implemented reading the heightmap from png

terrain.cc

@@ -5,3 +5,30 @@ Terrain::Terrain() {
 
 Terrain::~Terrain() {
 }
+
+
+void Terrain::load() {
+    std::ifstream terrain_png(this->filePath);
+    unsigned int width, height, rowNum, columnNum;
+
+    terrain_png.seekg(16);			//skip part of the header
+    terrain_png.read((char *)&width, 4);	//read width
+    terrain_png.read((char *)&height, 4);	//read height
+    width = ntohl(width);			//convert from host to network byte order
+    height = ntohl(height);			
+
+    heightmap = new unsigned int*[height];	//initialize the heightmap
+    for(rowNum=0; rowNum<height; rowNum++){	//read in the heightmap
+	heightmap[rowNum] = new unsigned int[width];
+	for(columnNum=0; columnNum<width; columnNum++){
+	    terrain_png.read((char *)&heightmap[rowNum][columnNum], 1);
+	}
+    }
+
+
+
+    
+}
+
+void Terrain::render() {
+}

terrain.hh

@@ -3,6 +3,9 @@
 
 #include <string>
 #include "texture.hh"
+#include <fstream>
+//#include <winsock.h>		//on Windows
+#include <netinet/in.h>		//on Unix
 
 class Terrain {
     public:
@@ -14,6 +17,7 @@ class Terrain {
         float friction;
         Texture texture;
         std::string filePath;
+	unsigned int** heightmap;	//can be accessed like 'unsigned int[][]'
 };
 
 #endif