[en] EXPLORING APPLICATIONS THAT USE VERTEX GENERATION ONGPU
GUSTAVO BASTOS NUNES · 2011
[pt] Um dos maiores gargalos do pipeline grafico hoje e a largura de banda disponivel entre a GPU e CPU. Para minimizar esse gargalo funcionalidades programaveis foram inseridas nas placas de video. Com o Geometry Shader e possivel criar vertices em GPU, porem, este estagio da pipeline apresenta performance baixa. Com o lancamento das novas APIs graficas (DirectX11 e OpenGL4) em 2009, foi adicionado o Tessellator, que permite a criacao de vertices em massa na GPU. Esta dissertacao estuda este novo estagio da pipeline, bem como apresenta algoritmos classicos (PN-Triangles e Phong Tessellation) que originalmente foram feitos para CPU e propoe novos algoritmos (Renderizacao de Tubos e Terrenos em GPU) para tirar proveito deste novo paradigma.%%%%[en] One of the main bottlenecks in the graphics pipeline nowadays is the memory bandwidth available between the CPU and the GPU. To avoid this bottleneck, programmable features were inserted into the video cards. With the Geometry Shader launch it is possible to create vertices in the GPU, however, this pipeline stage has a low performance. With the new graphic APIs (DirectX11 and OpenGL4) a Tessellator stage that allows massive vertex generation inside the GPU was created. This dissertation studies this new pipeline stage, as well as presents classic algorithms (PN-Triangles and Phong Tessellation) that were originally designed for CPU and proposes new algorithms (Tubes and Terrain rendering in the GPU) that takes advantage of this new paradigm.