Could somebody post example code for creating a
800 x 600 x 3 float array (800x600xRGB with 32 bits per channel)
using the C++ STL vector class and deleting it when needed?
I’m relatively new to C++ and some of the examples I’ve found on the web have left me scratching my head. Thanks in advance for any help provided.
//! \file Homework.cpp
#include <vector>
int main()
{
// declare the vector
std::vector<float> rgbArray;
// resize it to the dimensions you want
rgbArray.resize( 800 * 600 * 3 );
// ... do something cool
// resize the vector to 0 to clear and delete
rgbArray.resize( 0 );
return 0;
}
Sorry, I like a little organization in my code:
#include <vector>
// Not a very good idea in C++, but ok for this example
#define X_RES 800
#define Y_RES 600
/////////////////////////////////
// Store a RGB structure so you don’t have to
// “think” about where you are in the array.
typedef struct {
float r;
float g;
float b;
} RGB;
int main()
{
std::vector<RGB> rgbArray;
rgbArray.resize(X_RES * Y_RES);
// do something cool… but now, you
// can index the array with meaning!
// rgbArray[0].r = some red value for the first pixel;
// rgbArray[0].g = some green value for the first pixel;
// rgbArray[0].b = some blue value for the first pixel;
rgbArray.resize( 0 );
return 0;
}
-M
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