Ian Curtis
f173c3c3ce
The hardware actually seems to treat the quad primitive as a triangle strip. The winding order can actually change between the first and second 'triangle' inside the quad, leading our code to incorrectly backface cull the 2nd triangle. So we must re-calculate the winding order for the 2nd triangle. This fixes a massive missing poly in the road in la machine guns, probably other games too. The hardware is unaffected by the winding order, as it doesn't calculate the poly normal from the vertices directly, instead it uses the provided normal in the poly header.
2017-02-21 23:35:40 +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
7407d03036
Put a check in there, in case near values come out really close to zero. Fixes a slight corner case in lemans24. A check probably should have been there originally :)
2017-02-08 16:14:50 +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
c82dc55485
cosmetics
2016-12-22 22:11:19 +00:00
Ian Curtis
72dd0dbf98
only need to cull against 4 clipping planes
2016-12-22 22:09:13 +00:00
Ian Curtis
20a9514aa2
For scroll fog set the viewport to the entire area, allows fog to work in widescreen mode
2016-12-15 19:27:08 +00:00
Ian Curtis
ca7046729e
properly cache un-normalised texture coordinates, fixes a texturing regression in Daytona
2016-12-15 12:10:52 +00:00
Ian Curtis
f355e2d062
fix microtexture colours
2016-12-15 00:45:32 +00:00
Ian Curtis
89e75a9803
Only check scroll fog value from the first viewport from each priority layer. Seems to fix problems with background fogging.
2016-12-14 19:57:05 +00:00
Ian Curtis
707e945db9
delete unused files
2016-12-09 14:15:11 +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
da8b63b44b
The model3 shares vertices between polygons. But it also seems to do this for polygons with different textures. This means the texture coordinate for potentially different sizes textures is shared. Currently this was broken leading to some corrupted looking textures. The fix is to simply cache the old texture coordinates, and recalculate the normalised coordinates in the new texture coordinate space.
2016-12-06 14:39:46 +00:00
Ian Curtis
10a5d2c0e1
refactor
2016-12-06 12:25:34 +00:00
Ian Curtis
eece2d75b4
tweak scroll fog logic
2016-12-04 22:37:49 +00:00
Ian Curtis
adbebb0204
clean up
2016-12-04 22:37:22 +00:00
Ian Curtis
a310e8e5cf
minor optimisations
2016-11-28 17:32:25 +00:00
Ian Curtis
abc8c24b69
Only check the geometry for culling with valid node distances. We will need this later.
2016-11-27 19:30:46 +00:00
Ian Curtis
fe60d115d2
Revert changes .. if we clip against the real3d clipping planes, our wide screen hack won't work anymore.
2016-11-26 01:19:51 +00:00
Ian Curtis
665fa90425
Get clipping planes directly from the viewport data. Also no need to clip against a far plane
2016-11-26 01:12:08 +00:00
Ian Curtis
54c405709f
Need to walk back in memory and check the previous texture tiles to see if they overlap with the current textures being invalidated. If they overlap they must be cleared too. Algorithm is a bit brute forcy and more expensive than I'd like but it fixes the bad textures in Spikeout.
2016-11-22 20:30:10 +00:00
Ian Curtis
84ae8f035c
Skip processing the mipmap section of memory. The real3d doesn't create mipmaps down to 1x1 that is needed to do mipmapping properly on modern hardware anyway.
2016-11-21 09:04:56 +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
2f49012786
change scroll fog logic to parse the lower priority viewports first
2016-10-09 18:10:57 +00:00
Ian Curtis
f0a15febd1
implement scroll fog, fixes a tonne of missing fx
2016-10-09 16:34:12 +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
33e795de9b
Fix scenes with missing fog in ocean hunter. The game was passing negative fog densities. The sign seems to be ignored by the model 3.
2016-10-08 15:15:25 +00:00
Ian Curtis
9eeb81ac69
same fix for legacy engine
2016-10-08 12:10:47 +00:00
Ian Curtis
33cf6c89d1
our scratch mem must match correct max texture size
2016-10-08 11:59:25 +00:00
Ian Curtis
c472d90fb9
Fix the sky in advanced stage in Dirt Devils. It uses a massive (for 1998 :p) 1024x256 texture.
