasTrafo;
        str.read(reinterpret_cast<char *>(&hasTrafo), sizeof(bool));
        
        SceneEntity *sceneGeom;
        Transform3 *trafo;

        if (!hasTrafo)
        {       
                trafo = new Transform3(); // identity
        }
        else
        {
                Matrix4x4 m;
                str.read(reinterpret_cast<char *>(m.x), sizeof(Matrix4x4));
                trafo = new Transform3(m);
        }

        mTrafos.push_back(trafo);

        sceneGeom = new SceneEntity(trafo);


        ///////////////
        //-- load LOD levels

        // note: lods must be ordered from smallest distance to largest
        int numLODs;
        str.read(reinterpret_cast<char *>(&numLODs), sizeof(int));

        for (int i = 0; i < numLODs; ++ i)
        {
                // the distance until the next LOD level is used
                float dist;
                str.read(reinterpret_cast<char *>(&dist), sizeof(float));

                int numShapes;
                str.read(reinterpret_cast<char *>(&numShapes), sizeof(int));

                //LODLevel *lodLevel = new LODLevel(dist);
                LODLevel lodLevel(dist);

                for (int j = 0; j < numShapes; ++ j)
                {
                        int shapeId;
                        str.read(reinterpret_cast<char *>(&shapeId), sizeof(int));

                        Geometry *geom = mGeometryTable[shapeId];
                        Material *mat = mMaterialTable[shapeId];

                        // create shape
                        Shape *shape = new Shape(geom, mat);
                        mShapes.push_back(shape);

                        sceneGeom->AddShape(shape);
                        lodLevel.AddShape(shape);
                }

                //mLODs.push_back(lodLevel);
                sceneGeom->AddLODLevel(lodLevel);
        }


        static ShaderProgram *sTreeAnimationProgram = 
                ShaderManager::GetSingleton()->GetShaderProgram("treeAnimation");
        static ShaderProgram *sTreeAnimationProgramMrt = 
                ShaderManager::GetSingleton()->GetShaderProgram("treeAnimationMrt");


        ///////////
        //-- hack: add tree animation (should be done per material script!)

        if (numLODs > 1)
        {
                ShapeContainer::iterator sstart, send;

                // only use shader for the first two lod levels (the non-billboards)
                for (int i = 0; i < min(numLODs, 2); ++ i)
                //for (int i = 0; i < numLODs; ++ i)
                {
                        sceneGeom->GetLODLevel(i, sstart, send);

                        for (ShapeContainer::iterator it = sstart; it != send; ++ it)
                        {
                                Shape *shape = *it;

                                Material *mat = shape->GetMaterial();

                                // add the vertex animation program
                                for (int i = 0; i < 3; ++ i)
                                {
                                        Technique *tech = mat->GetTechnique(i);

                                        GPUProgramParameters *vtxParams = tech->GetVertexProgramParameters();

                                        if (i == 0)
                                        {
                                                tech->SetVertexProgram(sTreeAnimationProgram);
                                                vtxParams->SetLightDirParam(5);
                                        }
                                        else
                                        {
                                                tech->SetVertexProgram(sTreeAnimationProgramMrt);
                                                vtxParams->SetOldTimerParam(5);
                                        }

                                        /// use a timer to simulate the moving of the tree in the wind
                                        vtxParams->SetTimerParam(0);

                                        // wind direction
                                        static Vector3 windDir = Normalize(Vector3(0.8f, 0.2f, 0.0f));
                                        vtxParams->SetValue3f(1, windDir.x, windDir.y, windDir.z);
                                        // amplitude
                                        vtxParams->SetValue1f(2, 0.3f);

