orbit

How to preload images for Foundation's Orbit image slider?

落花浮王杯 提交于 2019-12-03 14:19:47
Using Zurb's Foundation 4.1.5 (latest version), the Orbit image slider works great. Unfortunately it looks really for the first couple of seconds where all the images appear as a giant bulleted list. Then the JavaScript kicks in and it all is beautiful. How do I avoid the initial ugliness? Can I preload the images? Can I have everything with display: none or visibility: hidden until it's ready? Per Foundation documentation We've cleaned up how Orbit initializes by adding a wrapper feature that stops the ugly flash of unstyled content. Here's the markup needed: To add the preloader, simply

Units of Three.JS, Calculating Rotation & Orbit Speeds

只愿长相守 提交于 2019-12-03 01:32:52
问题 I'm trying to build a to scale model of the solar system. I wanted to see if someone could explain to me how the rotation speed works. Here's the important piece: objects[index].rotation.y += calculateRotationSpeed(value.radius,value.revolution) * delta; How does the rotation speed relate to actual time? So if you have a speed of 1, is that a movement of 1 px per millisecond? Or if you have a speed of 0.1, is that less that a px a second? Basically I'm trying to calculate the correct rotation

Units of Three.JS, Calculating Rotation & Orbit Speeds

这一生的挚爱 提交于 2019-12-02 14:58:07
I'm trying to build a to scale model of the solar system. I wanted to see if someone could explain to me how the rotation speed works. Here's the important piece: objects[index].rotation.y += calculateRotationSpeed(value.radius,value.revolution) * delta; How does the rotation speed relate to actual time? So if you have a speed of 1, is that a movement of 1 px per millisecond? Or if you have a speed of 0.1, is that less that a px a second? Basically I'm trying to calculate the correct rotation speed for the planets given their radius and amount of hours in a day. So if you were on earth, it

Drawing elliptical orbit in Python (using numpy, matplotlib)

橙三吉。 提交于 2019-11-29 16:03:11
I wonder how can I draw elliptical orbit by using the equation ay 2 + bxy + cx + dy + e = x 2 ? I have first determined the a,b,c,d,e constants and now I assume by giving x values I will obtain y and this will give me the graph I want but I couldn't do it by using matplotlib. I would really appreciate, if you could help me! EDIT: I added the code here. from numpy import linalg from numpy import linspace import numpy as np from numpy import meshgrid import random import matplotlib.pyplot as plt from scipy import optimize x = [1.02, 0.95, 0.87, 0.77, 0.67, 0.56, 0.44, 0.30, 0.16, 0.01] y = [0.39