This returns an affine transform which will keep the center point in the center and scale the x- and y-directions uniformly by the factor given. - Java 2D Graphics

Java examples for 2D Graphics:Transform

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Description

This returns an affine transform which will keep the center point in the center and scale the x- and y-directions uniformly by the factor given.

Demo Code


//package com.java2s;

import java.awt.geom.AffineTransform;

public class Main {


    /**/*w w  w . j a  v  a2s .c  o m*/
     * This returns an affine transform which will keep the center point in
     * the center and scale the x- and y-directions uniformly by the factor
     * given.  Note that a value of 1 corresponds to the identify transform,
     * values less than 1 will "zoom out," and values greater than 1 will
     * "zoom in."  (NOTE: that this transform should be pre-concatenated with
     * the existing one!) */
    public static AffineTransform getZoomTransform(double zoomFactor,
            int width, int height) {
        double tx = width / 2. * (1. - zoomFactor);
        double ty = height / 2. * (1 - zoomFactor);
        return new AffineTransform(zoomFactor, 0., 0., zoomFactor, tx, ty);
    }
}

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