                                        AxisAlignedBox3 box = sceneGeom->GetBoundingBox();
                                        vtxParams->SetValue2f(3, box.Min().z, box.Max().z);
                                        // frequency
                                        vtxParams->SetValue1f(4, 0.1f);
                                }
                        }
                }
        }

        return sceneGeom;
}


void ResourceManager::LoadTextures(igzstream &str)
{
        int numTextures;
        str.read(reinterpret_cast<char *>(&numTextures), sizeof(int));
        
        for (int i = 0; i < numTextures; ++ i)
        {
                // load texture name
                int texnameSize;
                str.read(reinterpret_cast<char *>(&texnameSize), sizeof(int));

                char *texname = new char[texnameSize];
                str.read(texname, sizeof(char) * texnameSize);

                Texture *tex = new Texture(model_path + texname);

                int boundS, boundT;

                str.read(reinterpret_cast<char *>(&boundS), sizeof(int));
                str.read(reinterpret_cast<char *>(&boundT), sizeof(int));

                tex->SetBoundaryModeS(boundS);
                tex->SetBoundaryModeT(boundT);

                tex->Create();

                mTextureTable[i] = tex;
                mTextures.push_back(tex);

                delete [] texname;
        }

        cout << "loaded " << (int)mTextureTable.size() << " textures" << endl;
}

// mtt todo_ split that up
void ResourceManager::LoadShapes(igzstream &str)
{
        int numShapes;
        str.read(reinterpret_cast<char *>(&numShapes), sizeof(int));

        for (int i = 0; i < numShapes; ++ i)
        {
                Geometry *geom = LoadGeometry(str);
                Material *mat = LoadMaterial(str);

                mGeometryTable[i] = geom;
                mMaterialTable[i] = mat;                

                mGeometry.push_back(geom);
                mMaterials.push_back(mat);
        }

        cout << "loaded " << (int)mGeometryTable.size() << " shapes" << endl;
}


Material *ResourceManager::LoadMaterial(igzstream &str)
{
        // default material
        Material *mat = new Material();
        
        // set default fragment + vertex programs
        Technique *tech = mat->GetDefaultTechnique();

        // texture
        int texId;
        str.read(reinterpret_cast<char *>(&texId), sizeof(int));

        if (texId >= 0)
                tech->SetTexture(mTextureTable[texId]);
        
        str.read(reinterpret_cast<char *>(&tech->mAlphaTestEnabled), sizeof(bool));
        str.read(reinterpret_cast<char *>(&tech->mCullFaceEnabled), sizeof(bool));

        // gl material
        bool hasGlMaterial;
        str.read(reinterpret_cast<char *>(&hasGlMaterial), sizeof(bool));

        if (hasGlMaterial)
        {
                // only write rgb part of the material
                str.read(reinterpret_cast<char *>(&tech->mAmbientColor), sizeof(Vector3));
                str.read(reinterpret_cast<char *>(&tech->mDiffuseColor), sizeof(Vector3));
                str.read(reinterpret_cast<char *>(&tech->mEmmisiveColor), sizeof(Vector3));
                str.read(reinterpret_cast<char *>(&tech->mSpecularColor), sizeof(Vector3));
        }


        ///////////////
        //-- add technique for deferred shading

        static ShaderProgram *sDefaultFragmentProgramMrt = ShaderManager::GetSingleton()->GetShaderProgram("defaultFragmentMrt");
        static ShaderProgram *sDefaultFragmentTexProgramMrt = ShaderManager::GetSingleton()->GetShaderProgram("defaultFragmentTexMrt");
        static ShaderProgram *sDefaultVertexProgramMrt = ShaderManager::GetSingleton()->GetShaderProgram("defaultVertexMrt");

        static ShaderProgram *sNormalMappingVertexProgramMrt = ShaderManager::GetSingleton()->GetShaderProgram("normalMappingVertexMrt");
        static ShaderProgram *sNormalMappingFragmentProgramMrt = ShaderManager::GetSingleton()->GetShaderProgram("normalMappingFragmentMrt");


