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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.
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# 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) |