ASEModelFactory.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <3dsparse/ASEModelFactory.h>
#include <common/Defines.h>
#include <stdio.h>
#include <math.h>

extern FILE *asein;
extern int aseparse(void);
extern int aselineno;

static ASEModelFactory *factory_ = 0;
static Model *model_ = 0;

ASEModelFactory::ASEModelFactory()
{
}

ASEModelFactory::~ASEModelFactory()
{
}

Model *ASEModelFactory::createModel(const char *fileName,
        const char *texName)
{
        model_ = new Model();
        if (loadFile(fileName))
        {
                model_->setup();
                calculateTexCoords(texName);
        }
        else
        {
                delete model_;
                model_ = 0;
        }

        return model_;
}

bool ASEModelFactory::loadFile(const char *fileName)
{
        asein = fopen(fileName, "r");
        if (!asein)
        {
                return false;
        }

        // Reset variables for next parser
        factory_ = this;
        aselineno = 0;
        return (aseparse() == 0);
}

ASEModelFactory *ASEModelFactory::getCurrent()
{
        return factory_;
}

void ASEModelFactory::addMesh(char *meshName)
{
        Mesh *mesh = new Mesh(meshName);
        model_->addMesh(mesh);
}

Mesh *ASEModelFactory::getCurrentMesh()
{
        DIALOG_ASSERT(!model_->getMeshes().empty());
        Mesh *mesh = model_->getMeshes().back();
        return mesh;
}

Vector ASEModelFactory::getTexCoord(Vector &tri, MaxMag mag, Vector &max, Vector &min)
{
        Vector newTri = tri;
        newTri -= min;
        newTri /= (max - min);

        switch(mag)
        {
        case MagX:
                newTri /= 2.0f;
                newTri[0] = newTri[1] * 2.0f;
                newTri[1] = newTri[2];
                break;
        case MagY:
                newTri /= 2.0f;
                newTri[0] = newTri[0];
                newTri[1] = newTri[2] + 0.5f;
                break;
        case MagZ:
                newTri /= 2.0f;
                newTri[0] += 0.5f;
                newTri[1] += 0.5f;
                break;
        }

        return newTri;
}

void ASEModelFactory::calculateTexCoords(const char *texName)
{
        std::vector<Mesh *>::iterator itor;
        for (itor = model_->getMeshes().begin();
                itor != model_->getMeshes().end();
                itor++)
        {
                Mesh *mesh = *itor;
                mesh->setTextureName(texName);

                std::vector<Face*>::iterator fitor;
                for (fitor = mesh->getFaces().begin();
                        fitor != mesh->getFaces().end();
                        fitor++)
                {
                        Face &face = *(*fitor);

                        Vector &triA = mesh->getVertex(face.v[0])->position;
                        Vector &triB = mesh->getVertex(face.v[1])->position;
                        Vector &triC = mesh->getVertex(face.v[2])->position;

                        MaxMag maxMag = MagZ;
                        Vector faceNormal = (face.normal[0] + face.normal[1] + face.normal[2]).Normalize();
                        if (fabs(faceNormal[0]) >= fabs(faceNormal[1]) &&
                                fabs(faceNormal[0]) >= fabs(faceNormal[2]))
                        {
                                maxMag = MagX;
                        }
                        else if (fabs(faceNormal[1]) >= fabs(faceNormal[0]) &&
                                fabs(faceNormal[1]) >= fabs(faceNormal[2]))
                        {
                                maxMag = MagY;
                        }

                        face.tcoord[0] = getTexCoord(triA, maxMag, model_->getMax(), model_->getMin());
                        face.tcoord[1] = getTexCoord(triB, maxMag, model_->getMax(), model_->getMin());
                        face.tcoord[2] = getTexCoord(triC, maxMag, model_->getMax(), model_->getMin());
                }
        }
}

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