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26 |
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27 |
class DistortedBitmapGrid extends DistortedObjectGrid
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28 |
{
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29 |
private int mCols, mRows;
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30 |
private int remainingVert;
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31 |
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32 |
///////////////////////////////////////////////////////////////////////////////////////////////////
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33 |
// create a flat, full grid
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34 |
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DistortedBitmapGrid(int xLength, int yLength)
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{
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float tmpx,tmpy,tmpz;
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float[] bufferData;
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35 |
private void computeNumberOfVertices(int cols, int rows)
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36 |
{
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37 |
//android.util.Log.e("BITMAP","preparing data structures, cols="+cols+" rows="+rows);
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38 |
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dataLength = 2*xLength*(yLength-1) // (yLength-1) strips, 2*xLength triangles in each,
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+2*(yLength-2); // plus 2 degenerate triangles per each of (yLength-2) joins
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39 |
mRows =0;
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40 |
mCols =0;
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41 |
dataLength=0;
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42 |
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if( xLength>2 )
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{
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dataLength += 3*(yLength-1); // we change direction of triangles midway through each row (+3 triangles per row)
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dataLength += (yLength-2); // we also need to change direction when pulling back to the left (+1 extra triangle)
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43 |
if( cols>0 )
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44 |
{
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45 |
mCols = cols;
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46 |
mRows = rows;
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47 |
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if( yLength>2 )
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dataLength -= 1; // but if we do a vertical triangle direction shift as well, then one of the 'pull backs'
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// does not have to add an extra triangle.
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}
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48 |
dataLength = 2*( mRows*mCols +2*mRows - 1) +2*(mCols>=2 ? mRows:0) +
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49 |
(mCols>=2 && mRows>=2 ? 2*mRows-2 : 1);
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50 |
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////////////////////////////////////////////////////////////
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// vertex indices
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51 |
//android.util.Log.e("BITMAP","vertices="+dataLength);
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52 |
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int offset=0;
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final short[] indexData = new short[dataLength];
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53 |
remainingVert = dataLength;
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54 |
}
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55 |
}
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56 |
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int changePointX = xLength/2;
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int changePointY = yLength/2;
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57 |
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| 59 |
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for(int y=0; y<yLength-1; y++)
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{
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| 61 |
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if( y>0 )
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| 62 |
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{
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| 63 |
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if( y<changePointY )
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{
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| 65 |
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indexData[offset++] = (short) ((y+1)*xLength);
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if( xLength>2 )
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indexData[offset++] = (short) ((y+1)*xLength);
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}
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else
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{
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| 71 |
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indexData[offset++] = (short) (y*xLength);
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if( xLength>2 && y!=changePointY)
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indexData[offset++] = (short) (y*xLength);
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}
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| 75 |
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}
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| 77 |
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if (y<changePointY)
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{
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| 79 |
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for(int x=0; x<xLength; x++)
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| 80 |
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{
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| 81 |
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if( x<=changePointX )
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| 82 |
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{
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| 83 |
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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indexData[offset++] = (short) (( y *xLength)+x);
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| 85 |
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}
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| 86 |
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else
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{
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| 88 |
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indexData[offset++] = (short) (( y *xLength)+x);
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| 89 |
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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| 90 |
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}
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if( x==changePointX && xLength>2 )
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{
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| 94 |
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indexData[offset++] = (short) (( y *xLength)+x);
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indexData[offset++] = (short) (( y *xLength)+x);
