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Added material_overlay property to MeshInstance

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Applying overlay materials into multi-surface meshes currently
requires adding a next pass material to all the surfaces, which
might be cumbersome when the material is to be applied to a range
of different geometries. This also makes it not trivial to use
AnimationPlayer to control the material in case of visual effects.
The material_override property is not an option as it works
replacing the active material for the surfaces, not adding a new pass.

This commit adds the material_overlay property to GeometryInstance
(and therefore MeshInstance), having the same reach as
material_override (that is, all surfaces) but adding a new material
pass on top of the active materials, instead of replacing them.

Implemented in rasterizer of both GLES2 and GLES3.
This commit is contained in:
Fernando Cosentino
2021-07-24 21:45:51 +01:00
parent 3ac698750b
commit cc8846bef6
17 changed files with 124 additions and 0 deletions
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8
doc/classes/VisualServer.xml
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@@ -1374,6 +1374,14 @@
Sets the flag for a given [enum InstanceFlags]. See [enum InstanceFlags] for more details.
</description>
</method>
<method name="instance_geometry_set_material_overlay">
<return type="void" />
<argument index="0" name="instance" type="RID" />
<argument index="1" name="material" type="RID" />
<description>
Sets a material that will be rendered for all surfaces on top of active materials for the mesh associated with this instance. Equivalent to [member GeometryInstance.material_overlay].
</description>
</method>
<method name="instance_geometry_set_material_override">
<return type="void" />
<argument index="0" name="instance" type="RID" />