2016-10-06 20:10:45 +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
Bart Trzynadlowski
458684eb22
Fixed new 3D engine's fragment shader to work on some older GPUs by reducing the number of discard statements to one
2016-08-24 22:21:18 +00:00
Bart Trzynadlowski
0ab486645c
Updated Fragment_NoSpotlight.glsl (fragment shader for legacy engine without spot light)
2016-07-04 01:00:24 +00:00
Ian Curtis
732bff2769
disable spot light if the extent is zero
2016-06-29 20:53:19 +00:00
Ian Curtis
efa7776871
parse some unimplemented spot light values from viewport
2016-06-27 17:35:27 +00:00
Ian Curtis
d058a29ac8
stencil translucent non textured polys
2016-06-19 23:33:06 +00:00
Ian Curtis
85c4d85562
refactor
2016-06-19 21:43:09 +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
d799c63b1a
cache bound texture
2016-06-10 11:29:20 +00:00
Ian Curtis
48a79a8f14
cleaning
2016-06-10 10:18:47 +00:00
Ian Curtis
8440bc7f03
support negative exponent
2016-06-03 09:33:46 +00:00
Ian Curtis
5081ee99dc
Add code to convert the 16bit float format used by the hardware back into float 754 format. 16bit floats are used for the culling radiuses in the nodes.
2016-06-03 00:01:34 +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
9a49fefe12
Legacy engine: fixed texture offsets (VON2 was broken by last commit). Texture coordinates are wrapped within the bank first and then the bank can be swapped. This also allows the full range of texture coordinate bits to be used as specified in the Pro-1000 SDK.
2016-05-30 19:18:11 +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
Bart Trzynadlowski
d1f49675b1
Legacy engine: Culling node texture Y offset is only 5 bits (fixes Sega Rally 2 initials decal)
2016-05-29 20:49:28 +00:00
Bart Trzynadlowski
2ee0d9018e
New engine: modf -> std::modf (fixes compilation on gcc)
2016-05-28 20:54:25 +00:00
Bart Trzynadlowski
1a908dd414
Legacy engine: expanded color index to 12 bits from 11. Does this affect any games?
2016-05-28 20:50:05 +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
Bart Trzynadlowski
2ef5203839
Forgot to describe one polygon header field in Model.cpp
2016-05-28 20:40:45 +00:00
Bart Trzynadlowski
e4a5c341dd
Updated polygon header descriptions
2016-05-28 20:33:10 +00:00
Bart Trzynadlowski
0ebb8d5d47
Legacy engine: Added stencil buffering for layered models and shadows. Not as accurate as new engine because stencil buffering is applied per-model rather than per-polygon, so the entire model must consist of stencil-tested polygons. In practice, though, this seems to work fine.
2016-05-28 19:52:30 +00:00
Ian Curtis
ce03c13847
Optimise non smooth texture repeat to only effect texture boundaries, rather than poly boundaries. Fixes a few ugly artefacts
2016-05-28 13:21:35 +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
3f9936d664
don't clamp after spot light code, looks much closer to h/w
2016-05-26 09:06:09 +00:00
Ian Curtis
89c987fae1
basic spotlight code
2016-05-26 00:08:12 +00:00
Bart Trzynadlowski
a0910f96fb
Fixed fog in legacy 3D engine. Now computed same as new engine, with 4-bit light modifier and corrected fog mixing in shaders.
2016-05-25 04:00:02 +00:00
Bart Trzynadlowski
6dc35f9563
Updated legacy engine vertex shader to use specular shininess and coefficient along with old equation. Still not correct (too strong compared to the old method).
2016-05-25 03:10:36 +00:00
Ian Curtis
c5ce2b9679
fix alpha testing for texture format 7
2016-05-22 19:17:15 +00:00
Ian Curtis
65d6342947
remove dead code
2016-05-21 16:26:00 +00:00
Ian Curtis
fd3eb49369
support 4 bit textures
2016-05-21 15:50:54 +00:00
Ian Curtis
e108b56664
correctly mask pointers
2016-05-19 22:23:50 +00:00
Ian Curtis
a79fd2786a
optimise hash table access for better performance
2016-05-19 19:04:44 +00:00
Ian Curtis
ff8d311dcc
support colour table pointer
2016-05-18 23:06:41 +00:00
Ian Curtis
7e3c097a31
remove debug code
2016-05-16 17:26:53 +00:00
Ian Curtis
828fd8ebb4
Fog start is apparently the fog value at the viewport (0,0,0) I guess like an ambient value. Default value is negative
2016-05-16 17:10:04 +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
62eafacfc3
adjust (hopefully correct) fog equation
2016-05-16 10:44:16 +00:00
Ian Curtis
bc08276d60
preliminary specular
2016-05-15 16:24:49 +00:00
Bart Trzynadlowski
c9147bc93d
- Removed a stale comment
2016-05-14 06:31:44 +00:00
Bart Trzynadlowski
897b1acb21
Legacy renderer changes:
...
