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Document the generation source used for SDF in CanvasItem shaders

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Hugo Locurcio
2023-02-22 21:16:24 +01:00
parent 6115f9bef9
commit 81f44d9fae
2 changed files with 11 additions and 3 deletions
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2
tutorials/2d/2d_lights_and_shadows.rst
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@@ -170,6 +170,8 @@ of the Light2D base class:
depending on the other nodes' enabled visual layers **Occluder Light Mask**.
This can be used to prevent certain objects from receiving light.
.. _doc_2d_lights_and_shadows_setting_up_shadows:
Setting up shadows
------------------

12
tutorials/shaders/shader_reference/canvas_item_shader.rst
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@@ -200,7 +200,7 @@ Light built-ins
Light processor functions work differently in Godot 4.x than they did in Godot
3.x. In Godot 4.x all lighting is done during the regular draw pass. In other
words, Godot no longer draws the object again for each light.
words, Godot no longer draws the object again for each light.
Use render_mode ``unshaded`` if you do not want the light processor function to
run. Use render_mode ``light_only`` if you only want to see the impact of
@@ -264,8 +264,14 @@ Below is an example of a light shader that takes a CanvasItem's normal map into
SDF functions
^^^^^^^^^^^^^
There are a few additional functions implemented to support an SDF (Signed Distance Field) feature.
They are available for Fragment and Light functions of CanvasItem shader.
There are a few additional functions implemented to sample an automatically
generated Signed Distance Field texture. These functions available for Fragment
and Light functions of CanvasItem shaders.
The signed distance field is generated from :ref:`class_LightOccluder2D` nodes
present in the scene with the **SDF Collision** property enabled (which is the
default). See the :ref:`2D lights and shadows <doc_2d_lights_and_shadows_setting_up_shadows>`
documentation for more information.
+-----------------------------------------------+----------------------------------------+
| Function | Description |