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ddgHeightMap Class Reference

A 16bit heightmap object which can be read from various file formats. More...

#include <ddghemap.h>

Public Members
		ddgHeightMap ( void )
		Create an image but don't allocate memory.
		ddgHeightMap ( unsigned short r, unsigned short c)
		Create an image and allocate memory.
		~ddgHeightMap ()
		Destroy and image.
	short*	buffer (void)
		Return the data block.
	unsigned short	cols (void)
		Return the width of the image.
	unsigned short	rows (void)
		Return the height of the image.
	bool	allocate ( unsigned short r, unsigned short c)
		Allocate a image buffer to be filled by the user.
	void	set (unsigned short r, unsigned short c, short d1)
		Set a data entry in the image.
	short	get (unsigned short r, unsigned short c, short *d1 = 0)
		Get a data entry in the image.
	short	iconvert (float n)
		Inverse transform a value from real float in meters to short space.
	float	convert (short n)
		Transform a value from short space back to real float in meters space.
	float	getf (unsigned short r, unsigned short c, float *d1 = 0)
		Get a transformed value in meters in the image.
	bool	readMemory ( unsigned short *buf )
		Load an heightmap buffer from a memory buffer. More...
	bool	loadTerrain (const char *filename)
		Try all ways to load height map from TGN/BT/DEM/DTED/GTOPO30 file.
	bool	readTGN (const void *buf, unsigned long size)
		Read an image buffer from a Terragen file image. More...
	bool	readRAW (const char *filename, int w, int h)
		Read an image buffer from a RAW floating point file.
	bool	readTGN (const char *filename)
		Read an image buffer from a Terragen file. More...
	bool	writeTGN (const char *filename)
		Write an image buffer to a Terragen file. More...
	bool	readPGM (const char* data, int desired_max)
		Load a PGM file as a height map.
	bool	generateHeights (unsigned int r, unsigned int c, float octaves)
		Generate a height map and fill this image with the contents.
	ddgHeightMap*	quadify ( void )
		Take a heightmap and create a new one which has the same map repeated 2 times.
	void	canyonize (float strength )
		Process the height map to produce rougher features. strength = 0-1.
	void	glaciate (float strength )
		Process the height map to produce smoother features. strength = 0-1.
	void	setMinMax (float b = 0, float d = 1)
		Set scale and base based on the Min Max of the input values, call before loading pixbuffer.
	void	setScaleAndBase (float s, float b = 0)
		Set scale and base.
	float	scale (void)
		Return the scale of the height map.
	float	base (void)
		Return the base height of the map.
	void	scale (float s )
		Scale the height map.
	void	translate (float t )
		Translate the height map.
	int	mini (void)
		Find min value.
	int	maxi (void)
		Find max value.
	void	setmax ( int m)
		Set max value.
	void	setmin ( int m)
		Set min value.
	void	scalef (float s )
		Scale the height map.
	void	translatef (float t )
		Translate the height map.
	float	minf (void)
		Find min value.
	float	maxf (void)
		Find max value.
	void	setmaxf ( float m)
		Set max value.
	void	setminf ( float m)
		Set min value.
	void	closeEdge (float l)
		Pull the edge of the heightmap down to l.
	void	sin (void)
		Initialize with a sin curve.
	bool	saveAsTGA (const char *filename)
		Save height map as TGA image.
	bool	createSpectralMap (int level, float smoothness)
		Create height map from spectral wave generator.
	void	vertexNormal (ddgVector3& normal, long row, long col, float gridSpacing)
		Calculate the surface normal at a location on the map.
Static Public Members
	float	sconvert (short n, float base, float scale)
		Transform a value from short space back to real float space.
	short	siconvert (float n, float base, float scale)
		Inverse transform a value from real float in meters to short space.