Revision adb2661c
Added by Leszek Koltunski almost 8 years ago
| src/main/java/org/distorted/library/DistortedBitmapGrid.java | ||
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| 26 | 26 |
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class DistortedBitmapGrid extends DistortedObjectGrid |
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{
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private int mCols, mRows; |
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private int remainingVert; |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// create a flat, full grid |
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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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private void computeNumberOfVertices(int cols, int rows) |
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{
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//android.util.Log.e("BITMAP","preparing data structures, cols="+cols+" rows="+rows);
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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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mRows =0; |
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mCols =0; |
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dataLength=0; |
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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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if( cols>0 )
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{
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mCols = cols;
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mRows = rows;
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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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dataLength = 2*( mRows*mCols +2*mRows - 1) +2*(mCols>=2 ? mRows:0) + |
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(mCols>=2 && mRows>=2 ? 2*mRows-2 : 1); |
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//////////////////////////////////////////////////////////// |
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// vertex indices |
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//android.util.Log.e("BITMAP","vertices="+dataLength);
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int offset=0; |
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final short[] indexData = new short[dataLength]; |
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remainingVert = dataLength; |
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} |
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} |
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int changePointX = xLength/2; |
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int changePointY = yLength/2; |
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for(int y=0; y<yLength-1; y++) |
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{
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if( y>0 ) |
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{
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if( y<changePointY ) |
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{
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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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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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} |
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if (y<changePointY) |
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{
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for(int x=0; x<xLength; x++) |
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{
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if( x<=changePointX ) |
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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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else |
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{
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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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if( x==changePointX && xLength>2 ) |
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{
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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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} |
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} |
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} |
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else |
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{
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for(int x=0; x<xLength; x++) |
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{
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if( x<=changePointX ) |
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{
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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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if( x==changePointX && xLength>2 ) |
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{
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indexData[offset++] = (short) (((y+1)*xLength)+x); |
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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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} |
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} |
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if (y<changePointY && yLength>2 ) |
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{
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indexData[offset++] = (short) (((y+1)*xLength) + (xLength-1)); |
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} |
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else if(y<yLength-2) |
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{
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indexData[offset++] = (short) ((y *xLength) + (xLength-1)); |
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} |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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//android.util.Log.e("grid", "xLength="+xLength+" yLength="+yLength);
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//for(int g=0; g<dataLength; g++) android.util.Log.e("grid", "index["+g+"]="+indexData[g]);
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private int addVertex(int vertex, int col, int row, float[] position, float[] normal, float[] texture) |
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{
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remainingVert--; |
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////////////////////////////////////////////////////////////
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// texture
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float x= (float)col/mCols;
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float y= (float)row/mRows;
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offset=0; |
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bufferData = new float[TEX_DATA_SIZE*dataLength]; |
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position[3*vertex ] = x-0.5f; |
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position[3*vertex+1] = 0.5f-y; |
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position[3*vertex+2] = 0; |
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for(int i=0; i<dataLength; i++) |
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{
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tmpx = ((float)(indexData[i]%xLength))/(xLength-1); |
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tmpy = ((float)(indexData[i]/xLength))/(yLength-1); |
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texture[2*vertex ] = x; |
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texture[2*vertex+1] = y; |
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bufferData[offset++] = tmpx; // s=x |
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bufferData[offset++] = tmpy; // t=y |
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} |
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mGridTexture = ByteBuffer.allocateDirect(TEX_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer(); |
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mGridTexture.put(bufferData).position(0); |
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normal[3*vertex ] = 0.0f; |
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normal[3*vertex+1] = 0.0f; |
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normal[3*vertex+2] = 1.0f; |
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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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//Log.e("grid", "regWidth="+(2*mRegW)+" regHeight="+(2*mRegH)+" xLength="+xLength+" yLength="+yLength);
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return vertex+1; |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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//////////////////////////////////////////////////////////// |
