Questions tagged [curve]
The curve tag has no usage guidance.
32
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How to remove a control point from a NURBS curve?
I am trying to write an algorithm to remove a control point from a NURBS curve, similarly to what can be achieved using the CVREMOVE command in AutoCAD.
I searched online but I was unable to find a ...
0
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1
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How to get coordinates of mouse after left mouse button is released after drag in OpenGL?
I want to get the coordinates of my mouse after the left mouse button is released after being dragged in OpenGL? I am new to this and wanted to know how I can implement it.
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Continuity of parametric and geometric continuity
We know that in parametric continuity, $C^1$ continuity is two successive curve section $C_1$ and $C_2$ has first parametric derivative is same. That means tangent vector $t_1$ is same for both $C_1$ ...
user17488
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Rendering splines on GPU
We have an application which needs to render spline curves (cubic, bezier, b-spline etc.). We currently have working algorithms in C to stroke the control points of these curves into line strips.
The ...
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Fake cubic Hermite spline interpolation with smoothstep
When scaling an image with Bicubic Interpolation, the Cubic Hermite spline interpolation is used. smoothstep is one of the four basis/blend functions of this kind ...
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Spline interpolation library in cpp
Have been searching a lot for a good spline interpolation library in cpp, came across one, which is the famous Eigen library , having the unsupported counterpart for spline fitting.<Here>.
I ...
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1
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How to take the derivative of a Bézier curve?
I want to know how to take the derivative of a Bézier curve. I visited this website https://pages.mtu.edu/~shene/COURSES/cs3621/NOTES/spline/Bezier/bezier-der.html, but I am unable to figure out how ...
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Determining Rational Quadratic Bezier Curve Weights for Circle
I am trying to create a spherical interpolation with 3 points. I'm currently using Quadratic Bezier Interpolation but have been told I should use Rational Quadratic Bezier Curve in order to get a ...
0
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How do you compute the winding number of a closed poly curve?
Pretty much the title, given a closed curve in 2D, defined by a set of points, and a point. What's the algorithm to calculate the winding number of that curve, point pair?
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How do people come up with subdivision schemes?
Be it chaikin subdivision, loop subdivision, catmull-clark subdivision...
How do people come up with the coefficients for an arbitrary subdivision scheme?
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Projecting one Quadratic Bezier Curve Onto Another
I'm working on improving an open source rasterization library called Gudni that I started a few years ago. It's source repository and the branch I'm currently working on are here:
https://github.com/...
3
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Non least squares formulation to fit catmull rom spline
I have a set of unordered points that I'm getting from an image attached. I'd like to simply fit a parametrized curve such as a catmull-rom curve to with n control points (n = 4 to 10, and can be ...
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Why cubic curves provide the minimum curvature interpolants?
As described by Shirley in his computer graphics book,
Cubic curves provide the minimum-curvature interpolants to a set of points. That is, if you have a set of n + 3 points and define the “...
- 123
2
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1
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If you can use subdivision surfaces for 2D curves
I've seen how subdivision surfaces are good for 3D curves/modeling, but haven't seen anything on if it's good, or even usable, in 2D.
My question is just that, if (a) you can even use subdivision ...
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answer
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Conversion from cubic catmull-rom spline to cubic b-spline
I have a bunch of points that are the control vertices of a cubic catmull-rom spline. I would like to convert these to the control vertices of a cubic bspline.
I believe I can do this using this ...
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