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The Architecture of A Flexible Supercomputer Integrating A Realtime Visualization Mechanism with 3-Dimensional Memories

集成实时可视化机制和 3 维存储器的灵活超级计算机的体系结构

基本信息

批准号：
06402059
负责人：
TOMITA Shinji
金额：
$ 18.94万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

We produced a prototype of ReVolver/C40, a parallel computer for volume rendering, following the research result of '94.The caharacteristic functions of ReVolver/C40 are realtime processing, perspective drawing, rendering of translucnet objects, and volume ray-tracing.ReVolver/C40 is consisted of macro-pipeline of 3-stages, ray-casting, pixel-calculation, and shading. Each stage render at high-speed by parallel processing of fine-grained pipeline processing depending on its form of processing. The performance is bounded by the pixel calculation stage. It is especially significant whether all the voxels crossed by a ray can be read or not. So, ReVolver/C40 adopts the triple volume memory, and the scheme to sample voxels in the direction of the main axis of a ray. This enables parallel volume access to any ray of arbitrary direction.From the design data at the point of PCB design, the rendering speed is 2.5 frames per second, in the case that the pixel calculation stage is consisted of 128 DSPs (TMS320C40,50MHz) . ReVolver/C40 can speeds up in proportion to a number of DSPs because of its scalable configuration.On the other hand, triple memory, the heart of ReVolver/C40, hold the problem about its big size. So, we also designed a single memory configuration which also enables parallel voxel access on a ray. It is achieved by limtting the angle of the viewing field to 54ﾟ.It is available because the result of scientific calculation or medical vision do not need a wide viewing field.

我们在94年研究成果的基础上，研制了一台用于体绘制的并行计算机ReVolver/C40。ReVolver/C40的特点是具有实时处理、透视图绘制、三维物体绘制和体光线跟踪等功能。每个阶段根据其处理形式，通过细粒度流水线处理的并行处理来高速渲染。性能受像素计算阶段的限制。一条射线所穿过的所有体素是否都能被读取，这一点尤为重要。因此，ReVolver/C40采用了三倍体存储器，并在射线主轴方向上采样体素的方案。从PCB设计时的设计数据来看，在像素计算级由128片DSP（TMS 320 C40，50 MHz）组成的情况下，绘制速度为2.5帧/秒。ReVolver/C40具有可扩展的结构，可以与多个DSP成比例地提高速度，但作为其核心的三重存储器存在体积大的问题。因此，我们还设计了一个单一的内存配置，也使并行体素访问的射线。它是通过将视场角限制在54 °来实现的，这是因为科学计算或医学视觉的结果不需要宽视场。