/*******************************************************************************
 * Copyright 2010 Simon Mieth
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package org.kabeja.svg.generators;

import java.util.Map;

import org.kabeja.common.DraftEntity;
import org.kabeja.entities.Ray;
import org.kabeja.entities.util.Utils;
import org.kabeja.math.Bounds;
import org.kabeja.math.Point3D;
import org.kabeja.math.TransformContext;
import org.kabeja.svg.SVGConstants;
import org.kabeja.svg.SVGContext;
import org.kabeja.svg.SVGUtils;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;


public class SVGRayGenerator extends AbstractSVGSAXGenerator {
    public void toSAX(ContentHandler handler, Map svgContext, DraftEntity entity,
        TransformContext transformContext) throws SAXException {
        Ray ray = (Ray) entity;
        Bounds b = (Bounds) svgContext.get(SVGContext.DRAFT_BOUNDS);

        // we will create a line, which goes over or to the end of the draft
        // bounds
        double t = Math.sqrt(Math.pow(b.getHeight(), 2) +
                Math.pow(b.getWidth(), 2));

        Point3D end = Utils.getPointFromParameterizedLine(ray.getBasePoint(),
                ray.getDirection(), t);

        AttributesImpl atts = new AttributesImpl();
        SVGUtils.addAttribute(atts, "x1", "" + ray.getBasePoint().getX());
        SVGUtils.addAttribute(atts, "y1", "" + ray.getBasePoint().getY());
        SVGUtils.addAttribute(atts, "x2", "" + end.getX());
        SVGUtils.addAttribute(atts, "y2", "" + end.getY());
        super.setCommonAttributes(atts, svgContext, ray);

        SVGUtils.emptyElement(handler, SVGConstants.SVG_LINE, atts);
    }
}