/**
* Calculates the length of a ray until it intersects with a shape.<br/>
* As this class uses the set maximum ray range to speed up this ray casting,<br/>
* this function may return {@code double.PositiveInfinity} for a ray that intersects with an obstacle that is further away than the rayRange from the given starting point.
* @param ray the ray to be used for ray casting.
* @return the length of the ray.
*/
public double rayCast(Ray2D ray)
{
double result = double.PositiveInfinity;
Rect2D rayBounding = new Rect2D(ray.getStart().getX() - rayRange, ray.getStart().getY() - rayRange, ray.getStart().getX() + rayRange, ray.getStart().getY() + rayRange);
for (int i = 0; i < shapes.Size(); ++i)
{
Rect2D bounding = boundaries.Get(i);
if (rayBounding.isInsideBorder(bounding.getLowerLeft()) ||
rayBounding.isInsideBorder(bounding.getUpperLeft()) ||
rayBounding.isInsideBorder(bounding.getLowerRight()) ||
rayBounding.isInsideBorder(bounding.getUpperRight()))
{
double tmp = shapes.Get(i).rayCast(ray);
result = tmp < result ? tmp : result;
}
}
return(result);
}
