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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski //
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// //
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// This file is part of Distorted. //
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// //
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// Distorted is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Distorted is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.util.ArrayList;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Create a 3D grid composed of Cubes.
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* <p>
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* Any subset of a MxNx1 cuboid is possible.
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*/
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public class MeshCubes extends MeshObject
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{
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private static final float R = 0.0f;//0.2f;
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private static final float FRONTZ = 0.5f;
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private static final float BACKZ =-0.5f;
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private static final int NORTH = 0;
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private static final int WEST = 1;
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private static final int EAST = 2;
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private static final int SOUTH = 3;
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private static final boolean BACK = true;
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private static final boolean FRONT = false;
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private static final boolean UPPER = false;
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private static final boolean LOWER = true;
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private static final float[] mNormalX = new float[4];
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private static final float[] mNormalY = new float[4];
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private static final float[] mNormalZ = new float[4];
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private class Edge
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{
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final int side;
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final int row;
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final int col;
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Edge(int s, int r, int c)
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{
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side= s;
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row = r;
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col = c;
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}
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}
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private int mCols, mRows, mSlices;
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private int[][] mCubes;
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private ArrayList<Edge> mEdges = new ArrayList<>();
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private int remainingVert;
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private int mSideBends;
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private int mEdgeNum;
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private int mSideWalls;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// a Block is split into two triangles along the NE-SW line iff it is in the top-right
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// or bottom-left quadrant of the grid.
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private boolean isNE(int row,int col)
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{
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return ( (2*row<mRows)^(2*col<mCols) );
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// return the number of vertices our grid will contain
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private int computeDataLength()
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{
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int frontWalls=0, frontSegments=0, triangleShifts=0, windingShifts=0;
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int shiftCol = (mCols-1)/2;
