Ian Curtis
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165926aa06
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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.
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2017-08-29 10:27:29 +00:00 |
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Ian Curtis
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b21ed49512
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cosmetic
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2017-08-21 23:00:29 +00:00 |
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Ian Curtis
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cd5978773a
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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.
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2017-08-19 20:06:31 +00:00 |
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Ian Curtis
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0efd4dac39
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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.
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2017-08-15 23:21:57 +00:00 |
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Ian Curtis
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2422caadc6
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Pad struct and align on 4 byte boundary.
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2017-08-15 20:45:08 +00:00 |
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Ian Curtis
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eac76f0908
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simplify
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2017-08-14 23:30:34 +00:00 |
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Ian Curtis
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c12e4c3215
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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.
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2017-08-14 09:14:06 +00:00 |
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Ian Curtis
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8f622714a7
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Fix attribute locations. glBindAttribLocation must be called linking
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2017-08-11 11:59:41 +00:00 |
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Bart Trzynadlowski
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a315627401
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Added support for loading shaders from files for new engine and tile renderer. Changed help text to reflect new engine being default.
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2017-08-11 00:41:10 +00:00 |
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Ian Curtis
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d7403afda6
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use generic vertex attributes
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2017-08-10 15:43:03 +00:00 |
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Ian Curtis
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5709ee2659
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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.
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2017-08-09 16:56:56 +00:00 |
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Ian Curtis
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3fc28159eb
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Add the unclamped light model we know exists to the shaders.
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2017-08-03 10:41:18 +00:00 |
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Ian Curtis
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b1bd877b82
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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 :)
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2017-08-01 23:48:53 +00:00 |
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Ian Curtis
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9aa3f13777
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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.
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2017-07-29 16:30:30 +00:00 |
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Ian Curtis
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a9b49c1676
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Implement unclamped light model based upon Harry's findings. Unknown how this is turned on/off.
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2017-07-22 17:15:14 +00:00 |
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Ian Curtis
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9e9a549283
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remove WIP code
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2017-06-25 20:09:45 +00:00 |
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Ian Curtis
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ec3872d108
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convert sun angle coordinate system outside of the shader
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2017-06-25 19:50:02 +00:00 |
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Ian Curtis
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97781108e8
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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.
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2017-06-21 17:04:53 +00:00 |
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Ian Curtis
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1532168af7
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fix double offset
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2017-06-20 21:44:58 +00:00 |
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Ian Curtis
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b00315b072
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Revert previous fixed shading changes. Implement new logic for fixed shading on step 1.5 hardware based upon Harry's findings.
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2017-06-20 20:13:42 +00:00 |
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Ian Curtis
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260daa1b91
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Fix the fix shading in star wars. Fixed shading still needs some work for mag truck and dirt devils to match the arcade.
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2017-06-17 16:05:54 +00:00 |
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Ian Curtis
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73a7d2760d
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cosmetic
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2017-06-07 23:16:22 +00:00 |
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Ian Curtis
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1193069709
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Tweak scroll fog logic again .. should fix missing 2d fogging in Spikeout.
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2017-06-07 23:14:01 +00:00 |
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Ian Curtis
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45741b24d2
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rewrite scroll fog logic
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2017-05-06 16:47:31 +00:00 |
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Ian Curtis
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80004b0dad
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Remove debug code
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2017-04-25 00:31:39 +00:00 |
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Ian Curtis
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7694e4eb0c
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minor culling node optimisations
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2017-04-25 00:10:55 +00:00 |
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Ian Curtis
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ff936c588b
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don't need cast, conversion is implicit
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2017-04-20 19:46:40 +00:00 |
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Ian Curtis
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912bb0e7cf
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better state handling
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2017-04-20 19:43:41 +00:00 |
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Ian Curtis
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9b226ed478
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parse out some culling node values
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2017-04-17 10:40:07 +00:00 |
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Ian Curtis
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3c78571615
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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.
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2017-04-15 19:00:46 +00:00 |
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Ian Curtis
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21836c088c
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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.
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2017-04-14 23:41:11 +00:00 |
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Ian Curtis
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fc50bdee98
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light parameters must be clamped (HarryTuttle)
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2017-04-14 00:08:17 +00:00 |
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Ian Curtis
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391aafd4c1
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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.
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2017-04-12 15:47:57 +00:00 |
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Ian Curtis
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edfb521a9b
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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.
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2017-04-05 17:57:38 +00:00 |
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Ian Curtis
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f0e00c5dc7
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Rewrite the spot light code, and implement the missing fog logic. (HarryTuttle)
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2017-04-02 21:03:59 +00:00 |
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Bart Trzynadlowski
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f34e25dfc7
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Massive internal change: removed CConfig object and replaced it with a hierarchical config object system (Util::Config::Node). Games are now defined in an XML file. Hopefully I didn't break too many things :/
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2017-03-27 03:19:15 +00:00 |
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Ian Curtis
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ff624afb4d
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The mipmap data in some games seems to being sent behind the base textures, and when the base textures are bound and created the mipmap chain is not yet valid in memory. To fix this, we invalidate the base textures, when the mipmap chain is updated.
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2017-03-25 00:06:24 +00:00 |
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Ian Curtis
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9780f333b4
|
The model3 has this weird issue where the 2d and 3d planes are misaligned by 2 pixels. Originally I made a quick hack that shifted subviewports 2 pixels. But apparently that wasn't enough, as the issue effects everything. Thanks to HarryTuttle for pointing this out, and making a patch :)
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2017-03-19 01:33:45 +00:00 |
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Ian Curtis
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dcd018ab7e
|
Change microtexture scaling values. Seem to much better match expected output. (thanks HarryTuttle)
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2017-03-12 19:00:00 +00:00 |
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Ian Curtis
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503c88df11
|
fix the bad projection matrix in dirt devils and lost world
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2017-03-07 01:29:07 +00:00 |
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Ian Curtis
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f173c3c3ce
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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.
