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
Ian Curtis
864bb36b5a
Technically backface culling should cull polys when the dot product = 0, since when it equals 0 the polys is perpendicular to the camera and thus invisible. When you complete sega rally2 (if you can get that far lol) the champagne is invisible. The reason is because all the face normals are 0. So when multiplied by the model matrix they are still 0 and get culled. Tweaking the condition to only cull polys when greater than 0 fixes this, and allows these 'bad' polys to render as they do on the model3.
2019-01-16 01:07:56 +00:00
Ian Curtis
6075352868
Optimise depth calculation for quad shader.
2018-11-27 20:43:27 +00:00
Ian Curtis
538a714086
Fade out microtextures with higher textures LODs. Fixes incorrectly applied microtextures in LA machineguns.
2018-10-23 00:16:23 +00:00
Ian Curtis
bf4d725970
Smooth texture repeat makes no sense for alpha/contour textures with pixel dilate. HW seems to treat them as non smooth anyway. Also implement some line of sight stuff, used by Scud. Really need to check the threading/synchronisation of the register reads but it basically works.
2018-10-19 20:59:46 +00:00
Ian Curtis
42eaa7f3d8
fix copy paste error :]
2018-10-14 10:05:24 +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
3dbfa73734
Both lemans24 and dirt devils are rendering some totally transparent objects as the first model in each viewport. The HW seems to skip these entirely, and including them breaks our near/far plane calculations leading to Z fighting.
2018-09-19 20:43:41 +00:00
Ian Curtis
e3255e45f3
Tweak the ratio for the near plane. Fixes missing text on the map indicator at the start of spikeout. The vertices are 0.003 units apart so a tonne of precision is required at the near plane to not depth test out.
2018-09-18 21:46:38 +00:00
Ian Curtis
c5b156d95d
remove debug code
2018-09-18 21:20:15 +00:00
Ian Curtis
5dab9910e2
avoid double matrix load
2018-09-16 08:43:13 +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
e4f5f0bcaf
Sega bass fishing is starting some off the meshes with a shared vertex. Without having a previous vertex to share with, the values were just uninitialised and junk. The hardware itself seems to hold the value from the previous mesh, and sega bass fishing relies on this undefined behaviour to function correctly. Storing the cached vertices as member variables instead of locally to the function means it holds the values from the last mesh, and uses those values instead of random garbage.
2018-09-02 21:36:24 +00:00
Ian Curtis
c1c2dedcfa
remove dead variable
2018-08-09 21:57:51 +00:00
Ian Curtis
9f5a19a04a
Use correct PCI IDs (Harry Tuttle)
2018-07-09 08:06:06 +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
f9be1259c0
Opaque polys definitely depth test with less than or equal. Virtua striker is drawing co-planar polys for the bar gfx
2018-06-17 11:30:01 +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
7497e3f1a6
forgot parentheses
2018-05-29 14:54:23 +00:00
Ian Curtis
f9f43ca66b
2018-05-28 12:55:13 +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
2af58f4352
select correct bit ..
2018-05-24 20:19:54 +00:00
Ian Curtis
8452d4c0ef
Parse out TranslucencyPatternSelect
2018-05-24 20:13:15 +00:00
Ian Curtis
4d275ba49e
Parse siblings after children. It's the only way to get Daytona water fall to look correct without h/w poly sorting.
2018-05-03 18:37:49 +00:00
Bart Trzynadlowski
3f9b1b76e5
Added a stretch mode (-stretch) and modified new renderer's viewport code (hopefully correctly) to handle aspect ratio correction and widening the way the legacy one does.
2018-05-03 03:46:44 +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
11a3cdbfd1
remove unnecessary copies
2018-04-24 13:51:53 +00:00
Ian Curtis
d21e71dced
work around for non working jtag code in star wars
2018-03-21 10:26:05 +00:00
Ian Curtis
b184ca3e1b
Clamping must be applied before the spotlight is applied on step 1.0 h/w.
2018-03-10 09:13:28 +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
99b5b9ba1b
make the logic a bit clearer
2018-01-15 14:40:59 +00:00
Ian Curtis
22a6166b82
fix Ian's bad maths :)
2018-01-15 13:08:39 +00:00
Ian Curtis
a1350d95a2
Update microtexture coordinate logic (Harry Tuttle)
2018-01-14 12:56:24 +00:00
Ian Curtis
863ea95013
simplify maths
2018-01-10 20:37:21 +00:00
Ian Curtis
adb5196625
comment out unneeded code
2018-01-10 16:12:33 +00:00
Ian Curtis
d708ce9ba2
top/bottom were swapped for off axis projection
2018-01-10 16:08:02 +00:00
Ian Curtis
6efa03112e
Rewrite projection maths based upon previously unknown viewport values. The previous values used roughly worked as the normals for frustum planes. Perhaps they were only used for culling and not actually rendering, as sometimes the values don't work correctly.
