/// <summary>
/// Translates a way.
/// </summary>
/// <param name="scene">The scene to add primitives to.</param>
/// <param name="projection">The projection used to convert the objects.</param>
/// <param name="way"></param>
private void TranslateWay(Scene2D scene, IProjection projection, CompleteWay way)
{
// build the rules.
List <MapCSSRuleProperties> rules =
this.BuildRules(new MapCSSObject(way));
// validate what's there.
if (rules.Count == 0)
{
return;
}
// get x/y.
double[] x = null, y = null;
if (x == null)
{ // pre-calculate x/y.
x = new double[way.Nodes.Count];
y = new double[way.Nodes.Count];
for (int idx = 0; idx < way.Nodes.Count; idx++)
{
x[idx] = projection.LongitudeToX(
way.Nodes[idx].Coordinate.Longitude);
y[idx] = projection.LatitudeToY(
way.Nodes[idx].Coordinate.Latitude);
}
// simplify.
if (x.Length > 2)
{
double[][] simplified = SimplifyCurve.Simplify(new double[][] { x, y }, 0.0001);
x = simplified[0];
y = simplified[1];
}
}
// add the z-index.
foreach (var rule in rules)
{
float minZoom = (float)projection.ToZoomFactor(rule.MinZoom);
float maxZoom = (float)projection.ToZoomFactor(rule.MaxZoom);
int zIndex;
if (!rule.TryGetProperty <int>("zIndex", out zIndex))
{
zIndex = 0;
}
// interpret the results.
if (x != null)
{ // there is a valid interpretation of this way.
int color;
if (way.IsOfType(MapCSSTypes.Area))
{ // the way is an area. check if it can be rendered as an area.
int fillColor;
if (rule.TryGetProperty("fillColor", out fillColor))
{ // render as an area.
scene.AddPolygon(this.CalculateSceneLayer(OffsetArea, zIndex), minZoom, maxZoom, x, y, fillColor, 1, true);
if (rule.TryGetProperty("color", out color))
{
scene.AddPolygon(this.CalculateSceneLayer(OffsetCasing, zIndex), minZoom, maxZoom, x, y, color, 1, false);
}
}
}
// the way has to rendered as a line.
LineJoin lineJoin;
if (!rule.TryGetProperty("lineJoin", out lineJoin))
{
lineJoin = LineJoin.Miter;
}
int[] dashes;
if (!rule.TryGetProperty("dashes", out dashes))
{
dashes = null;
}
if (rule.TryGetProperty("color", out color))
{
float casingWidth;
int casingColor;
if (!rule.TryGetProperty("casingWidth", out casingWidth))
{
casingWidth = 0;
}
if (!rule.TryGetProperty("casingColor", out casingColor))
{ // casing: use the casing layer.
casingColor = -1;
}
float width;
if (!rule.TryGetProperty("width", out width))
{
width = 1;
}
if (casingWidth > 0)
{ // adds the casing
scene.AddLine(this.CalculateSceneLayer(OffsetCasing, zIndex),
minZoom, maxZoom, x, y, casingColor, width + (casingWidth * 2), lineJoin, dashes);
}
if (dashes == null)
{ // dashes not set, use line offset.
scene.AddLine(this.CalculateSceneLayer(OffsetLine, zIndex),
minZoom, maxZoom, x, y, color, width, lineJoin, dashes);
}
else
{ // dashes set, use line pattern offset.
scene.AddLine(this.CalculateSceneLayer(OffsetLinePattern, zIndex),
minZoom, maxZoom, x, y, color, width, lineJoin, dashes);
}
int textColor;
int fontSize;
string nameTag;
if (!rule.TryGetProperty("fontSize", out fontSize))
{
fontSize = 10;
}
if (rule.TryGetProperty("text", out nameTag) &&
rule.TryGetProperty("textColor", out textColor))
{
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;
}
string name;
if (way.Tags.TryGetValue(nameTag, out name))
{
scene.AddTextLine(this.CalculateSceneLayer(OffsetLineText, zIndex),
minZoom, maxZoom, x, y, textColor, fontSize, name, haloColorNullable, haloRadiusNullable);
}
}
}
}
}
}