Classic relative scaling apparently had some numerical artifacts related
to length of firstwall. Cribbing the logic added in 6fc6b7d5 in Polymost
along with bumping the precision of the intermediate terms seems to make
it line up fully. Rooftop floor in E1L1 and surrounding ledges are good
test cases for this.

Dino Bollinger authored Aug 14, 2021 and Richard Gobeille committed Aug 16, 2021

Fixes terminx/eduke32#185

Dino Bollinger authored Aug 12, 2021 and Richard Gobeille committed Aug 12, 2021

Fixes terminx/eduke32#182

Dino Bollinger authored Aug 05, 2021 and Richard Gobeille committed Aug 12, 2021

A viewscreen placed in the map with a yvel of 1 will always display
its camera feed if the player is within active range. If set to 0,
the screen will only show the tile on manual activation.

If yvel is 1, and the screen is connected to a camera, it will display
the view of that camera. Otherwise, it will show the view of the
Viewscreen's owner, the direction in which it is looking being
dictated by angle and shade of that sprite.

The xvel of the viewscreen now defines the active range.
If less or equal to 0, the default distance of 8192 is used.

Note that this is currently restricted to one active screen at a time.

Fixes terminx/eduke32#41

Includes performance improvements identified by icculus.

Dino Bollinger authored Aug 05, 2021 and Evan Ramos committed Aug 05, 2021

With the leading period, the resulting path after Bcorrectfilename() is
applied does not have a leading slash, causing the string comparison with
the defined level filename to fail even if a usermap is part of an episode.

The previous attempt broke the window at the start of E1L3 of Duke3D.
Whatever this was intended for doesn't work with animated maskwalls.

Dino Bollinger authored Aug 02, 2021 and Richard Gobeille committed Aug 04, 2021

Usage:
mapinfo
{
    mapmd4 <md4sum>
    mapart "mapart/testart_XX.ART"
}
The specified path must end with the suffix "_XX.ART" (case-insensitive).
The actual files need to be numbered from "_00.ART" to "_19.ART". Just
like with maphacks, an md4 sum is required.

This allows sharing the same per-map art between multiple levels.

Dino Bollinger authored Jul 27, 2021 and Richard Gobeille committed Jul 30, 2021

Fixes terminx/eduke32#155

Dino Bollinger authored Jul 27, 2021 and Richard Gobeille committed Jul 28, 2021

Fixes terminx/eduke32#177

Fixes terminx/eduke32#173

Fixes terminx/eduke32#76 and terminx/eduke32#91 (for real this time)

Fixes terminx/eduke32#148
Fixes nukeykt/NBlood#489

They are unnecessary and unused.

Fixes terminx/eduke32#102

Dino Bollinger authored Jul 08, 2021 and Richard Gobeille committed Jul 09, 2021

Fixes terminx/eduke32#108

Fixes terminx/eduke32#139