TwistyPuzzleLib

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

// Copyright 2020 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Magic Cube.                                                              //

//                                                                                               //

// Magic Cube 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.                                                           //

//                                                                                               //

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

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

package org.distorted.objectlib.objects;

import static org.distorted.objectlib.touchcontrol.TouchControlDodecahedron.COS54;

import static org.distorted.objectlib.touchcontrol.TouchControlDodecahedron.SIN54;

import java.io.InputStream;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import org.distorted.library.main.QuatHelper;

import org.distorted.objectlib.main.ObjectControl;

import org.distorted.objectlib.main.ObjectType;

import org.distorted.objectlib.helpers.ObjectShape;

import org.distorted.objectlib.helpers.ObjectSticker;

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

public class TwistyKilominx extends TwistyMinx

{

  private int[] mCenterFaceMap;

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

  public TwistyKilominx(int[] numL, int meshState, Static4D quat, Static3D move, float scale, InputStream stream)

    {

    super(numL, meshState, quat, move, scale, stream);

    }

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

  void initializeCenterFaceMap()

    {

    mCenterFaceMap = new int[]

      {

        0,0,0,0,1,

        1,0,1,1,0,

        2,0,1,1,0,

        2,2,1,0,2,

        2,1,0,0,1,

        1,2,0,1,0,

        0,1,0,1,1,

        0,1,0,2,0,

        2,1,2,2,2,

        1,0,2,1,2,

        2,1,0,1,2,

        2,2,2,2,2

      };

    }

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

  private int numCubitsPerCorner(int numLayers)

    {

    return 3*((numLayers-3)/2)*((numLayers-5)/2) + (numLayers<5 ? 0:1);

    }

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

  private int numCubitsPerEdge(int numLayers)

    {

    return numLayers<5 ? 0 : 2*(numLayers-4);

    }

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

  public float[][] getCuts(int[] numLayers)

    {

    return genericGetCuts(numLayers[0],0.5f);

    }

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

// Fill out mCurrCorner{X,Y,Z} by applying appropriate Quat to mBasicCorner{X,Y,Z}

// Appropriate one: QUATS[QUAT_INDICES[corner]].

  private void computeBasicCornerVectors(int corner)

    {

    if( mQuatCornerIndices==null ) initializeQuatIndices();

    if( mQuats==null ) initializeQuats();

    if( mCurrCornerV==null || mBasicCornerV==null ) initializeCornerV();

    Static4D quat = mQuats[mQuatCornerIndices[corner]];

    mCurrCornerV[0] = QuatHelper.rotateVectorByQuat(mBasicCornerV[0],quat);

    mCurrCornerV[1] = QuatHelper.rotateVectorByQuat(mBasicCornerV[1],quat);

    mCurrCornerV[2] = QuatHelper.rotateVectorByQuat(mBasicCornerV[2],quat);

    }

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

  private float[] computeCorner(int numCubitsPerCorner, int numLayers, int corner, int part)

    {

    if( mCorners==null ) initializeCorners();

    if( mCurrCornerV==null || mBasicCornerV==null ) initializeCornerV();

    float D = numLayers/3.0f;

    float[] corn = mCorners[corner];

    if( part==0 )

      {

      return new float[] { corn[0]*D, corn[1]*D, corn[2]*D };

      }

    else

      {

      float E = D/(0.5f*(numLayers-1));   // ?? maybe 0.5*

      int N = (numCubitsPerCorner-1)/3;

      int block = (part-1) % N;

      int index = (part-1) / N;

      Static4D pri = mCurrCornerV[index];

      Static4D sec = mCurrCornerV[(index+2)%3];

      int layers= (numLayers-5)/2;

      int multP = (block % layers) + 1;

      int multS = (block / layers);

      return new float[] {

                          corn[0]*D + (pri.get0()*multP + sec.get0()*multS)*E,

                          corn[1]*D + (pri.get1()*multP + sec.get1()*multS)*E,

                          corn[2]*D + (pri.get2()*multP + sec.get2()*multS)*E

                         };

