glax/OSMServer
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Renderer now renders 3 different layers over each other: Area (Regions), gScore-Weights (as blobs) and PathResult path.

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Returns the Image instead of saving to disk.
This commit is contained in:
glax 2023-04-20 19:40:50 +02:00
parent 946fa0206b
commit 23429c8a00
1 changed files with 71 additions and 53 deletions
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124
RenderPath/Renderer.cs
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@ -11,6 +11,10 @@ public static class Renderer
{
private const int ImageMaxSize = 20000;
private const float PenThickness = 4;
private static readonly Color RouteColor = Color.Red;
private static readonly Color WeightStartColor = Color.FromArgb(0, 0, 255);
private static readonly Color WeightCenterColor = Color.FromArgb(255, 255, 0);
private static readonly Color WeightEndColor = Color.FromArgb(0, 255, 0);
public class Bounds
{
@ -26,17 +30,16 @@ public static class Renderer
}
[SuppressMessage("Interoperability", "CA1416:Plattformkompatibilität überprüfen")]
public static void DrawGraph(string resultPath, Image? area = null, Bounds? bounds = null)
public static Image DrawPathfinder(Pathfinder pathfinder)
{
FileStream fs = new FileStream(resultPath, FileMode.Open);
PathResult graph = JsonSerializer.Deserialize<PathResult>(fs)!;
List<Coordinates> coords = new List<Coordinates>();
foreach (PathNode node in graph.pathNodes)
coords.Add(node.coordinates);
string workingDir = new DirectoryInfo(resultPath).FullName;
Console.WriteLine("Rendering loaded Regions");
ValueTuple<Image, Bounds> areaRender = DrawArea(pathfinder.regionManager);
Console.WriteLine("Rendering gScores (Weights)");
ValueTuple<Image, Bounds> areaGScoreRender = DrawGScores(pathfinder.gScore!, areaRender.Item1, areaRender.Item2);
Console.WriteLine("Rendering path");
ValueTuple<Image, Bounds> areaGScorePathRender = DrawPath(pathfinder.pathResult!, areaGScoreRender.Item1, areaGScoreRender.Item2);
Image renderedImage = DrawLoadedNodes(graph.gScoreNodes!, graph.gScore!, coords, area, bounds);
renderedImage.Save($"{workingDir}-routing.png");
return areaGScorePathRender.Item1;
}
[SuppressMessage("Interoperability", "CA1416:Plattformkompatibilität überprüfen")]
@ -63,6 +66,7 @@ public static class Renderer
Graphics g = Graphics.FromImage(ret);
g.Clear(Color.White);
//TODO Use road priority for roadcolor
Color start = Color.FromArgb(255, 25, 25, 25);
Color center = Color.FromArgb(255, 0, 0, 0);
Color end = Color.FromArgb(255, 0, 255, 0);
@ -89,13 +93,54 @@ public static class Renderer
}
[SuppressMessage("Interoperability", "CA1416:Plattformkompatibilität überprüfen")]
public static Image DrawLoadedNodes(HashSet<OsmNode> nodes, Dictionary<ulong, double> gScoreDict,
List<Coordinates> pathCoordinates, Image? renderOver = null, Bounds? bounds = null)
public static ValueTuple<Image, Bounds> DrawPath(PathResult pathResult, Image? renderOver = null, Bounds? bounds = null)
{
float minLat = bounds?.minLat ?? nodes.Min(node => node.coordinates.latitude);
float minLon = bounds?.minLon ?? nodes.Min(node => node.coordinates.longitude);
float maxLat = bounds?.maxLat ?? nodes.Max(node => node.coordinates.latitude);
float maxLon = bounds?.maxLon ?? nodes.Max(node => node.coordinates.longitude);
List<Coordinates> coordinates = new();
foreach(PathNode node in pathResult.pathNodes)
coordinates.Add(node.coordinates);
float minLat = bounds?.minLat ?? coordinates.Min(coords => coords.latitude);
float minLon = bounds?.minLon ?? coordinates.Min(coords => coords.longitude);
float maxLat = bounds?.maxLat ?? coordinates.Max(coords => coords.latitude);
