Changes

The origin locator (shadow_x_ori, shd_x_ori1, shd_x_ori2, etc) defines the upper boundary, center, direction, and direction orientation of the shadow volume. This locator should generally always be oriented so that it points down (i.e. rotated so that the locator '''+y''' points in global '''-Z''')and rotated so that its '''+z''' points in global '''-Y'''. The corner locator (shadow_x_crn, shd_x_crn1, shd_x_crn2, etc) defines the width, length, and lower boundary of the shadow volume.