source: orxonox.OLD/branches/bsp_model/src/lib/graphics/importer/bsp_manager.cc @ 7353

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

   Copyright (C) 2006 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: bottac@ee.ethz.ch
*/


#include "vector.h"
#include "bsp_file.h"
#include "bsp_manager.h"
#include "bsp_tree_node.h"
#include "p_node.h"
#include "state.h"
#include "debug.h"
#include "material.h"
#include "camera.h"

#include "vertex_array_model.h"








BspManager::BspManager()
{
        // open a BSP file
        this->bspFile = new BspFile();
        this->bspFile->read("Kanti175.bsp");
        this->bspFile->build_tree();
        this->root  = this->bspFile->get_root();
        this->alreadyVisible = new bool [this->bspFile->numFaces];
}

void BspManager::draw()
{
        




 // Draw Debug Terrain
/*
this->bspFile->Materials[0]->select(); 
for(int i = 0; i <  this->bspFile->numPatches ; i++)
        {
                this->bspFile->VertexArrayModels[i]->draw();

        }
*/



   // erase alreadyVisible
   for(int i = 0; i < this->bspFile->numFaces; i++) this->alreadyVisible[i] = false;
 float tmp = 0;
  // Find all visible faces...

  this->cam = State::getCamera()->getAbsCoor() ; 
 this->ship = State::getCameraTargetNode()->getAbsCoor();




   this->cam = State::getCameraTargetNode()->getAbsCoor();
   this->viewDir=    State::getCameraTarget()->getAbsCoor() -  State::getCamera()->getAbsCoor() ;
   float d = (cam.x*viewDir.x + cam.y*viewDir.y + cam.z * viewDir.z);

   BspTreeNode*  ActLeaf = this->getLeaf(this->bspFile->root, &ship);
   int viscluster = -1;
        viscluster =((leaf*)(this->bspFile->leaves))[ ActLeaf->leafIndex].cluster; // get the players cluster (viscluster)


 
   // Test Collision Detection
        this->checkCollision(this->root, &this->cam);

    if (true)//(((int *)(this->bspFile->header))[35] == 0)  || viscluster < 0)  // if (sizeof(Visdata) == 0)
    {
        // Do Frustum culling and draw 'em all
        
        // Iterate through all Leafs
        for(int i = 0; i <  this->bspFile->numLeafs   ; i++ )   
        {
                // cluster =  ((leaf *)(this->bspFile->leaves))[i].cluster;
                leaf& curLeaf = ((leaf *)(this->bspFile->leaves))[i];
        
                
                // Iterate through all faces
                for (int j = 0; j < curLeaf.n_leaffaces ; ++j)
                {
                         const int f = ( j +  ((leaf *) (this->bspFile->leaves))[i].leafface) % this->bspFile->numFaces;
                        if (f >=0 && !this->isAlreadyVisible(f)) 
                        {
                                this->alreadyVisible[f] = true;
                        /*      if(ActLeaf->leafIndex == i)
                                {
                                        this->alreadyVisible[i] = false;
                                        this->draw_debug_face(f);
                                        this->alreadyVisible[i] = true;
                                }
                                else */draw_face(f); // "visibleFaces.append(f)"
                        }
                }
                                 
        

         
        } //for
    }
    else
   {
         int cluster;
        int seven = 7;
        unsigned char  one = 1;
        unsigned int v;
        unsigned char  visSet;
        
        // Iterate through all Leafs
        
        for(int i = 0; i <  this->bspFile->numLeafs   ; ++i )   
        {
                leaf& camLeaf =  ((leaf *)(this->bspFile->leaves))[ActLeaf->leafIndex] ;
                leaf& curLeaf = ((leaf *)(this->bspFile->leaves))[i] ;
                cluster =  curLeaf.cluster;
                if(cluster <0) continue;
                v = ((viscluster *  ( ((int *)this->bspFile->visData)[1]) ) + (cluster / 8));
                visSet =((unsigned char*) (this->bspFile->visData))[v+8];
                //   PRINTF(0)("BSP Manager: visibility ");             


        if( ((visSet) & ((unsigned char)1 <<(unsigned char) (cluster &  7))) == 0 ) // < 20 || ((visSet) & ((unsigned char)1 <<(unsigned char) (cluster &  7)))  >= 128)
        {
                // Iterate through all faces
                for (int j = 0; j < curLeaf.n_leaffaces ; ++j)
                {
                         const int f = (j +  curLeaf.leafface) % this->bspFile->numFaces;
                

                        if (!this->isAlreadyVisible(f) && f>=0) 
                        {
                                        this->draw_face(f);
                                        this->alreadyVisible[f] = true;
                        }
                        
