23 commits

Author	SHA1	Message	Date
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	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	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	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	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	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	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	69eac95846	Replace glsl 3 function. Apparently this doesn't work on OS X.	2017-03-28 20:24:44 +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	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	c545b9fd85	preliminary microtexture	2016-05-04 00:35:07 +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
Bart Trzynadlowski	34301e97e1	Adding new 3D engine by Ian Curtis. Old engine moved to Graphics/Legacy3D/.	2016-03-21 04:10:14 +00:00