      }

    }

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

  private float[] computeCenter(int numLayers, int center, int part)

    {

    if( mCenterCoords==null ) initializeCenterCoords();

    if( mCorners     ==null ) initializeCorners();

    if( mCenterMap   ==null ) initializeCenterMap();

    int corner = mCenterMap[center][part];

    float[] cent = mCenterCoords[center];

    float[] corn = mCorners[corner];

    float D = numLayers/3.0f;

    float F = 1.0f - (2.0f*numLayers-6.0f)/(numLayers-1)*COS54*COS54;

    return new float[]

      {

        D * ( cent[0] + (corn[0]-cent[0])*F),

        D * ( cent[1] + (corn[1]-cent[1])*F),

        D * ( cent[2] + (corn[2]-cent[2])*F)

      };

    }

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

  private int computeEdgeType(int cubit, int numCubitsPerCorner, int numCubitsPerEdge)

    {

    int part = (cubit - NUM_CORNERS*numCubitsPerCorner) % numCubitsPerEdge;

    return part - 2*(part/4);

    }

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

  private float[] computeEdge(int numLayers, int edge, int part)

    {

    if( mCenterCoords==null ) initializeCenterCoords();

    if( mCorners==null ) initializeCorners();

    if( mEdgeMap==null ) initializeEdgeMap();

    float D = numLayers/3.0f;

    float[] c1 = mCorners[ mEdgeMap[edge][0] ];

    float[] c2 = mCorners[ mEdgeMap[edge][1] ];

    int leftRight = 2*(part%2) -1;

    part /= 2;

    if( part==0 )

      {

      float T = 0.5f + leftRight/(numLayers-1.0f);

      float x = D * (T*c1[0]+(1.0f-T)*c2[0]);

      float y = D * (T*c1[1]+(1.0f-T)*c2[1]);

      float z = D * (T*c1[2]+(1.0f-T)*c2[2]);

      return new float[] { x, y, z };

      }

    else

      {

      int mult = (part+1)/2;

      int dir  = (part+1)%2;

      float[] center = mCenterCoords[ mEdgeMap[edge][dir+2] ];

      float x = 0.5f * D * (c1[0]+c2[0]);

      float y = 0.5f * D * (c1[1]+c2[1]);

      float z = 0.5f * D * (c1[2]+c2[2]);

      float vX = D*center[0] - x;

      float vY = D*center[1] - y;

      float vZ = D*center[2] - z;

      float T = 0.5f + leftRight*(mult*SIN18 + 1.0f)/(numLayers-1);

      x = D * (T*c1[0]+(1.0f-T)*c2[0]);

      y = D * (T*c1[1]+(1.0f-T)*c2[1]);

      z = D * (T*c1[2]+(1.0f-T)*c2[2]);

      float H = mult*D*COS18/(numLayers-1);

      H /= (float)Math.sqrt(vX*vX+vY*vY+vZ*vZ);

      return new float[] { x + H*vX, y + H*vY, z + H*vZ };

      }

    }

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

  public float[][] getCubitPositions(int[] numLayers)

    {

    if( mCorners==null ) initializeCorners();

    int numL = numLayers[0];

    if( numL<5 ) return mCorners;

    int numCubitsPerCorner = numCubitsPerCorner(numL);

    int numCubitsPerEdge   = numCubitsPerEdge(numL);

    int numCubitsPerCenter = 5;

    int numCubits = NUM_CORNERS*numCubitsPerCorner + NUM_EDGES*numCubitsPerEdge + NUM_CENTERS*numCubitsPerCenter;

    int index=0;

    final float[][] CENTERS = new float[numCubits][];

    for(int corner=0; corner<NUM_CORNERS; corner++)

      {

      computeBasicCornerVectors(corner);

      for(int part=0; part<numCubitsPerCorner; part++, index++)

