Distorted Android

///////////////////////////////////////////////////////////////////////////////////////////////////

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted 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.                                                           //

//                                                                                               //

// Distorted 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 Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

///////////////////////////////////////////////////////////////////////////////////////////////////

import java.util.ArrayList;

import java.util.HashMap;

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * The class takes special care to only render identical sub-trees once. Each Node holds a reference

 * to sub-class 'NodeData'. Two identical sub-trees attached at different points of the main tree

 * will point to the same NodeData; only the first of this is rendered (when mData.numRendered==0).

  private static long mNextNodeID =0;

  private class NodeData

    {

      numPointingNodes= 1;

    mNextNodeID = 0;

    mMapNodeID.clear();

    }

  private ArrayList<Long> generateIDList()

    {

    for(int i=0; i<mNumChildren[0]; i++)

      {

      node = mChildren.get(i);

      ret.add(node.mData.ID);

      }

    return ret;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////  

// this will be called on startup and every time OpenGL context has been lost

    {

    NodeData tmp;   

    for(ArrayList<Long> key: mMapNodeID.keySet())

      {

      tmp = mMapNodeID.get(key);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

// Debug - print all the Node IDs

    {

    String tmp="";

    int i;

    for(i=0; i<depth; i++) tmp +="   ";

    for(i=0; i<mNumChildren[0]; i++)

      mChildren.get(i).debug(depth+1);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

// Debug - print contents of the HashMap

  static void debugMap()

    {

    NodeData tmp;

    for(ArrayList<Long> key: mMapNodeID.keySet())

      {

      tmp = mMapNodeID.get(key);

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  void treeIsomorphism()

    {

    android.util.Log.e("NODE", "begin treeIso for Node Surface ID="+mSurface.getID());

    debug(0);

    debugMap();

    android.util.Log.e("NODE", "begin treeIso for Node Surface ID="+mSurface.getID());

    ArrayList<Long> oldList = generateIDList();

    for(int i=0; i<mNumChildren[0]; i++)

      {

      mChildren.get(i).treeIsomorphism();

      }

    ArrayList<Long> newList = generateIDList();

    NodeData newData = mMapNodeID.get(newList);

    if( newData==null )

      {

      android.util.Log.d("NODE", "  inserted newData to map, newList="+newList);

      newData = new NodeData(++mNextNodeID);

      mMapNodeID.put(newList,newData);

      debugMap();

      }

    else if( newData.ID != mData.ID )

      {

      newData.numPointingNodes++;

      }

    if( newData.ID != mData.ID )

      {

      boolean fboUsed = false;

      if( mNumChildren[0]>0 && newData.mFBO==null )

        {

        if( mData.mFBO!=null )

          {

          newData.mFBO = mData.mFBO;

          fboUsed = true;

          }

        else

          {

          newData.mFBO = new DistortedFramebuffer(mSurface.getWidth(),mSurface.getHeight());

          }

        }

      if( mNumChildren[0]==0 && newData.mFBO!=null )

        {

        newData.mFBO.markForDeletion();

        newData.mFBO = null;

        }

      if( --mData.numPointingNodes==0 )

        {

        android.util.Log.d("NODE", "  removed oldData to map, oldList="+oldList);

        debugMap();

        if( !fboUsed && mData.mFBO!=null )

          {

          mData.mFBO.markForDeletion();

          mData.mFBO = null;

          }

        }

      mData = newData;

    android.util.Log.e("NODE", "end treeIso for Node SurfaceID="+mSurface.getID()+" newList="+newList);

    debug(0);

    debugMap();

    android.util.Log.e("NODE", "end treeIso for Node SurfaceID="+mSurface.getID()+" newList="+newList);

    float halfY = mSurface.getHeight()/2.0f;

    if( mNumChildren[0]<=0 )

      {

    else

      {

      if( mData.numRendered==0 )

        {

        GLES30.glClear( GLES30.GL_DEPTH_BUFFER_BIT | GLES30.GL_COLOR_BUFFER_BIT);

        }

      mData.numRendered++;

      mData.numRendered %= mData.numPointingNodes;

// PUBLIC API

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

    mMesh          = mesh;

    mChildren      = null;

    mNumChildren   = new int[1];

    mNumChildren[0]= 0;

    if( mData!=null )

      {

      mData.numPointingNodes++;

      }

    else

      {

      mData = new NodeData(++mNextNodeID);   

    }

///////////////////////////////////////////////////////////////////////////////////////////////////  

/**

    else

      {

      int h = node.mSurface.getHeight();

        mSurface = new DistortedFramebuffer(w,h,hasDepth);

        {

        node.mChildren = new ArrayList<>(2);

        }

      mNumChildren = node.mNumChildren;

      }

    else

      {

      mChildren = null;

      mNumChildren = new int[1];

      mNumChildren[0] = 0;

      }

    ArrayList<Long> list = generateIDList();

    mData = mMapNodeID.get(list);

    if( mData!=null )

      {

      mData.numPointingNodes++;

      }

    else

      {

      mData = new NodeData(++mNextNodeID);   

      mMapNodeID.put(list, mData);

      }

    }

/**

 * Adds a new child to the last position in the list of our Node's children.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

 * DistortedAttachDeamon (by calling attachNow())

 *

 */

/**

 * Adds a new child to the last position in the list of our Node's children.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

 * DistortedAttachDeamon (by calling attachNow())

 *

 */

    DistortedAttachDaemon.attach(this,node);

    return node;

    }

/**

 * This is not really part of the public API. Has to be public only because it is a part of the

 * DistortedAttacheable interface, which should really be a class that we extend here instead but

 * Java has no multiple inheritance.

 *

 * @param node The new Node to add.

 */

  public void attachNow(DistortedNode node)

    {

    mNumChildren[0]++;

    }

/**

 * Removes the first occurrence of a specified child from the list of children of our Node.

 * We cannot do this mid-render - actual detachment will be done just before the next render, by the

 * DistortedAttachDeamon (by calling detachNow())

 *

 */

/**

 * Removes the first occurrence of a specified child from the list of children of our Node.

 * A bit questionable method as there can be many different Nodes attached as children, some

 * of them having the same Effects but - for instance - different Mesh. Use with care.

 * We cannot do this mid-render - actual detachment will be done just before the next render, by the

 * DistortedAttachDeamon (by calling detachNow())

      {

      node = mChildren.get(i);

        break;

      }

    }

/**

 * DistortedAttacheable interface, which should really be a class that we extend here instead but

 * Java has no multiple inheritance.

 *

 * @param node The Node to remove.

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Removes all children Nodes.

 * <p>

 * We cannot do this mid-render - actual detachment will be done just before the next render, by the

 * DistortedAttachDeamon (by calling detachAllNow())

 */

  public void detachAll()

    {

    DistortedAttachDaemon.detachAll(this);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * This is not really part of the public API. Has to be public only because it is a part of the

 * DistortedAttacheable interface, which should really be a class that we extend here instead but

 * Java has no multiple inheritance.

 */

  public void detachAllNow()

    {

      {

      mNumChildren[0] = 0;

      mChildren.clear();

      }

    }

/**

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

/**

 * Returns the DistortedFramebuffer object that's in the Node.

 *

 * @return The DistortedFramebuffer contained in the Node.

 */

  public DistortedFramebuffer getFramebuffer()

    {

    return mData.mFBO;

    }