source: orxonox.OLD/branches/bsp_model/src/lib/graphics/importer/md3/md3_model.cc @ 8560

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   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, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Patrick Boenzli
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_IMPORTER

#include "md3_model.h"

#include "md3_data.h"
#include "md3_mesh.h"
#include "md3_tag.h"
#include "md3_bone_frame.h"

#include "md3_animation_cfg.h"

#include "material.h"
#include "quaternion.h"

namespace md3
{

  /**
   * md3 model
   */
  MD3Model::MD3Model(std::string filename, float scaling)
  {
    this->md3Data = new MD3Data(filename, filename, scaling);

    MD3AnimationCfg cfg("/home/boenzlip/tmp/q3/Downloads/MOH/q3mdl-alien3/models/players/alien3/animation.cfg");

    this->tmpBoneFrame = new MD3BoneFrame();
    this->tmpMesh = new sVec3D[2048];          //!< the temporary mesh, hopefully newer bigger than 2048 vertices
    this->tmpNormal = new MD3Normal[2048];     //!< the temporary normals
  }



  MD3Model::~MD3Model()
  {
    delete this->tmpBoneFrame;
    delete [] this->tmpMesh;
  }



  /**
   * this draws the md3 model
   */
  void MD3Model::draw()
  {
    //draw current bone frame
    this->draw(this->md3Data);
  }


  /**
   * draw the md3model
   * @param data: the data to be drawn
   */
  void MD3Model::draw(MD3Data* data)
  {

    // draw the bones if needed
    if( this->bDrawBones)
    {
      // get bone frame, interpolate if necessary
      if( data->animationState.interpolationFraction != 0.0 &&
          data->animationState.currentFrame != data->animationState.nextFrame) {
        //interpolate bone frame
        this->drawBoneFrame(this->interpolateBoneFrame(data->boneFrames[data->animationState.currentFrame],
                            data->boneFrames[data->animationState.nextFrame],
                            data->animationState.interpolationFraction));
      }
      else {
        //stick with current bone frame
        this->drawBoneFrame(data->boneFrames[data->animationState.currentFrame]);
      }
    }


    //draw all meshes of current frame of this model
    for( int i = 0;  i < data->meshNum; i++)
    {
      MD3Mesh* mesh = data->meshes[i];

//       gl.glBlendFunc(mesh.GLSrcBlendFunc, mesh.GLDstBlendFunc);
//       gl.glDepthMask(mesh.GLDepthMask);

      if( mesh->header->textureNum > 0 && &mesh->material[0] != NULL)
        mesh->material[0].select();

      // get mesh frame, do interpolation if necessary
      sVec3D* frame;
      if( data->animationState.interpolationFraction != 0.0 &&
          data->animationState.currentFrame != data->animationState.nextFrame) {
        //interpolate mesh frame between the 2 current mesh frames
//         frame = this->interpolateMeshFrame(mesh, data->animationState.currentFrame, data->animationState.nextFrame,
//                                            data->animationState.interpolationFraction);
        frame = this->interpolateMeshFrame( data->meshes[data->animationState.currentFrame]->meshFrames,
                                            data->meshes[data->animationState.nextFrame]->meshFrames,
                                            data->animationState.interpolationFraction, mesh);
      }
      else {
        //no interpolation needed, just draw current frame
        frame = &mesh->meshFrames[data->animationState.currentFrame];
      }

      this->drawMesh(mesh, frame);


      // draw vertex normals if needed
      if( this->bDrawNormals) {
        // get vertex normals, interpolate if necessary
        if( data->animationState.interpolationFraction != 0.0 &&
            data->animationState.currentFrame != data->animationState.nextFrame) {
          //interpolate vertex normals
          this->drawVertexNormals(frame, this->interpolateVertexNormals(&mesh->normals[data->animationState.currentFrame],
                                  &mesh->normals[data->animationState.nextFrame], data->animationState.interpolationFraction, mesh));
        }
        else {
          //stick with current vertex normals
          this->drawVertexNormals(frame, &mesh->normals[data->animationState.currentFrame]);
        }
      }
    }


