Bluefish444 Create3D Manual de usuario descargar pdf (Pagina 44)

11. Path Object

This is a new type of Object introduced in version 2.7

This object can work either as a rendered object that actually appears on screen or as an –

almost – arbitrary path other objects that are its 'children' in hierarchy follow during animation. If it

is a rendered object, it can be used e.g. to draw diagrams that are animated over time.

The Path Object itself is a spline curve that is defined by placing a number of Control Points (CP)

to anywhere in 3D space. Nemo uses modified Cardinal type splines because these are very

easy to control and all CPs lie on the spline itself. There is also a Tension parameter for each

control point that controls how tightly the curve bends at each point. A Tension paramater of 0

results in a linear line segment between two control points, the maximum value of 1 makes the

curve very round. The smoothest curve can be usually achieved if you set Tension to 0.5 for

every CP (this special case of a Cardinal spline is also known as the Catmull-Rom spline).

When you create a Path Object, the minimum number of CPs is always 4. You can always

increase this value if you need a more irregularly shaped path. New points will be created

automatically and you can place them either by choosing the currently selected CP and using the

X,Y,Z numeric controls or visually. For the latter you need to click on the Edit button first. If this

button is highlighted, the currently selected CP turns red instead of yellow. You can click on any

of them on screen. If you click with the middle mouse button then you can move this point in the

x,y direction by moving the mouse, and by rotating the mouse wheel you can move the point in

the z direction. If you are satisfied with the placement, you can click with the middle button again,

then choose another point you wish to move until all points are where you want them to be.

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Bluefish444 Create3D Manual de usuario Pagina 44