9 commits

Author	SHA1	Message	Date
toxieainc	6c24bf7c8f	Optimize quad rendering by replacing the double computations for the area computation with the equivalent shoelace algorithm along with kahans algorithm to compute the cross products. In addition pull out the /w to the end, which increases precision even more. ... Thus making the result similar to the fp64 version, tested e.g. with harleys first person mode (all artifacts still gone as before). Improves perf on low end boards (e.g. Intel) dramatically (10fps with harley before, now 70 on my laptop), and even on higher end (e.g. NVIDIA laptop, quads are now faster than tri pipeline on my laptop).	2022-08-16 21:34:31 -07:00
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	605dad2c02	Fix the sky in harley in first person mode where pixels in the sky are culled when they shouldn't be with the quad renderer. Basically we were running out of precision in a rare corner case. Doing the maths with double precision and casting back to float was enough to fix the issue.	2019-12-27 21:36:46 +00:00
Ian Curtis	a5858e635d	To calculate the mipmap value the opengl needs to calculate the difference in the texture coordinates between adjacent pixels. If there are no adjacent pixels the hw may need to spawn invisible fragments outside of the visible polygon. Our algorithm was culling these out so the mipamp calculation failed for edge pixels. Anyway this fixes quad rendering looking broken with the latest nvidia drivers.	2019-12-10 11:40:39 +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	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