Ian Curtis
5a8cddd09a
remove dead code
2024-07-13 12:14:54 +01:00
gm-matthew
3cf8a1fa94
Implementing texture NP values
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For some reason Model 3 uses vertex coordinates rather than texel coordinates to calculate mipmap levels
Revised microtexture implementation; results are very close to real hardware when running at native resolution with supersampling disabled
2024-07-05 15:57:25 +01:00
Ian Curtis
edb11dc223
Performance improvements
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The old texture code was being bottle necked by the texture reads. We mirrored the real3d texture memory directly, including the mipmaps in a single large texture. I *think* most h/w has some sort of texture cache for a 2x2 or 4x4 block of pixels for a texture. What we were doing was reading the base texture, then reading the mipmap data from a totally separate part of the same texture which I can only assume flushed this cache. What I did was to create mipmap chains for the texture sheet, then copy the mipmap data there. Doing this basically doubles performance.
2024-06-13 13:36:30 +01:00
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
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
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
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
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
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
3eeec35e7c
Correctly emulate the real3d pro-1000 texture modes in our shader.
2018-10-13 13:29:45 +00:00
Ian Curtis
7bcc70a170
Update makefile
2018-10-01 17:42:45 +00:00
Ian Curtis
b5f9ad9651
Quad rendering engine. Set QuadRendering = 1 in the ini file to use, or -quad-rendering at the end of the command line to use.
2018-09-13 12:50:34 +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
Ian Curtis
c1e0e3728b
optimise hash function and parse out transparency layer select bit
2018-05-28 11:59:48 +00:00
Ian Curtis
c6b86c0812
Render the opaque part of texture transparency in the first pass. Fixes numerous transparency related issues in lemans24 and some in ocean hunter. I don't really know if this is the 'correct' way of solving this because the real3d pro-1000 is a complete black box. There is still a lot we don't understand about how it handles transparency.
2018-05-02 20:10:02 +00:00
Ian Curtis
8266eecabb
Parse out line of sight position. Only known to be used by scud.
2018-01-15 21:27:21 +00:00
Ian Curtis
9bac7836ed
add missing header
2017-09-30 19:05:04 +00:00
Ian Curtis
266c911133
Optimise vertex data to cut down on unnecessary copying
2017-08-30 21:45:25 +00:00
Ian Curtis
165926aa06
Modern hardware does backface culling in window space by calculating the face normal for the polygon, then doing a dot product against the view vector. The real3d pro-1000 on the other hand passes a pre-calculated face normal for each polygon which is used for culling. We were using this face normal to rewind the polygons so that regular backface culling would work. This worked 99.9% of the time. However this was failing on some models in Virtua Striker. The reason was because the pre-calculated face normals being passed were actually completely different to the actual face normals for the poly (not just inverted like you would expect). This broke our code. The solution was to emulate face culling directly in the vertex shader using the pre-calculated face normals directly. Only minimally tested this but hopefully there are no obvious regressions.
2017-08-29 10:27:29 +00:00
Ian Curtis
cd5978773a
Harry made some important discoveries with regards to fixed shading on the model 3 (per vertex poly brightness values). Firstly values are allowed to be negative, and they are used as a drop in replacement in the standard lighting equation for the normal dot light vector. This quite radically changes the brightness in LA Machine guns, but now correctly matches the arcade.
2017-08-19 20:06:31 +00:00
Ian Curtis
2422caadc6
Pad struct and align on 4 byte boundary.
2017-08-15 20:45:08 +00:00
Ian Curtis
eac76f0908
simplify
2017-08-14 23:30:34 +00:00
Ian Curtis
c12e4c3215
Fixed shading (per vertex poly colours) on step 1.5 hardware have the viewport ambient value added to them. This fixes various shading on scud. To do this had to switch the maths to the vertex shader.
2017-08-14 09:14:06 +00:00
Ian Curtis
5709ee2659
Sometime ago I managed to work out that specular on the model3 is not real specular, and really is just an extension of diffuse lighting. But attempts were derailed by corner cases and the fact we were not handling the normals correctly. Anyway Harry managed to successfully come up with an algorithm, and coefficients that give an almost perfect match to specular on the model3, based soley on observations from video footage! He also worked out that the lighting on hardware 1.5 onwards appears to be unclamped (ie greater than 1). This quite radically changes the brightness of some of the games, but much better matches the original hardware.
2017-08-09 16:56:56 +00:00
Ian Curtis
3fc28159eb
Add the unclamped light model we know exists to the shaders.
