Example usage for java.awt.geom AffineTransform TYPE_TRANSLATION

Introduction

In this page you can find the example usage for java.awt.geom AffineTransform TYPE_TRANSLATION.

Prototype

int TYPE_TRANSLATION

To view the source code for java.awt.geom AffineTransform TYPE_TRANSLATION.

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Document

This flag bit indicates that the transform defined by this object performs a translation in addition to the conversions indicated by other flag bits.

Usage

From source file:org.jcurl.core.base.CurveTransformedTest.java

/**
 * Test the transformation from a Rock Coordinates (rc) System at wc(3,3.5)
 * with positive y axis along wc(2,4.2) into World Coordinates (wc). Uses a
 * Point rc(5,1.3) = wc(8,2.5).//  w  w  w  . ja  v a  2  s .  c o m
 */
public void testAffineTransformRotateShift() {
    final Point2D p0_wc = new Point2D.Double(3, 3.5);
    final Rock v0_wc = new RockDouble(2, 4.2, 0.3);
    final double v = v0_wc.distance(0, 0);
    final double[] d = { v0_wc.getY(), -v0_wc.getX(), v0_wc.getX(), v0_wc.getY(), 0, 0 };
    final AffineTransform at = new AffineTransform(d);
    at.scale(1 / v, 1 / v);
    assertEquals(AffineTransform.TYPE_GENERAL_ROTATION + AffineTransform.TYPE_UNIFORM_SCALE, at.getType());
    assertEquals(1.0, at.getDeterminant());
    assertEquals(0.9028605188239303, at.getScaleX());
    assertEquals(at.getScaleX(), at.getScaleY());
    assertEquals(0.42993358039234775, at.getShearX());
    assertEquals(-at.getShearX(), at.getShearY());
    assertEquals(0, at.getTranslateX());
    assertEquals(0, at.getTranslateY());
    Point2D p = null;
    p = at.transform(new Point2D.Double(5, 1.3), null);
    assertEquals("Point2D.Double[5.073216248629703, -0.9759492274906292]", p.toString());

    at.preConcatenate(AffineTransform.getTranslateInstance(p0_wc.getX(), p0_wc.getY()));
    assertEquals(AffineTransform.TYPE_GENERAL_ROTATION + AffineTransform.TYPE_TRANSLATION
            + AffineTransform.TYPE_UNIFORM_SCALE, at.getType());
    assertEquals(1.0, at.getDeterminant());
    assertEquals(0.9028605188239303, at.getScaleX());
    assertEquals(at.getScaleX(), at.getScaleY());
    assertEquals(0.42993358039234775, at.getShearX());
    assertEquals(-at.getShearX(), at.getShearY());
    assertEquals(p0_wc.getX(), at.getTranslateX());
    assertEquals(p0_wc.getY(), at.getTranslateY());

    p = at.transform(new Point2D.Double(5, 1.3), null);
    assertEquals("Point2D.Double[8.073216248629702, 2.524050772509371]", p.toString());
}

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From source file:org.jcurl.core.base.CurveTransformedTest.java

/**
 * Test the transformation from a Rock Coordinates (rc) System at wc(3,3.5)
 * with positive y axis along wc(2,4.2) into World Coordinates (wc). Uses a
 * Point rc(5,1.3) = wc(8,2.5)./*from   w w  w  .j  a  v a  2  s  .c  o  m*/
 * 
 * @see CurveTransformed#createRc2Wc(AffineTransform, Point2D, Point2D)
 */
public void testCreateRc2Wc() {
    final Point2D p0_wc = new Point2D.Double(3, 3.5);
    final Rock v0_wc = new RockDouble(2, 4.2, 0.3);
    final AffineTransform at = CurveTransformed.createRc2Wc(null, p0_wc, v0_wc);
    assertEquals(AffineTransform.TYPE_GENERAL_ROTATION + AffineTransform.TYPE_TRANSLATION, at.getType());
    assertEquals(1.0, at.getDeterminant());
    assertEquals(0.9028605188239303, at.getScaleX());
    assertEquals(at.getScaleX(), at.getScaleY());
    assertEquals(0.42993358039234775, at.getShearX());
    assertEquals(-at.getShearX(), at.getShearY());
    assertEquals(p0_wc.getX(), at.getTranslateX());
    assertEquals(p0_wc.getY(), at.getTranslateY());

    final Point2D rc = new Point2D.Double(5, 1.3);
    final Point2D wc = at.transform(rc, null);
    assertEquals("Point2D.Double[8.073216248629704, 2.524050772509371]", wc.toString());

    // angle in rc:
    double ang = Math.atan2(rc.getY(), rc.getX());
    assertEquals(14.574216198038739, rad2deg(ang));

    // wc rotation:
    ang = Math.atan2(at.getShearY(), at.getScaleY());
    assertEquals(-25.463345061871614, rad2deg(ang));
    final double[] d = new double[6];
    at.getMatrix(d);
    ang = Math.atan2(-d[2], d[3]);
    assertEquals(-25.463345061871614, rad2deg(ang));

    // angle in wc:
    ang = Math.atan2(wc.getY(), wc.getX());
    assertEquals(17.36159358309492, rad2deg(ang));
}

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