        {

        CENTERS[index] = computeCorner(numCubitsPerCorner,numL,corner,part);

        }

      }

    for(int edge=0; edge<NUM_EDGES; edge++)

      {

      for(int part=0; part<numCubitsPerEdge; part++, index++)

        {

        CENTERS[index] = computeEdge(numL, edge, part );

        }

      }

    for(int center=0; center<NUM_CENTERS; center++)

      {

      for(int part=0; part<numCubitsPerCenter; part++, index++)

        {

        CENTERS[index] = computeCenter(numL,center, part);

        }

      }

    return CENTERS;

    }

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

  private int getQuat(int cubit, int numCubitsPerCorner, int numCubitsPerEdge)

    {

    if( mQuatCornerIndices==null || mQuatEdgeIndices==null ) initializeQuatIndices();

    if( mCenterMap==null ) initializeCenterMap();

    if( cubit < NUM_CORNERS*numCubitsPerCorner )

      {

      int corner = cubit/numCubitsPerCorner;

      return mQuatCornerIndices[corner];

      }

    if( cubit < NUM_CORNERS*numCubitsPerCorner + NUM_EDGES*numCubitsPerEdge )

      {

      int edge = (cubit-NUM_CORNERS*numCubitsPerCorner)/numCubitsPerEdge;

      return mQuatEdgeIndices[edge];

      }

    if( numCubitsPerCorner==0 )

      {

      return mQuatCornerIndices[cubit];

      }

    else

      {

      cubit -= (NUM_CORNERS*numCubitsPerCorner + NUM_EDGES*numCubitsPerEdge);

      int numCubitsPerCenter = 5;

      int face = cubit/numCubitsPerCenter;

      int index= cubit%numCubitsPerCenter;

      int center=mCenterMap[face][index];

      return mQuatCornerIndices[center];

      }

    }

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

  public ObjectShape getObjectShape(int variant)

    {

    int[] numLayers = getNumLayers();

    int numVariants = getNumCubitVariants(numLayers);

    int numL        = numLayers[0];

    boolean small   = numL<=3;

    if( variant==0 && !small )

      {

      float width = numL/(numL-1.0f);

      float A = (2*SQ3/3)*SIN54;

      float B = 0.4f;

      float X = width*COS18*SIN_HALFD;

      float Y = width*SIN18;

      float Z = width*COS18*COS_HALFD;

      float[][] vertices = new float[][]

        {

            {   0,   0      ,   0 },

            {   X,   Y      ,  -Z },

            {   0, 2*Y      ,-2*Z },

            {  -X,   Y      ,  -Z },

            {   0,   0-width,   0 },

            {   X,   Y-width,  -Z },

            {   0, 2*Y-width,-2*Z },

            {  -X,   Y-width,  -Z },

        };

      int[][] vertIndexes = new int[][]

        {

            {4,5,1,0},

            {7,4,0,3},

            {0,1,2,3},

            {4,5,6,7},

            {6,5,1,2},

            {7,6,2,3}

        };

      float[][] bands     = new float[][]

        {

         {0.04f,34,0.3f,0.2f, 3, 0, 0},

         {0.00f,34,0.0f,0.0f, 2, 0, 0}

        };

      int[] bandIndices   = new int[] { 0,0,0,1,1,1};

      float[][] corners   = new float[][] { {0.04f,0.10f} };

      int[] cornerIndices = new int[] { 0,-1,-1,-1,-1,-1,-1,-1 };

      float[][] centers   = new float[][] { {0.0f, -(float)Math.sqrt(1-A*A)*B,-A*B} };

      int[] centerIndices = new int[] { 0,-1,-1,-1,-1,-1,-1,-1 };

      return new ObjectShape(vertices,vertIndexes,bands,bandIndices,corners,cornerIndices,centers,centerIndices,getNumCubitFaces(), null, 3);

      }

    if( variant<numVariants-1 )

