US 11,900,543 B2
Tessellation method using displacement factors
Peter Malcolm Lacey, Buckinghamshire (GB); and Simon Fenney, St. Albans (GB)
Assigned to Imagination Technologies Limited, Kings Langley (GB)
Filed by Imagination Technologies Limited, Kings Langley (GB)
Filed on Oct. 19, 2022, as Appl. No. 17/969,449.
Application 17/969,449 is a continuation of application No. 17/061,721, filed on Oct. 2, 2020, granted, now 11,501,494.
Application 17/061,721 is a continuation of application No. 16/255,627, filed on Jan. 23, 2019, granted, now 10,832,473, issued on Nov. 10, 2020.
Application 16/255,627 is a continuation of application No. 15/174,035, filed on Jun. 6, 2016, granted, now 10,229,536, issued on Mar. 12, 2019.
Claims priority of application No. 1509762 (GB), filed on Jun. 5, 2015.
Prior Publication US 2023/0066361 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 17/20 (2006.01); G06T 15/00 (2011.01); G06T 15/80 (2011.01)
CPC G06T 17/20 (2013.01) [G06T 15/005 (2013.01); G06T 15/80 (2013.01); G06T 17/205 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of performing tessellation in a computer graphics system, the method comprising:
performing tessellation on one or more input patches to generate a plurality of primitives defined by vertices, the tessellation comprising adding one or more new child vertices and calculating a displacement factor for each newly added child vertex; and
generating a world space parameter for each vertex by modifying a target world space parameter for a child vertex using the displacement factor for the child vertex and world space parameters for parent vertices of the child vertex;
wherein the world space parameter is used for rendering objects in a scene.