source: orxonox.OLD/branches/water/src/world_entities/environments/mapped_water.cc @ 7780

/*
   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: Stefan Lienard
   co-programmer: ...
*/

#include "mapped_water.h"
#include "util/loading/load_param.h"
#include "util/loading/factory.h"




CREATE_FACTORY(MappedWater, CL_MAPPED_WATER);


MappedWater::MappedWater(const TiXmlElement* root)
 : texture(GL_TEXTURE_2D)
{
  this->setClassID(CL_MAPPED_WATER, "MappedWater");
  this->toList(OM_ENVIRON);

  if (root != NULL)
    this->loadParams(root);

  //! HACK FIXME HACK FIXME HACK FIXME HACK FIXME
  //! todo: rename texture to reflection texture
  // set up refleciton texture
  //mat.setDiffuseMap(&this->texture, 0);
  mat.setDiffuseMap("pictures/dudvmap.bmp", GL_TEXTURE_2D, 0);
  mat.setDiffuseMap("pictures/sky-replace.jpg", GL_TEXTURE_2D, 1);
  mat.setDiffuseMap("pictures/sky-replace.jpg", GL_TEXTURE_2D, 2);
  mat.setDiffuseMap("pictures/sky-replace.jpg", GL_TEXTURE_2D, 3);
  mat.setDiffuseMap("pictures/sky-replace.jpg", GL_TEXTURE_2D, 4);
  // load refraction texture
  //mat.setDiffuseMap(&this->refractionTexture, 1);
  // load normal map
  //mat.setDiffuseMap("pictures/normalmap.bmp", GL_TEXTURE_2D, 2);
  // load dudv map
  //mat.setDiffuseMap("pictures/dudvmap.bmp", GL_TEXTURE_2D, 3);
  // set up depth texture
  //mat.setDiffuseMap(&this->depthTexture, 4);
  
  // set the size of the refraction and reflection textures
  this->textureSize = 512;

  shader = new Shader("/home/lieni/orxonox/data/trunk/shaders/water.vert", "/home/lieni/orxonox/data/trunk/shaders/mapped_water.frag");
}

MappedWater::~MappedWater()
{
  delete shader;
}

void MappedWater::loadParams(const TiXmlElement* root)
{
  WorldEntity::loadParams(root);

  LoadParam(root, "waterHeight", this, MappedWater, setHeight);
}


void MappedWater::draw() const
{
  glPushMatrix();
  glTranslatef(0,this->waterHeight,0);

  //glEnable(GL_LIGHTING);


  //mat.setDiffuseMap("pictures/sky-replace.jpg", GL_TEXTURE_2D, 1);
  //mat.setTransparency(1.0);
  //mat.setDiffuse(1.0, 0, .1);


  // HACK

  //glDisable(GL_BLEND);
  //glActiveTexture(GL_TEXTURE0);
  //glBindTexture(GL_TEXTURE_2D, this->texture);

  mat.select();
  // Shader init
  this->shader->activateShader();
  GLint uniform;
  
  // Set the variable "reflection" to correspond to the first texture unit
  uniform = glGetUniformLocationARB(shader->getProgram(), "reflection"); 
  glUniform1iARB(uniform, 0); //second paramter is the texture unit

  // Set the variable "refraction" to correspond to the second texture unit
  //uniform = glGetUniformLocationARB(shader->getProgram(), "refraction");
  //glUniform1iARB(uniform, 0);
  // FIXME glUniform1iARB(uniform, 1);

  // Set the variable "normalMap" to correspond to the third texture unit
  //uniform = glGetUniformLocationARB(shader->getProgram(), "normalMap");
  //glUniform1iARB(uniform, 2);

  // Set the variable "dudvMap" to correspond to the fourth texture unit
  uniform = glGetUniformLocationARB(shader->getProgram(), "dudvMap"); 
  glUniform1iARB(uniform, 3);

  // Set the variable "depthMap" to correspond to the fifth texture unit
  //uniform = glGetUniformLocationARB(shader->getProgram(), "depthMap");
  //glUniform1iARB(uniform, 4); 
  // FIXME we dont have a depthMap yet :-(

  // Give the variable "waterColor" a blue color
  uniform = glGetUniformLocationARB(shader->getProgram(), "waterColor");
  glUniform4fARB(uniform, 0.1f, 0.2f, 0.4f, 1.0f); 

  // FIXME set camera and light information
  Vector lightPos(100.0f, 150.0f, 100.0f);

  // Store the camera position in a variable
  //CVector3 vPosition = g_Camera.Position();
  Vector vPosition(50.0f, 50.0f, 50.0f);