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boolean lastBlockIsNE=false;
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boolean thisBlockIsNE; // the block we are currently looking at is split into
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// two triangles along the NE-SW line (rather than NW-SE)
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for(int row=0; row<mRows; row++)
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{
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if( mCols>=2 && (mCubes[row][shiftCol]%2 == 1) && (mCubes[row][shiftCol+1]%2 == 1) ) triangleShifts++;
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for(int col=0; col<mCols; col++)
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{
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if( mCubes[row][col]%2 == 1 ) // land
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{
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thisBlockIsNE = isNE(row,col);
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if( thisBlockIsNE^lastBlockIsNE ) windingShifts++;
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lastBlockIsNE = thisBlockIsNE;
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frontWalls++;
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if( col==mCols-1 || mCubes[row][col+1]%2 == 0 ) frontSegments++;
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}
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}
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}
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int frontVert = 2*( frontWalls + 2*frontSegments - 1) +2*triangleShifts + windingShifts;
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int sideVertOneSlice= 2*( mSideWalls + mSideBends + mEdgeNum -1);
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int sideVert = 2*(mSlices-1) + mSlices*sideVertOneSlice;
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int firstWinding = (mSlices>0 && (frontVert+1)%2==1 ) ? 1:0;
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int dataL = mSlices==0 ? frontVert : (frontVert+1) +firstWinding+ (1+sideVert+1) + (1+frontVert);
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/*
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android.util.Log.e("CUBES","triangleShifts="+triangleShifts+" windingShifts="+windingShifts+" winding1="+firstWinding+" frontVert="+frontVert+" sideVert="+sideVert);
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android.util.Log.e("CUBES", "frontW="+frontWalls+" fSegments="+frontSegments+" sWalls="+mSideWalls+" sSegments="+mEdgeNum+" sideBends="+mSideBends+" dataLen="+dataL );
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*/
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return dataL<0 ? 0:dataL;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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private static String debug(short[] val)
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{
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String ret="";j
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for(int i=0; i<val.length; i++) ret+=(" "+val[i]);
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return ret;
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}
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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private static String debug(float[] val, int stop)
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{
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String ret="";
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for(int i=0; i<val.length; i++)
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{
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if( i%stop==0 ) ret+="\n";
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ret+=(" "+val[i]);
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}
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return ret;
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}
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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private static String debug(Edge e)
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{
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String d = "";
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switch(e.side)
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{
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case NORTH: d+="NORTH "; break;
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case SOUTH: d+="SOUTH "; break;
