Ian Curtis
aecf61762e
Various fixes
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- Scroll fog needed a break statement otherwise it could draw potentially multiples times.
- The fog atttenuation paramater doesn't appear to effect scroll fog, other than to potentially enable it. This fixes some issues with emergency call ambulance.
- Added support for the node discard attributes which sega rally2 uses to throw away specific geometry. This fixes junk that starts to show up in the levels after multiple runs.
2023-11-05 17:39:23 +00:00
dukeeeey
628eeebbc3
Merge pull request #101 from gm-matthew/lod-and-blending
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Add LOD switching and blending out culling nodes
2023-11-03 19:56:17 +00:00
Ian Curtis
8dda8e9105
Fix the line of sight function.
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Polygons have a line of sight value that's either a 0 or 1. We write this value into the stencil buffer, then read the app can read it back to determine the polygon attribute is visible or not. The returned value is 1/depth value in world coordinates. The first bit of the float is actually a control bit, 1 indicates no geometry hit, 0 indicates geometry hit.
2023-11-03 13:24:59 +00:00
gm-matthew
483dbdda2e
Add LOD switching and blending out culling nodes
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We're not blending between LODs yet as we're not sure of the best way to implement it
Also implementing control bits for disable culling and enable model scale (needed for ECA and Harley)
2023-11-02 14:16:07 +00:00
Ian Curtis
3a85bd9e25
remove debug code
2023-11-01 16:03:11 +00:00
Ian Curtis
d16ba90856
Update comments for the culling node function. gm_matthew worked out that the last 2 bits of the model scale float appear to be control bits for disable culling and valid model scale. Strange logic but the line of sight (LOS) function does something similar by re-using float bits for control words.
2023-11-01 16:01:13 +00:00
Ian Curtis
f89da17f17
Fix white gfx on linux / intel gpus. These optimisations originally came from toxieainc
2023-10-27 10:45:16 +01:00
Ian Curtis
c5f9a3ad26
Amend the ambient fog logic to be disabled if fog density/start is set to zero. This fixes a regression where the sky stops drawing in lost world.
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Rewrite the scroll fog shader slightly. Scroll fog is a 2d layer, it has no depth, or can be considered to be drawn at infinity, therefore is not effected by the viewport light. The scroll attenatuion value also I think attenatutes the scroll fog alpha value. This fixes various effects in emergency call ambulance.
2023-10-24 10:17:15 +01:00
Ian Curtis
a214c6dae8
Prior scroll fog logic was nearly correct. For scroll fogging to draw it needs either a start value or a fog density value, but these can come from a different viewport if they have the same colour fog set. This fixes the credits in vf3 which sets scroll fog, but it never draws on the original hardware.
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For a long time we've had bug reports that in vf3 the background in the Dural levels was the wrong colour, it should have been much darker. We thought it was again missing scroll fog, but gm_mathew worked out it was actually coming from the fogAmbient paramater. Not only does it darken the fog, but it also has an effect on the 2d background from the tilegen, similar to scroll fog. This also fixes the sky in lemans24.
2023-10-22 21:07:35 +01:00
Ian Curtis
2af0787279
Remove debug code
2023-10-17 17:33:26 +01:00
Ian Curtis
79ddc8c739
Rewrite the logic for the scoll fog (render buffer clear colour). Each viewport can potentially have a scroll fog value so the logic of which value to pick wasn't immediately clear. TLDR I think it picks the highest value starting from the lowest priority layers. This fixes the sky in daytona battle on the edge.
2023-10-17 17:30:14 +01:00
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.
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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
d656643087
gm_mathew worked out that the camera flashes in sega rally 2 have the 'reset-matrix' attribute set inside the culling nodes, which was unsupported until now because we never found any games to have used this bit. The reset matrix is a bit strange, I would assume it would just reset the matrix back to identity, instead it seems to just reset the rotation back to identity whilst preserving the scale/position.
2023-09-27 16:33:53 +01:00
Ian Curtis
57ead6037d
Better opengl resource allocation. Fixes going fullscreen and back.
2022-12-17 23:46:02 +00:00
Ian Curtis
153c510009
Fix uniform location.
2022-11-26 12:58:07 +00:00
Ian Curtis
5f30614c4c
FIx shaders failing to build on apple h/w
2022-11-09 18:56:15 +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.
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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
Ian Curtis
b2e5a200da
Fix build for linux (just missing header)
2022-10-17 09:34:11 +01:00
Ian Curtis
f0872cc998
Upgrade the glsl shader class a bit. Add a const char* comparitor so we can use a map with a simple "string" key. Fine to use when performance is not critical.
2022-10-16 21:03:41 +01:00
toxieainc
e644751f01
after clarifications, minor cleanup
2022-10-10 16:35:02 -07:00
toxieainc
75771b3d14
remove 2 dupe function calls, where ProcessLos should actually be rather costly
2022-10-10 16:35:02 -07:00
Fernando Casas Schössow
412e9232d7
Fix new 3D engine texture2DLod function missing error on Linux/MESA. MESA requires needed extensions to be explicitly declared in code otherwise it will not enable them.
