Re: Getting cartesian values from Bezier curve question
Re: Getting cartesian values from Bezier curve question
- Subject: Re: Getting cartesian values from Bezier curve question
- From: Raphael Sebbe <email@hidden>
- Date: Wed, 16 Jun 2004 09:35:23 +0200
I second Marcel on this. Use NSBezierPath for drawing only (even simple
lines) and something more suited to your needs internally.
I'd recommend something like Kochanek splines that provide local
control for tension, continuity and bias and are widely used in
animation softwares.
Raphael
On 15 Jun 2004, at 17:35, Marcel Weiher wrote:
Are you sure you want an NSBezierPath to control a set of values? It
seems more like you want to have a lookup of values with smooth
interpolation, which could potentially be rendered using a
NSBezierPath. However, since you actually need to smoothly
interpolate values without the bezier path, it probably won't be
necessary.
Cheers,
Marcel
On 15 Jun 2004, at 15:11, Vince Ackerman wrote:
Did you get an answer to this? I too need to find this method.
Vince
On Jun 14, 2004, at 16:05, dan donaldson wrote:
Hello Wise Ones
I am considering adding a control to allow users to use a Bezier
Path to edit a set of values that change over time. The essentials
are a timeline with values determined by keyframes which will be
represented by Bezier nodes.
My question is, is there a simple way to derive the y value of a
bezier line segment given an x coordinate. Assume that there is no
circumstance where more than one y value might exist for a given x
value. I don't see anything in the NSBezierPath documentation that
indicates that this is supported.
For the purposes I will be putting this to, a close approximation -
eg 2% error - would suffice.
Anyone?
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