      {

      int type = variant-1;

      float tmpVal= numL/(numL-1.0f);

      float height= tmpVal*COS18;

      float width = tmpVal + (type/2)*tmpVal*SIN18;

      boolean left = (type%2)==0;

      float X = height*SIN_HALFD;

      float Y = height*SIN18/COS18;

      float Z = height*COS_HALFD;

      float[][] vertices = new float[][]

        {

            {   0,   0   ,   0 },

            {   X,   Y   ,  -Z },

            {   0, 2*Y   ,-2*Z },

            {  -X,   Y   ,  -Z },

            {   0, -width,   0 },

            {   X, -width,  -Z },

            {   0, -width,-2*Z },

            {  -X, -width,  -Z },

        };

      int[][] vertIndexes = new int[][]

        {

            {4,5,1,0},

            {7,4,0,3},

            {7,6,2,3},

            {6,5,1,2},

            {0,1,2,3},

            {4,5,6,7}

        };

      if( !left )

        {

        int tmp, len = vertices.length;

        for(int i=0; i<len; i++) vertices[i][1] = -vertices[i][1];

        len = vertIndexes.length;

        for(int i=0; i<len; i++)

          {

          tmp = vertIndexes[i][0];

          vertIndexes[i][0] = vertIndexes[i][3];

          vertIndexes[i][3] = tmp;

          tmp = vertIndexes[i][1];

          vertIndexes[i][1] = vertIndexes[i][2];

          vertIndexes[i][2] = tmp;

          }

        }

      int E  = small ? 1 : 0;

      int N0 = small ? 4 : 3;

      int N1 = small ? 3 : 2;

      float[][] bands = new float[][]

        {

         {0.04f,34,0.2f,0.2f,N0,E,E},

         {0.00f,34,0.0f,0.0f,N1,0,0}

        };

      int[] bandIndices   = new int[] { 0,0,1,1,1,1};

      float[][] corners   = new float[][] { {0.04f,0.10f} };

      int[] cornerIndices = new int[] { 0,-1,-1,-1, 0,-1,-1,-1 };

      float[][] centers   = new float[][] { {0.0f, -width/2, (float)(-2*Z)} };

      int[] centerIndices = new int[] { 0,-1,-1,-1, 0,-1,-1,-1 };

      return new ObjectShape(vertices,vertIndexes,bands,bandIndices,corners,cornerIndices,centers,centerIndices,getNumCubitFaces(), null, 2);

      }

    else

      {

      float width = (1+0.5f*(numL-3)*SIN18)*numL/(numL-1);

      float X = width*COS18*SIN_HALFD;

      float Y = width*SIN18;

      float Z = width*COS18*COS_HALFD;

      float H = width*(SIN54/COS54);

      float H3= H/COS_HALFD;

      float X3= H*SIN_HALFD;

      float Z3= H*COS_HALFD;

      float C = 1/(COS54*(float)Math.sqrt(2-2*SIN18));

      int N = small ? 4 : 3;

      int E = small ? 1 : 0;

      float[][] vertices = new float[][]

        {

            {   0,   0  ,     0 },

            {   X,   Y  ,    -Z },

            {   0,C*2*Y ,-2*C*Z },

            {  -X,   Y  ,    -Z },

            {   0,-width,     0 },

            {  X3,-width,   -Z3 },

            {   0,-width,   -H3 },

            { -X3,-width,   -Z3 }

        };

      int[][] vertIndexes = new int[][]

        {

            {4,5,1,0},

            {7,4,0,3},

            {0,1,2,3},

            {7,6,2,3},

            {6,5,1,2},

            {4,5,6,7}

        };

      float[][] bands = new float[][]

