|
public static Lerp ( |
||
| a | ||
| b | ||
| u | float | |
| return | ||
// Background downloading and processing
private unsafe void UpdateThread()
{
HttpWebResponse webresponse = null;
bool failed = false;
string failmsg = "";
Image downloadimg = null;
DateTime starttime = new DateTime();
// Make the GET request
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(ADDRESS);
webrequest.Referer = REFERRER;
webrequest.Method = "GET";
webrequest.KeepAlive = false;
webrequest.Timeout = 5000;
webrequest.UserAgent = "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.14) Gecko/2009082707 Firefox/3.0.14 GTB5 (.NET CLR 3.5.30729)";
webrequest.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);
try
{
// Download!
webresponse = (HttpWebResponse)webrequest.GetResponse();
}
catch (Exception e)
{
failed = true;
failmsg = "Failed to update buienradar. Web request " + e.GetType().Name + ": " + e.Message;
webresponse = null;
}
if (!failed)
{
try
{
// Make image
downloadimg = Image.FromStream(webresponse.GetResponseStream());
webresponse.Close();
}
catch (Exception e)
{
failed = true;
failmsg = "Failed to update buienradar. Image read " + e.GetType().Name + ": " + e.Message;
downloadimg = null;
}
}
if (!failed)
{
// Dispose old images
if (images != null)
{
for (int i = 0; i < images.Length; i++)
{
if (images[i] != null)
{
images[i].Dispose();
}
}
}
images = null;
arrowlocations = null;
//#if !DEBUG
try
{
//#endif
// Time at which the animation starts
DateTime now = DateTime.Now.AddMinutes(ADJUST_TIME_MINUTES);
int nearest5min = (int)(Math.Round((double)now.Minute / (double)5) * (double)5);
starttime = new DateTime(now.Year, now.Month, now.Day, now.Hour, 0, 0);
starttime = starttime.AddMinutes(nearest5min);
// Prepare variables to track the rain
DateTime incomingtime = new DateTime();
bool isincoming = false;
DateTime cleartime = new DateTime();
int clearframecount = 0;
// Disassemble the image into separate images
FrameDimension fd = new FrameDimension(downloadimg.FrameDimensionsList[0]);
int numimages = downloadimg.GetFrameCount(fd);
images = new Image[numimages];
downloadimg.SelectActiveFrame(fd, 0);
Bitmap firstbmp = new Bitmap(downloadimg);
Size sz = firstbmp.Size;
BitmapData firstbmpdata = firstbmp.LockBits(new Rectangle(0, 0, sz.Width, sz.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
for (int i = 0; i < numimages; i++)
{
downloadimg.SelectActiveFrame(fd, i);
Bitmap imgbmp = new Bitmap(downloadimg);
Bitmap newbmp = new Bitmap(sz.Width, sz.Height, PixelFormat.Format32bppArgb);
// Start processing the image
BitmapData imgbmpdata = imgbmp.LockBits(new Rectangle(0, 0, sz.Width, sz.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
BitmapData newbmpdata = newbmp.LockBits(new Rectangle(0, 0, sz.Width, sz.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
PixelColor *fpixels = (PixelColor *)(firstbmpdata.Scan0.ToPointer());
PixelColor *ipixels = (PixelColor *)(imgbmpdata.Scan0.ToPointer());
PixelColor *npixels = (PixelColor *)(newbmpdata.Scan0.ToPointer());
// Go for all pixels
bool wholeframeclear = true;
for (int y = 0; y < sz.Height; y++)
{
for (int x = 0; x < sz.Width; x++)
{
// We compare the pixel of the first image (no clouds) with
// the current image to determine if there are clouds here
bool isclear = (ipixels->b == fpixels->b) &&
(ipixels->g == fpixels->g) &&
(ipixels->r == fpixels->r);
// Detect rain at current location
if (!isclear && (x >= LOCATION_X - LOCATION_RADIUS) && (x <= LOCATION_X + LOCATION_RADIUS) &&
(y >= LOCATION_Y - LOCATION_RADIUS) && (y <= LOCATION_Y + LOCATION_RADIUS) && (i > 0))
{
wholeframeclear = false;
if (!isincoming)
{
// Rain!
incomingtime = starttime.AddMinutes(i * 10);
isincoming = true;
clearframecount = 0;
}
if (clearframecount < CLEAR_FRAMES)
{
clearframecount = 0;
}
}
// Clear pixel?
if (isclear)
{
// This pixel is normal.
PixelColor ds = PixelColor.Desaturate(*ipixels);
* npixels = PixelColor.Lerp(ds, *ipixels, 0.1f);
* npixels = PixelColor.Scale(*npixels, 1.1f);
PixelColor add = new PixelColor(0, 10, 10, 10);
* npixels = PixelColor.Add(*npixels, add);
}
else
{
// This pixel is a cloud.
PixelColor mod = new PixelColor(255, 160, 160, 250);
* npixels = PixelColor.Modulate(*ipixels, mod);
* npixels = PixelColor.Scale(*npixels, 1.8f);
}
// Next pixel
fpixels++;
ipixels++;
npixels++;
}
}
// Whole frame clear of rain at current location?
if (wholeframeclear)
{
// Count this frame as a clear frame
clearframecount++;
if (clearframecount == CLEAR_FRAMES)
{
// The clear time is 3 frames ago
cleartime = starttime.AddMinutes((i - 3) * 10);
}
}
// Clean up
imgbmp.UnlockBits(imgbmpdata);
newbmp.UnlockBits(newbmpdata);
images[i] = newbmp;
imgbmp.Dispose();
imgbmp = null;
}
// Show incoming time
if (isincoming)
{
incomingtext = incomingtime.Hour + ":" + incomingtime.Minute.ToString("00");
flashincoming = true;
}
else
{
incomingtext = "N / A";
flashincoming = false;
}
// Show clear time
if (clearframecount >= CLEAR_FRAMES)
{
cleartext = cleartime.Hour + ":" + cleartime.Minute.ToString("00");
flashclear = true;
}
else
{
cleartext = "N / A";
flashclear = false;
}
// Clean up
firstbmp.UnlockBits(firstbmpdata);
firstbmp.Dispose();
firstbmp = null;
downloadimg.Dispose();
downloadimg = null;
//#if !DEBUG
}
catch (Exception e)
{
failed = true;
failmsg = "Failed to update buienradar. Image processing " + e.GetType().Name + ": " + e.Message;
downloadimg = null;
}
//#endif
if (images != null)
{
// Set up some random arrow locations, for decorative reason
Random rnd = new Random();
arrowlocations = new Size[images.Length];
Size offset = new Size(radar.Left + 100 + rnd.Next(radar.Width - movearrow1.Width - 100), radar.Top + 100 + rnd.Next(radar.Height - movearrow1.Height - 100));
for (int i = 0; i < images.Length; i++)
{
arrowlocations[i] = offset + new Size(rnd.Next(100) - 50, rnd.Next(100) - 50);
}
}
// Done
firstimagetime = starttime;
nextupdatedelay = NORMAL_UPDATE_DELAY;
}
// Handle failure
if (failed)
{
HandleFail(failmsg);
}
else
{
updatefailed = false;
}
// We're done updating (either successful or failed)
UpdateComplete();
}
