public static IEnumerable <Plane> VisibilityBoundaries(this IImageModel @this)
{
var vertices = @this.Domain.Vertices;
for (var i = 0; i < 4; i++)
{
var los1 = @this.LineOfSight(vertices[i]);
var los2 = @this.LineOfSight(vertices.ElementAtCyclic(i + 1));
yield return(Plane.Parametric(@this.OpticalCenter, los2, los1));
}
}
public static Ray3?Ray(this IImageModel @this, Vector2 imagePoint)
{
var los = @this.LineOfSight(imagePoint);
if (los == null)
{
return(null);
}
else
{
return(new Ray3(@this.OpticalCenter, los));
}
}