int main(int argc, char *argv[])
{
printf("===================================================\n");
while (openMapFile()); // Tries to open a file
printf("Starting OpenGL...\n");
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(800, 600);
glutCreateWindow("Epic Game");
glewExperimental = GL_TRUE;
glewInit();
initialize();
// Event listeners
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouseClick);
// Starts main timer
glutTimerFunc(10, tick, 0);
glutMainLoop();
return 0;
}
void LocationDialog::displayMap(HWND hDlg, HWND hButton)
// Draw the current map.
{
double latitude, longitude, width, height;
double aspectRatio;
double x1, x2, y1, y2;
minLongitude = -180.;
minLatitude = -90.;
maxLongitude = 180.;
maxLatitude = 90.;
// Get the map file name.
char mapName[32];
lstrcpy(mapName, mapTable[mapIndex].filename);
HANDLE hMap = openMapFile(mapName);
if (hMap == INVALID_HANDLE_VALUE)
return;
// Get the control dimensions.
RECT mapRect;
GetWindowRect(GetDlgItem(hDlg, IDC_MAP_PICTURE), &mapRect);
mapWidth = (short)(mapRect.right - mapRect.left);
mapHeight = (short)(mapRect.bottom - mapRect.top);
// Read the map file header and record values.
DWORD bytesRead;
if (ReadFile(hMap, &latitude, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0) {
CloseHandle(hMap);
return;
}
if (ReadFile(hMap, &longitude, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0) {
CloseHandle(hMap);
return;
}
if (ReadFile(hMap, &width, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0) {
CloseHandle(hMap);
return;
}
aspectRatio = ((double)mapHeight)/((double)mapWidth);
height = width * aspectRatio;
minLongitude = longitude - width / 2.;
minLatitude = latitude - height / 2.;
maxLongitude = longitude + width / 2.;
maxLatitude = latitude + height / 2.;
crossVisible = FALSE;
HDC hDC = GetDC(hDlg);
COLORREF bkColor = GetPixel(hDC, 2, 2);
ReleaseDC(hDlg, hDC);
// Read the rest of the file and draw.
hDC = GetDC(hButton);
if (hDC != NULL) {
RECT rect;
rect.left = rect.top = 0;
rect.right = mapWidth;
rect.bottom = mapHeight;
HBRUSH bkBrush = CreateSolidBrush(bkColor);
HBRUSH oBrush = (HBRUSH)SelectObject(hDC, bkBrush);
GetClientRect(hButton, &mapRect);
Rectangle(hDC, mapRect.left - 1, mapRect.top, mapRect.right + 2
, mapRect.bottom);
while (TRUE) {
if (ReadFile(hMap, &x1, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0)
break;
if (ReadFile(hMap, &y1, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0)
break;
if (ReadFile(hMap, &x2, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0)
break;
if (ReadFile(hMap, &y2, sizeof(double), &bytesRead, NULL) == FALSE
|| bytesRead == 0)
break;
if (x1 * x2 > 0.0) { // only if they have the same sign
short mx, my, lx, ly;
mx = (short)((x1 - minLongitude) * mapWidth / width);
my = (short)(mapHeight - ((y1 - minLatitude) * mapHeight / height));
#ifdef DEBUG
if (mx > mapWidth)
break;//mx = mapWidth;
if (mx < 0)
break;//mx = 0;
if (my > mapHeight)
break;//my = mapHeight;
if (my < 0)
break;//my = 0;
#endif
lx = (short)((x2 - minLongitude) * mapWidth / width);
ly = (short)(mapHeight - ((y2 - minLatitude) * mapHeight / height));
#ifdef DEBUG
if (lx > mapWidth)
break;//lx = mapWidth;
if (lx < 0)
break;//lx = 0;
if (ly > mapHeight)
break;//ly = mapHeight;
if (ly < 0)
break;//ly = 0;
#endif
MoveToEx(hDC, mx, my, NULL);
LineTo(hDC, lx, ly);
}
}
SelectObject(hDC, oBrush);
DeleteObject(bkBrush);
ReleaseDC(hButton, hDC);
}
CloseHandle(hMap);
// calculate for imageToLatLong.
xBias = longitude - (width/2.);
yBias = latitude - ((width/2.)*((double)mapHeight/(double)mapWidth));
scale = (double) mapWidth / width;
mapLongWidth = width;
mapLatHeight = height;
}