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case WEST : d+="WEST "; break;
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case EAST : d+="EAST "; break;
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}
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d+=("("+e.row+","+e.col+")");
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return d;
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}
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void prepareDataStructures(int cols, String desc, int slices)
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{
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mRows =0;
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mCols =0;
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mSlices =slices;
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numVertices=0;
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if( cols>0 && desc.contains("1") )
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{
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mCols = cols;
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mRows = desc.length()/cols;
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mCubes = new int[mRows][mCols];
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for(int j=0; j<mCols; j++)
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for(int i=0; i<mRows; i++)
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mCubes[i][j] = (desc.charAt(i*mCols+j) == '1' ? 1:0);
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markRegions();
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numVertices = computeDataLength();
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remainingVert = numVertices;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// full grid
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private void prepareDataStructures(int cols, int rows, int slices)
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{
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mRows =rows;
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mCols =cols;
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mSlices =slices;
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numVertices = 0;
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if( cols>0 && rows>0 )
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{
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mCubes = new int[mRows][mCols];
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for(int j=0; j<mCols; j++)
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for(int i=0; i<mRows; i++)
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mCubes[i][j] = 1;
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markRegions();
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numVertices = computeDataLength();
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remainingVert = numVertices;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Mark all the 'regions' of our grid - i.e. separate pieces of 'land' (connected blocks that will
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// be rendered) and 'water' (connected holes in between) with integers. Each connected block of land
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// gets a unique odd integer, each connected block of water a unique even integer.
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//
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// Water on the edges of the grid is also considered connected to itself!
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//
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// This function also creates a list of 'Edges'. Each Edge is a data structure from which later on we
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// will start building the side walls of each connected block of land (and sides of holes of water
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// inside). Each Edge needs to point from Land to Water (thus the '(SOUTH,i-1,j)' below) - otherwise
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// later on setting up normal vectors wouldn't work.
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private void markRegions()
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{
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int i, j, numWater=1, numLand=0;
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for(i=0; i<mRows;i++) if( mCubes[ i][ 0]==0 ) markRegion((short)2, i, 0);
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for(i=0; i<mRows;i++) if( mCubes[ i][mCols-1]==0 ) markRegion((short)2, i, mCols-1);
