VPython Reference

Created by Shuyang Chen

VPython reference page for animation functions and constants. This page assumes and only includes basic usage of VPython.

VPython Template

from __future__ import division
from visual import *

## Constants

## Initialization

## Loop
t = 0
deltat = 1e-10
end = 10

while t < end:
    rate(1000)
    ## Loop Code
    
    t += deltat

VPython Animation Functions

Sphere

Source

Example

ball = sphere(pos=(1,2,3), radius=0.4, color=color.blue)

Parameters

Parameter	Type	Description
pos	vector	Position of the object
color	color	Color of the object
radius	radius	Radius of the sphere
opacity	number	Opacity of the object
make_trail	boolean	Whether or not to leave behind a trail

Arrow

Source

Example

arr = arrow(pos=(1,2,3), axis=(4,5,6), color=color.red)

Parameters

Parameter	Type	Description
pos	vector	Position of the object
axis	vector	Direction the arrow is pointing at
color	color	Color of the object
opacity	number	Opacity of the object
shaftwidth	number	Width of the shaft (default: 0.1*(length of arrow))
headwidth	number	Width of the head (default: 2*shaftwidth)
headlength	number	Length of the head (default: 3*shaftwidth)
make_trail	boolean	Whether or not to leave behind a trail

Color

Source

Example

c = color.red

Basic Colors

Name	Vector	Color
Red	(1,0,0)	color.red
Yellow	(1,1,0)	color.yellow
Green	(0,1,0)	color.green
Orange	(1,0.5,0)	color.orange
Blue	(0,0,1)	color.blue
Cyan	(0,1,1)	color.cyan
Magenta	(1,0,1)	color.magenta
White	(1,1,1)	color.white
Black	(0,0,0)	color.black

Examples

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