Surface types
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Contents
Elementary surfaces
Notes:
- Elementary surfaces refer here to surfaces that can be represented by a single equation.
Planes
Notes:
- Parametric form of the general plane is assumed if four values are provided in the surface card. With six values the plane is assumed to be defined by three points.
Surface name | Parameters | Surface equation | Description |
---|---|---|---|
py | x0 | Plane perpendicular to x-axis at x = x0 | |
pz | y0 | Plane perpendicular to y-axis at y = y0 | |
px | z0 | Plane perpendicular to z-axis at z = z0 | |
plane | A, B, C, D | General plane in parametric form | |
plane | x1, y1, y1, x2, y2, y2, x3, y3, y3 | General plane defined by three points |
Second-order quadratic surfaces
Notes:
- cyl is a shorthand notation for cylz
Surface name | Parameters | Surface equation | Description |
---|---|---|---|
cylx | y0, z0, r | Infinite cylinder parallel to x-axis, centred at (y0,z0), radius r | |
cyly | x0, z0, r | Infinite cylinder parallel to y-axis, centred at (x0,z0), radius r | |
cylz, cyl | x0, y0, r | Infinite cylinder parallel to z-axis, centred at (x0,y0), radius r | |
cylv | x0, y0, z0, u0, v0, w0, r | Infinite cylinder, parallel to (u0,v0,w0), centred at (x0,y0,z0), radius r | |
sph | x0, y0, z0, r | Sphere, centred at (x0,y0,z0), radius r |
Non-quadratic surfaces
Surface name | Parameters | Surface equation | Description |
---|---|---|---|
inf | All space |
Derived surface types
Truncated cylinders
Notes:
- Truncated cylinders use the same names as the infinite cylinders above, with two additional values determining the height.
Surface name | Parameters | Composed of | Description |
---|---|---|---|
cylx | y0, z0, r | Infinite cylinder + two planes | Infinite cylinder parallel to x-axis, centred at (y0,z0), radius r |
cyly | x0, z0, r | Infinite cylinder + two planes | Infinite cylinder parallel to y-axis, centred at (x0,z0), radius r |
cylz, cyl | x0, y0, r | Infinite cylinder + two planes | Infinite cylinder parallel to z-axis, centred at (x0,y0), radius r |
Prisms
Surface name | Parameters | Composed of | Description |
---|---|---|---|
sqc | x0, y0, d | four planes | Infinite square prism parallel to z-axis, centred at (x0,y0), half-width d |