(WIP) Supermodel WIP - 模擬器

2012.01.16

　　 其實看對照圖應該就會懂了wwww

Happy New Year, fellow emulationistas! Here's to a great new year
filled with emulation goodies!

Mac users will be pleased to hear that the SDL 1.2.15 pre-release
fixes full screen mode (-fullscreen). R. Belmont has posted
instructions at the Forum. Linux users running Ubuntu 11.10 who
are still experiencing problems building v0.2a should re-download
the source code from the Download page. A tiny fix to the Linux
Makefile has been made. I didn't think it warranted a new release.

Over the holidays, Nik and I had a chance to do a little bit of work
on Supermodel. I looked into the 3D graphics problems that plague
many of the Step 2.x games (namely Harley Davidson, The Ocean Hunter,
and Emergency Call Ambulance) but was unable to make any headway. I
did manage to fix the missing geometry when playing mirrored tracks
in Daytona 2 and Scud Race Plus. For those who were unaware of this
neat Easter egg, holding down the Start button during the course
select screen allows races to be run on horizontally-mirrored tracks.
As it turns out, AM2's programmers cleverly reversed the X axis
without needing to modify much else. Only a single transformation
matrix is changed to flip the graphics. Because of the differences
between how OpenGL and Model 3 perform back-face culling, flipping
a single axis reverses the orientation of most polygons, causing them
to be discarded by OpenGL. Now, Supermodel performs some extra
calculations to determine which side of a polygon is the front side
and the mirrored graphics seem to work fine.

http://www.supermodel3.com/Images/WIP/12252011_Dayto2PE_Bad.png
http://www.supermodel3.com/Images/WIP/12252011_Dayto2PE_Mirror.png

http://www.supermodel3.com/Images/WIP/12252011_ScudP_Bad.png
http://www.supermodel3.com/Images/WIP/12252011_ScudP_Mirror.png

This also fixes the wheels in Dirt Devils but is not related to any
of the other problems that occur in Step 2.x games, which are caused
by their unusual scene graph layout.

Nik optimized how model look-up tables are cleared in the 3D engine,
which is one reason for the infamous slow-downs in Daytona 2. He also
added the optional ability to run all rendering in a separate thread,
further enhancing performance on multi-core systems and eliminating
the slow-downs on fast systems. I have not yet tested the performance
in Spikeout, which suffers from a related problem, but I would expect
it to have an effect there as well. Nik committed these changes to SVN
today. For those running their own up-to-date builds, multi-threaded
graphics are enabled by default and can currently only be disabled by
setting GPUMultiThreaded to 0 in Supermodel.ini (recommended on slower
systems or for those with fewer cores).
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來源：http://www.supermodel3.com/WhatsNew.html


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