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The main module contains the GeoTools public interfaces that are used by other GeoTools modules (and GeoTools applications). Where possible we make use industry standard terms as provided by OGC and ISO standards. The formal GeoTools public api consists of gt-metadata, jts and the gt-main module. The main module contains the default implementations that are available provided to other GeoTools modules using our factory system. Factories are obtained from an appropriate FactoryFinder, giving applications a chance configure the factory used using the Factory Hints facilities. FilterFactory ff = CommonFactoryFinder.getFilterFactory(); Expression expr = ff.add( expression1, expression2 ); If you find yourself using implementation specific classes chances are you doing it wrong: Expression expr = new AddImpl( expression1, expressiom2 );

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.styling;

import org.opengis.filter.expression.Expression;

/**
 * The ShadedRelief element selects the application of relief shading (or ?hill shading?) to an
 * image for a three-dimensional visual effect. It is defined as:
 *
 * 
 * <xs:element name="ShadedRelief">
 *   <xs:complexType>
 *     <xs:sequence>
 *       <xs:element ref="sld:BrightnessOnly" minOccurs="0"/>
 *       <xs:element ref="sld:ReliefFactor" minOccurs="0"/>
 *     </xs:sequence>
 *   </xs:complexType>
 * </xs:element>
 * <xs:element name="BrightnessOnly" type="xs:boolean"/>
 * <xs:element name="ReliefFactor" type="xs:double"/>
 * 
* * Exact parameters of the shading are system-dependent (for now). If the BrightnessOnly flag is ?0? * (false, default), the shading is applied to the layer being rendered as the current RasterSymbol. * If BrightnessOnly is ?1? (true), the shading is applied to the brightness of the colors in the * rendering canvas generated so far by other layers, with the effect of relief-shading these other * layers. The default for BrightnessOnly is ?0? (false). The ReliefFactor gives the amount of * exaggeration to use for the height of the ?hills.? A value of around 55 (times) gives reasonable * results for Earth-based DEMs. The default value is system-dependent. * * @author iant */ public interface ShadedRelief extends org.opengis.style.ShadedRelief { /** * turns brightnessOnly on or off depending on value of flag. * * @param flag boolean */ public void setBrightnessOnly(boolean flag); /** * The ReliefFactor gives the amount of exaggeration to use for the height of the ?hills.? A * value of around 55 (times) gives reasonable results for Earth-based DEMs. The default value * is system-dependent. * * @param reliefFactor an expression which evaluates to a double. */ public void setReliefFactor(Expression reliefFactor); public void accept(org.geotools.styling.StyleVisitor visitor); }




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