2017-08-03 10:41:18 +00:00
Ian Curtis
9aa3f13777
We were force normalising the result of matrix * normal, which looked correct in most cases. But this didn't preserve the scaling of the matrix, or the scaling of the model normals which resulted in many over bright areas. On it's own this generally worked, but games like Star Wars looked quite broken. Harry correctly figured out if you scale these normals by the scaling value that is sometimes present in the culling nodes the lighting looks correct. Still more work to do to correctly figure out the model3's lighting model.
2017-07-29 16:30:30 +00:00
Ian Curtis
a9b49c1676
Implement unclamped light model based upon Harry's findings. Unknown how this is turned on/off.
2017-07-22 17:15:14 +00:00
Ian Curtis
45741b24d2
rewrite scroll fog logic
2017-05-06 16:47:31 +00:00
Ian Curtis
101e43213e
cosmetic
2017-04-05 19:32:01 +00:00
Ian Curtis
edfb521a9b
Daytona seems to use this completely undocumented feature of the real3d pro-1000, the ability to invert texture colours. This patch fixes the colours on the cars, and the signs which should flash by alternating their colours.
2017-04-05 17:57:38 +00:00
Ian Curtis
f0e00c5dc7
Rewrite the spot light code, and implement the missing fog logic. (HarryTuttle)
2017-04-02 21:03:59 +00:00
Ian Curtis
5b9741bd5d
Support high priority polygons. They are treated as a separate overlay plane by the h/w. Fixes some missing fx in harley.
2017-02-20 17:22:32 +00:00
Ian Curtis
24cbeed526
Dynamically calculate near/far frustum planes for each viewport priority layer by clipping the overlapping meshes with the 4 frustum planes. A bit brute forcy, but the results are great.
2017-02-07 14:05:03 +00:00
Ian Curtis
144125a62e
mark the nodes without valid distances set
2017-02-05 15:36:05 +00:00
Ian Curtis
2c23268d88
Support microtexture relative scale. The exact scaling values are not known, but a 2x difference between each level seems highly likely. We know from visual inspection from scud that the first level is exactly 4. The SDK has a function that accepts a float input for scale and does this. lod = (1/scale) + 0.5. If lod>3 lod = 3. So this is our best guess.
2016-12-09 14:13:46 +00:00
Ian Curtis
483ba2f398
Fix the shading in scud. When lighting is disabled the fixed shading intensities appear to be offset values added to the colour value.
2016-11-11 17:50:27 +00:00
Ian Curtis
ef11990d19
Parse out scrollfog value used for blending over the 2d background.
2016-10-08 15:41:16 +00:00
Ian Curtis
c3581c9fe8
Support multiple microTextures, fixes crazy texturing in sega ski champ. I'm assuming microtextures are always located on the other memory bank to the base texture. This logic seems to work for all our games anyway.
2016-10-06 01:37:29 +00:00
Ian Curtis
c2b1db11f8
Cull geometry based on the culling distances in the nodes. Should give some sort of speedup on lower end pcs where the CPU is predominantly the bottle neck.
2016-06-16 20:05:29 +00:00
Ian Curtis
48a79a8f14
cleaning
2016-06-10 10:18:47 +00:00
Ian Curtis
36074d9fd5
Y texture offsets are just 5 bits. Texture coordinate wrap around happens in the same texture sheet, not into the next one. Fixes various texturing bugs in sega rally.
2016-05-30 13:25:00 +00:00
Ian Curtis
2086b1c9af
Stencil layered polys, fixes shadow z fighting in some of the games. Other games maybe using stipple alpha (yuck), not sure yet.
2016-05-27 19:30:40 +00:00
Ian Curtis
bc08276d60
preliminary specular
2016-05-15 16:24:49 +00:00
Ian Curtis
ded3168060
Split face colour from per vertex poly colour. Fixes colour bleeding between connected polys in harley.
2016-05-07 15:28:04 +00:00
Ian Curtis
c545b9fd85
preliminary microtexture
2016-05-04 00:35:07 +00:00
Bart Trzynadlowski
1d4f5c871d
Fixed Types.h include
2016-04-04 03:43:55 +00:00
Ian Curtis
4992e59673
Cache rom models, for better performance.
2016-03-26 22:44:26 +00:00
Ian Curtis
f031e5d095
finish front/back face culling code based on matrix determinant. Optimised opengl to avoid redundant state changes.
2016-03-22 23:39:59 +00:00
