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
Ian Curtis
8778f98c4a
Add missing edge on transluency function
2023-11-17 15:50:04 +00:00
Ian Curtis
8dda8e9105
Fix the line of sight function.
...
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
toxieainc
4961951a89
fix a real error (m68kdasm) and some harmless performance warnings and use modern headers
2022-07-11 18:10:41 +02:00
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
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
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
7497e3f1a6
forgot parentheses
2018-05-29 14:54:23 +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
8e13c3bbb9
Finish the hash function (Harry Tuttle)
2017-10-19 20:48:53 +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
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
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
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
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
2ae2010ee4
Add high priority poly function. Used by harley.
2017-02-18 23:58:08 +00:00
Ian Curtis
4a116190b5
When the translator map?? bit is enabled the colour format seems to be 4-5bit. Max observed value is 16. Scaling these values up seems to produce the correct colours in harley and dirt devils.
2017-02-16 17:20:42 +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
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
9bc1fbf0cb
remove dead code
2016-06-02 21:26:50 +00:00
Ian Curtis
ff8e9d6aad
Check for overflow. Fixes some fade effects
2016-05-30 23:10:56 +00:00
Bart Trzynadlowski
5c1a240565
New engine: expanded color indices to 12 bits from 11. Added PolygonHeader::ColorIndex and SensorColorIndex methods.
2016-05-28 20:49:10 +00:00
Ian Curtis
661f19be19
fix transparency values, values are from 0-32, not 0-16 where the top bit disables
2016-05-27 22:20:57 +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
9e279a0c1f
Non luminous polygons seem to be effected by the lightModifier also. API seems to have no restriction in this regard, neither does the SDK. The ocean hunter requires this for some of the 2d stuff. Light modifier values only seem to exist between 0-16, which is strange for 5 bits of precision. Possibly top bit disables the effect and lower 4 bits are the value. This clearly differs from the SDK, but without this the values come out clearly wrong.
2016-05-16 10:49:00 +00:00
Ian Curtis
bc08276d60
preliminary specular
2016-05-15 16:24:49 +00:00
Ian Curtis
e295ad6868
double up polys for two sided polys, fixes some diffuse lighting problems
2016-05-13 08:39:48 +00:00
Ian Curtis
69a44a5d5f
add texture helper functions
2016-05-07 18:57:06 +00:00
Ian Curtis
05e1e4de37
update poly header class
2016-05-06 15:00:12 +00:00
Ian Curtis
b2da849d90
support flat shading
2016-05-05 00:01:17 +00:00
Ian Curtis
c545b9fd85
preliminary microtexture
2016-05-04 00:35:07 +00:00
Ian Curtis
c459772f8e
wrap invalid texture sizes, seems to fix bad textures in srally2 (skid marks)
2016-05-01 19:52:02 +00:00
Ian Curtis
23a5839d46
Daytona seems to use 3 bits for texture transparency, will figure it out later but for now this works
2016-04-30 09:02:38 +00:00
Ian Curtis
c499e6640c
fixed shading code
2016-04-29 23:03:46 +00:00
Ian Curtis
09e27e3082
color flag
2016-04-27 16:42:31 +00:00
Ian Curtis
3e8439c09c
fix model normals, add code for fixed shading, as of yet flag to turn it on is unknown
2016-04-26 09:06:48 +00:00
Ian Curtis
3bc2794b0a
Use the correct texture enable bit
2016-04-03 16:10:40 +00:00
Ian Curtis
4992e59673
Cache rom models, for better performance.
2016-03-26 22:44:26 +00:00
Ian Curtis
0327db246f
WIP
2016-03-24 13:17:17 +00:00
Ian Curtis
93f6b01e0b
Update project to vs 2013. Clean compile warnings
2016-03-22 12:30:23 +00:00
Bart Trzynadlowski
34301e97e1
Adding new 3D engine by Ian Curtis. Old engine moved to Graphics/Legacy3D/.
2016-03-21 04:10:14 +00:00