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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| 97 |
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}
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| 98 |
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}
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| 99 |
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}
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else
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{
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| 102 |
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for(int x=0; x<xLength; x++)
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{
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| 104 |
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if( x<=changePointX )
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{
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| 106 |
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indexData[offset++] = (short) (( y *xLength)+x);
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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}
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else
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{
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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indexData[offset++] = (short) (( y *xLength)+x);
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}
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| 115 |
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if( x==changePointX && xLength>2 )
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| 116 |
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{
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| 117 |
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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| 118 |
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indexData[offset++] = (short) (((y+1)*xLength)+x);
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| 119 |
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indexData[offset++] = (short) (( y *xLength)+x);
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| 120 |
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}
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| 121 |
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}
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| 122 |
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}
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| 123 |
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| 124 |
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if (y<changePointY && yLength>2 )
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{
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| 126 |
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indexData[offset++] = (short) (((y+1)*xLength) + (xLength-1));
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| 127 |
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}
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| 128 |
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else if(y<yLength-2)
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{
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| 130 |
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indexData[offset++] = (short) ((y *xLength) + (xLength-1));
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| 131 |
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}
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| 132 |
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}
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58 |
///////////////////////////////////////////////////////////////////////////////////////////////////
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59 |
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| 134 |
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//android.util.Log.e("grid", "xLength="+xLength+" yLength="+yLength);
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| 135 |
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//for(int g=0; g<dataLength; g++) android.util.Log.e("grid", "index["+g+"]="+indexData[g]);
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60 |
private int addVertex(int vertex, int col, int row, float[] position, float[] normal, float[] texture)
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61 |
{
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62 |
remainingVert--;
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63 |
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| 137 |
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////////////////////////////////////////////////////////////
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| 138 |
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// texture
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64 |
float x= (float)col/mCols;
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65 |
float y= (float)row/mRows;
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| 139 |
66 |
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| 140 |
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offset=0;
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| 141 |
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bufferData = new float[TEX_DATA_SIZE*dataLength];
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67 |
position[3*vertex ] = x-0.5f;
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68 |
position[3*vertex+1] = 0.5f-y;
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69 |
position[3*vertex+2] = 0;
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| 142 |
70 |
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| 143 |
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for(int i=0; i<dataLength; i++)
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| 144 |
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{
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| 145 |
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tmpx = ((float)(indexData[i]%xLength))/(xLength-1);
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| 146 |
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tmpy = ((float)(indexData[i]/xLength))/(yLength-1);
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71 |
texture[2*vertex ] = x;
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72 |
texture[2*vertex+1] = y;
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| 147 |
73 |
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| 148 |
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bufferData[offset++] = tmpx; // s=x
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| 149 |
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bufferData[offset++] = tmpy; // t=y
|
| 150 |
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}
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| 151 |
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mGridTexture = ByteBuffer.allocateDirect(TEX_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
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| 152 |
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mGridTexture.put(bufferData).position(0);
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74 |
normal[3*vertex ] = 0.0f;
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75 |
normal[3*vertex+1] = 0.0f;
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76 |
normal[3*vertex+2] = 1.0f;
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| 153 |
77 |
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| 154 |
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//for(int g=0; g<dataLength; g++) Log.e("grid", "tex["+g+"]=("+bufferData[2*g]+","+bufferData[2*g+1]+")");
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| 155 |
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//Log.e("grid", "regWidth="+(2*mRegW)+" regHeight="+(2*mRegH)+" xLength="+xLength+" yLength="+yLength);
