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/*
* Copyright (c) 2012, Metron, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Metron, Inc. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL METRON, INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.metsci.glimpse.painter.shape;
import java.io.IOException;
import java.nio.FloatBuffer;
import javax.media.opengl.GL;
import com.metsci.glimpse.axis.Axis1D;
import com.metsci.glimpse.gl.attribute.GLFloatBuffer;
import com.metsci.glimpse.gl.attribute.GLFloatBuffer2D;
import com.metsci.glimpse.gl.shader.Pipeline;
import com.metsci.glimpse.plot.timeline.data.Epoch;
import com.metsci.glimpse.util.units.time.TimeStamp;
/**
* A Scatterplot point painter which associates a time with each data point. A subset of
* the points can be displayed based on these time values.
*
* @author ulman
*/
public class TimeShadedPointPainter extends ShadedPointPainter
{
protected FloatBuffer timeAttributeBuffer;
protected float startTime = Float.NEGATIVE_INFINITY;
protected float endTime = Float.POSITIVE_INFINITY;
protected int startIndex;
protected int endIndex;
public TimeShadedPointPainter( Axis1D colorAxis, Axis1D sizeAxis, Pipeline pipeline ) throws IOException
{
super( colorAxis, sizeAxis, pipeline );
}
public TimeShadedPointPainter( Axis1D colorAxis, Axis1D sizeAxis ) throws IOException
{
super( colorAxis, sizeAxis );
}
/**
* Sets the selected range of times which will be displayed by this painter. The Epoch
* argument is used to convert from absolute TimeStamps to relative times. It is generally
* provided by a {@ StackedTimePlot2D}. The same Epoch should be used to fill the point
* time values in the data buffer passed to {@code #useTimeAttribData(FloatBuffer)}.
*/
public void displayTimeRange( Epoch epoch, TimeStamp startTime, TimeStamp endTime )
{
displayTimeRange( epoch.fromTimeStamp( startTime ), epoch.fromTimeStamp( endTime ) );
}
/**
* Sets the selected range of times which will be displayed by this painter. Times should generally
* be provided via {@code Epoch#fromTimeStamp(TimeStamp)}.
*/
public void displayTimeRange( double startTime, double endTime )
{
lock.lock( );
try
{
this.startTime = (float) startTime;
this.endTime = (float) endTime;
updateSelectedTime( );
}
finally
{
lock.unlock( );
}
}
/**
* Assigns a time value to each point painted by the time painter. Points
* must be added in increasing time order for time selection to function.
*/
public void useTimeAttribData( FloatBuffer attributeBuffer )
{
lock.lock( );
try
{
this.timeAttributeBuffer = attributeBuffer;
this.updateSelectedTime( );
}
finally
{
lock.unlock( );
}
}
public void useVertexPositionData( GLFloatBuffer2D positionBuffer )
{
lock.lock( );
try
{
super.useVertexPositionData( positionBuffer );
updateSelectedTime( );
}
finally
{
lock.unlock( );
}
}
public void useColorAttribData( GLFloatBuffer attributeBuffer )
{
lock.lock( );
try
{
super.useColorAttribData( attributeBuffer );
updateSelectedTime( );
}
finally
{
lock.unlock( );
}
}
public void useSizeAttribData( GLFloatBuffer attributeBuffer )
{
lock.lock( );
try
{
super.useSizeAttribData( attributeBuffer );
updateSelectedTime( );
}
finally
{
lock.unlock( );
}
}
protected void updateSelectedTime( )
{
if ( timeAttributeBuffer != null )
{
startIndex = binarySearch0( timeAttributeBuffer, 0, timeAttributeBuffer.limit( ), startTime );
if ( startIndex < 0 ) {
// index of the first element > startTime (inclusive lower index)
startIndex = - ( startIndex + 1 );
if ( startIndex >= timeAttributeBuffer.limit( ) ) {
startIndex = 0;
endIndex = 0;
return;
}
} else {
startIndex = firstIndex0( timeAttributeBuffer, startIndex, startTime );
}
endIndex = binarySearch0( timeAttributeBuffer, 0, timeAttributeBuffer.limit( ), endTime );
if ( endIndex < 0 ) {
// index of the first element > endTime (exclusive upper index)
endIndex = - ( endIndex + 1 );
if ( endIndex <= 0 ) {
startIndex = 0;
endIndex = 0;
return;
}
} else {
endIndex = lastIndex0( timeAttributeBuffer, endIndex, endTime ) + 1;
}
}
else if ( positionBuffer != null )
{
startIndex = 0;
endIndex = positionBuffer.getNumVertices( );
}
}
private static int lastIndex0( FloatBuffer b, int startIndex, float key )
{
for ( int i = startIndex ; i < b.limit( ) ; i++ )
{
if ( b.get( i ) != key ) return i-1;
}
return b.limit( )-1;
}
private static int firstIndex0( FloatBuffer b, int startIndex, float key )
{
for ( int i = startIndex ; i >= 0 ; i-- )
{
if ( b.get( i ) != key ) return i+1;
}
return 0;
}
// java.util.Arrays.binarySearch0() modified to work with FloatBuffer
private static int binarySearch0( FloatBuffer b, int fromIndex, int toIndex, float key )
{
int low = fromIndex;
int high = toIndex - 1;
while ( low <= high )
{
int mid = ( low + high ) >>> 1;
float midVal = b.get( mid );
if ( midVal < key )
low = mid + 1;
else if ( midVal > key )
high = mid - 1;
else
return mid; // key found
}
return - ( low + 1 ); // key not found.
}
@Override
protected void drawArrays( GL gl )
{
gl.glDrawArrays( GL.GL_POINTS, startIndex, endIndex - startIndex );
}
}
