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Revision 951c4af9

Added by Leszek Koltunski almost 9 years ago

ID 951c4af9fb776e03a72c0c23827da0b8f79fe484
Parent e7a4ef16
Child 2f20ae3a

Around the World: moving the selection rectangle

     class AroundTheWorldRendererPicker implements GLSurfaceView.Renderer
+      {
     	private static final int BYTES_PER_FLOAT    = 4;
     	private static final int STRIDE_BYTES       = 7 * BYTES_PER_FLOAT;
     	private static final int POSITION_OFFSET    = 0;
     	private static final int POSITION_DATA_SIZE = 3;
     	private static final int COLOR_OFFSET       = 3;
     	private static final int COLOR_DATA_SIZE    = 4;
       private float[] mModelMatrix      = new float[16];
     	private float[] mViewMatrix       = new float[16];
     	private float[] mProjectionMatrix = new float[16];
     	private float[] mMVPMatrix        = new float[16];
     	private float[] mMVPTriangleMatrix= new float[16];
       private float[] mMVPSquareMatrix  = new float[16];
     	private final FloatBuffer mTriangleVertices;
     	private final FloatBuffer mTriangleVert, mSquareVert;
       private int mMVPMatrixH;
       private int mPositionH;
     	private int mColorH;
     	private final int mBytesPerFloat    = 4;
     	private final int mStrideBytes      = 7 * mBytesPerFloat;
     	private final int mPositionOffset   = 0;
     	private final int mPositionDataSize = 3;
     	private final int mColorOffset      = 3;
     	private final int mColorDataSize    = 4;
       private int mHeight, mWidth;
     ///////////////////////////////////////////////////////////////////////////////////////////////////
     	AroundTheWorldRendererPicker()
+    	  {
     		final float[] triangle1VerticesData = {
     				      -0.865f, 1.5f, 0.0f,      // x,y,z
 .0f, 1.0f, 1.0f, 1.0f,   // r,g,b
     	  Matrix.setIdentityM(mModelMatrix, 0);
     	            -0.865f,-1.5f, 0.0f,
 .0f, 0.0f, 0.0f, 1.0f,
     		final float[] triangleVertData = {
     				      -0.865f, 1.5f, 0.0f,    1.0f, 1.0f, 1.0f, 1.0f,   // x,y,z,  r,g,b,a
     	            -0.865f,-1.5f, 0.0f,    0.0f, 0.0f, 0.0f, 1.0f,
 .730f, 0.0f, 0.0f,    0.5f, 0.5f, 0.0f, 1.0f };
 .73f, 0.0f, 0.0f,
 .5f, 0.5f, 0.0f, 1.0f };
     		mTriangleVert = ByteBuffer.allocateDirect(triangleVertData.length * BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
         mTriangleVert.put(triangleVertData).position(0);
     		mTriangleVertices = ByteBuffer.allocateDirect(triangle1VerticesData.length * mBytesPerFloat).order(ByteOrder.nativeOrder()).asFloatBuffer();
         mTriangleVertices.put(triangle1VerticesData).position(0);
         final float[] squareVertData = {
     				      -0.15f, 0.15f, 0.0f,    1.0f, 0.0f, 0.0f, 1.0f,
     	            -0.15f,-0.15f, 0.0f,    1.0f, 0.0f, 0.0f, 1.0f,
 .15f, 0.15f, 0.0f,    1.0f, 0.0f, 0.0f, 1.0f,
 .15f,-0.15f, 0.0f,    1.0f, 0.0f, 0.0f, 1.0f };
     		mSquareVert = ByteBuffer.allocateDirect(squareVertData.length * BYTES_PER_FLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();
         mSquareVert.put(squareVertData).position(0);
+    	  }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       public void move(float x, float y)
+    		{
     		mModelMatrix[12] = x;
     		mModelMatrix[13] = y;
+    		}
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       public int getHeight()
+    		{
     		return mHeight;
+    		}
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       public int getWidth()
+    		{
     		return mWidth;
+    		}
     ///////////////////////////////////////////////////////////////////////////////////////////////////
     	@Override public void onSurfaceCreated(GL10 glUnused, EGLConfig config)
-...
     	@Override public void onSurfaceChanged(GL10 glUnused, int width, int height)
