bezier

问题 I am asked to design a recursive function called Bezier which parametres are a list of points given, and the point that must be evaluated t. It returns the point in the Bezier curve defined by the control points of the list of points. This is the algorithm that I have done: def Bezier(point_list, t): if len(point_list)==1: return point_list[0] else: P1=Bezier(point_list[0:-1],t) P2=Bezier(point_list[1:],t) P=(1-t)*P1 + t*P2 return P and this is the list of points given: point_list=[ (0,0),

问题 You will understand what I mean if you use graphic editing programs like Gimp or Photoshop. To edit a curve on those programs (which probably is Bezier Curve), we can click on the curve, drag the mouse and the curve is changed accordingly. I suspect all the things behind this mechanism are concerned with vectors, but I couldn't find any document mentioning how to do it. Could anybody tell me how I can do that? Thank you very much. [edit] What I meant was to select-the-curve itself to change

问题 You will understand what I mean if you use graphic editing programs like Gimp or Photoshop. To edit a curve on those programs (which probably is Bezier Curve), we can click on the curve, drag the mouse and the curve is changed accordingly. I suspect all the things behind this mechanism are concerned with vectors, but I couldn't find any document mentioning how to do it. Could anybody tell me how I can do that? Thank you very much. [edit] What I meant was to select-the-curve itself to change

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . Improve this question I need to find a way of drawing the inside of a closed 2D curve. This curve is actually created using a bicubic Bezier curve, but that's not important I believe. At the moment there should be no "holes" within the drawn shape. So it will just be totally filled in. It seems

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . Improve this question I need to find a way of drawing the inside of a closed 2D curve. This curve is actually created using a bicubic Bezier curve, but that's not important I believe. At the moment there should be no "holes" within the drawn shape. So it will just be totally filled in. It seems

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . Improve this question I need to find a way of drawing the inside of a closed 2D curve. This curve is actually created using a bicubic Bezier curve, but that's not important I believe. At the moment there should be no "holes" within the drawn shape. So it will just be totally filled in. It seems

问题 Is there an easy method of curve-fitting a single segment of a bezier curve to 4 points in 3D? Here's an example of what I'm trying to do: And here's another picture of the resulting Bezier handles for the segment: In this case, I've attempted to line up the bezier by hand so that it intersects with the 4 given points and results in the shortest curve possible. Ideally, I'd like to do this programmatically somehow- I've found a few algorithms online that do this, but most of them seem to be

问题 I have a list of points and want to connect them as smoothly as possible. I have a function that I evaluate to get these points. I could simply use more sampling points but that would only increase the SVG file size. I think using a piecewise cubic Bezier curve would be better suited. How do I do this? I did some research and came across the svgpathtools package, which looked promising. However, I did not find any functionality like this. 回答1: If you ever used Illustrator you certainly

问题 Having searched the web, I see various people in various forums alluding to approximating a cubic curve with a quadratic one. But I can't find the formula. What I want is this: input: startX, startY, control1X, control1Y, control2X, control2Y, endX, endY output: startX, startY, controlX, controlY, endX, endY Actually, since the starting and ending points will be the same, all I really need is... input: startX, startY, control1X, control1Y, control2X, control2Y, endX, endY output: controlX,

来源： https://stackoverflow.com/questions/34399897/svg-polygon-rounding