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BoofCV is an open source Java library for real-time computer vision and robotics applications.

There is a newer version: 1.1.7

/*
 * Copyright (c) 2011-2020, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * 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 boofcv.visualize;

import lombok.Getter;
import lombok.Setter;

/**
 * A point cloud colorizer where the color pattern repeats periodically. The pattern can be offset and scaled
 *
 * @author Peter Abeles
 */
public abstract class PeriodicColorizer implements PointCloudViewer.Colorizer {
	// the period. This will be in the same units as the point
	@Getter @Setter double period;
	// offset scale. Scale relative to the period.
	@Getter @Setter double offset;

	protected PeriodicColorizer(double period, double offset) {
		this.period = period;
		this.offset = offset;
	}

	protected PeriodicColorizer() {}

	final double triangleWave(double value ) {
		return 2.0*Math.abs(offset+value/period - Math.floor(offset+value/period + 0.5));
	}
	final double triangleWave(double value , double period) {
		return 2.0*Math.abs(offset+value/period - Math.floor(offset+value/period + 0.5));
	}

	public PeriodicColorizer fperiod(double period) {
		this.period = period;
		return this;
	}

	public PeriodicColorizer foffset(double offset) {
		this.offset = offset;
		return this;
	}
}