private TriangulationList <Vector3> CreateScaleBar(float modelSize4326, float modelSizeProjected, float radius = 10f)
{
int nSteps = 4;
ScaleBarInfo scaleInfo = GetScaleBarWidth(modelSize4326, modelSizeProjected, scaleBarSizeRelativeToModel: 0.5f, nSteps);
Vector3 currentPosition = Vector3.Zero;
TriangulationList <Vector3> triangulation = new TriangulationList <Vector3>();
for (int i = 0; i < nSteps; i++)
{
currentPosition.Z = scaleInfo.StepSizeProjected * i;
triangulation += _meshService.CreateCylinder(currentPosition, radius, scaleInfo.StepSizeProjected
, color: i % 2 == 0 ? VectorsExtensions.CreateColor(0, 0, 0) : VectorsExtensions.CreateColor(255, 255, 255));
}
// scale units (m or km ?)
string scaleLabel = (scaleInfo.TotalSize / 1000f > 1) ? $"{scaleInfo.TotalSize / 1000:F0} km" : $"{scaleInfo.TotalSize} m";
triangulation += CreateText(scaleLabel, color: VectorsExtensions.CreateColor(255, 255, 255))
.Scale(radius / 5)
.RotateY((float)Math.PI / 2)
.RotateZ((float)Math.PI / 2)
.Translate(new Vector3(radius * 5, -radius, scaleInfo.TotalSizeProjected / 2));
return(triangulation);
}
public TriangulationList <Vector3> CreateModelAdornments(DEMDataSet dataset, ImageryProvider imageryProvider, BoundingBox bboxDemSpace, BoundingBox bboxModelSpace)
{
var width = (float)new GeoPoint(latitude: bboxDemSpace.Center[1],
longitude: bboxDemSpace.Center[0] - bboxDemSpace.Width / 2f)
.DistanceTo(
new GeoPoint(latitude: bboxDemSpace.Center[1],
longitude: bboxDemSpace.Center[0] + bboxDemSpace.Width / 2f)
);
// bbox size
float projHeight = (float)bboxModelSpace.Height;
float arrowSizeFactor = projHeight / 3f;
float zCenter = (float)bboxModelSpace.Center[2];
float projWidth = (float)bboxModelSpace.Width;
//
float PI = (float)Math.PI;
// Arrow
TriangulationList <Vector3> adornments = _meshService.CreateArrow().ToGlTFSpace()
.Scale(arrowSizeFactor)
.Translate(new Vector3(-projWidth * 0.55f, 0, zCenter));
// North text 'N'
adornments += this.CreateText("N", VectorsExtensions.CreateColor(255, 255, 255)).ToGlTFSpace()
.Scale(projHeight / 200f / 5f)
.RotateX(-PI / 2)
.Translate(new Vector3(-projWidth * 0.55f, arrowSizeFactor * 1.1f, zCenter));
// Scale bar
var scaleBar = this.CreateScaleBar(width, projWidth, radius: projHeight / 200f).ToGlTFSpace();
var scaleBarSize = scaleBar.GetBoundingBox().Height;
adornments += scaleBar
.RotateZ(PI / 2f)
.Translate(new Vector3(projWidth / 2, -projHeight / 2 - projHeight * 0.05f, zCenter));
var text = $"{dataset.Attribution.Subject}: {dataset.Attribution.Text}";
if (imageryProvider != null)
{
text = string.Concat(text, $"{Environment.NewLine}{imageryProvider.Attribution.Subject}: {imageryProvider.Attribution.Text}");
}
var text3D = this.CreateText(text, VectorsExtensions.CreateColor(255, 255, 255)).ToGlTFSpace();
var textWidth = (float)text3D.GetBoundingBox().Width;
var scale = (float)(((projWidth - scaleBarSize) * 0.9f) / textWidth);
text3D = text3D.Scale((float)scale)
.RotateX(-PI / 2)
.Translate(new Vector3((-projWidth + textWidth * scale) / 2f, -projHeight * 0.55f, zCenter));
adornments += text3D;
return(adornments);
}