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# Example of Math Graphics 数学函数图 制图法

## Space curve

A simple straightforward way to run interactive mathematics in a web page is by mathHand.com. All 3D graphes can be zoom, move or spin. One variable for space curve, and two variables for space surface.

### by parametric3D(x)

1. ellipsoid
2. conjugate-roots

#### 3 equations with 1 variable t or x

3. Cabello's Curve 曲线
4. parametric3D(cos(t),sin(t),t)
5. parametric3D(sin(x),cos(x),x)
6. parametric3D(x,x,x)

#### 2 equations with 1 variable t or x

the 2D curve becomes 3D by clicking the 3D checkbox
7. parametric3D(x,x)
8. complex sn(x) Curve

### by wireframe3D(x)

9. wireframe3D(x)
10. wireframe3D(sin(x),cos(x),x)

### by spin3D(x)

spin different directions by clicking the spin checkbox.
11. spin3D(x**2)

#### Animation

The parametric3D( ) plots animation by clicking the spin checkbox.
12. A space cubic curve. Most simple, but only its movement shows what it is about.
13. A Lissajous figure with rotating phase.
14. The above Lissajous figure is a projection of this space curve.
15. Another space curve, a little bit more complicated: hyperbolic spiral.

### Reference 参阅

• example 例题
• graph 制图
• graphics 制图法
• animation 动画 ﻿