EZwgl (12.14 Polyhedra, Sphere and Tube)

## 12.14 Polyhedra, Sphere and Tube

The EZwgl includes a few functions for generating regular polyhedra, sphere and tube.

### 12.14.1 Tetrahedron

`void EZ_Tetrahedron(float x, float y, float z, float size);`

This function renders a tetrahedron based on the given size and center. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges.

### 12.14.2 Cube

`void EZ_Cube(float x, float y, float z, float size);`

This function renders a cube based on the given size and center. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges.

### 12.14.3 Octahedron

`void EZ_Octahedron(float x, float y, float z, float size);`

This function renders an octahedron based on the given size and center. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges.

### 12.14.4 Dodecahedron

`void EZ_Dodecahedron(float x, float y, float z, float size);`

This function renders a dodecahedron based on the given size and center. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges.

### 12.14.5 Icosahedron

`void EZ_Icosahedron(float x, float y, float z, float size);`

This function renders an icosahedron based on the given size and center. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges.

### 12.14.6 Sphere

`void EZ_Sphere(int type, int level, float x, float y, float z, float r);`

This function renders a sphere based on the given information. It uses the current polygon mode to decide whether to render all face polygons or just to render the edges. Types are:

    EZ_SPHERE_TRIANGLE
    EZ_SPHERE_QUAD
    EZ_SPHERE_PARAMETRIC

### 12.14.7 Tube

`void EZ_Tube(float *data, int nsegs, int nsides)`

This function renders a tube based on the given data. `data` specifies a static array of floats. It should contain `4 * nsegs` numbers. If we think of `data` as an array of 4 vectors, then the first three floats of each vector specifies a point and the last one specifies a radius. `nsegs` specifies the number of segments in `data`. `nsides` specifies the number of sides for each radial section.

For example, the following code draws a cone.

    static float cone[] = {
    -1.0, 0.0, 0.0, 0.0,
     0.0, 0.0, 0.0, 0.5,
     1.0, 0.0, 0.0, 1.0,
    };
    EZ_Tube(cone, 3, 16);

HTML Documentation Maintainance:`Arturo Espinosa <arturo@nuclecu.unam.mx>`