@Override
public final boolean hit(int x, int y, int hitThreshold) {
return (lineVisible && line.intersects(x - 3, y - 3, 6, 6))
|| (arrowheadVisible && gp.intersects(x - 3, y - 3, 6, 6));
}
@Override
public boolean intersectsRectangle(GRectangle rect) {
return (lineVisible && line.intersects(rect)) || (arrowheadVisible && gp.intersects(rect));
}
/** Sets the line and arrow of the vector. */
private void setArrow(float lineThickness) {
// screen coords of start and end point of vector
boolean onscreenA = view.toScreenCoords(coordsA);
boolean onscreenB = view.toScreenCoords(coordsB);
coordsV[0] = coordsB[0] - coordsA[0];
coordsV[1] = coordsB[1] - coordsA[1];
// calculate endpoint F at base of arrow
double factor = getFactor(lineThickness);
double length = MyMath.length(coordsV[0], coordsV[1]);
// decrease arrowhead size if it's longer than the vector
if (length < factor) {
factor = length;
}
if (length > 0.0) {
coordsV[0] = (coordsV[0] * factor) / length;
coordsV[1] = (coordsV[1] * factor) / length;
}
double[] coordsF = new double[2];
coordsF[0] = coordsB[0] - coordsV[0];
coordsF[1] = coordsB[1] - coordsV[1];
// set clipped line
if (line == null) line = AwtFactory.prototype.newLine2D();
lineVisible = true;
if (onscreenA && onscreenB) {
// A and B on screen
line.setLine(coordsA[0], coordsA[1], coordsF[0], coordsF[1]);
} else {
// A or B off screen
// clip at screen, that's important for huge coordinates
// check if any of vector is on-screen
org.geogebra.common.awt.GPoint2D[] clippedPoints =
ClipLine.getClipped(
coordsA[0],
coordsA[1],
coordsB[0],
coordsB[1],
-EuclidianStatic.CLIP_DISTANCE,
view.getWidth() + EuclidianStatic.CLIP_DISTANCE,
-EuclidianStatic.CLIP_DISTANCE,
view.getHeight() + EuclidianStatic.CLIP_DISTANCE);
if (clippedPoints == null) {
isVisible = false;
lineVisible = false;
arrowheadVisible = false;
} else {
// now re-clip at A and F
clippedPoints =
ClipLine.getClipped(
coordsA[0],
coordsA[1],
coordsF[0],
coordsF[1],
-EuclidianStatic.CLIP_DISTANCE,
view.getWidth() + EuclidianStatic.CLIP_DISTANCE,
-EuclidianStatic.CLIP_DISTANCE,
view.getHeight() + EuclidianStatic.CLIP_DISTANCE);
if (clippedPoints != null)
line.setLine(
clippedPoints[0].getX(),
clippedPoints[0].getY(),
clippedPoints[1].getX(),
clippedPoints[1].getY());
else lineVisible = false;
}
}
// add triangle if visible
if (gp == null) gp = AwtFactory.prototype.newGeneralPath();
else gp.reset();
if (isVisible) {
if (length > 0) {
coordsV[0] /= 4.0;
coordsV[1] /= 4.0;
gp.moveTo((float) coordsB[0], (float) coordsB[1]); // end point
gp.lineTo((float) (coordsF[0] - coordsV[1]), (float) (coordsF[1] + coordsV[0]));
gp.lineTo((float) (coordsF[0] + coordsV[1]), (float) (coordsF[1] - coordsV[0]));
gp.closePath();
}
arrowheadVisible = onscreenB || gp.intersects(0, 0, view.getWidth(), view.getHeight());
}
}