1. A method for determining projector angles to points on a surface to provide three-dimensional position information on said points, comprising the steps of: irradiating selectively a surface with irradiating volumes having varying intensities defining a first pattern; irradiating said surface with irradiating volumes having varying intensities defining at least a second pattern; a point to be located on the surface being irradiated by said first and at least said second patterns; recording images of said patterns; and scanning said images to find the intensities of said point in the at least two patterns, said point having a possible location where the recorded images have equal values as well as at locations between points where the recorded images have equal values, whereby three-dimensional measurements of points are obtained for an entire region between points of equal values of intensity as well as at points of equal values of intensity; the determination of projector angle to said point on the surface being dependent on a predetermined algebraic function of the intensities of said point in said at least two patterns, said intensities having calibrated singlevalued algebraic functions.