draw Wave - Java 2D Graphics

Java examples for 2D Graphics:Graphics

  1. HOME
  2. Java
  3. 2D Graphics
  4. Graphics

Description

draw Wave

Demo Code

/*// w  w  w .j  a  va2 s.  co m
 * Copyright 2003-2011 JetBrains s.r.o.
 *
 * 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 com.java2s;
import java.awt.*;
import java.awt.image.BufferedImage;

public class Main {
    public static final int WAVE_HEIGHT = 2;
    public static final int WAVE_SEGMENT_LENGTH = WAVE_HEIGHT * 2;

    public static void drawWave(Graphics g, int xStart, int xEnd, int y) {
        int offset = xStart % WAVE_SEGMENT_LENGTH;

        Graphics gc = g.create();
        gc.translate(xStart - offset, y);

        Graphics2D g2d = (Graphics2D) gc;
        Paint oldPaint = g2d.getPaint();
        g2d.setPaint(createPaintForLine(g.getColor()));
        g2d.fillRect(0, 0, xEnd - xStart + offset, WAVE_HEIGHT + 1);
        g2d.setPaint(oldPaint);
    }

    private static TexturePaint createPaintForLine(Color c) {
        BufferedImage image = new BufferedImage(WAVE_SEGMENT_LENGTH,
                WAVE_HEIGHT + 1, BufferedImage.TYPE_INT_ARGB);
        Graphics g = image.getGraphics();
        g.setColor(new Color(0, 0, 0, 0));
        g.fillRect(0, 0, image.getWidth(), image.getHeight());
        g.setColor(c);
        drawWaveSegment(g, 0, 0);
        return new TexturePaint(image, new Rectangle(0, 0,
                image.getWidth(), image.getHeight()));
    }

    public static void drawWaveSegment(Graphics g, int x, int y) {
        g.drawLine(x, y + WAVE_HEIGHT, x + WAVE_SEGMENT_LENGTH / 2, y);
        g.drawLine(x + WAVE_SEGMENT_LENGTH / 2, y, x + WAVE_SEGMENT_LENGTH,
                y + WAVE_HEIGHT);
    }
}

Related Tutorials