ellipse

Is there any HTML code that would display an ellipse or a rounded rectangle?

由 痴心易碎 提交于 2019-12-10 14:23:29
问题 I am not sure if it's possible at all in HTML, but I would still ask it here: Is there any HTML code that would stand for an ellipse or a rounded rectangle? 回答1: On another thought, it's quite possible! There you go: http://virkkunen.net/b/oh-dear.html Pure HTML! It doesn't even use any new-fangled CSS or JavaScript or whateverscript. 回答2: Yes, Canvas. But it's really the Canvas HTML tag, coupled with Javascript. Read more about CANVAS here http://en.wikipedia.org/wiki/Canvas_element 回答3: If

How to find a point where a line intersects an ellipse in 2D (C#)

由 耗尽温柔 提交于 2019-12-10 11:03:32
问题 I need to find a point where a line (its origin is ellipse' center) intersects an ellipse in 2D... I can easily find a point on a circle, because I know an angle F and the circle' radius (R): x = x0 + R * cosF y = y0 + R * sinF However I just can't figure how am I supposed to deal with an ellipse... I know it's dimensions (A & B), but what is the way of finding parameter T?! x = x0 + A * cosT y = y0 + B * sinT From what I understand the parameter T (T angle) is not far from the F angle

Plotting Ellipse3d in R Plotly with surface ellipse

由 扶醉桌前 提交于 2019-12-10 10:11:15
问题 Similar to the question here but this didn't give me excatly what I needed and I couldn't figure it out: Plot ellipse3d in R plotly?. I want to recreate rgl's ellipse3d and surface ellipsoid in plotly. I know there there was an anwer which allowed plotting of an ellipse but as individual opaque markers, I need to get it as a surface ellipsoid that's slightly opaque so I can still see the data points in the ellipsoid. I tried to figure out how dww's comment for "add_surface" instead works but

How do I draw an ellipse with arbitrary orientation pixel by pixel?

由 喜你入骨 提交于 2019-12-09 09:48:04
问题 I have to draw an ellipse of arbitrary size and orientation pixel by pixel. It seems pretty easy to draw an ellipse whose major and minor axes align with the x and y axes, but rotating the ellipse by an arbitrary angle seems trickier. Initially I though it might work to draw the unrotated ellipse and apply a rotation matrix to each point, but it seems as though that could cause errors do to rounding, and I need rather high precision. Is my suspicion about this method correct? How could I

Ellipse and line intersection JAVA

由 主宰稳场 提交于 2019-12-09 01:38:45
问题 I have a ellipse with a mid-point 'mid' an a horizontal radius 'h' and a vertical radius 'v' and a Line2D. Now I need some code to calculate the two intersection points of the two. I already tried some code and tried it on my own but there always is a mistake. Does somebody have some working code? 回答1: You will need to use algebra to solve the two equations, and it will get a little bit messy. First you have to write out the ellipse (1) (x/h)^2 + (y/v)^2 = 1 and the line in the format (2) y =

How can I determine if a GPS Coordinate is on or in an Ellipse?

由 青春壹個敷衍的年華 提交于 2019-12-08 13:28:54
问题 Ok, so I am still new to asking questions on Stack Overflow, so please be nice :) I have an issue that I have been trying to solve for a month now with failed results time and time again. I have found various questions somewhat similar to this, but nothing that has struck me as the definitive answer. The closest that I have found so far is this: Convert GPS coordinates to coordinate plane. In short, what I need is to know is if a GPS Coordinate is either on or inside an ellipse. KNOWNS: Width

Draw ring with given thickness, position, and radius. (Java2D)

由 帅比萌擦擦* 提交于 2019-12-08 03:07:25
I need to draw a ring, with given thickness, that looks something like this: The center must be transparent, so that it doesn't cover previously drawn shapes. (or other rings) I've tried something like this: //g is a Graphics2D object g.setColor(Color.RED); g.drawOval(x,y,width,height); g.setColor(Color.WHITE); g.drawOval(x+thickness,y+thickness,width-2*thickness,height-2*thickness); which draws a satisfactory ring, but it covers other shapes; the interior is white, not transparent. How can I modify/rewrite my code so that it doesn't do that? You can create an Area from an Ellipse2D that

How to calculate the volume of the intersection of ellipses in r

由 ↘锁芯ラ 提交于 2019-12-07 12:43:41
问题 I was wondering how to calculate the intersection between two ellipses e.g. the volume of the intersection between versicolor and virginca as illustrated in this graph: which is plotted using the following mwe based on this tutorial: data(iris) log.ir <- log(iris[, 1:4]) ir.species <- iris[, 5] ir.pca <- prcomp(log.ir, center = TRUE, scale. = TRUE) library(ggbiplot) g <- ggbiplot(ir.pca, obs.scale = 1, var.scale = 1, groups = ir.species, ellipse = TRUE, circle = TRUE) g <- g + scale_color

Determining if a point lies within an ellipse, including the edge

由 前提是你 提交于 2019-12-06 11:41:27
I am trying to test if a point lies within a circle and if the point is on the perimeter, it should be included in the results. However, Java's contains() implementation uses less than instead of less than or equal to. For example consider this snippet: Ellipse2D.Double circle = new Ellipse2D.Double(0, 0, 100, 100); System.out.println(circle.contains(50, 0)); System.out.println(circle.contains(50, 100)); System.out.println(circle.contains(0, 50)); System.out.println(circle.contains(100, 50)); System.out.println(circle.contains(50, 50)); This prints the following: false false false false true

Plotting Ellipse3d in R Plotly with surface ellipse

由 為{幸葍}努か 提交于 2019-12-06 04:05:25
Similar to the question here but this didn't give me excatly what I needed and I couldn't figure it out: Plot ellipse3d in R plotly? . I want to recreate rgl's ellipse3d and surface ellipsoid in plotly. I know there there was an anwer which allowed plotting of an ellipse but as individual opaque markers, I need to get it as a surface ellipsoid that's slightly opaque so I can still see the data points in the ellipsoid. I tried to figure out how dww's comment for "add_surface" instead works but couldn't figure it out.... Can anyone help please? if (!require("rgl")) install.packages("rgl") dt <-
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