/// <summary>
/// Sets the current geometry of this object.
/// </summary>
/// <param name="geometry">The new geometry to be set.</param>
/// <param name="flatteningTolerance">The maximum bounds on the distance between points in the polygonal approximation of the geometry. Smaller values produce more accurate results but cause slower execution.</param>
/// <param name="extrudeOptions">Additional options for extruding.</param>
internal void SetGeometry(
D2D.ID2D1Geometry geometry, float flatteningTolerance,
ExtrudeGeometryOptions extrudeOptions = ExtrudeGeometryOptions.None)
{
// Get triangles out of given geometry
List <D2D.Triangle[]>?generatedTriangles = null;
using (var tessellationSink = new ExtruderTessellationSink())
{
geometry.Tessellate(flatteningTolerance, tessellationSink);
generatedTriangles = tessellationSink.Triangles;
}
// Ensure that triangle list is created
if (_generatedTriangles == null)
{
_generatedTriangles = new List <D2D.Triangle[]>();
}
// Define methods for calculating bounds
var minX = float.MaxValue;
var maxX = float.MinValue;
var minY = float.MaxValue;
var maxY = float.MinValue;
var minPoint = Vector2.Zero;
void UpdateMinWidthHeight(PointF actCorner)
{
if (actCorner.X < minX)
{
minX = actCorner.X;
}
if (actCorner.X > maxX)
{
maxX = actCorner.X;
}
if (actCorner.Y < minY)
{
minY = actCorner.Y;
}
if (actCorner.Y > maxY)
{
maxY = actCorner.Y;
}
}
// Do some postprocessing
var triangleCount = 0;
var bounds = new SizeF();
foreach (var actTriangleArray in generatedTriangles)
{
foreach (var actTriangle in actTriangleArray)
{
UpdateMinWidthHeight(actTriangle.Point1);
UpdateMinWidthHeight(actTriangle.Point2);
UpdateMinWidthHeight(actTriangle.Point3);
triangleCount++;
}
}
if (triangleCount > 0)
{
bounds = new SizeF(maxX - minX, maxY - minY);
minPoint = new Vector2(minX, minY);
}
// Change with / height of the geometry depending on ExtrudeGeometryOptions
if (extrudeOptions.HasFlag(ExtrudeGeometryOptions.RescaleToUnitSize))
{
var scaleFactorX = !EngineMath.EqualsWithTolerance(bounds.Width, 0f) ? 1f / bounds.Width : 1f;
var scaleFactorY = !EngineMath.EqualsWithTolerance(bounds.Height, 0f) ? 1f / bounds.Height : 1f;
if (scaleFactorX < scaleFactorY)
{
scaleFactorY = scaleFactorX;
}
else
{
scaleFactorX = scaleFactorY;
}
foreach (var actTriangleArray in generatedTriangles)
{
for (var loop = 0; loop < actTriangleArray.Length; loop++)
{
var actTriangle = actTriangleArray[loop];
actTriangle.Point1 = new PointF(actTriangle.Point1.X * scaleFactorX, actTriangle.Point1.Y * scaleFactorY);
actTriangle.Point2 = new PointF(actTriangle.Point2.X * scaleFactorX, actTriangle.Point2.Y * scaleFactorY);
actTriangle.Point3 = new PointF(actTriangle.Point3.X * scaleFactorX, actTriangle.Point3.Y * scaleFactorY);
actTriangleArray[loop] = actTriangle;
}
}
bounds = new SizeF(
bounds.Width * scaleFactorX,
bounds.Height * scaleFactorY);
minPoint = new Vector2(minPoint.X * scaleFactorX, minPoint.Y * scaleFactorY);
}
// Change the origin depending on ExtrudeGeometryOptions
if (extrudeOptions.HasFlag(ExtrudeGeometryOptions.ChangeOriginToCenter))
{
var newOrigin = new Vector2(
minPoint.X + bounds.Width / 2f,
minPoint.Y + bounds.Height / 2f);
foreach (var actTriangleArray in generatedTriangles)
{
for (var loop = 0; loop < actTriangleArray.Length; loop++)
{
var actTriangle = actTriangleArray[loop];
actTriangle.Point1 = MathConverter.RawFromVector2(MathConverter.Vector2FromRaw(actTriangle.Point1) - newOrigin);
actTriangle.Point2 = MathConverter.RawFromVector2(MathConverter.Vector2FromRaw(actTriangle.Point2) - newOrigin);
actTriangle.Point3 = MathConverter.RawFromVector2(MathConverter.Vector2FromRaw(actTriangle.Point3) - newOrigin);
actTriangleArray[loop] = actTriangle;
}
}
minPoint = new Vector2(0f, 0f);
}
// Apply values
this.TriangleCount = triangleCount;
this.Bounds = bounds;
_generatedTriangles = generatedTriangles;
}
/// <summary>
/// Sets the current geometry of this object.
/// </summary>
/// <param name="geometry">The new geometry to be set.</param>
/// <param name="flatteningTolerance">The maximum bounds on the distance between points in the polygonal approximation of the geometry. Smaller values produce more accurate results but cause slower execution.</param>
/// <param name="extrudeOptions">Additional options for extruding.</param>
public void SetGeometry(
D2D.ID2D1Geometry geometry, float flatteningTolerance,
ExtrudeGeometryOptions extrudeOptions = ExtrudeGeometryOptions.None)
{
_owner.SetGeometry(geometry, flatteningTolerance, extrudeOptions);
}
