eu.hansolo.fx.geometry.BezierCurveIterator Maven / Gradle / Ivy

Go to download
/*
 * Copyright (c) 2017 by Gerrit Grunwald
 *
 * 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 eu.hansolo.fx.geometry;

import eu.hansolo.fx.geometry.Path.WindingRule;
import eu.hansolo.fx.geometry.transform.BaseTransform;

import java.util.NoSuchElementException;


class BezierCurveIterator implements PathIterator {
    BezierCurve   bezierCurve;
    BaseTransform transform;
    int           index;


    BezierCurveIterator(BezierCurve bezierCurve, BaseTransform transform) {
        this.bezierCurve = bezierCurve;
        this.transform   = transform;
    }


    public boolean isDone() {
        return (index > 1);
    }

    public void next() {
        ++index;
    }

    public WindingRule getWindingRule() { return WindingRule.WIND_NON_ZERO; }

    public int currentSegment(final double[] COORDS) {
        if (isDone()) { throw new NoSuchElementException("bezierCurve iterator iterator out of bounds"); }
        int type;
        if (index == 0) {
            COORDS[0] = bezierCurve.x1;
            COORDS[1] = bezierCurve.y1;
            type = MOVE_TO;
        } else {
            COORDS[0] = bezierCurve.ctrlx1;
            COORDS[1] = bezierCurve.ctrly1;
            COORDS[2] = bezierCurve.ctrlx2;
            COORDS[3] = bezierCurve.ctrly2;
            COORDS[4] = bezierCurve.x2;
            COORDS[5] = bezierCurve.y2;
            type = BEZIER_TO;
        }
        if (transform != null) { transform.transform(COORDS, 0, COORDS, 0, index == 0 ? 1 : 3); }
        return type;
    }
}