                }
        
        }// if 
        
        }//for

    }//else


}//draw

void BspManager::draw_leaf()
{

}

void BspManager::draw_face(int curface)
{
 face& curFace =  ((face *)(this->bspFile->faces))[curface];
 const BspVertex* curVertex = (BspVertex *) this->bspFile->vertice;
 int stride = 44;  // sizeof(Vertex)
 int offset    = curFace.vertex;
        
  // PRINTF(0)("BSP Manager: ");
  // PRINTF(0)("BSP Manager: type: %i  \n", curFace.texture);
   
 //  if(  curFace.texture < 0 ) return;
   if(curFace.type == 2) 
        {
        this->draw_patch( &curFace);
        return;
        }
 if(curFace.type == 3) return;
   // if(this->bspFile->Materials[curFace.texture] != NULL)     
        if(this->lastTex != curFace.texture)
        {
        this->bspFile->Materials[curFace.texture]->select();
        this->lastTex = curFace.texture;
        }
  glEnableClientState(GL_VERTEX_ARRAY );
  glEnableClientState(GL_TEXTURE_COORD_ARRAY );
  glEnableClientState(GL_NORMAL_ARRAY );
//  glEnableClientState(GL_COLOR_ARRAY);        
  // glEnableClientState(GL_VERTEX_ARRAY );
        
  glVertexPointer(3, GL_FLOAT, stride, &(curVertex[offset].position[0]));
   // glClientActiveTextureARB(GL_TEXTURE0_ARB);
  glTexCoordPointer(2, GL_FLOAT, stride, &(curVertex[offset].texcoord[0]));
   // glClientActiveTextureARB(GL_TEXTURE1_ARB);
   // glTexCoordPointer(2, GL_FLOAT, stride, &(curVertex[offset].texcoord[1]));
   //glEnableClientState(GL_NORMAL_ARRAY );

  glNormalPointer( GL_FLOAT, stride, &(curVertex[offset].normal[0]));
    // glColorPointer(4, GL_BYTE, stride, &(curVertex[offset].color[0]));
  glDrawElements(GL_TRIANGLES, curFace.n_meshverts,
                             GL_UNSIGNED_INT, &(((meshvert *)this->bspFile->meshverts) [curFace.meshvert]));


  glDisableClientState(GL_VERTEX_ARRAY );
  glDisableClientState(GL_TEXTURE_COORD_ARRAY );
  glDisableClientState(GL_NORMAL_ARRAY );
// glDisableClientState(GL_COLOR_ARRAY);
        
}


void BspManager::draw_debug_face(int curface)
{
 face& curFace =  ((face *)(this->bspFile->faces))[curface];
 const BspVertex* curVertex = (BspVertex *) this->bspFile->vertice;
 int stride = 44;  // sizeof(Vertex)
 int offset    = curFace.vertex;
        
  // PRINTF(0)("BSP Manager: ");
  // PRINTF(0)("BSP Manager: type: %i  \n", curFace.texture);
   
 //  if(  curFace.texture < 0 ) return;
   if(curFace.type == 2) 
        {
        this->draw_patch( &curFace);
        return;
        }
 if(curFace.type == 3) return;
   // if(this->bspFile->Materials[curFace.texture] != NULL)     

        this->bspFile->Materials[2]->select();
        this->lastTex = 2;

  glEnableClientState(GL_VERTEX_ARRAY );
  glEnableClientState(GL_TEXTURE_COORD_ARRAY );
  glEnableClientState(GL_NORMAL_ARRAY );
  //glEnableClientState(GL_COLOR_ARRAY);        
  // glEnableClientState(GL_VERTEX_ARRAY );
        
  glVertexPointer(3, GL_FLOAT, stride, &(curVertex[offset].position[0]));
   // glClientActiveTextureARB(GL_TEXTURE0_ARB);
  glTexCoordPointer(2, GL_FLOAT, stride, &(curVertex[offset].texcoord[0]));
   // glClientActiveTextureARB(GL_TEXTURE1_ARB);
   // glTexCoordPointer(2, GL_FLOAT, stride, &(curVertex[offset].texcoord[1]));
   //glEnableClientState(GL_NORMAL_ARRAY );

  glNormalPointer( GL_FLOAT, stride, &(curVertex[offset].normal[0]));
   //  glColorPointer(4, GL_BYTE, stride, &(curVertex[offset].color[0]));
  glDrawElements(GL_TRIANGLES, curFace.n_meshverts,
                             GL_UNSIGNED_INT, &(((meshvert *)this->bspFile->meshverts) [curFace.meshvert]));
        
