public void loadElevationMap(string path)
{
Bitmap elevationBitmap = (Bitmap)Bitmap.FromFile(path);
// For speed improvement, the bitmap must be locked and accessed unsafely.
// v lock entire bitmap v readonly v use pixel format of bitmap
var bmpdata = elevationBitmap.LockBits(new Rectangle(0, 0, elevationBitmap.Width, elevationBitmap.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, elevationBitmap.PixelFormat);
int stride = bmpdata.Stride;
int colorsize = System.Drawing.Bitmap.GetPixelFormatSize(bmpdata.PixelFormat) / 8; // Divide by 8 because 1 byte is 8 bits and FormatSize returns bits.
elevationMap = new int[elevationBitmap.Width, elevationBitmap.Height];
for (int y = 0; y < elevationBitmap.Height; y++)
{
for (int x = 0; x < elevationBitmap.Width; x++)
{
Color point = fetchColor(x, y, stride, colorsize, bmpdata);
int height;
if (point.R == 0)
{
height = point.B;
}
else
{
height = point.B + 25;
}
elevationMap[x, y] = height;
}
}
// Once we are done, immediately unlock the bitmap
elevationBitmap.UnlockBits(bmpdata);
smoothedElevationMap = Blur.gaussianBlur(elevationMap, 8);
Console.WriteLine("Loaded elevation map sized {0}x{1}", elevationMap.GetUpperBound(0), elevationMap.GetUpperBound(1));
}
public void loadElevationMap(string path)
{
Bitmap elevationBitmap = (Bitmap)Bitmap.FromFile(path);
elevationMap = new int[elevationBitmap.Width, elevationBitmap.Height];
for (int y = 0; y < elevationBitmap.Height; y++)
{
for (int x = 0; x < elevationBitmap.Width; x++)
{
Color point = elevationBitmap.GetPixel(x, y);
int height;
if (point.R == 0)
{
height = point.B;
}
else
{
height = point.B + 25;
}
elevationMap[x, y] = height;
}
}
smoothedElevationMap = Blur.gaussianBlur(elevationMap, 8);
Console.WriteLine("Loaded elevation map sized {0}x{1}", elevationMap.GetUpperBound(0), elevationMap.GetUpperBound(1));
}