    // draw all models linked to this model
    std::map<int, MD3Data*>::iterator it = data->sortedMap.begin();
    while( it != data->sortedMap.end())
    {
      MD3Data* child = it->second;

      //build transformation array m from matrix, interpolate if necessary
      float* m = new float[16];

      MD3Tag* currFrameTag = data->boneFrames[data->animationState.currentFrame]->tags[child->parentTagIndex];

      if( data->animationState.interpolationFraction != 0.0 &&
          data->animationState.currentFrame != data->animationState.nextFrame) {
        //we need to interpolate
        MD3Tag* nextFrameTag = data->boneFrames[data->animationState.nextFrame]->tags[child->parentTagIndex];
        m = this->interpolateTransformation(currFrameTag, nextFrameTag, data->animationState.interpolationFraction);
      }
      else {
        //no interpolation needed, stay with last transformation
        //OpenGL matrix is in column-major order
        m[0] = currFrameTag->matrix[0][0];
        m[1] = currFrameTag->matrix[1][0];
        m[2] = currFrameTag->matrix[2][0];
        m[3] = 0.0f;
        m[4] = currFrameTag->matrix[0][1];
        m[5] = currFrameTag->matrix[1][1];
        m[6] = currFrameTag->matrix[2][1];
        m[7] = 0.0f;
        m[8] = currFrameTag->matrix[0][2];
        m[9] = currFrameTag->matrix[1][2];
        m[10]= currFrameTag->matrix[2][2];
        m[11]= 0.0f;
        m[12] = currFrameTag->position.x;
        m[13] = currFrameTag->position.y;
        m[14] = currFrameTag->position.z;
        m[15] = 1.0f;
      }

      //switch to child coord system
      glPushMatrix();
      glMultMatrixf(m);

      // and draw child
      this->draw(child);

      glPopMatrix();
    }
  }


  /**
   * draws the mesh
   */
  void MD3Model::drawMesh(MD3Mesh* mesh, sVec3D* frame)
  {}


  /**
   *  drawo vertex normals
   */
  void MD3Model::drawVertexNormals(sVec3D* frame, MD3Normal* normals)
  {}


  /**
   * draw bone frame
   */
  void MD3Model::drawBoneFrame(MD3BoneFrame* frame)
  {}


  /**
   *  interpolate bone frame
   * @param currBoneFrame Start bone frame.
   * @param nextBoneFrame End bone frame.
   * @param frac Interpolation fraction, in [0,1].
   */
  MD3BoneFrame* MD3Model::interpolateBoneFrame(MD3BoneFrame* currBoneFrame, MD3BoneFrame* nextBoneFrame, float frac)
  {
    this->tmpBoneFrame->mins.x      = (1.0f - frac) * currBoneFrame->mins.x       + frac * nextBoneFrame->mins.x;
    this->tmpBoneFrame->maxs.x      = (1.0f - frac) * currBoneFrame->maxs.x       + frac * nextBoneFrame->maxs.x;
    this->tmpBoneFrame->position.x  = (1.0f - frac) * currBoneFrame->position.x   + frac * nextBoneFrame->position.x;
    this->tmpBoneFrame->mins.y      = (1.0f - frac) * currBoneFrame->mins.y       + frac * nextBoneFrame->mins.y;
    this->tmpBoneFrame->maxs.y      = (1.0f - frac) * currBoneFrame->maxs.y       + frac * nextBoneFrame->maxs.y;
    this->tmpBoneFrame->position.y  = (1.0f - frac) * currBoneFrame->position.y   + frac * nextBoneFrame->position.y;
    this->tmpBoneFrame->mins.z      = (1.0f - frac) * currBoneFrame->mins.z       + frac * nextBoneFrame->mins.z;
    this->tmpBoneFrame->maxs.z      = (1.0f - frac) * currBoneFrame->maxs.z       + frac * nextBoneFrame->maxs.z;
    this->tmpBoneFrame->position.z  = (1.0f - frac) * currBoneFrame->position.z   + frac * nextBoneFrame->position.z;

