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Questions tagged [catmull-rom-curve]

38 questions
45
votes
5 answers

Catmull-rom curve with no cusps and no self-intersections

I have the following code to calculate points between four control points to generate a catmull-rom curve: CGPoint interpolatedPosition(CGPoint p0, CGPoint p1, CGPoint p2, CGPoint p3, float t) { float t3 = t * t * t; float t2 = t * t; …
Øyvind
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3 answers

Catmull-Rom interpolation on SVG Paths

I am experimenting with creating high-performance, good-looking pencil tools using SVG paths. I am logging the mouse coordinates to draw a path. To get a high-fidelity path (accurate to the user's movements) I need to log a point for every pixel…
nicholaswmin
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13
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3 answers

Calculate a 2D spline curve in R

I'm trying to calculate a Bezier-like spline curve that passes through a sequence of x-y coordinates. An example would be like the following output from the cscvn function in Matlab (example link): I believe the (no longer maintained) grid package…
Marc in the box
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11
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4 answers

Acceleration in Unity

I am trying to emulate acceleration and deceleration in Unity. I have written to code to generate a track in Unity and place an object at a specific location on the track based on time. The result looks a little like this. The issue I currently…
Dan
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5
votes
2 answers

smooth svg path connection

I have a random set of points and want to create a smooth svg shape with raphaeljs. To connect the points I am using a catmull-rom-spline. The problem is that the point where the path is closed is not smooth. This is an example path out of my…
McFarlane
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5
votes
1 answer

How do Catmull-Rom and Hermite splines relate?

I'm a little confused as to how they relate. From my class, my professor asked how to fit C1 continuous piecewise Hermite curves to x amount of points with automatically computed tangents. Can someone explain how this works?
minionhacking
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4
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1 answer

How do I find the control points for a Bezier curve?

I need to implement connections in the form of curved lines in C# (Unity). I would like to get the result as similar as possible to the implementation in Miro.com (see screenshot). After attaching the curve, I calculate the path of the cubic Bezier…
g0dzZz1lla
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4
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1 answer

Compute a point on a spline surface

I am working on a control algorithm to be run on an embedded system. My programming language is C and the system will be pretty tightly constrained in terms of memory and processing power. I have a few (in the order of about 10) reference points in…
calamity
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4
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1 answer

How to update Unity GameObject to move along Spline Curve?

Good afternoon, I am attempting to implement a GameObject in Unity that moves along a Cubic CatMull-Rom Spline given 8 constrained random values. I have implemented a function, ComputePointOnCatmullRomCurve, that returns a point on a cubic…
Marcus Koz
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4
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1 answer

CatmullRomSplines and other smooth paths

I've been looking into getting an object on a two dimensional plane to follow a smooth curve defined by several control points.From what I've found, I'm looking for a Catmull-Rom-Spline. I've been using LibGDX for my project, and it has its own…
Ooo
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3
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1 answer

Spline Catmull-Rom for image zooming using C++ and opencv

I'm trying to implement spline Catmull-Rom for image zooming using C++ and OpenCV. I performed two tests, the first is image zooming (X2), and the second image reconstruction (zooming image decimated). My problem is that in the image interpolated…
Salim Elheni
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3
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2 answers

cubic interpolation with not equidistant points

I'm trying to create an interpolation of a list of points. I've some point of coordinates (ti, xi), where ti are timestamp and xi are associated values. I want to create a function that passes through these points and allows me to find the x value…
jepessen
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1 answer

How performing fast Catmull-Rom texture tiltering by linear interpolations?

I've read some articles which introduce fast third-order interpolation using GL_LINEAR. [1] http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter20.html [2]…
slyx
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2
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1 answer

Problems when using same coordinate twice in a Catmull-Rom Spline

I'm currently messing around with Catmull-Rom splines, and have found a problem that I'm not sure how to solve. So when I use a method to do the Catmull stuff, I have to give an ArrayList of 4 points. But in some instances, I do not always have…
PartyPlanet
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2
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catmull-rom splines for Android

I'm trying to find a way to implement catmull-rom splines on the android platform for the purpose of smoothly drawing a line through n points. Ideally I would be able to adapt cubic beziers via the Path and its cubicTo method as alluded to in this…
Nick
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