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Backport DirectionalLight fade_start property to 3.x

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- Implement shadow fading when using the Orthogonal shadow mode
  (like in `master`).

This allows customizing the distance at which directional shadows
start to fade away. Shadow fading will also always start at the same
distance now, regardless of the current shadow mode in use.

This is useful for enclosed levels to prevent shadows from fading
at all with a well-tuned maximum distance.

The default fade start value (0.8) results in fading happening later
in the distance compared to the previous behavior, where fading started
from the last shadow split distance (0.6 in PSSM 4 Splits and
0.1 in PSSM 2 Splits).
This commit is contained in:
Hugo Locurcio 2021-10-23 17:23:25 +02:00
parent e96c42f0e1
commit 4fefb136ea
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GPG key ID: 39E8F8BE30B0A49C
14 changed files with 53 additions and 19 deletions
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1
servers/visual_server.cpp
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@ -2381,6 +2381,7 @@ void VisualServer::_bind_methods() {
BIND_ENUM_CONSTANT(LIGHT_PARAM_SHADOW_NORMAL_BIAS);
BIND_ENUM_CONSTANT(LIGHT_PARAM_SHADOW_BIAS);
BIND_ENUM_CONSTANT(LIGHT_PARAM_SHADOW_BIAS_SPLIT_SCALE);
BIND_ENUM_CONSTANT(LIGHT_PARAM_SHADOW_FADE_START);
BIND_ENUM_CONSTANT(LIGHT_PARAM_MAX);
BIND_ENUM_CONSTANT(LIGHT_BAKE_DISABLED);