}

void BspManager::draw_patch(face* Face)
{
                if(this->lastTex != Face->texture)
                {
                this->bspFile->Materials[Face->texture]->select();
                this->lastTex = Face->texture;
                }

        for(int i = 0; i < Face->n_meshverts  ; i++)
        {
           //glFrontFace(GL_CW);        
           //PRINTF(0)("BSP Manager: Face->size[0]: %i . \n", Face->size[0]);   
           glEnableClientState(GL_VERTEX_ARRAY );
           glEnableClientState(GL_TEXTURE_COORD_ARRAY );
           glEnableClientState(GL_NORMAL_ARRAY );

           glVertexPointer(3, GL_FLOAT,44, &((((BspVertex*)(this->bspFile->patchVertice))[8*8*(Face->meshvert+i)]).position[0]));
           glTexCoordPointer(2, GL_FLOAT, 44, &((((BspVertex*)(this->bspFile->patchVertice))[8*8*(Face->meshvert+i)]).texcoord[0][0]));
           glNormalPointer( GL_FLOAT, 44,&((((BspVertex*)(this->bspFile->patchVertice))[8*8*(Face->meshvert+i)]).normal[0]) );

           // We'll need multitexture suport for lightning
           //glClientActiveTextureARB(GL_TEXTURE0_ARB);
           //glTexCoordPointer(2, GL_FLOAT,0, &vertex[0].textureCoord);
          //glClientActiveTextureARB(GL_TEXTURE1_ARB);
          //glTexCoordPointer(2, GL_FLOAT, sizeof(BSPVertex), &vertex[0].lightmapCoord);


                for(int row=0; row<7; ++row)
                {
                        glDrawElements(GL_TRIANGLE_STRIP, 2*(8), GL_UNSIGNED_INT,
                                                        & (     (((GLuint*)  (this->bspFile->patchIndexes))[7*8*2*(Face->meshvert+i)+ row*2*8]  ))  );
                }

                //glFrontFace(GL_CCW);
        }
                
}

bool BspManager::isAlreadyVisible(int Face)
{
        return this->alreadyVisible[Face];
}


BspTreeNode*  BspManager::getLeaf(BspTreeNode* node, Vector* cam)
{
        float dist = 0;
        while(!(node->isLeaf))
        {
                dist = (node->plane.x * this->cam.x + node->plane.y*this->cam.y + node->plane.z*this->cam.z) - node->d;
                if(dist >= 0.0f)
                {
                 node = node->left;
                }
                else
                {
                node = node->right;
                
                }
        }
        return  node;
}

void  BspManager::checkCollision(BspTreeNode* node, Vector* cam)
{
        float dist = 0;
        if(!(node->isLeaf))
        {
                dist = (node->plane.x * this->cam.x + node->plane.y*this->cam.y + node->plane.z*this->cam.z) - node->d;
                if(dist > 1.0f)
                {
                 checkCollision(node->left,cam);
                 return;
                }
                if(dist < -1.0f)
                {
                 checkCollision(node->right,cam);
                 return;
                }
                if(dist<=1.0f && dist >= -1.0f)
                        {
                        checkCollision(node->left,cam);
                        checkCollision(node->right,cam);
                        return;
                        }
                return;
        }
        else
        {
        
        leaf& camLeaf =  ((leaf *)(this->bspFile->leaves))[(node->leafIndex ) ];

        if (camLeaf.cluster < 0) {this->drawDebugCube(&this->cam);}

        

        for(int i = 0; i < camLeaf.n_leafbrushes && i < 10; i++ )
        {
                brush& curBrush = ((brush*)(this->bspFile->brushes))[(camLeaf.leafbrush_first +i)%this->bspFile->numLeafBrushes];
                if(curBrush.n_brushsides < 0) return;
                for(int j = 0; j < curBrush.n_brushsides; j++)
                {
                float dist = -0.1;
                brushside& curBrushSide = ((brushside*)(this->bspFile->brushSides))[(curBrush.brushside +j)%this->bspFile->numBrushSides];
                plane&      testPlane = ((plane*)(this->bspFile->planes))[curBrushSide.plane % this->bspFile->numPlanes];
                dist = testPlane.x * this->cam.x +  testPlane.y * this->cam.y  +  testPlane.z * this->cam.z   -testPlane.d ; 
                
                if(dist < -0.01f) dist = -1.0f *dist;
                if(dist < 1.0f){
                                this->drawDebugCube(&this->cam);
                                return;
                              }
                }
                        
        }
        
        }
        return;
}

void BspManager::drawDebugCube(Vector* cam)
{
        glBegin(GL_QUADS); 