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for(i=0; i<mCols;i++) if( mCubes[0 ][ i]==0 ) markRegion((short)2, 0, i);
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for(i=0; i<mCols;i++) if( mCubes[mRows-1][ i]==0 ) markRegion((short)2,mRows-1, i);
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for(i=0; i<mRows; i++)
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for(j=0; j<mCols; j++)
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{
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if( mCubes[i][j] == 0 ) { numWater++; markRegion( (short)(2*numWater ),i,j); mEdges.add(new Edge(SOUTH,i-1,j)); }
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if( mCubes[i][j] == 1 ) { numLand ++; markRegion( (short)(2*numLand+1),i,j); mEdges.add(new Edge(NORTH,i ,j)); }
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}
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// now we potentially need to kick out some Edges . Otherwise the following does not work:
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//
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// 0 1 0
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// 1 0 1
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// 0 1 0
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mEdgeNum= mEdges.size();
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int initCol, initRow, initSide, lastSide;
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Edge e1,e2;
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for(i=0; i<mEdgeNum; i++)
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{
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e1 = mEdges.get(i);
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initRow= e1.row;
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initCol= e1.col;
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initSide=e1.side;
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do
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{
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//android.util.Log.d("CUBES", "checking edge "+debug(e1));
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mSideWalls++;
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if( e1.side==NORTH || e1.side==SOUTH )
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{
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for(j=i+1;j<mEdgeNum;j++)
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{
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e2 = mEdges.get(j);
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if( e2.side==e1.side && e2.row==e1.row && e2.col==e1.col )
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{
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mEdges.remove(j);
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mEdgeNum--;
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j--;
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//android.util.Log.e("CUBES", "removing edge "+debug(e2));
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}
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}
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}
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lastSide = e1.side;
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e1 = getNextEdge(e1);
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if( e1.side!=lastSide ) mSideBends++;
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}
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while( e1.col!=initCol || e1.row!=initRow || e1.side!=initSide );
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// when calling, make sure that newVal != val
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private void markRegion(short newVal, int row, int col)
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{
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int val = mCubes[row][col];
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mCubes[row][col] = newVal;
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if( row>0 && mCubes[row-1][col ]==val ) markRegion(newVal, row-1, col );
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if( row<mRows-1 && mCubes[row+1][col ]==val ) markRegion(newVal, row+1, col );
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if( col>0 && mCubes[row ][col-1]==val ) markRegion(newVal, row , col-1);
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if( col<mCols-1 && mCubes[row ][col+1]==val ) markRegion(newVal, row , col+1);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void createNormals(boolean front, int row, int col)