+    	  {
     	  mHeight = height;
     	  mWidth  = width;
     		GLES20.glViewport(0, 0, width, height);
     		final float ratio  = (float) width / height;
-...
     		final float far    = 2.0f;
     		Matrix.frustumM(mProjectionMatrix, 0, left, right, bottom, top, near, far);
     		Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mViewMatrix, 0);
     		Matrix.multiplyMM(mMVPTriangleMatrix, 0, mProjectionMatrix, 0, mViewMatrix, 0);
+    	  }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
-...
     	@Override public void onDrawFrame(GL10 glUnused)
+    	  {
     		GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
         GLES20.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPTriangleMatrix, 0);
         mTriangleVertices.position(mPositionOffset);
         GLES20.glVertexAttribPointer(mPositionH, mPositionDataSize, GLES20.GL_FLOAT, false, mStrideBytes, mTriangleVertices);
         ///////// 'white-black-yellow' triangle //////
         mTriangleVert.position(POSITION_OFFSET);
         GLES20.glVertexAttribPointer(mPositionH, POSITION_DATA_SIZE, GLES20.GL_FLOAT, false, STRIDE_BYTES, mTriangleVert);
         GLES20.glEnableVertexAttribArray(mPositionH);
         mTriangleVert.position(COLOR_OFFSET);
         GLES20.glVertexAttribPointer(mColorH, COLOR_DATA_SIZE, GLES20.GL_FLOAT, false, STRIDE_BYTES, mTriangleVert);
         GLES20.glEnableVertexAttribArray(mColorH);
         mTriangleVertices.position(mColorOffset);
         GLES20.glVertexAttribPointer(mColorH, mColorDataSize, GLES20.GL_FLOAT, false, mStrideBytes, mTriangleVertices);
     		GLES20.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPTriangleMatrix, 0);
     		GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 3);
         //////// 'current position' square ///////////
         mSquareVert.position(POSITION_OFFSET);
         GLES20.glVertexAttribPointer(mPositionH, POSITION_DATA_SIZE, GLES20.GL_FLOAT, false, STRIDE_BYTES, mSquareVert);
         GLES20.glEnableVertexAttribArray(mPositionH);
         mSquareVert.position(COLOR_OFFSET);
         GLES20.glVertexAttribPointer(mColorH, COLOR_DATA_SIZE, GLES20.GL_FLOAT, false, STRIDE_BYTES, mSquareVert);
         GLES20.glEnableVertexAttribArray(mColorH);
     		GLES20.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPMatrix, 0);
         GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 3);
         Matrix.multiplyMM(mMVPSquareMatrix, 0, mViewMatrix, 0, mModelMatrix, 0);
         Matrix.multiplyMM(mMVPSquareMatrix, 0, mProjectionMatrix, 0, mMVPSquareMatrix, 0);
         GLES20.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPSquareMatrix, 0);
     		GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0,4);
+    	  }
+      }

           int x = (int)event.getX();
           int y = (int)event.getY();
           android.util.Log.e("Picker", "touched at x="+x+" y="+y);
           int h = mRenderer.getHeight();
           int w = mRenderer.getWidth();
           float xf = (x-w/2)*3.0f/h;
           float yf =-(y-h/2)*3.0f/h;
           if( yf>-1.5f && yf<1.5f )
+            {
             if( yf>=0 && yf> 1-0.577f*xf )
+              {
               float d = 0.577f*xf + yf;
               yf /= d;
               xf /= d;
+              }
             else if( yf<=0 && yf< 0.577f*xf-1 )
+              {
               float d = 0.577f*xf - yf;
               yf /= d;
               xf /= d;
+              }
             else if( xf< -0.865f )
+              {
               yf *= (-0.865f/xf);
               xf  =  -0.865f;
+              }
             mRenderer.move(xf,yf);
+            }
           return true;
+          }

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Distorted Android

Revision 951c4af9

Added by Leszek Koltunski almost 9 years ago