Added material_overlay property to MeshInstance3D

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 GeometryInstance3D
(and therefore MeshInstance3D), 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.
This commit is contained in:
Fernando Cosentino 2021-09-25 19:40:26 +01:00 committed by Rémi Verschelde
parent 2c7fcdd7f9
commit ca79373d13
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GPG key ID: C3336907360768E1
18 changed files with 147 additions and 20 deletions

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@ -51,6 +51,7 @@ public:
virtual GeometryInstance *geometry_instance_create(RID p_base) = 0;
virtual void geometry_instance_set_skeleton(GeometryInstance *p_geometry_instance, RID p_skeleton) = 0;
virtual void geometry_instance_set_material_override(GeometryInstance *p_geometry_instance, RID p_override) = 0;
virtual void geometry_instance_set_material_overlay(GeometryInstance *p_geometry_instance, RID p_override) = 0;
virtual void geometry_instance_set_surface_materials(GeometryInstance *p_geometry_instance, const Vector<RID> &p_material) = 0;
virtual void geometry_instance_set_mesh_instance(GeometryInstance *p_geometry_instance, RID p_mesh_instance) = 0;
virtual void geometry_instance_set_transform(GeometryInstance *p_geometry_instance, const Transform3D &p_transform, const AABB &p_aabb, const AABB &p_transformed_aabbb) = 0;