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78 |
return vertex+1;
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|
79 |
}
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|
80 |
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 156 |
81 |
|
| 157 |
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////////////////////////////////////////////////////////////
|
| 158 |
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// vertex positions
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82 |
private int repeatLast(int vertex, float[] position, float[] normal, float[] texture)
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|
83 |
{
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|
84 |
remainingVert--;
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| 159 |
85 |
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| 160 |
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offset=0;
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| 161 |
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bufferData= new float[POSITION_DATA_SIZE*dataLength];
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86 |
//android.util.Log.e("BITMAP", "repeating last vertex!");
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| 162 |
87 |
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| 163 |
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for(int i=0; i<dataLength; i++)
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| 164 |
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{
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| 165 |
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tmpx = ((float)(indexData[i]%xLength))/(xLength-1);
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| 166 |
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tmpy = ((float)(indexData[i]/xLength))/(yLength-1);
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| 167 |
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tmpz = 0;
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|
88 |
if( vertex>0 )
|
|
89 |
{
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|
90 |
position[3*vertex ] = position[3*vertex-3];
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|
91 |
position[3*vertex+1] = position[3*vertex-2];
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|
92 |
position[3*vertex+2] = position[3*vertex-1];
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| 168 |
93 |
|
| 169 |
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bufferData[offset++] = (tmpx-0.5f); // x
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| 170 |
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bufferData[offset++] = (0.5f-tmpy); // y
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| 171 |
|
bufferData[offset++] = tmpz; // z
|
| 172 |
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}
|
| 173 |
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mGridPositions = ByteBuffer.allocateDirect(POSITION_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
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| 174 |
|
mGridPositions.put(bufferData).position(0);
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94 |
normal[3*vertex ] = normal[3*vertex-3];
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95 |
normal[3*vertex+1] = normal[3*vertex-2];
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|
96 |
normal[3*vertex+2] = normal[3*vertex-1];
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|
97 |
|
|
98 |
texture[2*vertex ] = texture[2*vertex-2];
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|
99 |
texture[2*vertex+1] = texture[2*vertex-1];
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| 175 |
100 |
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| 176 |
|
//for(int g=0; g<dataLength; g++) android.util.Log.e("grid", "pos["+g+"]=("+bufferData[3*g]+","+bufferData[3*g+1]+")");
|
| 177 |
|
|
| 178 |
|
////////////////////////////////////////////////////////////
|
| 179 |
|
// normals
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|
101 |
vertex++;
|
|
102 |
}
|
| 180 |
103 |
|
| 181 |
|
offset=0;
|
| 182 |
|
bufferData = new float[NORMAL_DATA_SIZE*dataLength];
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|
104 |
return vertex;
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|
105 |
}
|
| 183 |
106 |
|
| 184 |
|
for(int i=0; i<dataLength; i++)
|
|
107 |
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
108 |
|
|
109 |
private void buildGrid(float[] position, float[] normal, float[] texture)
|
|
110 |
{
|
|
111 |
boolean lastBlockIsNE = false;
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|
112 |
boolean currentBlockIsNE;
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|
113 |
int vertex = 0;
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|
114 |
|
|
115 |
//android.util.Log.d("BITMAP", "buildGrid");
|
|
116 |
|
|
117 |
for(int row=0; row<mRows; row++)
|
|
118 |
{
|
|
119 |
for(int col=0; col<mCols; col++)
|
|
120 |
{
|
|
121 |
currentBlockIsNE = (2*row<=mRows-1)^(2*col<=mCols-1);
|
|
122 |
|
|
123 |
if( col==0 || (lastBlockIsNE^currentBlockIsNE) )
|
|
124 |
{
|
|
125 |
if( row!=0 && col==0 ) vertex = repeatLast(vertex,position,normal,texture);
|
|
126 |
vertex= addVertex( vertex, col, row+(currentBlockIsNE?0:1), position, normal, texture);
|
|
127 |
if( row!=0 && col==0 ) vertex = repeatLast(vertex,position,normal,texture);
|
|
128 |
if( lastBlockIsNE^currentBlockIsNE) vertex = repeatLast(vertex,position,normal,texture);
|
|
129 |
vertex= addVertex( vertex, col, row+(currentBlockIsNE?1:0), position, normal, texture);
|
|
130 |
}
|
|
131 |
vertex= addVertex( vertex, col+1, row+(currentBlockIsNE?0:1), position, normal, texture);
|
|
132 |
vertex= addVertex( vertex, col+1, row+(currentBlockIsNE?1:0), position, normal, texture);
|
|
133 |
|
|
134 |
lastBlockIsNE = currentBlockIsNE;
|
|
135 |
}
|
|
136 |
}
|
|
137 |
|
|
138 |
//android.util.Log.d("BITMAP", "buildGrid done");
|
|
139 |
}
|
|
140 |
|
|
141 |
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
142 |
|
|
143 |
/**
|
|
144 |
* Creates the underlying grid of vertices, normals and texture coords.
|
|
145 |
*
|
|
146 |
* @param cols Number of columns in the grid.
|
|
147 |
* @param rows Number of rows in the grid.
|
|
148 |
*/
|
|
149 |
public DistortedBitmapGrid(int cols, int rows)
|
| 185 |
150 |
{
|
| 186 |
|
bufferData[offset++] = 0.0f; // x
|
| 187 |
|
bufferData[offset++] = 0.0f; // y
|
| 188 |
|
bufferData[offset++] = 1.0f; // z
|
|
151 |
computeNumberOfVertices(cols,rows);
|
|
152 |
|
|
153 |
float[] positionData= new float[POSITION_DATA_SIZE*dataLength];
|
|
154 |
float[] normalData = new float[NORMAL_DATA_SIZE *dataLength];
|
|
155 |
float[] textureData = new float[TEX_DATA_SIZE *dataLength];
|
|
156 |
|
|
157 |
buildGrid(positionData,normalData,textureData);
|
|
158 |
|
|
159 |
/*
|
|
160 |
android.util.Log.e("CUBES","dataLen="+dataLength+" vertex="+numVertices);
|
|
161 |
android.util.Log.d("CUBES", "position: "+debug(positionData,3) );
|
|
162 |
android.util.Log.d("CUBES", "normal: " +debug( normalData,3) );
|
|
163 |
android.util.Log.d("CUBES", "texture: " +debug( textureData,2) );
|
|
164 |
*/
|
|
165 |
|
|
166 |
android.util.Log.d("BITMAP", "remainingVert " +remainingVert );
|
|
167 |
|
|
168 |
mGridPositions = ByteBuffer.allocateDirect(POSITION_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
|
|
169 |
mGridPositions.put(positionData).position(0);
|
|
170 |
|
|
171 |
mGridNormals = ByteBuffer.allocateDirect(NORMAL_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
|
|
172 |
mGridNormals.put(normalData).position(0);
|
|
173 |
|
|
174 |
mGridTexture = ByteBuffer.allocateDirect(TEX_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
|
|
175 |
mGridTexture.put(textureData).position(0);
|
| 189 |
176 |
}
|
| 190 |
|
mGridNormals = ByteBuffer.allocateDirect(NORMAL_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
|
| 191 |
|
mGridNormals.put(bufferData).position(0);
|
| 192 |
|
}
|
| 193 |
177 |
}
|
Correctly tesselate the DistortedBitmap target!