2018-01-08 18:35:42 +00:00
Ian Curtis
cc28d5f00e
Implement sub 8x8 tile encoding. Fixes incomplete mipmap chains which previously only went down to 8x8 pixels before. It wasn't known these textures existed before. (Harry Tuttle)
2017-12-17 22:25:50 +00:00
Ian Curtis
cede67468c
Fix some bad/missing textures in fighting vipers. The game is referencing totally illegal texture sizes. The real h/w was just handling it somehow, whilst we were returning null for the textures. This might produce junk textures for the lower mipmaps, but this can be clamped in a later update.
2017-12-13 01:21:25 +00:00
Ian Curtis
62d9584b0d
Shift fog maths to fragment shader to fix bug in virtua on.
2017-11-23 17:51:51 +00:00
Ian Curtis
bddc86aba9
The vertex shader is run before clipping is done. If fogging values are calculated and clamped in the vertex shader it can interpolate bad values, since the range has been truncated. This happens if the polys overlap the near plane. The solution to clamp the values in the fragment shader. This fixes a bunch of fogging errors I long thought were transparency related errors in the ocean hunter.
2017-11-20 22:21:15 +00:00
Ian Curtis
bc7f1e9fac
Fixed shading also works with untextured polys. Fixes some shading issues in La machineguns. (Harry Tuttle)
2017-11-07 00:15:57 +00:00
Ian Curtis
df44ad458b
Update step 1.5 luminous logic with Harry's findings. Fixes various shading issues.
2017-11-05 13:25:33 +00:00
Ian Curtis
8e13c3bbb9
Finish the hash function (Harry Tuttle)
2017-10-19 20:48:53 +00:00
Ian Curtis
7f6df0cc84
Remove fixed shading check from specular.
2017-10-07 12:39:30 +00:00
Ian Curtis
eb798ed15e
Star wars is the only game to pass unsigned fixed shaded values (per vertex brightness) to the renderer. Originally we thought that the specular flag would turn on unsigned values since it's the only game to set specular with these polys, but this logic turned out to be incorrect. The JTAG interface seems to config the GPU to turn on this functionality. (Harry Tuttle)
2017-10-05 19:15:00 +00:00
Ian Curtis
43cf6b3bbf
update spotlight code (Harry Tuttle)
2017-10-05 18:49:08 +00:00
Ian Curtis
9bac7836ed
add missing header
2017-09-30 19:05:04 +00:00
Ian Curtis
0afd9026dc
Fix the sky in one of the levels in virtua on. The problem was caused by the fact we didn't split the mesh by the fog % burn through, so all the polys had the same value. We could use a vertex attrib, but % burn through fog is so rarely used and when it is, normally every poly in the mesh has the same value.
2017-09-26 00:30:08 +00:00
Bart Trzynadlowski
55bb02d4e5
- New work-in-progress frame timing code (disabled by default, compile with NEW_FRAME_TIMING defined to activate it)
...
- New JTAG emulation, moved into its own class, CJTAG
- Removed game-specific sun clamp hacks from CNew3D (JTAG and Real3D emulation will call the appropriate method to configure this at run-time)
- Removed JTAG from Real3D save state data and reused some of that space for new state variables having to do with the internal JTAG-based config as well as new frame timing state variables
2017-09-24 20:52:48 +00:00
Ian Curtis
a3e2fb7906
Calculating the length of the vertex results in quite broken values for fogging when the vertices are traversing the view frustum. The hardware also wouldn't have been doing a square root per vertex for fogging. Simply using the z values is enough. Todo check clamping of values for the near/far planes.
2017-09-06 13:07:39 +00:00
Ian Curtis
2786d95795
add interface for sun clamp
2017-09-02 14:54:16 +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
50d1f95648
Changed fixed shaded logic for step 1.5 hw based upon Harry's findings
2017-08-25 22:40:39 +00:00
Ian Curtis
b21ed49512
cosmetic
2017-08-21 23:00:29 +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
0efd4dac39
Finish fixed shading for 2.0 hardware. I'm pretty sure it actually works identically to step 1.5 hardware. The oddball is LA machine guns where the viewport ambient doesn't seem to effect the brightness. But the ambient works differently in this game because it uses the unclamped light model. Still need to investigate if the diffuse factor effects fixed shading.
2017-08-15 23:21:57 +00:00
Ian Curtis
b1cc9a615d
With fixed shading, when lighting is disabled, fixed shading appears to be a flat shaded version based upon the poly colour, instead of per vertex attributes.
