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moetman

2D array pointer as function argument

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in main: double heightField[MAP_SIZE][MAP_SIZE]; Terrain *terrain = new Terrain(); terrain->generateTerrain( &heightField ); in Terrain: //function sig void Terrain::generateTerrain1( double *pHeightMap[][MAP_SIZE] ) Display.cpp: In member function `int Display::update_display()': Display.cpp:1112: error: no matching function for call to `Terrain::generateTerrain1(double (*)[512][512])' Terrain.cpp:58: note: candidates are: void Terrain::generateTerrain1(double* (*)[512]) make: *** [Display] Error 1 Why doesn't it like it ?

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I think you want void generateTerrain( double pHeightMap[][MAP_SIZE] ) and terrain->generateTerrain( heightField );

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Alternatively you could use std::vector
std::vector< std::vector< double > > heightField;

// or like this (I personally find it more readable, but that might just be me)
std::vector<std::vector<double> > heightField;


There's also an interesting thread about 2D arrays in C++ here There's also some discussion about boost::multi_array in that thread as well

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Thanks Guys,

I'll try when I get home,
So you can have a pointer to a 2d array ? someFunc(double *ptr) that will take a N-dim array ?
Aren't 2d arrays really 1d anyway

Thanks again

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