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{
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int td,lr;
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int nw = (col>0 && row>0 ) ? (mCubes[row-1][col-1]%2) : 0;
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int w = (col>0 ) ? (mCubes[row ][col-1]%2) : 0;
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int n = ( row>0 ) ? (mCubes[row-1][col ]%2) : 0;
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int c = (mCubes[row ][col ]%2);
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int sw = (col>0 && row<mRows-1) ? (mCubes[row+1][col-1]%2) : 0;
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int s = ( row<mRows-1) ? (mCubes[row+1][col ]%2) : 0;
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int ne = (col<mCols-1 && row>0 ) ? (mCubes[row-1][col+1]%2) : 0;
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int e = (col<mCols-1 ) ? (mCubes[row ][col+1]%2) : 0;
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int se = (col<mCols-1 && row<mRows-1) ? (mCubes[row+1][col+1]%2) : 0;
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if(front)
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{
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mNormalZ[0] = 1.0f;
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mNormalZ[1] = 1.0f;
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mNormalZ[2] = 1.0f;
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mNormalZ[3] = 1.0f;
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}
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else
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{
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mNormalZ[0] =-1.0f;
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mNormalZ[1] =-1.0f;
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mNormalZ[2] =-1.0f;
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mNormalZ[3] =-1.0f;
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}
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td = nw+n-w-c;
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lr = c+n-w-nw;
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if( td<0 ) td=-1;
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if( td>0 ) td= 1;
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if( lr<0 ) lr=-1;
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if( lr>0 ) lr= 1;
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mNormalX[0] = lr*R;
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mNormalY[0] = td*R;
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td = w+c-sw-s;
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lr = c+s-w-sw;
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if( td<0 ) td=-1;
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if( td>0 ) td= 1;
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if( lr<0 ) lr=-1;
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if( lr>0 ) lr= 1;
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mNormalX[1] = lr*R;
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mNormalY[1] = td*R;
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359
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td = n+ne-c-e;
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lr = e+ne-c-n;
|
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362
|
if( td<0 ) td=-1;
|
|
363
|
if( td>0 ) td= 1;
|
|
364
|
if( lr<0 ) lr=-1;
|
|
365
|
if( lr>0 ) lr= 1;
|
|
366
|
mNormalX[2] = lr*R;
|
|
367
|
mNormalY[2] = td*R;
|
|
368
|
|
|
369
|
td = c+e-s-se;
|
|
370
|
lr = e+se-c-s;
|
|
371
|
if( td<0 ) td=-1;
|
|
372
|
if( td>0 ) td= 1;
|
|
373
|
if( lr<0 ) lr=-1;
|
|
374
|
if( lr>0 ) lr= 1;
|
|
375
|
mNormalX[3] = lr*R;
|
|
376
|
mNormalY[3] = td*R;
|
|
377
|
/*
|
|
378
|
android.util.Log.d("CUBES", "row="+row+" col="+col);
|
|
379
|
android.util.Log.d("CUBES", mNormalX[0]+" "+mNormalY[0]);
|
|
380
|
android.util.Log.d("CUBES", mNormalX[1]+" "+mNormalY[1]);
|
|
381
|
android.util.Log.d("CUBES", mNormalX[2]+" "+mNormalY[2]);
|
|
382
|
android.util.Log.d("CUBES", mNormalX[3]+" "+mNormalY[3]);
|
|
383
|
*/
|
|
384
|
}
|
|
385
|
|
|
386
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
387
|
|
|
388
|
private int buildFrontBackGrid(boolean front, int vertex, float[] attribs)
|
|
389
|
{
|
|
390
|
int last, current;
|
|
391
|
boolean seenLand=false;
|
|
392
|
boolean lastBlockIsNE = false;
|
|
393
|
boolean currentBlockIsNE;
|
|
394
|
