i try to change my code into opengl code. but it have error.. so sad.. who can help me??? please save me.. sir. what problem went i put my code into lesson34 it not display the terrain. my code is about read tiff image then convert it to raw image. that is my code. #include <stdio.h> #include <stdlib.h> #include <conio.h> #include <iostream.h> #include <fstream.h> #include <math.h> #include <string.h> #define ROW 1000 #define COLUMN 1000 short unsigned int rawData[ROW][COLUMN]; struct HEADER { short int ByteOrder; short int version; long int OffsetOfFirstIFD; short int noOfDE; }; struct DE { short int tag; short int type; long int length; long int value; }; struct IMAGE { long int width; long int length; long int dataBegin; long int dataSize; }; void readTiff (LPSTR& , HEADER& , DE* , IMAGE&); void main() { LPSTR fileTiff; IMAGE img; HEADER head; DE de; fileTiff.open ("1983-2.tif", ios::in | ios::binary); if (!fileTiff) { cout<<" \n\tFile cannot be read... "<<endl; } readTiff(fileTiff, head, &de, img); fileTiff.close(); getch(); } void readTiff(LPSTR& fileTiff, HEADER& head, DE *de , IMAGE& img) { int i; ofstream raw; raw.open("1983-2.raw", ios::out|ios::binary); if(!raw) { cout<<"Failed!!"; } fileTiff.read((char*) &head.ByteOrder,2); fileTiff.read((char*) &head.version,2); fileTiff.read((char*) &head.OffsetOfFirstIFD,4); fileTiff.read((char*) &head.noOfDE,2); short int noOfDE = head.noOfDE; de = new DE[noOfDE]; for(i = 0; i < noOfDE; i++) { fileTiff.read((char*) &de.tag,2); fileTiff.read((char*) &de.type,2); fileTiff.read((char*) &de.length,4); fileTiff.read((char*) &de.value,4); if(de.tag == 256) //ImageWidth { img.width = de.value; cout<<img.width; } if(de.tag == 257) //ImageLength img.length = de.value if(de.tag == 273) //StripOffsets img.dataBegin = de.value; if(de.tag == 279) //StripByteCounts img.dataSize = de.value; i++; } fileTiff.seekg(img.dataBegin,ios::beg); for(i = 0; i<img.length; i++) { for(int j = 0; j<img.width; j++) { fileTiff.read((char*) &rawData[j],1); raw.setf(ios::hex); raw.write((char*) &rawData[j],sizeof rawData[j]); } } raw.close(); }