Abstract:
We present a new culling test for rasterization of simultaneous depth of field and motion blur, which efficiently reduces the set of (x, y, u, v, t) samples that need to be coverage tested within a screen space tile. The test finds linear bounds in u, t space and v, t space respectively, using a separating line algorithm. This test is part of the foundation for an efficient 5D rasterizer that extracts coherence in both defocus and motion blur to minimize the number of visibility tests.
Abstract:
Multi-view rasterization may be performed by calculating visibility over a camera line. Edge equations may be evaluated iteratively along a scanline. The edge equations may be evaluated using single instruction multiple data instruction sets.
Abstract:
In accordance with some embodiments, depth values may be split into more and less significant bits. By so doing, some processing can be done based only on the more significant bits. Where the number of more significant bits is significantly less than the total number of bits, some memory bandwidth can be preserved. In other words, by only using the more significant bits for some of the depth buffering operations, memory bandwidth usage can be reduced, improving efficiency.
Abstract:
A depth buffer compression scheme uses bilinear patches as a predictor for depth. The scheme targets compression of scenes rendered with stochastic blur rasterization. A tile of fragments may be split into two or more regions and a higher-degree function may be fit to each region. The residuals are then stored as delta corrections.
Abstract:
Unlike a static primitive, where the depth function is planar, the depth function for a moving and defocused triangle is a rational function in time and the lens parameters. Compact depth functions can be used to design an efficient depth buffer compressor/decompressor, which significantly lowers total depth buffer bandwidth usage. In addition, this compressor/decompressor is substantially simpler in the number of operations needed to execute, which makes it more amenable for hardware implementation than previous methods.
Abstract:
Depth of field may be rasterized by culling half-space regions on a lens from which a triangle to be rendered is not visible. Then, inside tests are only performed on the remaining unculled half-space regions. Separating planes between the triangle to be rendered and the tile being processed can be used to define the half-space regions.
Abstract:
We present a technique that utilizes a motion blur (three dimensional) rasterizer to augment the PCS culling technique so that it can be used for continuous collision detection, which to the best of our knowledge has not been done before for motion blur using a graphics processor.
Abstract:
Depth of field may be rasterized by culling half-space regions on a lens from which a triangle to be rendered is not visible. Then, inside tests are only performed on the remaining unculled half-space regions. Separating planes between the triangle to be rendered and the tile being processed can be used to define the half-space regions.