        {

         {0.04f,17,0.3f,0.2f,N,E,E},

         {0.00f,17,0.3f,0.2f,N,E,E}

        };

      float A = (2*SQ3/3)*SIN54;

      float B = 0.4f;

      int[] bandIndices   = new int[] { 0,0,0,1,1,1};

      float[][] corners   = new float[][] { {0.03f,0.10f} };

      int[] cornerIndices = new int[] { 0, 0,-1, 0, 0,-1,-1,-1 };

      float[][] centers   = new float[][] { {0.0f, -(float)Math.sqrt(1-A*A)*B,-A*B} };

      int[] centerIndices = new int[] { 0, 0,-1, 0, 0,-1,-1,-1 };

      return new ObjectShape(vertices,vertIndexes,bands,bandIndices,corners,cornerIndices,centers,centerIndices,getNumCubitFaces(), null, 1);

      }

    }

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

  public Static4D getQuat(int cubit, int[] numLayers)

    {

    if( mQuats==null ) initializeQuats();

    int numL = numLayers[0];

    int numCubitsPerCorner = numCubitsPerCorner(numL);

    int numCubitsPerEdge   = numCubitsPerEdge(numL);

    return mQuats[getQuat(cubit,numCubitsPerCorner,numCubitsPerEdge)];

    }

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

  public int getNumCubitVariants(int[] numLayers)

    {

    switch(numLayers[0])

      {

      case 3: return 1;

      case 5: return 4;

      }

    return 1;

    }

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

  public int getCubitVariant(int cubit, int[] numLayers)

    {

    int numL = numLayers[0];

    int numCubitsPerCorner = numCubitsPerCorner(numL);

    if( cubit<NUM_CORNERS*numCubitsPerCorner ) return 0;

    int numCubitsPerEdge = numCubitsPerEdge(numL);

    if( cubit<NUM_CORNERS*numCubitsPerCorner + NUM_EDGES*numCubitsPerEdge )

      {

      int type = computeEdgeType(cubit,numCubitsPerCorner,numCubitsPerEdge);

      return type+1;

      }

    return getNumCubitVariants(numLayers)-1;

    }

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

  int getCornerColor(int cubit, int cubitface, int numLayers, int numCubitsPerCorner)

    {

    if( mCornerFaceMap==null ) initializeCornerFaceMap();

    if( cubitface<0 || cubitface>2 ) return NUM_TEXTURES;

    int part  = cubit % numCubitsPerCorner;

    int corner= cubit / numCubitsPerCorner;

    int color = mCornerFaceMap[corner][cubitface];

    if( part==0 )

      {

      return color;

      }

    else

      {

      int N = (numCubitsPerCorner-1)/3;

      int block = (part-1) % N;

      int index = (part-1) / N;

      if( block< (numLayers-3)/2 )

        {

        switch(index)

          {

          case 0: return cubitface==1 ? NUM_TEXTURES : color;

          case 1: return cubitface==0 ? NUM_TEXTURES : color;

          case 2: return cubitface==2 ? NUM_TEXTURES : color;

          }

        }

      else

        {

        switch(index)

          {

          case 0: return cubitface==0 ? color : NUM_TEXTURES;

          case 1: return cubitface==2 ? color : NUM_TEXTURES;

          case 2: return cubitface==1 ? color : NUM_TEXTURES;

          }

        }

      }

    return NUM_TEXTURES;

    }

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

  int getEdgeColor(int edge, int cubitface, int numCubitsPerEdge)

    {

    if( cubitface<0 || cubitface>1 ) return -1;

    int part    = edge % numCubitsPerEdge;

    int variant = edge / numCubitsPerEdge;

    if( mEdgeMap==null ) initializeEdgeMap();

    part /= 2;

    return (part==0 || cubitface==((part+1)%2)) ? mEdgeMap[variant][cubitface+2] : -1;

    }

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

  int getCenterColor(int center, int cubitface, int numLayers)

    {

    if( mCenterFaceMap==null ) initializeCenterFaceMap();

    if( mCornerFaceMap==null ) initializeCornerFaceMap();

    if( numLayers==3 )

