[插件资源] Truss Physics 1.0.3 - 软体碰撞物理模拟

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发表于 2015-12-23 13:23:58 |只看该作者 |倒序浏览

Truss Physics for unity3d
Version: 1.0.3 Beta (Dec 03, 2015)

Truss Physics is a Unity3D extension package. Its purpose is the soft-body simulation. The soft bodies in Truss Physics are represented by mass-springs systems with optional internal pressure which allows to simulate a wide range of materials from jelly-like and springy to almost rigid but deformable. The simulation is done on CPU with extensive usage of SIMD and muli-threading optimizations.

1. To connect two bodies you use Tx Constraint component

The component should be added to a soft body. The component has a property 'Base Body' which can be either soft, rigid or static body. Thus it connects the attached soft body (body A) to the base body (body B). Body B is optional, if it's missing body A will be attached to the world.

The constraint component also has a list of 'Snaps' which actually do the job. Without snaps the constraint does nothing. To add a snap you press 'Add' button next to the snaps list and then set the new snap properties.

The snap properties are a little bit different whether your base body is soft or not. For non-soft base body a snap expects a set of nodes of attached soft body which will be fixed relatively to the base body transform. For soft base body each snap connects *one* node of attached soft body to a node or to an edge of base soft body ('edge' here means a line going through any two nodes of a soft body).

The nodes sets you use in snap properties like 'Nodes', 'Node' or 'Nodes B' should be defined in Truss assets you use for your soft bodies. See Truss Designer - Nodes tab - Named Set.

2. To setup your soft body deformation you use Truss Designer - Links tab - Elastic Deformation.
'Build From Mesh...' tool only create links from the mesh edges. That's only surface links. To make the truss stable you have to manually add internal links.

3. The nodes cannot break. Yes, the truss is unbreakable.

To make a breakable object you assemble it from several bodies and connect them with constraints. Each snap of a constraint has 'Strength' property which can be adjusted to make the snap break after certain load. A snap also has 'Master' flag which means that if this snap is broken whole constraint is broken.

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