float maxLon = bounds?.maxLon ?? coordinates.Max(coords => coords.longitude);
float latDiff = maxLat - minLat;
float lonDiff = maxLon - minLon;
float scaleFactor = latDiff > lonDiff ? ImageMaxSize / latDiff : ImageMaxSize / lonDiff;
int pixelsX = (int)(lonDiff * scaleFactor);
int pixelsY = (int)(latDiff * scaleFactor);
Image ret = renderOver ?? new Bitmap(pixelsX, pixelsY, PixelFormat.Format32bppRgb);
Graphics g = Graphics.FromImage(ret);
if(renderOver is null)
g.Clear(Color.White);
Pen p = new Pen(RouteColor, PenThickness);
for (int i = 0; i < coordinates.Count - 1; i++)
{
Coordinates c1 = coordinates[i];
Coordinates c2 = coordinates[i + 1];
Point p1 = new(Convert.ToInt32((c1.longitude - minLon) * scaleFactor),
Convert.ToInt32((maxLat - c1.latitude) * scaleFactor));
Point p2 = new(Convert.ToInt32((c2.longitude - minLon) * scaleFactor),
Convert.ToInt32((maxLat - c2.latitude) * scaleFactor));
g.DrawLine(p, p1, p2);
}
return new ValueTuple<Image, Bounds>(ret, new Bounds(minLat,minLon,maxLat,maxLon));
}
[SuppressMessage("Interoperability", "CA1416:Plattformkompatibilität überprüfen")]
public static ValueTuple<Image, Bounds> DrawGScores(Dictionary<OsmNode, double> gScoreDict, Image? renderOver = null,
Bounds? bounds = null)
{
float minLat = bounds?.minLat ?? gScoreDict.Min(kv => kv.Key.coordinates.latitude);
float minLon = bounds?.minLon ?? gScoreDict.Min(kv => kv.Key.coordinates.longitude);
float maxLat = bounds?.maxLat ?? gScoreDict.Max(kv => kv.Key.coordinates.latitude);
float maxLon = bounds?.maxLon ?? gScoreDict.Max(kv => kv.Key.coordinates.longitude);
double minWeight = gScoreDict.Min(kv => kv.Value);
double maxWeight = gScoreDict.Max(kv => kv.Value);
@ -107,55 +152,28 @@ public static class Renderer
int pixelsX = (int)(lonDiff * scaleFactor);
int pixelsY = (int)(latDiff * scaleFactor);
Image ret;
Graphics g;
if (renderOver is null)
{
ret = new Bitmap(pixelsX, pixelsY, PixelFormat.Format32bppRgb);
g = Graphics.FromImage(ret);
Image ret = renderOver ?? new Bitmap(pixelsX, pixelsY, PixelFormat.Format32bppRgb);
Graphics g = Graphics.FromImage(ret);
if(renderOver is null)
g.Clear(Color.White);
}
else
{
ret = renderOver;
g = Graphics.FromImage(ret);
}
Color start = Color.FromArgb(0, 0, 255);
Color center = Color.FromArgb(255, 255, 0);
Color end = Color.FromArgb(0, 255, 0);
foreach (KeyValuePair<ulong, double> kv in gScoreDict)
foreach (KeyValuePair<OsmNode, double> kv in gScoreDict)
{
double percentage = (kv.Value - minWeight) / (maxWeight - minWeight);
Brush b = new SolidBrush(GradientPick(percentage, start, center, end));
OsmNode node = nodes.First(node => node.nodeId.Equals(kv.Key));
Brush b = new SolidBrush(GradientPick(percentage, WeightStartColor, WeightCenterColor, WeightEndColor));
float x = (node.coordinates.longitude - minLon) * scaleFactor;
float y = (maxLat - node.coordinates.latitude) * scaleFactor;
float x = (kv.Key.coordinates.longitude - minLon) * scaleFactor;
float y = (maxLat - kv.Key.coordinates.latitude) * scaleFactor;
x -= (PenThickness * 1.5f) / 2;
y -= (PenThickness * 1.5f) / 2;
g.FillEllipse(b, x, y, PenThickness * 1.5f, PenThickness * 1.5f);
}
Pen p = new Pen(Color.Red, PenThickness);
for (int i = 0; i < pathCoordinates.Count - 1; i++)
{
Coordinates c1 = pathCoordinates[i];
Coordinates c2 = pathCoordinates[i + 1];
Point p1 = new(Convert.ToInt32((c1.longitude - minLon) * scaleFactor),
Convert.ToInt32((maxLat - c1.latitude) * scaleFactor));
Point p2 = new(Convert.ToInt32((c2.longitude - minLon) * scaleFactor),
Convert.ToInt32((maxLat - c2.latitude) * scaleFactor));
g.DrawLine(p, p1, p2);
}
return ret;
return new ValueTuple<Image, Bounds>(ret, new Bounds(minLat,minLon,maxLat,maxLon));
}
/*
* https://stackoverflow.com/questions/55601338/get-a-color-value-within-a-gradient-based-on-a-value
*/