      {

      return cubitface>=0 && cubitface<3 ? mCornerFaceMap[center][cubitface] : -1;

      }

    return cubitface==mCenterFaceMap[center] ? center/5 : -1;

    }

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

  public int getCubitFaceColor(int cubit, int face, int[] numLayers)

    {

    int numL = numLayers[0];

    int numCubitsPerCorner = numCubitsPerCorner(numL);

    int numCubitsPerEdge   = numCubitsPerEdge(numL);

    if( cubit < NUM_CORNERS*numCubitsPerCorner )

      {

      return getCornerColor(cubit,face,numL,numCubitsPerCorner);

      }

    else if( cubit<NUM_CORNERS*numCubitsPerCorner + NUM_EDGES*numCubitsPerEdge )

      {

      int edge = cubit - NUM_CORNERS*numCubitsPerCorner;

      return getEdgeColor(edge,face,numCubitsPerEdge);

      }

    else

      {

      int center = cubit-NUM_CORNERS*numCubitsPerCorner-NUM_EDGES*numCubitsPerEdge;

      return getCenterColor( center, face, numL);

      }

    }

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

  public int getVariantFaceColor(int variant, int face, int[] numLayers)

    {

    return face>=mStickerVariants[variant].length ? -1 : mStickerVariants[variant][face];

    }

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

// make the 'center' sticker artificially larger, so that we paint over the area in the center of the face.

  public void adjustStickerCoords()

    {

    int[] numLayers = getNumLayers();

    int index = numLayers[0]==3 ? 0:2;

    float CENTER_CORR = 0.87f;

/*

    float C = 1.14f;

    mStickerCoords[index][0] *= C;

    mStickerCoords[index][1] *= C;

    mStickerCoords[index][2] *= C;

    mStickerCoords[index][3] *= C;

    mStickerCoords[index][4] *= C;

    mStickerCoords[index][5] *= C;

    mStickerCoords[index][6] *= C;

    mStickerCoords[index][7] *= C;

*/

    mStickerCoords[index][2] *= CENTER_CORR;

    mStickerCoords[index][3] *= CENTER_CORR;

    }

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

  private float getRadius()

    {

    return 0.15f;

    }

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

  private float getStroke()

    {

    float stroke = 0.25f;

    if( ObjectControl.isInIconMode() )

      {

      int[] numLayers = getNumLayers();

      if( numLayers[0]>3 ) stroke*=1.5f;

      }

    return stroke;

    }

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

  public ObjectSticker retSticker(int sticker)

    {

    if( mStickers==null )

      {

      float rad = getRadius();

      float str = getStroke();

      int numStickers = mStickerCoords.length;

      mStickers = new ObjectSticker[numStickers];

      for(int s=0; s<numStickers; s++)

        {

        float scale = mStickerScales[s];

        float radius = rad / scale;

        float stroke = str / scale;

        int len = mStickerCoords[s].length;

        float[] radii = new float[len];

        for(int r=0; r<len; r++) radii[r] = radius;

        mStickers[s] = new ObjectSticker(mStickerCoords[s],null,radii,stroke);

        }

      }

    return mStickers[sticker];

    }

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

  public ObjectType intGetObjectType(int[] numLayers)

    {

    switch(numLayers[0])

      {

      case 3: return ObjectType.KILO_3;

      case 5: return ObjectType.KILO_5;

      }

    return ObjectType.KILO_3;

    }

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

  public String getObjectName()

    {

    switch(getNumLayers()[0])

      {

      case 3: return "Kilominx";

      case 5: return "Master Kilominx";

      }

    return "Kilominx";

    }

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

  public String getInventor()

    {

    switch(getNumLayers()[0])

      {

      case 3: return "Thomas de Bruin";

      case 5: return "David Gugl";

      }

    return "Thomas de Bruin";

    }

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

  public int getYearOfInvention()

    {

    switch(getNumLayers()[0])

      {

      case 3: return 2008;