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    Method and apparatus for determining item orientation
    33.
    发明授权
    Method and apparatus for determining item orientation 有权
    用于确定项目取向的方法和装置

    公开(公告)号：US08217938B2

    公开(公告)日：2012-07-10

    申请号：US11756126

    申请日：2007-05-31

    Applicant: Yifan Chen ,  Basavaraj Tonshal ,  Pietro Buttolo

    Inventor： Yifan Chen ,  Basavaraj Tonshal ,  Pietro Buttolo

    IPC: G06T17/00 ,  G06T15/00

    CPC classification number: G06T17/20 ,  G06T7/73 ,  G06T7/77

    Abstract: A computer-implemented method and computer software for calculating an orientation for an item. A bounding cube is constructed which encompasses a mesh representation of the item. The bounding cube is divided into a plurality of voxel elements. A data structure may be used to subdivide the bounding cube. Calculations are performed to determine which of the plurality of voxel elements intersect with the mesh, defining a voxel representation of the item. A statistical analysis is performed on the voxel representation to determine an orientation for the item.

    Abstract translation: 一种计算机实现的方法和计算机软件，用于计算项目的方向。 构造包含项目的网格表示的边界立方体。 边界立方体被分成多个体素元素。 可以使用数据结构来细分边界立方体。 执行计算以确定多个体素元素中的哪一个与网格相交，定义项目的体素表示。 对体素表示进行统计分析，以确定项目的方向。

    System and method of applying geometric surface features to volumetric CAE mesh models
    35.
    发明申请
    System and method of applying geometric surface features to volumetric CAE mesh models 审中-公开
    几何表面特征应用于体积CAE网格模型的系统和方法

    公开(公告)号：US20070273688A1

    公开(公告)日：2007-11-29

    申请号：US11440387

    申请日：2006-05-24

    Applicant: Yifan Chen ,  Basavaraj Tonshal

    Inventor： Yifan Chen ,  Basavaraj Tonshal

    IPC: G06T17/00

    CPC classification number: G06T17/20

    Abstract: A CAE mesh modeling system and method for use with a CAE mesh morphing software system to interactively determine a deformation of design mesh models selected from solid meshes, multiple layers of surface meshes, or a combination of each using a base model and defined deformation features. The methodology advantageously defines a volumetric region of the model for modification, maintains a smooth transition between the volumetric region and the rest of the model, and simultaneously modifies all nodes and associated projected nodes within the affected volumetric region in a controlled manner. A new deformation volumetric model feature is created which includes the deformed base model. The methodology takes advantage of similarities between models by treating a set of mathematical operations associated with each mesh deformation as an independent entity that can be stored separately and reapplied to deform another model at another time.

    Abstract translation: 一种用于CAE网格变形软件系统的CAE网格建模系统和方法，用于交互地确定从实体网格，多层表面网格中选择的设计网格模型的变形，或者使用基本模型和定义的变形特征的每一种的组合。 该方法有利地定义用于修改的模型的体积区域，维持体积区域和模型的其余部分之间的平滑过渡，并且以受控的方式同时修改受影响体积区域内的所有节点和相关联的投影节点。 创建了一个新的变形体积模型特征，其中包括变形的基本模型。 该方法通过处理与每个网格变形相关联的一组数学运算作为独立实体，可以单独存储并重新应用以在另一时间使另一模型变形来利用模型之间的相似性。

    System and method of interactively generating a family of mesh models
    36.
    发明授权
    System and method of interactively generating a family of mesh models 有权
    交互式生成一系列网格模型的系统和方法

