...
- Create a ground object and set its "Dynamics" option to "Passive rigid body".
- Add a rocket object ("Rocket01") and set its "Dynamics" option to "Soft body".
- Add a null ("Null01") and a "Gravity" daemon.
- Create a camera and move it until you see the object in the camera's focus.
- Switch to camera view with the 5 key.
- SceneCamera01 > Node Params > Node > Parent to > Null01
- SceneCamera01 > Node Params > Camera > Link target > Null01
...
The script takes the soft body's vertex positions and uses them to calculate the rocket's centre of gravity. This position vector is then transferred to the null object.
| Code Block | ||
|---|---|---|
| ||
# Get the soft body (also works with any other object: active rigid body or animated) # Get the helper null, the (number of) vertices and define a null vector softBody = scene.getObject("Rocket01") null = scene.getObject("Null01") vertexList = softBody.getVertices() numVert = float(len(vertexList)) pos = Vector.new(0.0,0.0,0.0) # Go through the soft body's vertices and add up all positions for vertex in vertexList: pos += vertex.getPosition() # Calculate the object's midpoint by averaging positions centreOfGravity = Vector.new(pos.getX() / numVert, pos.getY() / numVert, pos.getZ() / numVert) # Apply the centre of gravity to the null object null.setParameter("Position", centreOfGravity) |