float vectZ = front?FRONTZ:BACKZ;
|
|
395
|
|
|
396
|
//android.util.Log.d("CUBES", "buildFrontBack");
|
|
397
|
|
|
398
|
for(int row=0; row<mRows; row++)
|
|
399
|
{
|
|
400
|
last =0;
|
|
401
|
|
|
402
|
for(int col=0; col<mCols; col++)
|
|
403
|
{
|
|
404
|
current = mCubes[row][col];
|
|
405
|
|
|
406
|
if( current%2 == 1 )
|
|
407
|
{
|
|
408
|
currentBlockIsNE = isNE(row,col);
|
|
409
|
|
|
410
|
if( !seenLand && !front && ((vertex%2==1)^currentBlockIsNE) )
|
|
411
|
{
|
|
412
|
//android.util.Log.d("CUBES","repeating winding2 vertex");
|
|
413
|
|
|
414
|
vertex = repeatLast(vertex,attribs);
|
|
415
|
}
|
|
416
|
|
|
417
|
createNormals(front,row,col);
|
|
418
|
|
|
419
|
if( currentBlockIsNE )
|
|
420
|
{
|
|
421
|
if( (last!=current) || !lastBlockIsNE )
|
|
422
|
{
|
|
423
|
if( seenLand && (last != current) ) vertex = repeatLast(vertex,attribs);
|
|
424
|
vertex= addFrontVertex( vertex, 0, vectZ, col, row, attribs);
|
|
425
|
if( seenLand && (last != current) ) vertex = repeatLast(vertex,attribs);
|
|
426
|
if( !lastBlockIsNE || (!front && !seenLand) ) vertex = repeatLast(vertex,attribs);
|
|
427
|
vertex= addFrontVertex( vertex, 1, vectZ, col, row+1, attribs);
|
|
428
|
}
|
|
429
|
vertex= addFrontVertex( vertex, 2, vectZ, col+1, row, attribs);
|
|
430
|
vertex= addFrontVertex( vertex, 3, vectZ, col+1, row+1, attribs);
|
|
431
|
}
|
|
432
|
else
|
|
433
|
{
|
|
434
|
if( (last!=current) || lastBlockIsNE )
|
|
435
|
{
|
|
436
|
if( seenLand && (last != current) ) vertex = repeatLast(vertex,attribs);
|
|
437
|
vertex= addFrontVertex( vertex, 1, vectZ, col, row+1, attribs);
|
|
438
|
if( seenLand && (last != current) ) vertex = repeatLast(vertex,attribs);
|
|
439
|
if( lastBlockIsNE || (!front && !seenLand) ) vertex = repeatLast(vertex,attribs);
|
|
440
|
vertex= addFrontVertex( vertex, 0, vectZ, col, row, attribs);
|
|
441
|
}
|
|
442
|
vertex= addFrontVertex( vertex, 3, vectZ, col+1, row+1, attribs);
|
|
443
|
vertex= addFrontVertex( vertex, 2, vectZ, col+1, row , attribs);
|
|
444
|
}
|
|
445
|
|
|
446
|
seenLand = true;
|
|
447
|
lastBlockIsNE = currentBlockIsNE;
|
|
448
|
}
|
|
449
|
|
|
450
|
last = current;
|
|
451
|
}
|
|
452
|
}
|
|
453
|
|
|
454
|
return vertex;
|
|
455
|
}
|
|
456
|
|
|
457
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
458
|
|
|
459
|
private int repeatLast(int vertex, float[] attribs)
|
|
460
|
{
|
|
461
|
//android.util.Log.e("CUBES", "repeating last vertex!");
|
|
462
|
|
|
463
|
if( vertex>0 )
|
|
464
|
{
|
|
465
|
remainingVert--;
|
|
466
|
|
|
467
|
attribs[8*vertex ] = attribs[8*vertex-8];
|
|
468
|
attribs[8*vertex+1] = attribs[8*vertex-7];
|
|
469
|
attribs[8*vertex+2] = attribs[8*vertex-6];
|
|
470
|
attribs[8*vertex+3] = attribs[8*vertex-5];
|
|
471
|
attribs[8*vertex+4] = attribs[8*vertex-4];
|
|
472
|
attribs[8*vertex+5] = attribs[8*vertex-3];
|
|
473
|
attribs[8*vertex+6] = attribs[8*vertex-2];
|
|
474
|
attribs[8*vertex+7] = attribs[8*vertex-1];
|
|
475
|
|
|
476
|
vertex++;
|
|
477
|
}
|
|
478
|
|
|
479
|
return vertex;
|
|
480
|
}
|
|
481
|
|
|
482
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
483
|
|
|
484
|
private int buildSideGrid(int vertex, float[] attribs)
|
|
485
|
{
|
|
486
|
//android.util.Log.d("CUBES", "buildSide");
|
|
487
|
|
|
488
|
for(int i=0; i<mEdgeNum; i++)
|
|
489
|
{
|
|
490
|
vertex = buildIthSide(mEdges.get(i), vertex, attribs);
|
|
491
|
}
|
|
492
|
|
|
493
|
return vertex;
|
|
494
|
}
|
|
495
|
|
|
496
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
497
|
|
|
498
|
private int buildIthSide(Edge curr, int vertex, float[] attribs)
|
|
499
|
{
|
|
500
|
Edge prev, next;
|
|
501
|
int col, row, side;
|
|
502
|
|
|
503
|
if( curr.side==NORTH ) // water outside
|
|
504
|
{
|
|
505
|
prev = new Edge(WEST,curr.row,curr.col);
|
|
506
|
}
|
|
507
|
else // land outside; we need to move forward one link because we are
|
|
508
|
{ // going in opposite direction and we need to start from a bend.
|
|
509
|
prev = curr;
|
|
510
|
curr = new Edge(EAST,curr.row+1,curr.col-1);
|
|
511
|
}
|
|
512
|
|
|
513
|
for(int i=0; i<mSlices; i++)
|
|
514
|
{
|
|
515
|
col = curr.col;
|
|
516
|
row = curr.row;
|
|
517
|
side= curr.side;
|
|
518
|
next = getNextEdge(curr);
|
|
519
|
|
|
520
|
addSideVertex(curr,BACK,i+1,prev.side,vertex++,attribs);
|
|
521
|
|
|
522
|
do
|
|
523
|
{
|
|
524
|
if( prev.side!=curr.side )
|
|
525
|
{
|
|
526
|
addSideVertex(curr,BACK,i+1,prev.side,vertex++,attribs);
|
|
527
|
addSideVertex(curr,BACK,i ,prev.side,vertex++,attribs);
|
|
528
|
}
|
|
529
|
|
|
530
|
addSideVertex(curr,FRONT,i+1,next.side,vertex++,attribs);