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// vertex positions |
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private int repeatLast(int vertex, float[] position, float[] normal, float[] texture) |
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{
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remainingVert--; |
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offset=0; |
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bufferData= new float[POSITION_DATA_SIZE*dataLength]; |
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//android.util.Log.e("BITMAP", "repeating last vertex!");
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for(int i=0; i<dataLength; i++)
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{
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tmpx = ((float)(indexData[i]%xLength))/(xLength-1);
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tmpy = ((float)(indexData[i]/xLength))/(yLength-1);
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tmpz = 0;
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if( vertex>0 )
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{
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position[3*vertex ] = position[3*vertex-3];
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position[3*vertex+1] = position[3*vertex-2];
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position[3*vertex+2] = position[3*vertex-1];
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bufferData[offset++] = (tmpx-0.5f); // x
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bufferData[offset++] = (0.5f-tmpy); // y
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bufferData[offset++] = tmpz; // z
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} |
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mGridPositions = ByteBuffer.allocateDirect(POSITION_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
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mGridPositions.put(bufferData).position(0);
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normal[3*vertex ] = normal[3*vertex-3];
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normal[3*vertex+1] = normal[3*vertex-2];
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normal[3*vertex+2] = normal[3*vertex-1];
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texture[2*vertex ] = texture[2*vertex-2];
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texture[2*vertex+1] = texture[2*vertex-1];
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//for(int g=0; g<dataLength; g++) android.util.Log.e("grid", "pos["+g+"]=("+bufferData[3*g]+","+bufferData[3*g+1]+")");
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//////////////////////////////////////////////////////////// |
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// normals |
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vertex++; |
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} |
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offset=0;
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bufferData = new float[NORMAL_DATA_SIZE*dataLength];
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return vertex;
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}
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for(int i=0; i<dataLength; i++) |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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private void buildGrid(float[] position, float[] normal, float[] texture) |
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{
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boolean lastBlockIsNE = false; |
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boolean currentBlockIsNE; |
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int vertex = 0; |
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//android.util.Log.d("BITMAP", "buildGrid");
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for(int row=0; row<mRows; row++) |
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{
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for(int col=0; col<mCols; col++) |
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{
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currentBlockIsNE = (2*row<=mRows-1)^(2*col<=mCols-1); |
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if( col==0 || (lastBlockIsNE^currentBlockIsNE) ) |
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{
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if( row!=0 && col==0 ) vertex = repeatLast(vertex,position,normal,texture); |
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vertex= addVertex( vertex, col, row+(currentBlockIsNE?0:1), position, normal, texture); |
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if( row!=0 && col==0 ) vertex = repeatLast(vertex,position,normal,texture); |
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if( lastBlockIsNE^currentBlockIsNE) vertex = repeatLast(vertex,position,normal,texture); |
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vertex= addVertex( vertex, col, row+(currentBlockIsNE?1:0), position, normal, texture); |
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} |
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vertex= addVertex( vertex, col+1, row+(currentBlockIsNE?0:1), position, normal, texture); |
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vertex= addVertex( vertex, col+1, row+(currentBlockIsNE?1:0), position, normal, texture); |
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lastBlockIsNE = currentBlockIsNE; |
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} |
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} |
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//android.util.Log.d("BITMAP", "buildGrid done");
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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* Creates the underlying grid of vertices, normals and texture coords. |
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* |
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* @param cols Number of columns in the grid. |
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* @param rows Number of rows in the grid. |
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*/ |
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public DistortedBitmapGrid(int cols, int rows) |
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{
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bufferData[offset++] = 0.0f; // x |
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bufferData[offset++] = 0.0f; // y |
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bufferData[offset++] = 1.0f; // z |
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computeNumberOfVertices(cols,rows); |
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float[] positionData= new float[POSITION_DATA_SIZE*dataLength]; |
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float[] normalData = new float[NORMAL_DATA_SIZE *dataLength]; |
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float[] textureData = new float[TEX_DATA_SIZE *dataLength]; |
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buildGrid(positionData,normalData,textureData); |
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/* |
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android.util.Log.e("CUBES","dataLen="+dataLength+" vertex="+numVertices);
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android.util.Log.d("CUBES", "position: "+debug(positionData,3) );
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android.util.Log.d("CUBES", "normal: " +debug( normalData,3) );
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android.util.Log.d("CUBES", "texture: " +debug( textureData,2) );
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*/ |
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android.util.Log.d("BITMAP", "remainingVert " +remainingVert );
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mGridPositions = ByteBuffer.allocateDirect(POSITION_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer(); |
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mGridPositions.put(positionData).position(0); |
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mGridNormals = ByteBuffer.allocateDirect(NORMAL_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer(); |
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mGridNormals.put(normalData).position(0); |
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mGridTexture = ByteBuffer.allocateDirect(TEX_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer(); |
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mGridTexture.put(textureData).position(0); |
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} |
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mGridNormals = ByteBuffer.allocateDirect(NORMAL_DATA_SIZE*dataLength*BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer(); |
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mGridNormals.put(bufferData).position(0); |
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} |
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} |
Also available in: Unified diff
Correctly tesselate the DistortedBitmap target!