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    • 4. 发明申请
    • RAY TRACING USING RAY-SPECIFIC CLIPPING
    • 使用RAY-SPECIFIC CLIPPING进行RAY跟踪
    • WO2010030674A1
    • 2010-03-18
    • PCT/US2009/056369
    • 2009-09-09
    • CAUSTIC GRAPHICS, INC.SALSBURY, Ryan, R.MCCOMBE, James, AlexanderPURCELL, StephenPETERSON, Luke, Tilman
    • SALSBURY, Ryan, R.MCCOMBE, James, AlexanderPURCELL, StephenPETERSON, Luke, Tilman
    • G06T15/00
    • G06T15/06
    • Systems, methods, and computer readable media embodying such methods provide for allowing specification of per-ray clipping information that defines a sub-portion of a 3-D scene in which the ray should be traced. The clipping information can be specified as a clip distance from a ray origin, as an end value of a parametric ray definition, or alternatively the clipping information can be built into a definition of the ray to be traced. The clipping information can be used to check whether portions of an acceleration structure need to be traversed, as well as whether primitives should be tested for intersection. Other aspects include specifying a default object that can be returned as intersected when no primitive was intersected within the sub-portion defined for testing. Further aspects include allowing provision of flags interpretable by an intersection testing resource that control what the intersection testing resource does, and/or what information it reports after conclusion of testing of a ray.
    • 体现这种方法的系统,方法和计算机可读介质提供允许规定限定其中应该追踪射线的3-D场景的子部分的每个射线限幅信息。 剪辑信息可以被指定为与光线原点的剪辑距离,作为参数光线定义的结束值,或者可以将剪辑信息内置到要跟踪的光线的定义中。 剪切信息可以用于检查是否需要遍历加速结构的部分,以及是否要对原语进行交叉测试。 其他方面包括指定一个默认对象,该对象可以在为测试定义的子部分内没有原语相交时返回。 其他方面包括允许提供可由交叉点测试资源解释的标志,该交叉点测试资源可以控制交叉点测试资源的作用,和/或在射线测试结束之后报告哪些信息。
    • 5. 发明申请
    • ARCHITECTURES FOR PARALLELIZED INTERSECTION TESTING AND SHADING FOR RAY-TRACING RENDERING
    • 用于光线追踪渲染的平行交叉测试和阴影构造
    • WO2009117691A2
    • 2009-09-24
    • PCT/US2009/037860
    • 2009-03-20
    • CAUSTIC GRAPHICS, INCPETERSON, Luke, TilmanMCCOMBE, James, AlexanderSALSBURY, Ryan, R.PURCELL, Stephen
    • PETERSON, Luke, TilmanMCCOMBE, James, AlexanderSALSBURY, Ryan, R.PURCELL, Stephen
    • G06T15/00
    • G06T15/06
    • In an example, ray tracing scenes includes using a plurality of intersection testing resources coupled with a plurality of shading resources, communicative in the aggregate through links/queues. A queue from testing to shading comprises respective ray/primitive intersection indications, comprising ray identifiers. A shading to testing queue comprises identifiers of new rays for test, wherein data defining the rays is separately stored in memories distributed among the intersection testing resources. Ray definition data can be retained in distributed memories until rays complete intersection testing, being selectable for testing multiple times based on ray identifier. A structure of acceleration shapes can be used. Packets of ray identifiers and shape data can circulate among intersection testing resources, each resource can test rays identified in the packet, and for which definition data is present in its memory. Acceleration shape test results allow collection of rays based on intersected shape, and closest detection ray/primitive intersections are indicated by queuing ray identifiers for shading.
    • 在一个示例中,光线追踪场景包括使用与多个阴影资源耦合的多个交叉点测试资源,其通过链路/队列在聚合中进行通信。 从测试到阴影的队列包括相应的光线/图元交叉点指示,包括光线标识符。 对测试队列的阴影包括用于测试的新射线的标识符,其中定义射线的数据被分开地存储在分布在相交测试资源之间的存储器中。 光线定义数据可以保留在分布式存储器中,直到光线完成相交测试,可选择基于光线标识符进行多次测试。 可以使用加速度形状的结构。 光线标识符和形状数据包可以在相交测试资源之间流通,每个资源可以测试包中标识的光线,以及其存储器中存在哪些定义数据。 加速度形状测试结果允许根据相交形状收集光线,最近的检测光线/图元交叉点通过用于着色的排队光线标识符指示。