Example usage for java.lang Math atan2

Introduction

In this page you can find the example usage for java.lang Math atan2.

Prototype

@HotSpotIntrinsicCandidate
public static double atan2(double y, double x)

Source Link

Document

Returns the angle theta from the conversion of rectangular coordinates ( x , y ) to polar coordinates (r, theta).

Usage

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2PositiveNegative() {
    try {/*  w  ww  .  jav  a  2s. co  m*/
        Expression expression = getExpressionWithFunctionContext("atan2(10,-10)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(10, -10), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.appeaser.sublimepickerlibrary.timepicker.RadialTimePickerView.java

private int getDegreesFromXY(float x, float y, boolean constrainOutside) {
    // Ensure the point is inside the touchable area.
    final int innerBound;
    final int outerBound;
    if (mIs24HourMode && mShowHours) {
        innerBound = mMinDistForInnerNumber;
        outerBound = mMaxDistForOuterNumber;
    } else {//from   w  ww . j  av a 2s .c o  m
        final int index = mShowHours ? HOURS : MINUTES;
        final int center = mCircleRadius - mTextInset[index];
        innerBound = center - mSelectorRadius;
        outerBound = center + mSelectorRadius;
    }

    final double dX = x - mXCenter;
    final double dY = y - mYCenter;
    final double distFromCenter = Math.sqrt(dX * dX + dY * dY);
    if (distFromCenter < innerBound || constrainOutside && distFromCenter > outerBound) {
        return -1;
    }

    // Convert to degrees.
    final int degrees = (int) (Math.toDegrees(Math.atan2(dY, dX) + Math.PI / 2) + 0.5);
    if (degrees < 0) {
        return degrees + 360;
    } else {
        return degrees;
    }
}

From source file:org.navitproject.navit.NavitGraphics.java

protected void draw_image_warp(Paint paint, int count, int p0x, int p0y, int p1x, int p1y, int p2x, int p2y,
        Bitmap bitmap) {/* w w w.  j  av  a2 s  .co  m*/

    float width;
    float scale;
    float deltaY;
    float deltaX;
    float angle;
    Matrix matrix;

    if (count == 3) {
        matrix = new Matrix();
        deltaX = p1x - p0x;
        deltaY = p1y - p0y;
        width = (float) (Math.sqrt((deltaX * deltaX) + (deltaY * deltaY)));
        angle = (float) (Math.atan2(deltaY, deltaX) * 180d / Math.PI);
        scale = width / bitmap.getWidth();
        matrix.preScale(scale, scale);
        matrix.postTranslate(p0x, p0y);
        matrix.postRotate(angle, p0x, p0y);
        draw_canvas.drawBitmap(bitmap, matrix, paint);
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NullNull() {
    try {//from w  w w. ja  v a2  s . c o  m
        Expression expression = getExpressionWithFunctionContext("atan2(0,0)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(0, 0), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NullNinety() {
    try {/*from   ww w . j  a  va2s. c o  m*/
        Expression expression = getExpressionWithFunctionContext("atan2(0,90)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(0, 90), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NinetyNull() {
    try {/*w ww  . j ava  2  s. c  o  m*/
        Expression expression = getExpressionWithFunctionContext("atan2(90,0)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(90, 0), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NinetyNinety() {
    try {// w  w w. j  a  v  a2s  . c  om
        Expression expression = getExpressionWithFunctionContext("atan2(90,90)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(90, 90), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NullPi() {
    try {/*from  w ww  .j  ava 2  s. c  om*/
        Expression expression = getExpressionWithFunctionContext("atan2(0,pi)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(0, Math.PI), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2NinetyPi() {
    try {/*from   ww w. ja v a 2s. c  o m*/
        Expression expression = getExpressionWithFunctionContext("atan2(90,pi)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(90, Math.PI), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}

From source file:com.rapidminer.tools.expression.internal.function.AntlrParserTrigonometricTest.java

@Test
public void atan2PiNull() {
    try {//from   w ww  . ja v  a2  s.  co m
        Expression expression = getExpressionWithFunctionContext("atan2(pi,0)");
        assertEquals(ExpressionType.DOUBLE, expression.getExpressionType());
        assertEquals(Math.atan2(Math.PI, 0), expression.evaluateNumerical(), 1e-15);
    } catch (ExpressionException e) {
        assertNotNull(e.getMessage());
    }
}