- Updated shading model. Unfortunately, it is far from perfect but it seems to be the best I can do for now. Not really much of a difference from before except that the Scud Race castle is fixed at the expense of the Yosemite level in LA Machineguns being too bright.
- Added lots of notes in the shading code.
- Passing both specular coefficient and shininess to shader. This will probably break specular lighting for now until the shader is updated to use the shininess correctly.
- Color table address in polygon RAM is now obtained from culling nodes as they are traversed (found this in the Pro-1000 SDK).
2016-05-14 06:25:35 +00:00
Ian Curtis
c4b5b185c6
Disable light modifier on fog, seems not to work .. values don't make sense. Maybe the model3 doesn't use these.
2016-05-13 19:26:10 +00:00
Ian Curtis
c8f8cd1655
remove dead code
2016-05-13 08:40:53 +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
Bart Trzynadlowski
ddf3d5213d
FLT_MAX -> std::numeric_limits<float>::max()
2016-05-10 03:08:36 +00:00
Ian Curtis
34c81eabee
update header documentation
2016-05-09 16:53:12 +00:00
Ian Curtis
43add90d2f
Fix bad texture seems
2016-05-09 16:26:34 +00:00
Bart Trzynadlowski
846c9d0edd
Reverted stencil mask change. This reintroduces the Scud Race 'ROLLING START' bug. Previous 'fix' did not work for Magical Truck Adventure anyway and also broke some games (Daytona 2 transmission and course select screen, ECA title screen). The stencil mask is not shifted by 16 pixels and I suspect that either there is some unknown trick to horizontal scrolling or that the behavior is affected by hidden raster timing registers hidden in the JTAG interface.
2016-05-08 21:17:02 +00:00
Bart Trzynadlowski
9249eaa29f
Fixed logic for clearing bottom layer. Added new functions to 2D renderer interface. Avoid drawing top and bottom surfaces when no layers are present there. Added some comments to tile
2016-05-08 19:27:08 +00:00
Bart Trzynadlowski
5d048958b9
Rewrote 2D renderer and fixed 2D layer priorities, stencil mask clipping (Scud Race 'ROLLING START'), and cleaned up code. Unfortunately, the new code is about 50% slower, mostly due to the need to perform stencil clipping after scrolling.
2016-05-07 21:54:03 +00:00
Ian Curtis
69a44a5d5f
add texture helper functions
2016-05-07 18:57:06 +00:00
Ian Curtis
242cddac2d
remove pointless loop
2016-05-07 15:45:02 +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
05e1e4de37
update poly header class
2016-05-06 15:00:12 +00:00
Bart Trzynadlowski
fee1cfb126
Fixed compilation on gcc (gotos cannot cross variable declarations)
2016-05-05 22:01:59 +00:00
Ian Curtis
da4bab5f9b
Flat shaded polys can't share vertex normals with adjacent connected polys. Fixes some bad lighting in Harley on pavements
2016-05-05 08:06:06 +00:00
Ian Curtis
b2da849d90
support flat shading
2016-05-05 00:01:17 +00:00
Ian Curtis
3693a51cbb
Make sure texture is bound to correct texture unit, stop flashing micro textures in daytona
2016-05-04 16:30:15 +00:00
Ian Curtis
b0569007ef
set correct microtexture wrap mode
2016-05-04 10:30:58 +00:00
Ian Curtis
c545b9fd85
preliminary microtexture
2016-05-04 00:35:07 +00:00
Ian Curtis
396fba7d24
skip viewports marked as disabled, might stop parsing some bad data
2016-05-03 21:17:37 +00:00
Ian Curtis
6d1aa4d527
fix compilation
2016-05-03 18:38:06 +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
7ec7906c0f
Turn off lighting if fixed shading (or no normals) flag is present. Fixes some of the lighting weirdness in scud
2016-04-30 20:32:44 +00:00
Bart Trzynadlowski
48767b2267
Legacy engine: fixed per-vertex fixed shading to incorporate Ian's findings that the intensity value is signed and that fixed shading applies only when lighting is enabled
2016-04-30 16:23:25 +00:00
