10 commits

Author	SHA1	Message	Date
gm-matthew	ac53101214	Implement LOD blending ... If two translucent polygons with opposing patterns overlap the result is always opaque Also the LOD scale calculation depends on Euclidean distance of x, y and z, not just z	2023-11-17 15:13:27 +00:00
Ian Curtis	86d477263f	Scroll fog is like a clear colour for the render target, but can be semi transparent as the tilegen layer can be shown underneath. I assumed that transprent polys would be drawn to the render target for transparent polys but unfortunately the logic does not work. So where else could it be drawn? Well with limited memory it must be draw to the buffer for opaque polys, which means this render target is also blended.	2023-10-15 17:16:52 +01:00
Ian Curtis	6595b9320e	Rewrite the renderer a bit to spit out the finished graphics from the 3d chip on separate buffers. One buffer is for opaque pixels, and 2 more for translucent pixels. Before the frame was composited on the back buffer, which meant the tilegen had to have been drawn first. This way the images are now totally independant of the tilegen chip so can be drawn as soon as the register write 0xC is written to the tilegen. ... Some games update the tilegen after the ping_ping bit has flipped at 66% of the frame, so we need to split the tilegen drawing up into two stages to get some effects to work. So having the tilegen draw independantly of the 3d chip can make this happen.	2023-10-14 20:05:00 +01:00
Ian Curtis	153c510009	Fix uniform location.	2022-11-26 12:58:07 +00:00
Ian Curtis	40c8259130	Rewrite the whole project for GL4+. I figured if we removed the limitation of a legacy rendering API we could improve things a bit. With GL4+ we can do unsigned integer math in the shaders. This allows us to upload a direct copy of the real3d texture sheet, and texture directly from this memory given the x/y pos and type. This massively simplifies the binding and invalidation code. Also the crazy corner cases will work because it essentially works the same way as the original hardware. ... The standard triangle render requires gl 4.1 core, so should work on mac. The quad renderer runs on 4.5 core. The legacy renderer should still work, and when enabled a regular opengl context will be created, which allows functions marked depreciated in the core profiles to still work. This will only work in windows/linux I think. Apple doesn't support this. A GL 4.1 GPU is now the min required spec. Sorry if you have an OLDER gpu. GL 4.1 is over 12 years old now. This is a big update so I apologise in advance if I accidently broke something :]	2022-11-07 21:33:01 +00:00
toxieainc	d7041a83c9	fix missing version GLSL compiler warnings on startup ... happens (at least) on Intel drivers	2022-08-19 08:41:22 -07:00
Ian Curtis	f634d19fdc	Fix shader. Why this worked on my nvidia card .. I'm not sure.	2019-01-24 19:11:26 +00:00
Ian Curtis	8094c2e2b7	Composite the alpha layers at the end of rendering. To do this we need to mask the alpha pixels with the opaque pixels from the next priority layer. Fixes some overlapping shadows in vf3tb that have different priority layers. I assume that was a game bug, but it works on the real h/w.	2019-01-21 14:30:42 +00:00
Ian Curtis	73ff32a10d	fix cast, and remove extra ; that had snuck into the shaders	2018-06-18 10:24:46 +00:00
Ian Curtis	c7ffd0a808	Draw transparent polys to separate layers and composite at the end. This solves a tonne of transparency errors we had been battling with for a long time. The model3 is strange in the fact it only supports a max of two translucent overlapped polys. They are not blended into the frame normally. Doing this means the topmost translucent polys only are visible in the scene, the equivalent of doing a depth pass first, but without the added cost.	2018-06-16 21:31:29 +00:00