getNearestPointInside static method
Get the point inside (inclusively) the given Quad that is nearest to the given Vector3.
Implementation
@visibleForTesting
static Vector3 getNearestPointInside(Vector3 point, Quad quad) {
// If the point is inside the axis aligned bounding box, then it's ok where
// it is.
if (pointIsInside(point, quad)) {
return point;
}
// Otherwise, return the nearest point on the quad.
final List<Vector3> closestPoints = <Vector3>[
InteractiveViewer.getNearestPointOnLine(point, quad.point0, quad.point1),
InteractiveViewer.getNearestPointOnLine(point, quad.point1, quad.point2),
InteractiveViewer.getNearestPointOnLine(point, quad.point2, quad.point3),
InteractiveViewer.getNearestPointOnLine(point, quad.point3, quad.point0),
];
double minDistance = double.infinity;
late Vector3 closestOverall;
for (final Vector3 closePoint in closestPoints) {
final double distance = math.sqrt(
math.pow(point.x - closePoint.x, 2) + math.pow(point.y - closePoint.y, 2),
);
if (distance < minDistance) {
minDistance = distance;
closestOverall = closePoint;
}
}
return closestOverall;
}