  // Give the variable "lightPos" our hard coded light position
  uniform = glGetUniformLocationARB(shader->getProgram(), "lightPos");
  glUniform4fARB(uniform, lightPos.x, lightPos.y, lightPos.z, 1.0f); 

  // Give the variable "cameraPos" our camera position
  uniform = glGetUniformLocationARB(shader->getProgram(), "cameraPos");
  glUniform4fARB(uniform, vPosition.x, vPosition.y, vPosition.z, 1.0f); 

  glBegin(GL_QUADS);
    glNormal3f(0,1,0);
    glMultiTexCoord2f(GL_TEXTURE0, 0,0);
    glMultiTexCoord2f(GL_TEXTURE1, 0,0);
    glMultiTexCoord2f(GL_TEXTURE2, 0,0);
    glMultiTexCoord2f(GL_TEXTURE3, 0,0);
    glMultiTexCoord2f(GL_TEXTURE4, 0,0);
    glVertex3f(0,0,0);

    glMultiTexCoord2f(GL_TEXTURE0, 1,0);
    glMultiTexCoord2f(GL_TEXTURE1, 1,0);
    glMultiTexCoord2f(GL_TEXTURE2, 1,0);
    glMultiTexCoord2f(GL_TEXTURE3, 1,0);
    glMultiTexCoord2f(GL_TEXTURE4, 1,0);
    glVertex3f(100,0,0);

    glMultiTexCoord2f(GL_TEXTURE0, 1,1);
    glMultiTexCoord2f(GL_TEXTURE1, 1,1);
    glMultiTexCoord2f(GL_TEXTURE2, 1,1);
    glMultiTexCoord2f(GL_TEXTURE3, 1,1);
    glMultiTexCoord2f(GL_TEXTURE4, 1,1);
    glVertex3f(100,0,-100);

    glMultiTexCoord2f(GL_TEXTURE0, 0,1);
    glMultiTexCoord2f(GL_TEXTURE1, 0,1);
    glMultiTexCoord2f(GL_TEXTURE2, 0,1);
    glMultiTexCoord2f(GL_TEXTURE3, 0,1);
    glMultiTexCoord2f(GL_TEXTURE4, 0,1);
    glVertex3f(0,0,-100);
  glEnd();
  this->shader->deactivateShader();

  glPopMatrix();
}

void MappedWater::tick(float dt)
{

}

void MappedWater::setHeight(float height)
{
  this->waterHeight = height;
}

void MappedWater::activateReflection()
{
  glPushAttrib(GL_VIEWPORT_BIT);
//   glPushMatrix();

  //glLoadIdentity();
  glViewport(0,0, textureSize, textureSize);


  // Clear the color and depth bits, reset the matrix and position our camera.

  //g_Camera.Look();


  // If our camera is above the water we will render the scene flipped upside down.
  // In order to line up the reflection nicely with the world we have to translate
  // the world to the position of our reflected surface, multiplied by two.
  //if(g_Camera.Position().y > waterHeight)
  //{
      // Translate the world, then flip it upside down
   //   glTranslatef(0.0f, waterHeight*2.0f, 0.0f);
    //  glScalef(1.0, -1.0, 1.0);

      // Since the world is updside down we need to change the culling to FRONT
      //glCullFace(GL_FRONT);

      // Set our plane equation and turn clipping on
     // double plane[4] = {0.0, 1.0, 0.0, -waterHeight};
   //   glEnable(GL_CLIP_PLANE0);
     // glClipPlane(GL_CLIP_PLANE0, plane);

      // Render the world upside down and clipped (only render the top flipped).
      // If we don't turn OFF caustics for the reflection texture we get horrible
      // artifacts in the water.  That is why we set bRenderCaustics to FALSE.
      //RenderWorld(false);

      // Turn clipping off
     // glDisable(GL_CLIP_PLANE0);

      // Restore back-face culling
    //  glCullFace(GL_BACK);
  //}
  /*else
  {
      // If the camera is below the water we don't want to flip the world,
      // but just render it clipped so only the top is drawn.
      double plane[4] = {0.0, 1.0, 0.0, waterHeight};
      glEnable(GL_CLIP_PLANE0);
      glClipPlane(GL_CLIP_PLANE0, plane);
      RenderWorld(true);
      glDisable(GL_CLIP_PLANE0);
  }*/
}


void MappedWater::deactivateReflection()
{
  //glBindTexture(GL_TEXTURE_2D, texture.getTexture()); is done by mat.select();

  //mat.setDiffuseMap(&texture, 0);
  
  //mat.select();
  //glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, textureSize, textureSize);


  glPopAttrib();
//   glPopMatrix();
}

void MappedWater::activateRefraction()
{

}

void MappedWater::deactivateRefraction()
{

}