针对图形处理芯片(GPU)中的曲面细分单元生成顶点数量过多的问题,提出一种基于三角形邻接关系的几何细分策略,称为TSTESS(Triangle Strip on Tessellation),其主要流程为,把细分块按照从外向内顺序拆分为多个环,对每个环生成多个梯形结...针对图形处理芯片(GPU)中的曲面细分单元生成顶点数量过多的问题,提出一种基于三角形邻接关系的几何细分策略,称为TSTESS(Triangle Strip on Tessellation),其主要流程为,把细分块按照从外向内顺序拆分为多个环,对每个环生成多个梯形结构,每个梯形生成大量连续的三角形,通过有限自动机根据三角形的绕向和相邻信息,提取出它们的共有顶点,构成连续的三角形条带并输出.TSTESS方法减少了顶点的生成数量,有利于后期的计算和存储.通过实验测试在各种细分参数的情况下,该方法生成的顶点数量只相当于传统的三角形列表方法的50%~65%左右,可提高细分单元的执行效率,并且易于使用硬件描述代码融入到已有的GPU设计中,便于曲面细分单元输出的三角形条带获得硬件加速.展开更多
Yanshanian igneous rocks in the East China, on an orogenic belt scale, are characterized by the continental marginal arc in petrology and geochemistry as Andes and West USA, except for the Hercyn type biotite two mi...Yanshanian igneous rocks in the East China, on an orogenic belt scale, are characterized by the continental marginal arc in petrology and geochemistry as Andes and West USA, except for the Hercyn type biotite two mica muscovite granite belt in the Nanling region. Three segments of the Yanshanian igneous rocks along the belt are recognized. In terms of magma tectonic event sequence, the north, middle and south segments have counter clockwise (ccw), clockwise (cw) and ccw+cw pTt paths of the orogenic process, respectively. A genetic model of the lithospheric delamination (loss of the lithospheric root in about 120 km) in combination with the oceanic subduction for the Yanshanian Andes like orogenic belt and both the crust and lithosphere thickening for the Yanshanian Hercyn type Nanling orogenic belt in the East China is suggested.展开更多
文摘针对图形处理芯片(GPU)中的曲面细分单元生成顶点数量过多的问题,提出一种基于三角形邻接关系的几何细分策略,称为TSTESS(Triangle Strip on Tessellation),其主要流程为,把细分块按照从外向内顺序拆分为多个环,对每个环生成多个梯形结构,每个梯形生成大量连续的三角形,通过有限自动机根据三角形的绕向和相邻信息,提取出它们的共有顶点,构成连续的三角形条带并输出.TSTESS方法减少了顶点的生成数量,有利于后期的计算和存储.通过实验测试在各种细分参数的情况下,该方法生成的顶点数量只相当于传统的三角形列表方法的50%~65%左右,可提高细分单元的执行效率,并且易于使用硬件描述代码融入到已有的GPU设计中,便于曲面细分单元输出的三角形条带获得硬件加速.
文摘Yanshanian igneous rocks in the East China, on an orogenic belt scale, are characterized by the continental marginal arc in petrology and geochemistry as Andes and West USA, except for the Hercyn type biotite two mica muscovite granite belt in the Nanling region. Three segments of the Yanshanian igneous rocks along the belt are recognized. In terms of magma tectonic event sequence, the north, middle and south segments have counter clockwise (ccw), clockwise (cw) and ccw+cw pTt paths of the orogenic process, respectively. A genetic model of the lithospheric delamination (loss of the lithospheric root in about 120 km) in combination with the oceanic subduction for the Yanshanian Andes like orogenic belt and both the crust and lithosphere thickening for the Yanshanian Hercyn type Nanling orogenic belt in the East China is suggested.