|
|
531
|
addSideVertex(curr,FRONT,i ,next.side,vertex++,attribs);
|
|
532
|
|
|
533
|
prev = curr;
|
|
534
|
curr = next;
|
|
535
|
next = getNextEdge(curr);
|
|
536
|
}
|
|
537
|
while( curr.col!=col || curr.row!=row || curr.side!=side );
|
|
538
|
|
|
539
|
vertex = repeatLast(vertex,attribs);
|
|
540
|
}
|
|
541
|
|
|
542
|
return vertex;
|
|
543
|
}
|
|
544
|
|
|
545
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
546
|
|
|
547
|
private Edge getNextEdge(Edge curr)
|
|
548
|
{
|
|
549
|
int col = curr.col;
|
|
550
|
int row = curr.row;
|
|
551
|
|
|
552
|
//android.util.Log.e("CUBES", "row="+row+" col="+col+" mRows="+mRows+" mCols="+mCols);
|
|
553
|
|
|
554
|
switch(curr.side)
|
|
555
|
{
|
|
556
|
case NORTH: if( col==mCols-1 )
|
|
557
|
return new Edge(EAST,row,col);
|
|
558
|
if( row>0 && mCubes[row-1][col+1]==mCubes[row][col] )
|
|
559
|
return new Edge(WEST,row-1,col+1);
|
|
560
|
if( mCubes[row][col+1]==mCubes[row][col] )
|
|
561
|
return new Edge(NORTH,row,col+1);
|
|
562
|
else
|
|
563
|
return new Edge(EAST,row,col);
|
|
564
|
|
|
565
|
case SOUTH: if( col==0 )
|
|
566
|
return new Edge(WEST,row,col);
|
|
567
|
if( (row<mRows-1) && mCubes[row+1][col-1]==mCubes[row][col] )
|
|
568
|
return new Edge(EAST,row+1,col-1);
|
|
569
|
if( mCubes[row][col-1]==mCubes[row][col] )
|
|
570
|
return new Edge(SOUTH,row,col-1);
|
|
571
|
else
|
|
572
|
return new Edge(WEST,row,col);
|
|
573
|
|
|
574
|
case EAST : if( row==mRows-1 )
|
|
575
|
return new Edge(SOUTH,row,col);
|
|
576
|
if( (col<mCols-1) && mCubes[row+1][col+1]==mCubes[row][col] )
|
|
577
|
return new Edge(NORTH,row+1,col+1);
|
|
578
|
if( mCubes[row+1][col]==mCubes[row][col] )
|
|
579
|
return new Edge(EAST,row+1,col);
|
|
580
|
else
|
|
581
|
return new Edge(SOUTH,row,col);
|
|
582
|
|
|
583
|
default : if( row==0 )
|
|
584
|
return new Edge(NORTH,row,col);
|
|
585
|
if( col>0 && mCubes[row-1][col-1]==mCubes[row][col] )
|
|
586
|
return new Edge(SOUTH,row-1,col-1);
|
|
587
|
if( mCubes[row-1][col]==mCubes[row][col] )
|
|
588
|
return new Edge(WEST,row-1,col);
|
|
589
|
else
|
|
590
|
return new Edge(NORTH,row,col);
|
|
591
|
}
|
|
592
|
}
|
|
593
|
|
|
594
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
595
|
|
|
596
|
private int addFrontVertex(int vertex, int index, float vectZ, int col, int row, float[] attribs)
|
|
597
|
{
|
|
598
|
remainingVert--;
|
|
599
|
|
|
600
|
float x = (float)col/mCols;
|
|
601
|
float y = (float)row/mRows;
|
|
602
|
|
|
603
|
attribs[8*vertex ] = x-0.5f;
|
|
604
|
attribs[8*vertex+1] = 0.5f-y;
|
|
605
|
attribs[8*vertex+2] = vectZ;
|
|
606
|
attribs[8*vertex+3] = mNormalX[index];
|
|
607
|
attribs[8*vertex+4] = mNormalY[index];
|
|
608
|
attribs[8*vertex+5] = mNormalZ[index];
|
|
609
|
attribs[8*vertex+6] = x;
|
|
610
|
attribs[8*vertex+7] = 1.0f-y;
|
|
611
|
|
|
612
|
return vertex+1;
|
|
613
|
}
|
|
614
|
|
|
615
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
616
|
|
|
617
|
private void addSideVertex(Edge curr, boolean back, int slice,int side, int vertex, float[] attribs)
|
|
618
|
{
|
|
619
|
//android.util.Log.e("CUBES", "adding Side vertex!");
|
|
620
|
|
|
621
|
remainingVert--;
|
|
622
|
|
|
623
|
float x, y;
|
|
624
|
|
|
625
|
switch(curr.side)
|
|
626
|
{
|
|
627
|
case NORTH: x = (float)(back ? (curr.col ):(curr.col+1))/mCols;
|
|
628
|
|
|
629
|
attribs[8*vertex ] = x - 0.5f;
|
|
630
|
attribs[8*vertex+1] = 0.5f - (float)curr.row/mRows;
|
|
631
|
attribs[8*vertex+2] = FRONTZ + ((BACKZ-FRONTZ)*slice)/mSlices;
|
|
632
|
attribs[8*vertex+3] = side==NORTH ? 0.0f : (side==WEST?-R:R);
|
|
633
|
attribs[8*vertex+4] = 1.0f;
|
|
634
|
attribs[8*vertex+5] = (slice==0 ? R : (slice==mSlices ? -R:0) );
|
|
635
|
attribs[8*vertex+6] = x;
|
|
636
|
attribs[8*vertex+7] = 1.0f-(float)(curr.row-slice)/mRows;
|
|
637
|
break;
|
|
638
|
case SOUTH: x = (float)(back ? (curr.col+1):(curr.col ))/mCols;
|
|
639
|
|
|
640
|
attribs[8*vertex ] = x - 0.5f;
|
|
641
|
attribs[8*vertex+1] = 0.5f - (float)(curr.row+1)/mRows;
|
|
642
|
attribs[8*vertex+2] = FRONTZ + ((BACKZ-FRONTZ)*slice)/mSlices;
|
|
643
|
attribs[8*vertex+3] = side==SOUTH ? 0.0f: (side==EAST?-R:R);
|
|
644
|
attribs[8*vertex+4] =-1.0f;
|
|
645
|
attribs[8*vertex+5] = (slice==0 ? R : (slice==mSlices ? -R:0) );
|
|
646
|
attribs[8*vertex+6] = x;
|
|
647
|
attribs[8*vertex+7] = 1.0f - (float)(curr.row+1+slice)/mRows;
|
|
648
|
break;
|
|
649
|
case WEST : y = (float)(back ? (curr.row+1):(curr.row))/mRows;
|
|
650
|
|
|
651
|
attribs[8*vertex ] = (float)curr.col/mCols -0.5f;
|
|
652
|
attribs[8*vertex+1] = 0.5f - y;
|
|
653
|
