catmull-rom-curve | 易学教程

Drawing a CatmullRomSpline in libgdx with an endpoint and startpoint

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问题 So my goal is to draw a spline similar to this one (where the line goes through each point): But the spline loops around (from the end point 2 back to the start point): I tried changing the "continuous" boolean in the catmullromspline, but that resulted in only a dot being drawn in the center of the screen. I also ended the line drawing when it hit the last point, but the result was ugly because the line was still curving at the start and end points. I looked everywhere in the source code,

Drawing a CatmullRomSpline in libgdx with an endpoint and startpoint

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

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问题 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; float f1 = -0.5 * t3 + t2 - 0.5 * t; float f2 = 1.5 * t3 - 2.5 * t2 + 1.0; float f3 = -1.5 * t3 + 2.0 * t2 + 0.5 * t; float f4 = 0.5 * t3 - 0.5 * t2; float x = p0.x * f1 + p1.x * f2 + p2.x * f3 + p3.x * f4; float y = p0.y * f1 + p1.y * f2 + p2.y * f3 + p3.y * f4

Adding alpha to Catmull-Rom

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问题 I am trying to generate a Catmull-Rom curve from a list of points in Unity. As I do not want to store points in between points of the curve I opted to use a solution that could calculate a position in a Catmull-Rom curve based on time. There are a few examples of this, here and here, however, neither shows how to implement alpha. The reason I want to implement alpha is so I can have the ability to change between a centripetal, chordal, and uniform Catmull-Rom curve. private Vector3

Acceleration in Unity

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问题 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 have is that each section of the spline is a different length and the cube moves across each section at a different, but uniform, speed. This causes there to be sudden jumps in the change of the speed of the cube when transitioning between sections. In

smooth svg path connection

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问题 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 projcet: M125,275R 125,325 175,325 225,325 275,325 225,275 175,275 125,275Z I've also created a jsfiddle: http://jsfiddle.net/ry8kT/ Can this be achieved with catmull curves? If not, can you please give me an example how to get a completely smoothed

Drawing a CatmullRomSpline in libgdx with an endpoint and startpoint

阅读更多关于 Drawing a CatmullRomSpline in libgdx with an endpoint and startpoint

So my goal is to draw a spline similar to this one (where the line goes through each point): But the spline loops around (from the end point 2 back to the start point): I tried changing the "continuous" boolean in the catmullromspline, but that resulted in only a dot being drawn in the center of the screen. I also ended the line drawing when it hit the last point, but the result was ugly because the line was still curving at the start and end points. I looked everywhere in the source code, and could not find a function that could prevent it from looping. And as far as i know, bezier splines

smooth svg path connection

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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 projcet: M125,275R 125,325 175,325 225,325 275,325 225,275 175,275 125,275Z I've also created a jsfiddle: http://jsfiddle.net/ry8kT/ Can this be achieved with catmull curves? If not, can you please give me an example how to get a completely smoothed shape? Much thanks in advance, McFarlane In your first example, the path started at 125,275 and was at 125

catmull-rom splines for Android

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问题 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 thread: How do I draw a curve through tree points in Android? Unfortunately, I wasnt able to follow the implementation there so I'm hoping somebody out there has already done this and can share a few lines of sample code. Thanks! 回答1: This game

Calculate a 2D spline curve in R

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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 used to do this ( grid.xspline function?), but I haven't been able to install an archived version of the package, and don't find any examples exactly along the lines of what I would like. The bezier package also looks promising, but it is very slow and I also can't get it quite right: library(bezier) set.seed(1) n <- 10 x <- runif(n) y <- runif(n)