CartoType::CElevationGrid Class Reference

#include <cartotype_elevation_grid.h>

List of all members.

Classes
class	TCell
Public Types
enum	{ ENoInterpolation, EScanLineInterpolation, E8DirectionInverseDistanceWeightedInterpolation }
Public Member Functions
CT_IMPORT TResult	DrawLine (const MPath &aPath, int16 aElevation)
void	DrawStraightLine (const TPoint &aPoint1, const TPoint &aPoint2, int16 aElevation)
void	DrawPoint (const TPoint &aPoint, int16 aElevation)
CT_IMPORT CBitmap *	CreateBitmap (TResult &aError)
int32	Width () const
int32	Height () const
int16	MinElevation () const
int16	MaxElevation () const
Static Public Member Functions
static CT_IMPORT CElevationGrid *	New (TResult &aError, int32 aWidth, int32 aHeight)

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Detailed Description

This class represents a grid with elevation information. Elevation contours can be drawn into it and the grid stores the elevation for each point. If multiple contours go through one point the average is computed. + Copies code from 24 bit graphics context. to be discussed: maybe this code must be moved up to CGraphicsContext and elevation grid must be derived from that class. + 2: Maybe this class must move to graphics.

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Member Enumeration Documentation

anonymous enum

Enumeration of interpolation methods.

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Member Function Documentation

CT_EXPORT CBitmap * CElevationGrid::CreateBitmap

(

TResult &

aError

)

Create bitmap from elevation grid. This bitmap has one byte per pixel with the height relative to the minimum and maximum height. Points are interpolated if necessary. Interpolation is done with two algorithms: First, points are interpolated by traversing lines in the grid and approximating points between known points. All points that are still unknown after this traversal will be interpolated individually with the method InterpolateElevation.

void CartoType::CElevationGrid::DrawPoint	(	const TPoint &	aPoint,
		int16	aElevation
	)		[inline]

Draw a point by calculating the resulting elevation in the grid. If the point is outside of the grid this function does nothing.

CT_EXPORT CElevationGrid * CElevationGrid::New	(	TResult &	aError,
		int32	aWidth,
		int32	aHeight
	)		[static]

Create a new elevation grid.

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

• cartotype_elevation_grid.h
• cartotype_elevation_grid.cpp