2022-10-10 16:30:09 -07:00
toxieainc
5f97e5af6c
address review
2022-10-03 17:59:59 -07:00
toxieainc
519d695f57
address review and move bit casts to new header
2022-10-03 17:59:59 -07:00
toxieainc
1b0e3be8dc
use correct slash
2022-10-03 17:59:59 -07:00
toxieainc
22ffb5cc19
Harmless math warning fixes. map->unordered_map in CNew3D::CacheModel. Avoid general aliasing problems (using bit_cast or the recommended/optimized-away memcpy).
2022-10-03 17:59:59 -07:00
toxieainc
d7041a83c9
fix missing version GLSL compiler warnings on startup
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happens (at least) on Intel drivers
2022-08-19 08:41:22 -07:00
toxieainc
6c24bf7c8f
Optimize quad rendering by replacing the double computations for the area computation with the equivalent shoelace algorithm along with kahans algorithm to compute the cross products. In addition pull out the /w to the end, which increases precision even more.
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Thus making the result similar to the fp64 version, tested e.g. with harleys first person mode (all artifacts still gone as before).
Improves perf on low end boards (e.g. Intel) dramatically (10fps with harley before, now 70 on my laptop), and even on higher end (e.g. NVIDIA laptop, quads are now faster than tri pipeline on my laptop).
2022-08-16 21:34:31 -07:00
toxieainc
4961951a89
fix a real error (m68kdasm) and some harmless performance warnings and use modern headers
2022-07-11 18:10:41 +02:00
Ian Curtis
0ef90899e1
Double buffer the line of sight values. Should allow the correct values to be returned if GPU threading is enabled.
2022-01-02 12:48:09 +00:00
Matthew Daniels
9ffce8b92a
Getting rid of most of the includes from Supermodel.h; each file now explicitly includes the header files it needs.
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Making changes to a header file should no longer force the entire project to recompile.
2021-11-22 17:15:06 +00:00
Ian Curtis
e3374256ff
Just a few compile warnings
2021-02-20 22:19:16 +00:00
Ian Curtis
75f8ee61a3
fix missing polys with quad renderer
2020-09-14 20:01:52 +00:00
Ian Curtis
38c3ff61f9
Clip scroll fog to viewport, instead of filling entire screen. Fixes fog bug in Daytona credits.
2020-09-08 09:10:24 +00:00
Ian Curtis
aaa26f678c
Update scroll fog logic. Should fix the credits in virtua fighter and daytona that have fogging applied to the background layer and shouldn't.
2020-09-07 16:25:18 +00:00
Ian Curtis
ba917aca6d
Update glew version
2020-07-31 19:18:51 +00:00
Ian Curtis
6f6c98c671
The translator map seems to work with paletted colour values too, and the result is not clamped. Colours are passed to the GPU as unsigned bytes to multiplying by 16 will overflow, so we do the logic in the shader. If we passed floats we could skip the shader logic.
2020-05-11 09:05:46 +00:00
Ian Curtis
e2ad593e88
When the translator map is enabled the colour values seem to use 4 bits, 0-16. Why not 0-31 I don't know. Anyway virtua on is overflowing these values for some of the smoke effects. For us the numbers were wrapping around. Clamping is enough to fix this. (Thanks model123)
2020-05-07 19:34:22 +00:00
Ian Curtis
5ace960f14
tweak value so the map indicator still works at the start of spikeout
2020-01-04 18:15:30 +00:00
Ian Curtis
6b8a29105a
Sutherland-Hodgeman clipping only works for planar primitives. Scud is rendering non planar quads and this breaks our algorithm a little when using the quad renderer. Stretching the near plane a few % is enough to fix it.
2020-01-04 13:48:14 +00:00
Ian Curtis
d711afade1
Only need to clip against 4 planes for poly culling
2020-01-04 13:45:55 +00:00
Ian Curtis
605dad2c02
Fix the sky in harley in first person mode where pixels in the sky are culled when they shouldn't be with the quad renderer. Basically we were running out of precision in a rare corner case. Doing the maths with double precision and casting back to float was enough to fix the issue.
2019-12-27 21:36:46 +00:00
Ian Curtis
a5858e635d
To calculate the mipmap value the opengl needs to calculate the difference in the texture coordinates between adjacent pixels. If there are no adjacent pixels the hw may need to spawn invisible fragments outside of the visible polygon. Our algorithm was culling these out so the mipamp calculation failed for edge pixels. Anyway this fixes quad rendering looking broken with the latest nvidia drivers.
2019-12-10 11:40:39 +00:00
Ian Curtis
06688de5fc
Really should cull against 5 frustum planes.
2019-11-15 20:00:25 +00:00
Ian Curtis
06b43c45b3
Ocean hunter in the middle of the game is passing a few matrices with FLT_MAX inside them, which blows apart our near/far calculation. The hardware must have some method to sanitize the near/far for instance if you render something extremely close to the origin you will also blow apart any near/far calc.
2019-11-02 20:11:48 +00:00
Ian Curtis
714f6a123a
skip invalid culling nodes
2019-07-28 12:14:13 +00:00
Ian Curtis
17f4103123
A culling node must follow immediately after a viewport.
2019-07-26 16:39:58 +00:00
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
