spline objects

[Stephen L. noe]

Hmnnn. I’m not exactly sure what you mean. Pull a circle from the center? Move an existing one to the center? Can you expand just a little more please?

[David Shore]

Take a spline object (a circle) and make it rotate around its center so it doesn’t wobble. Also, place a circle so that its own center is sitting exactly over screen dead center.

[Stephen L. noe]

Attached is the red file you’re looking for. Open it up and you’ll see.

https://home.comcast.net/~stephenlnoe/spinningcircle.red

right click and save as. This is a PC generated file from Red 3

take care.

[David Shore]

Thank you for the file but the question remains: how did you get the circle’s center to align exactly with screen center? Shift constrains a spline object to a circle, control to a center pull, but you can’t do both at the same time and how do you know when it’s screen center. Is there some pixel accurate method?

[Stephen L. noe]

You need to use the spline primitive. When you select spline primitive, choose the second one down. It’s the circle (which is dead center). Once you’ve selected it, you can do whatever you want with it.

take care.

[David Shore]

Spline primitive creates an oval. How do you make that into a perfect circle as either a primitive or an object?

[Stephen L. noe]

Spline primitive, second spline primitive object is called wedge. Take a look in your Boris manual on page 575. You’ll see that the wedge/circle spline primitive is the circle and the circle spline primitive is really an oval or elipse.

Use the wedge spline primitive for perfect circles.

take care….

[David Shore]

Thanks!!