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公开(公告)号：US5821942A
公开(公告)日：1998-10-13
申请号：US622639
申请日：1996-03-27
摘要： A system for displaying sets of surface cubes with gradient vertex vectors first employs a pointer table constructed to order the surface cubes so as to generally cause a row by row and layer by layer ordering during model creation. During display, a viewpoint is selected and a scan controller causes cubes to be displayed according to this order of the pointer table. A test backprojection of cubes to image plane is performed to determine which pixels will be impinged by the cubes. For pixels which have not been updated, or pixels which have been updated by a less superficial cube than the current cube, projection rays are created through the center of impinged pixels in a direction opposite that of the backprojection. An intersection point of the ray with a surface within a current cube is determined. The data value and gradient vectors for the current cube are interpolated at this intersection point. These interpolated vector and value are then rendered to produce and image with less distortion and with less processing complexity.
摘要翻译： 用于显示具有渐变顶点向量的表面立方体的集合的系统首先采用构造成对表面立方体进行排序的指针表，以便在模型创建期间通常逐行并逐层排序。 在显示期间，选择视点，并且扫描控制器根据指针表的顺序使多维数据集显示。 执行立方体到图像平面的测试反投影以确定哪些像素将被立方体撞击。 对于尚未更新的像素，或者由比当前立方体更少的表面立方体更新的像素，通过与背投影相反的方向通过撞击像素的中心创建投影光线。 确定射线与当前立方体内的表面的交点。 在该交点处插入当前立方体的数据值和梯度向量。 然后渲染这些内插向量和值以产生和图像，具有较少的失真和较少的处理复杂度。
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公开(公告)号：US5802353A
公开(公告)日：1998-09-01
申请号：US662544
申请日：1996-06-12
CPC分类号： G06F3/016 , G06T19/20 , G06T2210/28 , G06T2219/2021
摘要： A computer modeling and visualization system employs both 3D visual modeling and force feedback through a haptic device consistent with the visual display of the computer model. Force, or haptic, interaction is employed for exploring computer models. Point contact force equations were created for quickly computing forces directly from a model data which are provided to the haptic device, causing it to apply that force to an operator. The force equations employed are consistent with isosurface and volume rendering, providing a strong correspondence between visual and haptic rendering. The method not only offers the ability to see and feel the volumetric model but allows interactive modification and display of the model.
摘要翻译： 计算机建模和可视化系统通过与计算机模型的视觉显示一致的触觉设备采用3D视觉建模和力反馈。 力或触觉相互作用被用于探索计算机模型。 创建点接触力方程，用于直接从提供给触觉装置的模型数据快速计算力，使其能够将该力施加到操作者。 所使用的力方程与等值面和体积渲染一致，提供视觉和触觉渲染之间的强烈对应关系。 该方法不仅提供了查看和感受体积模型的能力，而且允许交互式修改和显示模型。
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