        Technique *deferred = new Technique(*tech);

        if (mUseNormalMapping)
        {
                deferred->SetFragmentProgram(sNormalMappingFragmentProgramMrt);
                deferred->SetVertexProgram(sNormalMappingVertexProgramMrt);
        }
        else
        {
                if (deferred->GetTexture())
                        deferred->SetFragmentProgram(sDefaultFragmentTexProgramMrt);
                else
                        deferred->SetFragmentProgram(sDefaultFragmentProgramMrt);

                deferred->SetVertexProgram(sDefaultVertexProgramMrt);
        }

        deferred->GetFragmentProgramParameters()->SetViewMatrixParam(0);
        
        deferred->GetVertexProgramParameters()->SetModelMatrixParam(1);
        deferred->GetVertexProgramParameters()->SetOldModelMatrixParam(2);

        mat->AddTechnique(deferred);
        

        ///////////
        //-- add depth pass

        Technique *depthPass = new Technique(*tech);

        depthPass->SetColorWriteEnabled(false);
        depthPass->SetLightingEnabled(false);
        mat->AddTechnique(depthPass);

        return mat;
}


Geometry *ResourceManager::LoadGeometry(igzstream &str)
{
        Vector3 *vertices;
        Vector3 *normals;
        Texcoord2 *texcoords;


        //////////////
        //-- read in vertices

        int vertexCount;
        str.read(reinterpret_cast<char *>(&vertexCount), sizeof(int));
        
        // end of file reached
        if (str.eof()) return NULL;

        vertices = new Vector3[vertexCount];
    str.read(reinterpret_cast<char *>(vertices), sizeof(Vector3) * vertexCount);
        
        normals = new Vector3[vertexCount];
        str.read(reinterpret_cast<char *>(normals), sizeof(Vector3) * vertexCount);

        Vector3 *tangents;

        if (mUseNormalMapping)
        {
                tangents = new Vector3[vertexCount];
                str.read(reinterpret_cast<char *>(tangents), sizeof(Vector3) * vertexCount);
        }
        else
        {
                tangents = NULL;
        }

        int texCoordCount;
        str.read(reinterpret_cast<char *>(&texCoordCount), sizeof(int));


        if (texCoordCount)
        {
                texcoords = new Texcoord2[texCoordCount];
                str.read(reinterpret_cast<char *>(texcoords), sizeof(Texcoord2) * texCoordCount);
        }
        else
        {
                texcoords = NULL;
        }

        const bool delGeometry = false;
        return new Geometry(vertices, normals, texcoords, vertexCount, delGeometry, NULL);//tangents);
}


void ResourceManager::LoadSceneEntities(igzstream &str, 
                                                                                SceneEntityContainer &entities)
{
        int entityCount;
        str.read(reinterpret_cast<char *>(&entityCount), sizeof(int));

        entities.reserve(entityCount);

        for (int i = 0; i < entityCount; ++ i)
        {
                SceneEntity *ent = LoadSceneEntity(str);

                // return loaded entities
                entities.push_back(ent);
                // also store internally
                mSceneEntities.push_back(ent);
        }

        cout << "loaded " << entityCount << " scene entities" << endl;
}


bool ResourceManager::Load(const std::string &filename,
                                                   SceneEntityContainer &entities)
{
        igzstream istr(filename.c_str());
        
        if (!istr.is_open())
                return false;

        cout << "loading textures" << endl;
        
        // load the texture table
        LoadTextures(istr);

        cout << "loading shapes (geometry + materials)" << endl;

        // load the shapees
        LoadShapes(istr);

        cout << "loading scene entites" << endl;
        LoadSceneEntities(istr, entities);
        
        cout << "bin loading finished" << endl;

        // clean up
        mTextureTable.clear();
        mGeometryTable.clear();
        mMaterialTable.clear();

        return true;
}


void ResourceManager::AddSceneEntity(SceneEntity *ent)
{
        mSceneEntities.push_back(ent);
}


Transform3 *ResourceManager::CreateTransform(const Matrix4x4 &m)
{
        Transform3 *t = new Transform3(m);

        mTrafos.push_back(t);
        return t;
}



Material *ResourceManager::CreateMaterial()
{
        Material *mat = new Material();
        mMaterials.push_back(mat);

        return mat;
}

}