Question

WebGL, in favor of performance, using the pipeline model to process the vertices. One drawback of this approach is it cannot consider global lighting effects. Discuss the impact of this decision on the generated graphics.

write approximately 100 words please or more

Answer 1

The GPU does two seperate things. It computes the geometry of the scene relative to the camera (Vertex Processing), and it “paints” the pixels of that geometry.The geometry calculations, are the “Vertex Processing”, and is done with Vertex Shaders. And the painting of the pixels, or “Pixel Processing”, is done with pixel shaders.so the main aim of vertex processing is Process and transform individual vertices & normals.

following are the impacts on the generated graphics

• In the pipeline approach, the most global effects used in graphics like shadow ,reflection, blending cannot be handled in a correct manner
• the latency of the system must be balanced against increased throughput in calculating the performance of a pipeline