公开(公告)号：US20120249742A1

公开(公告)日：2012-10-04

申请号：US13436571

申请日：2012-03-30

申请人： Oliver Abert

发明人： Oliver Abert

IPC分类号： H04N13/02

CPC分类号： G06T17/005 ,  G06T11/203 ,  G06T15/06 ,  G06T17/20 ,  G06T17/30

摘要： The invention relates to visualizing freeform surfaces, like NURBS surfaces, from three-dimensional construction data via Virtual beams from a virtual camera are sent out of a virtual image plane in a scene having at least one object and at least one freeform surface. Lighting values are calculated for each point where a beam intersects the freeform surface. The lighting values are then attributed to the pixels associated with the different points of intersection. The freeform surface is defined by two parameters (u, v), and related equations define all points of the surface of the freeform surface The subdivision of the freeform surface for determining the intersections with the beams based on the two parameters (u, v) is regular, so that the surface fragments form meshes of a two-dimensional grid of the freeform surface in the parameter space.

摘要翻译： 本发明涉及通过来自虚拟相机的虚拟光束从三维构造数据可视化诸如NURBS表面的自由曲面，在具有至少一个对象和至少一个自由曲面的场景中从虚拟图像平面发出。 针对光束与自由曲面相交的每个点计算照明值。 然后将照明值归因于与不同交点相关联的像素。 自由形状表面由两个参数（u，v）定义，相关方程式定义自由曲面表面的所有点。根据两个参数（u，v）确定与梁的交点的自由曲面的细分， 是规则的，使得表面碎片形成参数空间中自由曲面的二维网格的网格。

公开(公告)号：US09811944B2

公开(公告)日：2017-11-07

申请号：US13436571

申请日：2012-03-30

申请人： Oliver Abert

发明人： Oliver Abert

IPC分类号： G06T17/00 ,  G06T11/20 ,  G06T15/06 ,  G06T17/30 ,  G06T17/20

CPC分类号： G06T17/005 ,  G06T11/203 ,  G06T15/06 ,  G06T17/20 ,  G06T17/30

摘要： The invention relates to visualizing freeform surfaces, like NURBS surfaces, from three-dimensional construction data via Virtual beams from a virtual camera are sent out of a virtual image plane in a scene having at least one object and at least one freeform surface. Lighting values are calculated for each point where a beam intersects the freeform surface. The lighting values are then attributed to the pixels associated with the different points of intersection. The freeform surface is defined by two parameters (u, v), and related equations define all points of the surface of the freeform surface The subdivision of the freeform surface for determining the intersections with the beams based on the two parameters (u, v) is regular, so that the surface fragments form meshes of a two-dimensional grid of the freeform surface in the parameter space.