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/*
* Copyright (c) 2016, 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.worldwind.tile;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLContext;
import gov.nasa.worldwind.geom.Extent;
import gov.nasa.worldwind.geom.LatLon;
import gov.nasa.worldwind.geom.Sector;
import gov.nasa.worldwind.globes.EllipsoidalGlobe;
import gov.nasa.worldwind.render.DrawContext;
import gov.nasa.worldwind.render.Renderable;
import gov.nasa.worldwind.render.SurfaceTile;
import gov.nasa.worldwind.render.SurfaceTileRenderer;
import gov.nasa.worldwind.util.Logging;
/**
* A SurfaceTile which renders imagery from an OpenGL texture handle.
*
* @author ulman
*/
public class TextureSurfaceTile implements SurfaceTile, Renderable
{
protected int textureHandle;
protected Sector sector;
protected List corners;
protected float scaleX = 1.0f;
protected float scaleY = 1.0f;
protected float opacity = 1.0f;
protected List thisList = Collections.singletonList( this );
protected EllipsoidalGlobe globe;
protected SurfaceTileRenderer renderer;
public TextureSurfaceTile( int textureHandle, Sector sector )
{
this( textureHandle, ( Iterable ) sector );
}
public TextureSurfaceTile( int textureHandle, Iterable corners )
{
this.textureHandle = textureHandle;
this.initializeGeometry( corners );
}
public void setOpacity( double opacity )
{
this.opacity = (float) opacity;
}
public void setSurfaceTileRenderer( SurfaceTileRenderer renderer )
{
this.renderer = renderer;
}
public void setTextureScale( float scaleX, float scaleY )
{
this.scaleX = scaleX;
this.scaleY = scaleY;
}
public float getTextureScaleX( )
{
return this.scaleX;
}
public float getTextureScaleY( )
{
return this.scaleY;
}
public void setCorners( Iterable corners )
{
this.initializeGeometry( corners );
}
protected void initializeGeometry( Iterable corners )
{
this.corners = new ArrayList( 4 );
for ( LatLon ll : corners )
{
this.corners.add( ll );
}
this.sector = Sector.boundingSector( this.corners );
}
/////////////// Renderable methods ///////////////
@Override
public void render( DrawContext dc )
{
GL2 gl = dc.getGL( ).getGL2( );
gl.glPushAttrib( GL2.GL_POLYGON_BIT );
gl.glPolygonMode( GL2.GL_FRONT, GL2.GL_FILL );
gl.glEnable( GL2.GL_CULL_FACE );
gl.glCullFace( GL2.GL_BACK );
SurfaceTileRenderer r = renderer != null ? renderer : dc.getGeographicSurfaceTileRenderer( );
if ( opacity != 1.0f )
{
gl.glEnable( GL2.GL_BLEND );
gl.glBlendFunc( GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA );
gl.glColor4f( 1.0f, 1.0f, 1.0f, opacity );
}
else
{
gl.glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
}
try
{
r.renderTiles( dc, this.thisList );
}
finally
{
gl.glPopAttrib( );
}
}
/////////////// SurfaceTile methods ///////////////
@Override
public boolean bind( DrawContext dc )
{
GL gl = dc.getGL( );
gl.glBindTexture( GL2.GL_TEXTURE_2D, textureHandle );
// these settings make fine line drawing against a transparent background appear much more natural
// but can make other rendering look too jagged/crisp
gl.glTexParameterf( GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_LINEAR );
gl.glTexParameterf( GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_LINEAR );
gl.glTexParameterf( GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_CLAMP_TO_EDGE );
gl.glTexParameterf( GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_CLAMP_TO_EDGE );
gl.glBlendFuncSeparate( GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA, GL2.GL_ONE, GL2.GL_ONE_MINUS_SRC_ALPHA );
gl.glEnable( GL2.GL_BLEND );
//GlimpseColor.glColor( gl, GlimpseColor.getWhite( 0.5f ) );
return true;
}
@Override
public void applyInternalTransform( DrawContext dc, boolean textureIdentityActive )
{
GL2 gl = GLContext.getCurrent( ).getGL( ).getGL2( );
if ( !textureIdentityActive )
{
gl.glMatrixMode( GL2.GL_TEXTURE );
gl.glLoadIdentity( );
}
gl.glScaled( scaleX, scaleY, 1 );
}
@Override
public Sector getSector( )
{
return sector;
}
@Override
public List getCorners( )
{
return corners;
}
@Override
public Extent getExtent( DrawContext dc )
{
if ( dc == null )
{
String msg = Logging.getMessage( "nullValue.DrawContextIsNull" );
Logging.logger( ).severe( msg );
throw new IllegalArgumentException( msg );
}
return Sector.computeBoundingCylinder( dc.getGlobe( ), dc.getVerticalExaggeration( ), this.getSector( ) );
}
}