    公开(公告)号：US07275023B2

    公开(公告)日：2007-09-25

    申请号：US10353357

    申请日：2003-01-29

    Applicant: Yifan Chen ,  Paul J. Stewart ,  Pietro Buttolo ,  Anne Marsan

    Inventor： Yifan Chen ,  Paul J. Stewart ,  Pietro Buttolo ,  Anne Marsan

    IPC: G06F17/10

    CPC classification number: G06F17/5095 ,  G06F17/5018 ,  G06T17/20

    Abstract: A system and method for interactively generating a family of mesh models is provided for use in engineering analysis. The system includes a user computer system having a memory, a processor, a user input device and a display device. The system also includes a remotely located computer system having a processor, a memory, and a data storage means and in communication with the user computer system. The system further includes a computer-generated geometric mesh base model stored in the data storage means, a computer-generated mesh feature stored in the data storage means, and a new mesh model including the base mesh model with a mesh feature that is stored in the data storage means. The method includes the steps of selecting a base model from a model library maintained in the data storage means. The method also includes the steps of creating a mesh feature that is defined by a modifiable set of parameters and saving the mesh feature in a mesh feature library maintained in the data storage means. The method further includes the steps of establishing a feature matrix by the user containing instructions for selectively applying the mesh feature to the base mesh model and using the feature matrix to selectively apply the mesh feature to the base model to generate a new mesh model that is available for further analysis.

    Abstract translation: 提供用于交互式生成网格模型系列的系统和方法用于工程分析。 该系统包括具有存储器，处理器，用户输入设备和显示设备的用户计算机系统。 该系统还包括具有处理器，存储器和数据存储装置并与用户计算机系统通信的远程定位的计算机系统。 该系统还包括存储在数据存储装置中的计算机生成的几何网格基本模型，存储在数据存储装置中的计算机生成的网格特征，以及新的网格模型，其包括具有网格特征的基本网格模型， 数据存储装置。 该方法包括从维护在数据存储装置中的模型库中选择基本模型的步骤。 该方法还包括以下步骤：创建由可修改参数集定义的网格特征，并将网格特征保存在数据存储装置中维护的网格特征库中。 该方法还包括以下步骤：由用户建立包含用于选择性地将网格特征应用于基本网格模型的指令的特征矩阵，并且使用特征矩阵来选择性地将网格特征应用于基本模型以生成新的网格模型， 可供进一步分析。

    Method and system for manipulating a three-dimensional object utilizing a force feedback interface
    37.
    发明授权
    Method and system for manipulating a three-dimensional object utilizing a force feedback interface 失效
    利用力反馈界面来操纵三维物体的方法和系统

    公开(公告)号：US5973678A

    公开(公告)日：1999-10-26

    申请号：US921132

    申请日：1997-08-29

    Applicant: Paul Joseph Stewart ,  Yifan Chen ,  Pietro Buttolo

    Inventor： Paul Joseph Stewart ,  Yifan Chen ,  Pietro Buttolo

    IPC: G06F3/00 ,  G06F3/01 ,  G09G5/00

    CPC classification number: G06F3/016 ,  G06F3/011 ,  G05B2219/34141 ,  G05B2219/40619

    Abstract: A method and system for manipulating a three-dimensional object in a computer-aided design (CAD) environment utilizes a force feedback interface. A gravitational sphere is defined around each of the plurality of input parameters of a mathematical model defining a shape, location and orientation of the object. A force is applied to the force feedback interface based on the gravitational spheres and the position of the force feedback interface. An input signal is received from the force feedback interface based on the applied force indicating selection of one of the plurality of input parameters. The selected input parameter can then be edited according to an edit signal generated by the user via the force feedback interface. In addition, the edit signal can be limited according to predetermined constraints via the force feedback interface.

    Abstract translation: 用于在计算机辅助设计（CAD）环境中操纵三维物体的方法和系统利用力反馈界面。 围绕限定对象的形状，位置和取向的数学模型的多个输入参数中的每一个定义重力球。 基于重力球和力反馈界面的位置将力施加到力反馈界面。 基于所述施加的力，从所述力反馈接口接收输入信号，所述力指示所述多个输入参数之一的选择。 然后可以根据用户通过力反馈界面产生的编辑信号来编辑所选择的输入参数。 此外，可以经由力反馈界面根据预定的约束来限制编辑信号。

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