Abstract: A method for producing an aqueous adhesive dispersion, wherein a dispersion is produced from a sheet silicate having an SiO2 fraction and a hydrophobic ethylene/polyvinyl alcohol copolymer as protective colloid, and, in the presence of this dispersion, vinyl esters and optionally comonomers are polymerized.

Abstract: A filled gum adhesive useful for producing remoistenable layers contains fillers, protective colloids, and a (co)polymer, wherein the (co)polymer is prepared by polymerizing one or more ethylenically unsaturated monomers in the presence of a dispersion of protective colloid and filler particles.

Abstract: A filled gum adhesive useful for producing remoistenable layers contains fillers, protective colloids, and a (co)polymer, wherein the (co)polymer is prepared by polymerizing one or more ethylenically unsaturated monomers in the presence of a dispersion of protective colloid and filler particles.

Abstract: A graphics system that enhances shape perception. The presently preferred embodiment of the system utilizes the mathematical machinery of parametric texture maps. In general, parametric texture maps allow the graphics system to render surface features of a 3D object in a manner that is direction dependent but without the time consuming and expensive calculations involved in the evaluation of lighting equations on a per pixel basis. A parametric texture map holds a set of parameters that define a surface structure in a manner in which the appearance of the surface structure varies in response to a direction vector. The direction vector may be any user-defined vector including a light source vector or a half-angle vector. The parameters are those of a predetermined equation, the evaluation of which does not involve vector calculations. The equation may take any form including a polynomial equation or a non-polynomial equation. The graphic system renders a polygon with the surface structure using the equation.

Abstract: A graphics system that employs parametric texture maps that are converted from height fields. The system samples a hemisphere equidistantly to produce an array of normals, approximates a dot product of each sampled normal with an arbitrary unit vector, transforms the polynomials back to canonical basis, converts a height field to normals, and for each normal in the height field determines coefficients for a parametric texture map. The system then evaluates a diffuse contribution using the parametric texture map coefficients. The system may also then evaluate a specular contribution using the parametric texture map coefficients. The graphics system renders surface features of a 3D object in a manner that is direction dependent but without the time consuming and expensive calculations involved in the evaluation of lighting equations on a per pixel basis.

Abstract: A graphics system that employs parametric texture maps. The graphics system renders surface features of a 3D object in a manner that is direction dependent but without the time consuming and expensive calculations involved in the evaluation of lighting equations on a per pixel basis. A parametric texture map holds a set of parameters that define a surface structure in a manner in which the appearance of the surface structure varies in response to a direction vector. The direction vector may be any user-defined vector including a light source vector or a half-angle vector. The parameters are those of a predetermined equation, the evaluation of which does not involve vector calculations. The equation may take any form including a polynomial equation or a non-polynomial equation. The graphic system renders a polygon with the surface structure using the equation.