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    • 1. 发明专利
    • Sliced data structure for particle-based simulation and method for loading particle-based simulation using sliced data structure into gpu
    • 用于基于粒子的模拟的简化数据结构和使用SLICED数据结构加载到GPU中的基于粒子的模拟的方法
    • JP2009069930A
    • 2009-04-02
    • JP2007234989
    • 2007-09-11
    • Prometech Software Incプロメテック・ソフトウェア株式会社
    • HARADA TAKAHIRO
    • G06F19/00
    • G06F17/30592G06T15/005
    • PROBLEM TO BE SOLVED: To provide a sliced data structure for particle-based simulation based on a fluid calculation method using particles and a method for loading it into a GPU for making satisfactory the using efficiency of a memory for the way of use of calculation grids to be used for neigborhood searching.
      SOLUTION: The sliced data structure used for a particle-based simulation using a CPU or GPU 12 is a data structure for a calculation space 31. The space is a three-dimensional calculation space constructed from numerous voxels 32; and a plurality of slices 31a perpendicular to the Y axis is formed; numerous voxels are divided by a plurality of two-dimensional slices; and the respective starting coordinates of the maximum and minimum voxels are calculated for a range of voxels in which particles are present in each of a plurality of two-dimensional slices; and the voxel range is determined as a bounding box surrounded by a rectangular shape; and memory is provided for the voxels contained in the bounding boxes of each of the plurality of two-dimensional slices.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:基于使用粒子的流体计算方法提供用于基于粒子的模拟的切片数据结构,以及将其加载到GPU中以使令人满意的存储器的使用效率令人满意的方式 的计算网格用于邻域搜索。 解决方案:用于使用CPU或GPU 12的基于粒子的模拟的切片数据结构是用于计算空间31的数据结构。空间是由多个体素32构成的三维计算空间; 并且形成与Y轴垂直的多个切片31a; 许多体素被多个二维切片分割; 并且针对其中存在于多个二维切片中的每一个中的粒子的体素范围计算最大和最小体素的相应起始坐标; 并且体素范围被确定为由矩形形状包围的边界框; 并且为包含在多个二维切片中的每一个的边界框中的体素提供记忆。 版权所有(C)2009,JPO&INPIT
    • 2. 发明专利
    • Method for constructing surface of fluid simulation based on particle method, program and storage medium with its program stored
    • 基于粒子方法构建流体表面的方法,程序存储和程序存储介质的方法
    • JP2009069929A
    • 2009-04-02
    • JP2007234988
    • 2007-09-11
    • Prometech Software Incプロメテック・ソフトウェア株式会社
    • HARADA TAKAHIRO
    • G06F19/00
    • G06F17/5009G06F2217/16G06T13/20G06T2210/24G06T2210/56
    • PROBLEM TO BE SOLVED: To provide a surface construction method of fluid simulation based on a particle method expressing thin films or sharp edges in the fluid in the display of the fluid simulation of the particle method.
      SOLUTION: This surface construction method is a method applied to a method for rendering calculation results on the screen of a display device 15 using data that are obtained by calculation of a fluid simulation based on a particle method executed by a CPU or the like. The method has a first stage S100 of allocating a concentration sphere to a particle that is a calculation object and computing an implicit function curved surface, and computing a plurality of base vertices (V
      0 ) for creating a fluid surface by the implicit function curved surface; and a second stage S200 that is executed at least one time for adjusting a surface sharpness for each of the plurality of base vertices (V
      0 ) for creating the fluid surface that is computed in the first stage.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种基于在颗粒方法的流体模拟显示器中的液体中表现薄膜或尖锐边缘的粒子方法的流体模拟的表面施工方法。 解决方案:该表面施工方法是应用于使用通过基于由CPU执行的粒子方法计算流体模拟而获得的数据的显示装置15的屏幕上的计算结果的方法的方法, 喜欢。 该方法具有将浓度球分配给作为计算对象的粒子并计算隐式函数曲面的第一阶段S100,并且计算用于创建流体的多个基本顶点(V 0 ) 表面通过隐式函数曲面; 以及至少一次执行用于调整用于创建在第一阶段中计算的流体表面的多个基本顶点(V 0 )中的每一个的表面锐度的第二阶段S200。 版权所有(C)2009,JPO&INPIT
    • 3. 发明专利
    • Mesh generating system and mesh generating program
    • MESH生成系统和MESH生成程序
    • JP2005196273A
    • 2005-07-21
    • JP2003435443
    • 2003-12-26
    • Prometech Software IncTechno Star:Kkプロメテック・ソフトウェア株式会社株式会社テクノスター
    • INABA MASAKAZUFUJISAWA TOMOMITSUYAGAWA MOTOKI
    • G06F17/50
    • PROBLEM TO BE SOLVED: To efficiently retrieve nodal points when forming mesh, and also execute parallel processing by a plurality of processing elements.
