Example usage for java.awt.geom Arc2D getCenterX

Introduction

In this page you can find the example usage for java.awt.geom Arc2D getCenterX.

Prototype

public double getCenterX() 

Source Link

Document

Returns the X coordinate of the center of the framing rectangle of the Shape in double precision.

Usage

From source file:ExtendedGeneralPath.java

/**
 * Adds an elliptical arc, defined by two radii, an angle from the
 * x-axis, a flag to choose the large arc or not, a flag to
 * indicate if we increase or decrease the angles and the final
 * point of the arc./*from   www.  j  ava  2  s  .c  o m*/
 *
 * @param rx the x radius of the ellipse
 * @param ry the y radius of the ellipse
 *
 * @param angle the angle from the x-axis of the current
 * coordinate system to the x-axis of the ellipse in degrees.
 *
 * @param largeArcFlag the large arc flag. If true the arc
 * spanning less than or equal to 180 degrees is chosen, otherwise
 * the arc spanning greater than 180 degrees is chosen
 *
 * @param sweepFlag the sweep flag. If true the line joining
 * center to arc sweeps through decreasing angles otherwise it
 * sweeps through increasing angles
 *
 * @param x the absolute x coordinate of the final point of the arc.
 * @param y the absolute y coordinate of the final point of the arc.
 */
public synchronized void arcTo(float rx, float ry, float angle, boolean largeArcFlag, boolean sweepFlag,
        float x, float y) {

    // Ensure radii are valid
    if (rx == 0 || ry == 0) {
        lineTo(x, y);
        return;
    }

    checkMoveTo(); // check if prev command was moveto

    // Get the current (x, y) coordinates of the path
    double x0 = cx;
    double y0 = cy;
    if (x0 == x && y0 == y) {
        // If the endpoints (x, y) and (x0, y0) are identical, then this
        // is equivalent to omitting the elliptical arc segment entirely.
        return;
    }

    Arc2D arc = computeArc(x0, y0, rx, ry, angle, largeArcFlag, sweepFlag, x, y);
    if (arc == null)
        return;

    AffineTransform t = AffineTransform.getRotateInstance(Math.toRadians(angle), arc.getCenterX(),
            arc.getCenterY());
    Shape s = t.createTransformedShape(arc);
    path.append(s, true);

    makeRoom(7);
    types[numSeg++] = ExtendedPathIterator.SEG_ARCTO;
    values[numVals++] = rx;
    values[numVals++] = ry;
    values[numVals++] = angle;
    values[numVals++] = largeArcFlag ? 1 : 0;
    values[numVals++] = sweepFlag ? 1 : 0;
    cx = values[numVals++] = x;
    cy = values[numVals++] = y;
}

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