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Questions tagged [cylindrical]

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From Matrix to polar plot

I have an np.array A in which a polar coordinate distribution Z=f(theta,r) is described by its elements Z=f(theta,r)=A[i,j]. I want to plot it in polar coordinates, like plt.imshow() does for Cartesian coordinates, if possible without converting it…
jackEjack
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Bad cylindrical marker recognition on 13 and 14 iPhones

Making a project with Vuforia's cylindrical markers. Markers are relatively small ~60mm * 15mm It turns out a strange situation. On the latest iPhone models (13 and 14), the marker is very poorly recognized. On models X and 11, on iPads, recognition…
espesp1001
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Ray tracing triangle intersection in cylindrical coordinates

I am using a finite difference Navier Stokes code that supports both cartesian and cylindrical coordinates. There is a task where we have a geometry given by a STL file (in cartesian coordinates) and we need to find intersections of rays that we…
Nikolaos Beratlis
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Vuforia cylindrical image target ratio question

I'm going crazy with cylindrical image target. I read the Vuforia doc about how to calculate ratio but I need to have a sample made with numbers... Then, for example, I have a bottle coke, I enter Top = 6.5 Bottom 6.5 and Height 11. My image is 529…
Kafar
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html canvas draw cylindrical view of the image by drawing vertical slices

I am using below code to draw a cylindrical view of the image by drawing vertical slices of the image: DrawMug(canvasId, cupImg, rotate, scale) { var canvas: any = document.getElementById(canvasId); var ctx = canvas.getContext("2d"); …
Ashok Damani
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plot cylindrical coordinate using an x y file in gnuplot

I would like to make a 3D plot with gnuplot using the interface.txt file (File). Knowing that I have a y-axis rotation invariance. This figure represents a 2D section (plot 'interface.txt' u 2:1) Here's what I'd like to have with gnuplot but I…
Suntory
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Maple: How to convert Cylindrical coordinates to Cartesian coordinates?

We get some expression in Cylindrical coordinates (r, ϕ, z ) like : expr := r*z^2*sin((1/3)*ϕ) we need to convert it into Cartesian coordinates and than back to Cylindrical coordinates. How to do such thing? So I found something like…
Rella
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Incorrect vertices in 3d cylinder

Right now, I'm trying to draw a 3d cylinder shape in webgl, where the top is thinner than the bottom. The cylinder is also uncapped. The cylinder is drawn using triangles for the sides, with a dodecagon (12 sides) as the circle. However, one of my…
Edmund Liang
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Code for converting Cartesian (x,y,z) to Cylindrical (ρ,θ,z) coordinates 2D/3D

Is there any code in C++ to converts from Cartesian (x,y,z) to Cylindrical (ρ,θ,z) coordinates in 2-dimensions and 3-dimensions!! Thanks
MAY
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How generate random points within cylinder

how to generate uniformly distributed points within cylinders giving these parameters, Center point denoted as C, C1 is bottom and C2 is Top and R is Radius. C1=[5.697592e-01, 3.159923e-01, 1.037074e+00];C2=[4.211637e-01, 5.624242e-01,…
Mustapha Musa
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Solution to diffusion equation in cylindrical coordinates using FiPy not correct

The steady-state solution to a diffusion equation in cylindrical geometry using FiPy is rather different from the solution obtained from another software, eg., Mathematica. The equation is: $0 =…
AJHC
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Anamorphosis in Python

I tried to do anamorphosis on an image by following this link https://github.com/aydal/Cylinderical-Anamorphosis/blob/master/anamorph.py It gives an anamorphic image but it gives that image in the half circle. But I want the output in a full circle…
Nihar
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Contour plot on the surface of a 3D cylinder

Because of your great help I can now plot a 3D cylinder with a hole inside :) This is my code: import numpy as np import matplotlib as mlp import matplotlib.pyplot as plt import mpl_toolkits.mplot3d.axes3d as axes3d inner_radius = 100 outer_radius…
roflcopter122
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How to find points inside, where sphere intersects with cylinder in MATLAB?

I am trying to identify points of sphere that are inside union of both sphere and cylinder, I have generated random points in side a cylinder as below pts = 3000; r= 3*((rand(pts,1)).^(1/3)); theta = 2*pi*rand(pts,1); x= r.*cos(theta); y=…
manoos
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Unity: Faux Gravity - inner Capsule/ Cylinder

I'm struggling with false Gravity in a Cylinder or Capsule. Basically I thought I could take the same Code as for spherical gravity, which does not work. So I changed some lines to get a better result. [SerializeField] float gravity =…
user7183273
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