    return this->tmpBoneFrame;
  }


  /**
   * interpolate mesh frame
   */
  sVec3D* MD3Model::interpolateMeshFrame(sVec3D* currMeshFrame, sVec3D* nextMeshFrame, float frac, MD3Mesh* mesh)
  {
    int vertexNum = mesh->header->vertexNum;

    // calc interpolated vertices
    for( int t = 0; t < vertexNum * 3.0f; t++)
    {
      this->tmpMesh[t][0]  = (1.0f - frac)   * currMeshFrame[t][0]  + frac * nextMeshFrame[t][0];
      this->tmpMesh[t][1]  = (1.0f - frac)   * currMeshFrame[t][1]  + frac * nextMeshFrame[t][1];
      this->tmpMesh[t][2]  = (1.0f - frac)   * currMeshFrame[t][2]  + frac * nextMeshFrame[t][2];
    }

    return this->tmpMesh;
  }


  /**
   * interpolate vertex normal
   */
  MD3Normal* MD3Model::interpolateVertexNormals(MD3Normal* currNormals, MD3Normal* nextNormals, float frac, MD3Mesh* mesh)
  {
    for( int i = 0; i < mesh->header->vertexNum; i++)
    {
      this->tmpNormal[i].vertexNormal[0] = (int)((1.0f - frac) * currNormals[i].vertexNormal[0] + frac * nextNormals[i].vertexNormal[0]);
      this->tmpNormal[i].vertexNormal[1] = (int)((1.0f - frac) * currNormals[i].vertexNormal[1] + frac * nextNormals[i].vertexNormal[1]);
    }

    return this->tmpNormal;
  }


  /**
   * interpolate transformation
   */
  float* MD3Model::interpolateTransformation(MD3Tag* currFrameTag, MD3Tag* nextFrameTag, float frac)
  {
    // interpolate position
    Vector interpolatedPosition = currFrameTag->position * (1.0f - frac) + nextFrameTag->position * frac;


    // interpolate rotation matrix
    float  currRot[4][4];
    float  nextRot[4][4];
    float  interpolatedMatrix[4][4];

    Quaternion currQuat(currFrameTag->matrix); currQuat.matrix(currRot);
    Quaternion nextQuat(nextFrameTag->matrix); nextQuat.matrix(nextRot);

    Quaternion interpolatedQuat = Quaternion::quatSlerp(currQuat, nextQuat, frac); interpolatedQuat.matrix(interpolatedMatrix);

    // quaternion code is column based, so use transposed matrix when spitting out to gl
    this->tmpMatrix[0] = interpolatedMatrix[0][0];
    this->tmpMatrix[4] = interpolatedMatrix[1][0];
    this->tmpMatrix[8] = interpolatedMatrix[2][0];
    this->tmpMatrix[12] = interpolatedPosition.x;
    this->tmpMatrix[1] = interpolatedMatrix[0][1];
    this->tmpMatrix[5] = interpolatedMatrix[1][1];
    this->tmpMatrix[9] = interpolatedMatrix[2][1];
    this->tmpMatrix[13] = interpolatedPosition.y;
    this->tmpMatrix[2] = interpolatedMatrix[0][2];
    this->tmpMatrix[6] = interpolatedMatrix[1][2];
    this->tmpMatrix[10]= interpolatedMatrix[2][2];
    this->tmpMatrix[14] = interpolatedPosition.z;
    this->tmpMatrix[3] = 0.0f;
    this->tmpMatrix[7] = 0.0f;
    this->tmpMatrix[11]= 0.0f;
    this->tmpMatrix[15] = 1.0f;

    return this->tmpMatrix;

  }


}