2017-08-15 20:50:36 +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
81188bee07
fixed shading doesn't effect the alpha channel
2017-08-14 16:10:26 +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
8f622714a7
Fix attribute locations. glBindAttribLocation must be called linking
2017-08-11 11:59:41 +00:00
Bart Trzynadlowski
a315627401
Added support for loading shaders from files for new engine and tile renderer. Changed help text to reflect new engine being default.
2017-08-11 00:41:10 +00:00
Ian Curtis
d7403afda6
use generic vertex attributes
2017-08-10 15:43:03 +00:00
Ian Curtis
57d0a513fd
Technically matrix casts are only allowed in glsl 1.2 and later
2017-08-09 23:25:01 +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
1d338877fc
cosmetic
2017-08-03 11:05:04 +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
b1bd877b82
Ski champ for some reason is passing denormalised numbers for the modelscale. This is causing a NaN in our shader killing the lighting for these models, so we simply skip these, since they are essentially zero anyway. Thanks to Harry for finding this bug :)
2017-08-01 23:48:53 +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
2335f3173b
Use c++11 raw string literals
2017-07-08 10:55:14 +00:00
Ian Curtis
3efb055344
Clamp the ambient light to a max of 0.75. LA Machine guns seems to use an ambient value of 1, which is full bright for everything. But for some reason the hardware seems to treat this as ~ 0.75. This fixes various missing shading in the game. This doesn't seem to have any negative effects on other games I have tested. Clamping in the shader as we might need the full range of values for fixed shading.
2017-06-29 19:05:30 +00:00
Ian Curtis
9e9a549283
remove WIP code
2017-06-25 20:09:45 +00:00
Ian Curtis
ec3872d108
convert sun angle coordinate system outside of the shader
2017-06-25 19:50:02 +00:00
Ian Curtis
97781108e8
A second go at fixing the fixed lighting in star wars .. Fixed shading is per vertex poly colours. For some reason in star wars they are treated as unsigned values instead of signed, like in every other game. These polys are all marked with specular enabled, where as in the rest of the games they are missing this flag. That's the only difference I can find.
2017-06-21 17:04:53 +00:00
Ian Curtis
1532168af7
fix double offset
2017-06-20 21:44:58 +00:00
Ian Curtis
b00315b072
Revert previous fixed shading changes. Implement new logic for fixed shading on step 1.5 hardware based upon Harry's findings.
2017-06-20 20:13:42 +00:00
Ian Curtis
bb3c538808
remove debug code
2017-06-20 19:46:06 +00:00
Ian Curtis
260daa1b91
Fix the fix shading in star wars. Fixed shading still needs some work for mag truck and dirt devils to match the arcade.
2017-06-17 16:05:54 +00:00
Ian Curtis
73a7d2760d
cosmetic
2017-06-07 23:16:22 +00:00
Ian Curtis
1193069709
Tweak scroll fog logic again .. should fix missing 2d fogging in Spikeout.
2017-06-07 23:14:01 +00:00
Ian Curtis
45741b24d2
rewrite scroll fog logic
2017-05-06 16:47:31 +00:00
Ian Curtis
80004b0dad
Remove debug code
2017-04-25 00:31:39 +00:00
Ian Curtis
7694e4eb0c
minor culling node optimisations
2017-04-25 00:10:55 +00:00
Ian Curtis
ff936c588b
don't need cast, conversion is implicit
2017-04-20 19:46:40 +00:00
Ian Curtis
912bb0e7cf
better state handling
2017-04-20 19:43:41 +00:00
Ian Curtis
9b226ed478
parse out some culling node values
2017-04-17 10:40:07 +00:00
Ian Curtis
3c78571615
There are 2 bits in the polyheader labelled discard. When both are set ie in sega rally, the polygons are totally discarded. Scud seems to set bit 1 which seems halve the opacity.
2017-04-15 19:00:46 +00:00
Ian Curtis
21836c088c
The real3d has a flag that allows the hw to skip polygons so that they aren't rendered. Sega rally2 uses this for the dust effects. Triangles or quads that have this flag are junk, and look like random corruption if you try to draw them. We assumed polys that shared vertices with these bad polygons were also bad. It turns out the last few shared vertices in these polys were in fact valid, and thus the entire quad/triangle strip should be drawn and not discarded.
2017-04-14 23:41:11 +00:00
Ian Curtis
fc50bdee98
light parameters must be clamped (HarryTuttle)
2017-04-14 00:08:17 +00:00
Ian Curtis
391aafd4c1
Virtua fighter has a few massive polys that shouldn't be visible. It looks like these polys have a bad matrix, but the node distances are all zero. This means the bounding box that encapsulates them is of size zero. Skipping over these entirely seems to fix the issue.
2017-04-12 15:47:57 +00:00
Ian Curtis
101e43213e
cosmetic
2017-04-05 19:32:01 +00:00