attribs[8*vertex+2] = FRONTZ + ((BACKZ-FRONTZ)*slice)/mSlices;
|
|
654
|
attribs[8*vertex+3] =-1.0f;
|
|
655
|
attribs[8*vertex+4] = side==WEST ? 0.0f : (side==NORTH?-R:R);
|
|
656
|
attribs[8*vertex+5] = (slice==0 ? R : (slice==mSlices ? -R:0) );
|
|
657
|
attribs[8*vertex+6] = (float)(curr.col-slice)/mCols;
|
|
658
|
attribs[8*vertex+7] = 1.0f - y;
|
|
659
|
break;
|
|
660
|
case EAST : y = (float)(back ? (curr.row):(curr.row+1))/mRows;
|
|
661
|
|
|
662
|
attribs[8*vertex ] = (float)(curr.col+1)/mCols -0.5f;
|
|
663
|
attribs[8*vertex+1] = 0.5f - y;
|
|
664
|
attribs[8*vertex+2] = FRONTZ + ((BACKZ-FRONTZ)*slice)/mSlices;
|
|
665
|
attribs[8*vertex+3] = 1.0f;
|
|
666
|
attribs[8*vertex+4] = side==EAST ? 0.0f : (side==SOUTH?-R:R);
|
|
667
|
attribs[8*vertex+5] = (slice==0 ? R : (slice==mSlices ? -R:0) );
|
|
668
|
attribs[8*vertex+6] = (float)(curr.col+1+slice)/mCols;
|
|
669
|
attribs[8*vertex+7] = 1.0f - y;
|
|
670
|
break;
|
|
671
|
}
|
|
672
|
|
|
673
|
if(attribs[8*vertex+6]>1.0f) attribs[8*vertex+6] = 2.0f-attribs[8*vertex+6];
|
|
674
|
if(attribs[8*vertex+6]<0.0f) attribs[8*vertex+6] = -attribs[8*vertex+6];
|
|
675
|
if(attribs[8*vertex+7]>1.0f) attribs[8*vertex+7] = 2.0f-attribs[8*vertex+7];
|
|
676
|
if(attribs[8*vertex+7]<0.0f) attribs[8*vertex+7] = -attribs[8*vertex+7];
|
|
677
|
}
|
|
678
|
|
|
679
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
680
|
|
|
681
|
private void build()
|
|
682
|
{
|
|
683
|
int vertSoFar=0;
|
|
684
|
float[] attribs= new float[(POS_DATA_SIZE+NOR_DATA_SIZE+TEX_DATA_SIZE)*numVertices];
|
|
685
|
|
|
686
|
//android.util.Log.d("MeshCubes","building front grid...");
|
|
687
|
|
|
688
|
vertSoFar = buildFrontBackGrid(true, vertSoFar,attribs);
|
|
689
|
|
|
690
|
if( mSlices>0 )
|
|
691
|
{
|
|
692
|
vertSoFar = repeatLast(vertSoFar,attribs);
|
|
693
|
if( vertSoFar%2==1 )
|
|
694
|
{
|
|
695
|
//android.util.Log.d("MeshCubes","repeating winding1 vertex");
|
|
696
|
|
|
697
|
vertSoFar = repeatLast(vertSoFar,attribs);
|
|
698
|
}
|
|
699
|
|
|
700
|
//android.util.Log.d("MeshCubes","building side grid...");
|
|
701
|
|
|
702
|
vertSoFar = buildSideGrid (vertSoFar,attribs);
|
|
703
|
|
|
704
|
//android.util.Log.d("MeshCubes","building back grid...");
|
|
705
|
|
|
706
|
buildFrontBackGrid (false,vertSoFar,attribs);
|
|
707
|
}
|
|
708
|
|
|
709
|
//android.util.Log.e("MeshCubes", "dataLen="+numVertices);
|
|
710
|
//android.util.Log.d("MeshCubes", "attribs: "+debug(attribs,8) );
|
|
711
|
|
|
712
|
mEdges.clear();
|
|
713
|
mEdges = null;
|
|
714
|
mCubes = null;
|
|
715
|
|
|
716
|
if( remainingVert!=0 )
|
|
717
|
android.util.Log.e("MeshCubes", "remainingVert " +remainingVert );
|
|
718
|
|
|
719
|
mVertAttribs = ByteBuffer.allocateDirect(numVertices*VERTSIZE).order(ByteOrder.nativeOrder()).asFloatBuffer();
|
|
720
|
mVertAttribs.put(attribs).position(0);
|
|
721
|
}
|
|
722
|
|
|
723
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
724
|
// PUBLIC API
|
|
725
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
726
|
/**
|
|
727
|
* Creates the underlying mesh of vertices, normals, texture coords.
|
|
728
|
*
|
|
729
|
* @param cols Integer helping to parse the next parameter.
|
|
730
|
* @param desc String describing the subset of a MxNx1 cuboid that we want to create.
|
|
731
|
* Its MxN characters - all 0 or 1 - decide of appropriate field is taken or not.
|
|
732
|
* <p></p>
|
|
733
|
* <p>
|
|
734
|
* <pre>
|
|
735
|
* For example, (cols=2, desc="111010") describes the following shape:
|
|
736
|
*
|
|
737
|
* XX
|
|
738
|
* X
|
|
739
|
* X
|
|
740
|
*
|
|
741
|
* whereas (cols=2,desc="110001") describes
|
|
742
|
*
|
|
743
|
* XX
|
|
744
|
*
|
|
745
|
* X
|
|
746
|
* </pre>
|
|
747
|
* </p>
|
|
748
|
* @param slices Number of slices, i.e. 'depth' of the Mesh.
|
|
749
|
*/
|
|
750
|
public MeshCubes(int cols, String desc, int slices)
|
|
751
|
{
|
|
752
|
super( (float)slices/cols);
|
|
753
|
prepareDataStructures(cols,desc,slices);
|
|
754
|
build();
|
|
755
|
}
|
|
756
|
|
|
757
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
758
|
/**
|
|
759
|
* Creates a full, hole-less underlying mesh of vertices, normals, texture coords and colors.
|
|
760
|
*
|
|
761
|
* @param cols Number of columns, i.e. 'width' of the Mesh.
|
|
762
|
* @param rows Number of rows, i.e. 'height' of the Mesh.
|
|
763
|
* @param slices Number of slices, i.e. 'depth' of the Mesh.
|
|
764
|
*/
|
|
765
|
public MeshCubes(int cols, int rows, int slices)
|
|
766
|
{
|
|
767
|
super( (float)slices/cols);
|
|
768
|
prepareDataStructures(cols,rows,slices);
|
|
769
|
build();
|
|
770
|
}
|
|
771
|
}
|