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2017-02-21 23:35:40 +00:00 |
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Ian Curtis
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5b9741bd5d
|
Support high priority polygons. They are treated as a separate overlay plane by the h/w. Fixes some missing fx in harley.
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2017-02-20 17:22:32 +00:00 |
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Ian Curtis
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4a116190b5
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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.
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2017-02-16 17:20:42 +00:00 |
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Ian Curtis
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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 :)
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2017-02-08 16:14:50 +00:00 |
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Ian Curtis
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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.
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2017-02-07 14:05:03 +00:00 |
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Ian Curtis
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144125a62e
|
mark the nodes without valid distances set
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2017-02-05 15:36:05 +00:00 |
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Ian Curtis
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c82dc55485
|
cosmetics
|
2016-12-22 22:11:19 +00:00 |
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Ian Curtis
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72dd0dbf98
|
only need to cull against 4 clipping planes
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2016-12-22 22:09:13 +00:00 |
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Ian Curtis
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20a9514aa2
|
For scroll fog set the viewport to the entire area, allows fog to work in widescreen mode
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2016-12-15 19:27:08 +00:00 |
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Ian Curtis
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ca7046729e
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properly cache un-normalised texture coordinates, fixes a texturing regression in Daytona
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2016-12-15 12:10:52 +00:00 |
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Ian Curtis
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f355e2d062
|
fix microtexture colours
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2016-12-15 00:45:32 +00:00 |
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Ian Curtis
|
89e75a9803
|
Only check scroll fog value from the first viewport from each priority layer. Seems to fix problems with background fogging.
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2016-12-14 19:57:05 +00:00 |
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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.
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2016-12-09 14:13:46 +00:00 |
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Ian Curtis
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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.
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2016-12-06 14:39:46 +00:00 |
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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 |
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|
Ian Curtis
|
a310e8e5cf
|
minor optimisations
|
2016-11-28 17:32:25 +00:00 |
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Ian Curtis
|
abc8c24b69
|
Only check the geometry for culling with valid node distances. We will need this later.
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2016-11-27 19:30:46 +00:00 |
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Ian Curtis
|
fe60d115d2
|
Revert changes .. if we clip against the real3d clipping planes, our wide screen hack won't work anymore.
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2016-11-26 01:19:51 +00:00 |
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Ian Curtis
|
665fa90425
|
Get clipping planes directly from the viewport data. Also no need to clip against a far plane
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2016-11-26 01:12:08 +00:00 |
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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.
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2016-11-21 09:04:56 +00:00 |
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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.
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2016-11-11 17:50:27 +00:00 |
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Ian Curtis
|
2f49012786
|
change scroll fog logic to parse the lower priority viewports first
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2016-10-09 18:10:57 +00:00 |
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Ian Curtis
|
f0a15febd1
|
implement scroll fog, fixes a tonne of missing fx
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2016-10-09 16:34:12 +00:00 |
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Ian Curtis
|
ef11990d19
|
Parse out scrollfog value used for blending over the 2d background.
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2016-10-08 15:41:16 +00:00 |
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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.
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2016-10-08 15:15:25 +00:00 |
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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 |
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Ian Curtis
|
732bff2769
|
disable spot light if the extent is zero
|
2016-06-29 20:53:19 +00:00 |
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Ian Curtis
|
efa7776871
|
parse some unimplemented spot light values from viewport
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2016-06-27 17:35:27 +00:00 |
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Ian Curtis
|
d058a29ac8
|
stencil translucent non textured polys
|
2016-06-19 23:33:06 +00:00 |
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|
Ian Curtis
|
85c4d85562
|
refactor
|
2016-06-19 21:43:09 +00:00 |
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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 |
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Ian Curtis
|
d799c63b1a
|
cache bound texture
|
2016-06-10 11:29:20 +00:00 |
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|
Ian Curtis
|
48a79a8f14
|
cleaning
|
2016-06-10 10:18:47 +00:00 |
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Ian Curtis
|
8440bc7f03
|
support negative exponent
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2016-06-03 09:33:46 +00:00 |
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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 |
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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 |
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|
Bart Trzynadlowski
|
2ee0d9018e
|
New engine: modf -> std::modf (fixes compilation on gcc)
|
2016-05-28 20:54:25 +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 |
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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 |
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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 |
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|
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 |
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|
Ian Curtis
|
c5ce2b9679
|
fix alpha testing for texture format 7
|
2016-05-22 19:17:15 +00:00 |
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|
Ian Curtis
|
fd3eb49369
|
support 4 bit textures
|
2016-05-21 15:50:54 +00:00 |
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|
Ian Curtis
|
e108b56664
|
correctly mask pointers
|
2016-05-19 22:23:50 +00:00 |
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|
Ian Curtis
|
a79fd2786a
|
optimise hash table access for better performance
|
2016-05-19 19:04:44 +00:00 |
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|
Ian Curtis
|
ff8d311dcc
|
support colour table pointer
|
2016-05-18 23:06:41 +00:00 |
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|
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 |
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|
Ian Curtis
|
bc08276d60
|
preliminary specular
|
2016-05-15 16:24:49 +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 |
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|
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
|
43add90d2f
|
Fix bad texture seems
|
2016-05-09 16:26:34 +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 |
|
|
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
|
b0569007ef
|
set correct microtexture wrap mode
|
2016-05-04 10:30:58 +00:00 |
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