/// <summary>
/// Translates a node.
/// </summary>
/// <param name="scene">The scene to add primitives to.</param>
/// <param name="projection">The projection used to convert the objects.</param>
/// <param name="node"></param>
private void TranslateNode(Scene2D scene, IProjection projection, CompleteNode node)
{
// build the rules.
IEnumerable <MapCSSRuleProperties> rules =
this.BuildRules(new MapCSSObject(node));
// interpret the results.
foreach (var rule in rules)
{
int zIndex;
if (!rule.TryGetProperty <int>("zIndex", out zIndex))
{
zIndex = 0;
}
float minZoom = (float)projection.ToZoomFactor(rule.MinZoom);
float maxZoom = (float)projection.ToZoomFactor(rule.MaxZoom);
uint?pointId = null;
int color;
if (rule.TryGetProperty <int>("color", out color))
{
float width;
if (rule.TryGetProperty <float>("width", out width))
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
scene.AddStylePoint(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, color, width);
}
else
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
scene.AddStylePoint(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, color, 1);
}
}
byte[] iconImage;
if (rule.TryGetProperty("iconImage", out iconImage))
{
if (!pointId.HasValue)
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
}
// an icon is to be drawn!
ushort imageId = scene.AddImage(iconImage);
scene.AddIcon(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, imageId);
}
string text;
if (rule.TryGetProperty("text", out text))
{
int textColor;
if (!rule.TryGetProperty("textColor", out textColor))
{
textColor = SimpleColor.FromKnownColor(KnownColor.Black).Value;
}
int haloColor;
int?haloColorNullable = null;
if (rule.TryGetProperty("textHaloColor", out haloColor))
{
haloColorNullable = haloColor;
}
int haloRadius;
int?haloRadiusNullable = null;
if (rule.TryGetProperty("textHaloRadius", out haloRadius))
{
haloRadiusNullable = haloRadius;
}
int fontSize;
if (!rule.TryGetProperty("fontSize", out fontSize))
{
fontSize = 10;
}
string fontFamily;
if (!rule.TryGetProperty("fontFamily", out fontFamily))
{
fontFamily = "Arial"; // just some default font.
}
// a text is to be drawn.
string value;
if (node.Tags.TryGetValue(text, out value))
{
if (!pointId.HasValue)
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
}
scene.AddText(pointId.Value, this.CalculateSceneLayer(OffsetPointText, zIndex), minZoom, maxZoom, fontSize, value, textColor,
haloColorNullable, haloRadiusNullable, fontFamily);
}
}
}
}
