New & restored TerrainType features

[Starkku]

Animated TerrainTypes

• Length of the animation can now be customized by setting AnimationLength as well, defaulting to half (or quarter if damaged frames are enabled) the number of frames in TerrainType's image.

In rulesmd.ini:

[SOMETERRAINTYPE]  ; TerrainType
AnimationLength=   ; integer, number of frames

Damaged frames and crumbling animation

• By default game shows damage frame only for TerrainTypes alive at only 1 point of health left. Because none of the original game TerrainType assets were made with this in mind, the logic is now locked behind a new key HasDamagedFrames.
  • Instead of showing at 1 point of HP left, TerrainTypes switch to damaged frames once their health reaches [AudioVisual] -> ConditionYellow.Terrain percentage of their maximum health. Defaults to ConditionYellow if not set.
• In addition, TerrainTypes can now show 'crumbling' animation after their health has reached zero and before they are deleted from the map by setting HasCrumblingFrames to true.
  • Crumbling frames start from first frame after both regular & damaged frames and ends at halfway point of the frames in TerrainType's image.
    • Note that the number of regular & damage frames considered for this depends on value of HasDamagedFrames and for IsAnimated TerrainTypes, AnimationLength. Exercise caution and ensure there are correct amount of frames to display.
  • Sound event from CrumblingSound (if set) is played when crumbling animation starts playing.
  • Destroy animation & sound only play after crumbling animation has finished.

In rulesmd.ini:

[AudioVisual]
ConditionYellow.Terrain=  ; floating-point value

[SOMETERRAINTYPE]         ; TerrainType
HasDamagedFrames=false    ; boolean
HasCrumblingFrames=false
CrumblingSound=           ; Sound

Custom palette

• You can now specify custom palette for TerrainTypes in similar manner as TechnoTypes can.
  • Note that this palette behaves like an object palette and does not use tint etc. that have been applied to the tile the TerrainType resides on like a TerrainType using tile palette would.

In artmd.ini:

[SOMETERRAINTYPE]  ; TerrainType
Palette=           ; filename - excluding .pal extension and three-character theater-specific suffix

[github-actions]

Nightly build for this pull request:

• compiled-dll-aa97852a9782bcffdde427318f4917db180c8609.zip
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[chaserli]

haven't looke into the impl yet, only a few codestyle issues

[chaserli]

will look into details later

[Starkku]

Fixed the issues pointed out in reviews so far.