void AddLight(Point physicalPosition, AquaPoint scaledPosition)
{
_lights.Add(scaledPosition);
var geometry = pLights.Data as PathGeometry;
var figure = new PathFigure();
figure.StartPoint = physicalPosition;
figure.Segments.Add(new LineSegment(physicalPosition, isStroked: true));
geometry.Figures.Add(figure);
}
private void imgDisplay_MouseDown(object sender, MouseButtonEventArgs e)
{
if (tbConfigureLights.IsChecked ?? false)
{
AquaLib.aqua_get_frame_size(_context, out int width, out int height);
var physicalPosition = e.GetPosition(imgDisplay);
var scaledPosition = new AquaPoint(
physicalPosition.X * width / imgDisplay.ActualWidth,
physicalPosition.Y * height / imgDisplay.ActualHeight);
AddLight(physicalPosition, scaledPosition);
}
}
private void tbConfigureLights_Click(object sender, RoutedEventArgs e)
{
if (tbConfigureLights.IsChecked ?? false)
{
if (_context == IntPtr.Zero)
{
tbConfigureLights.IsChecked = false;
return;
}
if (_lightMap != IntPtr.Zero)
{
AquaLib.aqua_free_light_map(_lightMap);
}
_lights.Clear();
_lightMap = IntPtr.Zero;
_lightMapBuffer = null;
pLights.Data = new PathGeometry();
imgLightMap.Source = null;
if (Keyboard.Modifiers.HasFlag(ModifierKeys.Control))
{
const int NumLights = 300;
AquaLib.aqua_get_frame_size(_context, out int width, out int height);
double totalArea = width * height * 2;
double areaPerLight = totalArea / NumLights;
double squareSide = Math.Sqrt(areaPerLight);
double x = squareSide * 0.25;
double y = squareSide * 0.5;
double minX = squareSide * 0.25;
double maxX = width - squareSide * 0.25;
int dx = 1;
double xScale = imgDisplay.ActualWidth / width;
double yScale = imgDisplay.ActualHeight / height;
for (int i = 0; i < NumLights; i++)
{
var scaledPosition = new AquaPoint(x, y);
var physicalPosition = new Point(x * xScale, y * yScale);
AddLight(physicalPosition, scaledPosition);
x += dx * (squareSide * 0.5);
if ((dx > 0) && (x > maxX))
{
x = 2 * maxX - x;
y += squareSide;
dx = -1;
}
else if ((dx < 0) && (x < minX))
{
x = 2 * minX - x;
y += squareSide;
dx = +1;
}
}
tbConfigureLights.IsChecked = false;
}
}
if (!(tbConfigureLights.IsChecked ?? false))
{
if (_lights.Count > 0)
{
try
{
_lightMap = AquaLib.aqua_generate_light_map(_context, _lights.Count, _lights.ToArray());
AquaLib.aqua_light_map_get_light_for_pixel(_lightMap, out int width, out int height, null);
_lightMapBuffer = new int[width * height];
AquaLib.aqua_light_map_get_light_for_pixel(_lightMap, out width, out height, _lightMapBuffer);
AquaLib.aqua_light_map_get_light_pixel_count(_lightMap, out int numLights, null);
int[] randomColor = new int[numLights];
int opaque = unchecked ((int)0xFF000000);
for (int i = 0; i < numLights; i++)
{
randomColor[i] = opaque | _rnd.Next(0, 16777216);
}
int[] imageBuffer = new int[width * height];
for (int i = 0; i < imageBuffer.Length; i++)
{
if (_lightMapBuffer[i] >= 0)
{
imageBuffer[i] = randomColor[_lightMapBuffer[i]];
}
}
imgLightMap.Source = BitmapSource.Create(
width,
height,
96.0,
96.0,
PixelFormats.Pbgra32,
null,
imageBuffer,
width * 4);
}
catch
{
if (_lightMap != IntPtr.Zero)
{
AquaLib.aqua_free_light_map(_lightMap);
}
_lightMap = IntPtr.Zero;
throw;
}
}
}
}