      SOLUTION: The respective processing elements 12 have a CDT processing part 16 for forming the mesh such as the respective elements become restrictive Deloney (CDT) division on the basis of a surface patch for defining the nodal point arranged inside an object and a surface shape of the object, and a quasi-restrictive Deloney division (SCDT) processing part 18 for selecting a new nodal point where a figure made of a nodal point of an element and a new nodal point does not cross with any surface patch and does not cross any of pre-formed elements, that is, the new nodal point where any nodal point does not exist inside the figure made of the nodal point of the element and the new nodal point, for retrieving a satellite nodal point for forming a nodal point of a certain element and a new nodal point when the element does not satisfy the CDT.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:在形成网格时有效地检索节点,并且还通过多个处理元件执行并行处理。 解决方案:各个处理元件12具有用于形成网格的CDT处理部分16,其中各个元素基于用于定义布置在对象内的节点的表面贴片成为限制性的Deloney(CDT)划分,以及 物体的表面形状以及用于选择新的节点的准限制性Deloney分割(SCDT)处理部分18,其中由元件的节点和新节点形成的图形与任何表面贴片不相交,并且 没有交叉任何预先形成的元素,即新的节点,其中在由元素的节点和新节点形成的图形内部不存在任何节点,用于检索用于形成节点的卫星节点 当元素不满足CDT时,某个元素的点和新的节点。 版权所有(C)2005,JPO&NCIPI
    • 7. 发明专利
    • Fluid analyzing method with computer
    • 流体分析方法与计算机
    • JP2009129193A
    • 2009-06-11
    • JP2007303583
    • 2007-11-22
    • Prometech Software IncUniv Of Tokyoプロメテック・ソフトウェア株式会社国立大学法人 東京大学
    • KOSHIZUKA SEIICHIKONDO MASAHIROFUJISAWA TOMOMITSU
    • G06F19/00G06F17/50
    • PROBLEM TO BE SOLVED: To provide a fluid analyzing method with a computer for suppressing pressure vibration by an MPS method without changing the density of fluid in fluid analysis by the MPS method. SOLUTION: This fluid analyzing method with a computer for carrying out fluid analysis related with incompressible fluid by executing the calculation algorithm of an MPS method with the computer includes: a first stage S10 including a step S44 for calculating a viscous term or the like and steps S45 and S46 for calculating the temporary speeds and temporary positions of particles; and a second stage S20 including a pressure term calculation step for calculating a pressure term based on Poisson equation and a step for correcting the temporary speeds and temporary positions of the particles. In the pressure term calculation step, for example, the pressure term is calculated by using the Poisson equation using preliminarily prepared number of particle density n k (step S48), and an auxiliary pressure is calculated by a formula using particle number density n k and preliminarily prepared number of particle density n 0 , and added to the pressure term (step S49). COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了通过MPS方法提供一种用于通过MPS方法抑制压力振动的计算机的流体分析方法,而不通过MPS方法改变流体分析中的流体密度。 解决方案:通过用计算机执行MPS方法的计算算法,该计算机进行与不可压缩流体相关的流体分析的流体分析方法包括:第一阶段S10,包括用于计算粘性项或步骤S44的步骤S44 以及用于计算颗粒的临时速度和临时位置的步骤S45和S46; 以及包括压力项计算步骤的第二阶段S20,该压力项计算步骤用于计算基于泊松方程的压力项和用于校正颗粒的临时速度和临时位置的步骤。 在压力项计算步骤中,例如,使用预先准备好的粒子数密度n k 的泊松方程来计算压力项(步骤S48),辅助压力通过式 使用粒子数密度n k ,并预先准备数量的粒子密度n 0 ,并加到压力项(步骤S49)。 版权所有(C)2009,JPO&INPIT
    • 8. 发明专利
    • Method for constructing data structure used for proximate particle search, program for the same, and storage medium for storing program
    • 用于构建用于临时颗粒搜索的数据结构的方法,以及用于存储程序的存储介质的方法
    • JP2009043245A
    • 2009-02-26
    • JP2008184478
    • 2008-07-16
    • Prometech Software Incプロメテック・ソフトウェア株式会社
    • HARADA TAKAHIRO
    • G06T13/20G06T15/00
    • G06T13/20G06T2210/56
    • PROBLEM TO BE SOLVED: To provide a method for constructing a data structure used in a proximate particle search, whereby construction of the data structure used in the proximate particle search of a particle based-simulation can be concluded by a GPU or the like, the GPU or the like can be efficiently utilized, and also to provide a program for the same and storage medium storing the program. SOLUTION: The method for constructing the data structure of a proximate particle search is executed by a streaming processor such as the GPU 12, and computes a simulation of a physical object by converting three-dimensional digital image data to two-dimensional digital image data. When using the GPU, a bucket texture is used. The bucket texture is composed of buckets for dividing a memory space that is created in accordance with a space in which the physical object occurs. In the case of the GPU, a step is provided which reads a particle coordinate and the particle number of a particle stored in the bucket by using a vertex shader, and writes the particle coordinate and the particle number to a two-dimensional image space. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种用于构建在近似粒子搜索中使用的数据结构的方法,由此在基于粒子的仿真的近似粒子搜索中使用的数据结构的构造可以由GPU或 可以有效地利用GPU等,并且还提供用于存储程序的相同程序和存储介质。 解决方案:用于构建近似粒子搜索的数据结构的方法由诸如GPU 12的流处理器执行,并且通过将三维数字图像数据转换为二维数字图像来计算物理对象的模拟 图像数据。 使用GPU时,会使用一个桶纹理。 桶纹理由用于划分根据物理对象发生的空间而创建的存储器空间的桶组成。 在GPU的情况下,提供通过使用顶点着色器读取粒子坐标和存储在存储桶中的粒子的粒子数的步骤,并将粒子坐标和粒子数量写入二维图像空间。 版权所有(C)2009,JPO&INPIT