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GeometryFlat Class Reference

Concrete class providing a flat geometry (in the XY-plane, with Z up). More...

#include <geometry.h>

Inheritance diagram for GeometryFlat:
Geometry ScanConverter

Public Member Functions

 GeometryFlat (uint seed)
 
float height (const XYZ &p) const
 Height is just the z co-ordinate of a point.
 
void set_height (XYZ &p, float v) const
 Setting a height is simply assigning to the z-coordinate.
 
const XYZ midpoint (const XYZ &v0, const XYZ &v1) const
 The mid-point between two points is simply their average.
 
float normalised_latitude (const XYZ &) const
 This doesn't really mean anything here, so return zero, which would correspond to the equator of a spherical geometry.
 
const XYZ up (const XYZ &) const
 Returns unit z vector. (Up is the same everywhere in this geometry).
 
const XYZ north (const XYZ &) const
 Returns unit y vector. (North is the same everywhere in this geometry).
 
const XYZ east (const XYZ &) const
 Returns unit x vector. (East is the same everywhere in this geometry).
 
const XYZ perturb (const XYZ &p, const XYZ &variation) const
 Add a random variation to a point.
 
float epsilon () const
 Returns zero. Heights are stored exactly once assigned so no need for non-zero epsilon.
 
virtual void scan_convert (const boost::array< XYZ, 3 > &v, const ScanConvertBackend &) const
 
- Public Member Functions inherited from Geometry
 Geometry (uint seed)
 Constructor.
 
virtual ~Geometry ()
 Destructor.
 
virtual uint scan_convert_image_aspect_ratio () const
 Multiplier for width of a scan-converted image.
 

Additional Inherited Members

- Static Protected Member Functions inherited from Geometry
static void scan_convert_common (const boost::array< XYZ, 3 > &v, const ScanConvertBackend &backend)
 Common scan-converter code. More...
 
- Protected Attributes inherited from Geometry
Random01 _r01
 Random number generator used for perturbations and the like. More...
 

Detailed Description

Concrete class providing a flat geometry (in the XY-plane, with Z up).

Member Function Documentation

void GeometryFlat::scan_convert ( const boost::array< XYZ, 3 > &  v,
const ScanConvertBackend backend 
) const
virtual

Scan lines are through the centre of pixels at y=0.5. This function doesn't care about quantization in x; that's for the backend.

Implements ScanConverter.


The documentation for this class was generated from the following files: