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Added min and max values to HeightMap

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Trygve 2024-04-08 17:34:03 +02:00
parent 45fa49a9a8
commit bd9d6e35d0
3 changed files with 21 additions and 13 deletions
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14
src/HeightMap.cpp
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@ -21,12 +21,14 @@ HeightMap::HeightMap(const char* filepath)
// The heigthmap only has one band // The heigthmap only has one band
auto band = file->GetBands()[0]; auto band = file->GetBands()[0];
// write the attrributes // write the attrributes
this->x_size = band->GetXSize(); this->width = band->GetXSize();
this->y_size = band->GetYSize(); this->height = band->GetYSize();
this->min = band->GetMinimum();
this->max = band-> GetMaximum();
this->data = (float *) CPLMalloc(sizeof(float)*x_size*y_size); this->data = (float *) CPLMalloc(sizeof(float)*width*height);
band->RasterIO( GF_Read, 0, 0, x_size, y_size, band->RasterIO( GF_Read, 0, 0, width, height,
this->data, x_size, y_size, GDT_Float32, this->data, width, height, GDT_Float32,
0, 0 ); 0, 0 );
band->FlushCache(); band->FlushCache();
@ -34,6 +36,6 @@ HeightMap::HeightMap(const char* filepath)
float HeightMap::get_pixel(int x, int y) float HeightMap::get_pixel(int x, int y)
{ {
// all the pixels are in an array of floats from left to right, top to bottom // all the pixels are in an array of floats from left to right, top to bottom
int offset = ((this->x_size * y) + x); int offset = ((this->width * y) + x);
return *(this->data + offset); return *(this->data + offset);
} }

6
src/HeightMap.hh
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@ -5,8 +5,10 @@ class HeightMap
{ {
public: public:
float* data; float* data;
int x_size; //!< x dimension in pixels int width; //!< width of image in pixels
int y_size; //!< y dimension in pixels int height; //!< height of image in pixels
float min; //!< Minimum value in image
float max; //!< Maximum value in image
HeightMap(const char* filepath); HeightMap(const char* filepath);
float get_pixel(int x,int y); float get_pixel(int x,int y);

12
src/main.cpp
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@ -1,18 +1,22 @@
#include "HeightMap.hh" #include "HeightMap.hh"
#include <iostream> #include <iostream>
#include <ostream>
int main(int argc, const char* argv[]) int main(int argc, const char* argv[])
{ {
const char* filepath = argv[1]; const char* filepath = argv[1];
HeightMap map(filepath); HeightMap map(filepath);
std::cout << "x: " << map.x_size << " y: " << map.y_size << "\n";
for (int y = 0; y < map.y_size; y++) std::cout << "x: " << map.width << " y: " << map.height << "\n";
std::cout << "max: " << map.max << " min: " << map.min << "\n";
for (int y = 0; y < map.height; y++)
{ {
for (int x = 0; x < map.x_size; x++) for (int x = 0; x < map.width; x++)
{ {
std::cout << map.get_pixel(x, y) << " "; std::cout << map.get_pixel(x, y) << " ";
} }
std::cout << "\n"; std::cout << "\n";
} }
std::cout << "\nend🤡\n";
} }