   // Bottom Face.  Red, 75% opaque, magnified texture
 
   glNormal3f( 0.0f, -1.0f, 0.0f); // Needed for lighting
   glColor4f(0.9,0.2,0.2,.75); // Basic polygon color

   glTexCoord2f(0.800f, 0.800f); glVertex3f(cam->x-1.0f, cam->y-1.0f,cam->z -1.0f); 
   glTexCoord2f(0.200f, 0.800f); glVertex3f(cam->x+1.0f, cam->y-1.0f,cam->z -1.0f);
   glTexCoord2f(0.200f, 0.200f); glVertex3f(cam->x+ 1.0f,cam->y -1.0f,cam->z +  1.0f);
   glTexCoord2f(0.800f, 0.200f); glVertex3f(cam->x-1.0f, cam->y-1.0f, cam->z + 1.0f);


   // Top face; offset.  White, 50% opaque.
 
   glNormal3f( 0.0f, 1.0f, 0.0f);  glColor4f(0.5,0.5,0.5,.5);

   glTexCoord2f(0.005f, 1.995f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f, cam->z -1.0f);
   glTexCoord2f(0.005f, 0.005f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f,  cam->z +1.0f);
   glTexCoord2f(1.995f, 0.005f); glVertex3f(cam->x+ 1.0f,  cam->y+1.0f,  cam->z +1.0f);
   glTexCoord2f(1.995f, 1.995f); glVertex3f(cam->x+ 1.0f, cam->y+ 1.0f, cam->z -1.0f);


   // Far face.  Green, 50% opaque, non-uniform texture cooridinates.

   glNormal3f( 0.0f, 0.0f,-1.0f);  glColor4f(0.2,0.9,0.2,.5); 

   glTexCoord2f(0.995f, 0.005f); glVertex3f(cam->x-1.0f, cam->y-1.0f, cam->z -1.3f);
   glTexCoord2f(2.995f, 2.995f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f, cam->z -1.3f);
   glTexCoord2f(0.005f, 0.995f); glVertex3f(cam->x+ 1.0f,cam->y+  1.0f, cam->z -1.3f);
   glTexCoord2f(0.005f, 0.005f); glVertex3f( cam->x+1.0f,cam->y -1.0f, cam->z -1.3f);


   // Right face.  Blue; 25% opaque
   
   glNormal3f( 1.0f, 0.0f, 0.0f);  glColor4f(0.2,0.2,0.9,.25);

   glTexCoord2f(0.995f, 0.005f); glVertex3f(cam->x+ 1.0f,cam->y -1.0f, cam->z -1.0f); 
   glTexCoord2f(0.995f, 0.995f); glVertex3f(cam->x+ 1.0f, cam->y+ 1.0f, cam->z -1.0f);
   glTexCoord2f(0.005f, 0.995f); glVertex3f(cam->x+ 1.0f, cam->y+ 1.0f, cam->z + 1.0f);
   glTexCoord2f(0.005f, 0.005f); glVertex3f(cam->x+ 1.0f, cam->y-1.0f,  cam->z +1.0f);


   // Front face; offset.  Multi-colored, 50% opaque.

   glNormal3f( 0.0f, 0.0f, 1.0f); 

   glColor4f( 0.9f, 0.2f, 0.2f, 0.5f);
   glTexCoord2f( 0.005f, 0.005f); glVertex3f(cam->x-1.0f, cam->y-1.0f,  cam->z +1.0f);
   glColor4f( 0.2f, 0.9f, 0.2f, 0.5f);
   glTexCoord2f( 0.995f, 0.005f); glVertex3f(cam->x+ 1.0f, cam->y-1.0f,  cam->z +1.0f);
   glColor4f( 0.2f, 0.2f, 0.9f, 0.5f);
   glTexCoord2f( 0.995f, 0.995f); glVertex3f( cam->x+1.0f,  cam->y+1.0f,  cam->z +1.0f); 
   glColor4f( 0.1f, 0.1f, 0.1f, 0.5f);
   glTexCoord2f( 0.005f, 0.995f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f,  cam->z +1.0f);


   // Left Face; offset.  Yellow, varying levels of opaque.
   
   glNormal3f(-1.0f, 0.0f, 0.0f);  
   
   glColor4f(0.9,0.9,0.2,0.0);
   glTexCoord2f(0.005f, 0.005f); glVertex3f(cam->x-1.0f, cam->y-1.0f, cam->z -1.0f); 
   glColor4f(0.9,0.9,0.2,0.66);
   glTexCoord2f(0.995f, 0.005f); glVertex3f(cam->x-1.0f,cam->y -1.0f,  cam->z +1.0f);
   glColor4f(0.9,0.9,0.2,1.0);
   glTexCoord2f(0.995f, 0.995f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f,  cam->z +1.0f);
   glColor4f(0.9,0.9,0.2,0.33);
   glTexCoord2f(0.005f, 0.995f); glVertex3f(cam->x-1.0f, cam->y+ 1.0f, cam->z -1.0f);



                glEnd();
}