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发表于 2016-9-25 15:52 · 上海
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本帖最后由 sonys 于 2016-9-27 13:21 编辑
拖鞋 发表于 2016-9-25 15:40 
这是逼我装win7 x64啊…
XP下可以使用OpenGL Driver v1.78啊，钩选GTE accuracy，除了画质比PeteOpenGL2Tweak2.4略有不如外，防抖效果是完全一致的
以下是作者对于PGXP原理的解释
The default behaviour of the PlayStation is a sort of reverse tessellation, or implicit mesh simplification. This image illustrates what's happening quite well.
All the triangles are being transformed but the low precision results in many vertices of small triangles getting the same position. This causes those triangles to collapse into lines or points, becoming degenerate, with an area of zero.You can see this happening in the image where groups of small triangles form simple squares, two or three triangles stretch as their vertices snap to the same few points while other triangles disappear altogether.
The PlayStation's GTE has a function to cull these degenerate triangles called NCLIP which also removes triangles that are facing away from the viewer (back-face culling). As PGXP calculates and stores vertices in high precision the implicit simplification doesn't happen but the default NCLIP behaviour still results in small triangles, that would have become degenerate, being culled. This is because the emulated game expects a low precision integer value which will be truncated to 0 for many small triangles.
To solve this PGXP calculates its own NCLIP result in high precision and then intentionally skews the results so that values that would become 0 are now rounded up to 1 or -1 before passing it back to the emulator. So technically, rather than creating more triangles from a mesh, it is preserving existing triangles that would otherwise be simplified out.
对于 Resident Evil: Survivor 开启PGXP，国外网友是这么说的
I think this game is great for showing PGXP, because it has many detailed textures in the walls and floors. Without PGXP, the slightest movement of the camera distort everything, and on cutscenes, you can really see how bad the character models "tremble" (the last custcene in the no PGXP video is the worse).
"Memory only" mode works very well here, although there are still some parts where the floors will "auto-align" as you walk on them, and also some "stair loading screens" with wobbly steps. |
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发表于 2016-9-25 15:36 · 广东
