Patent ID: 9508316
Filing Date: 2016-11-29
CPC Classification: G06T,G09G

Claim Text:
1. A method of rendering a parametric patch by a rendering device, said method comprising: receiving the parametric patch tessellated into a plurality of cells, the parametric patch being associated with a surface mapping points of the patch to intermediate values, wherein each of the intermediate values is mapped to a color value according to a shading color function; determining a set of intermediate values representing an approximation of the shading color function, the set comprising a first intermediate value stored in a memory of the rendering device; identifying an isoline, within the patch, connecting points having the first intermediate value, the isoline being associated with a plurality of approximation points to approximate the isoline; forming further cells by joining at least one approximation point of the isoline and at least two tessellation points within the patch; and rendering the patch by the rendering device using the intermediate values corresponding to vertices of the further cells.