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58 lines
2.1 KiB
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58 lines
2.1 KiB
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Physics Properties
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==================
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Exporting physics properties is done by enabling "Rigid Body" in Blenders
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physics tab:
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.. image:: img/enable_physics.png
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.. important::
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By default, a single Blender object with rigid body enabled will export as
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three nodes: a PhysicsBody, a CollisionShape, and a MeshInstance.
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Body Type
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---------
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Blender only has the concept of "Active" and "Passive" rigid bodies. These
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turn into Static and RigidBody nodes. To create a kinematic body, enable the
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"animated" checkbox on an "Active" body:
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.. image:: img/body_type.jpg
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Collision Shapes
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----------------
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Many of the parameters for collision shapes are missing from Blender, and many
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of the collision shapes are also not present. However, almost all of the
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options in Blender's rigid body collision and rigid body dynamics interfaces
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are supported:
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.. image:: img/collision_shapes.jpg
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There are the following caveats:
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- Not all of the collision shapes are supported. Only ``Mesh``, ``Convex
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Hull``, ``Capsule``, ``Sphere`` and ``Box`` are supported in both Blender and
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Godot
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- In Godot, you can have different collision groups and collision masks. In
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Blender you only have collision groups. As a result, the exported object's
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collision mask is equal to its collision group. Most of the time, this is
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what you want.
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.. important::
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To build compound physics shapes, parent together multiple objects with
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rigid body enabled. The physics properties are taken from the parent-most
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rigid body, and the rest are used as collision shapes.
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Collision Geometry Only
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-----------------------
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Frequently you want different geometry for your collision meshes and your
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graphical meshes, but by default the exporter will export a mesh along with the
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collision shape. To only export the collision shape, set the objects maximum
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draw type to Wire:
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.. image:: img/col_only.png
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This will also influence how the object is shown in Blender's viewport.
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Most of the time, you want your collision geometry to be shown see-through when
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working on the models, so this works out fairly nicely.
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