//--------------------------------------------------------------------------------------------------
public bool ComputeParameters(out Parameters parameters)
{
if (FirstPoint.IsEqual(SecondPoint, 0.01))
{
parameters = new();
return(false);
}
double scale = 1.0;
// Dimension line direction
var dimDir = new Vec2d(_FirstPoint, _SecondPoint).ToDir();
var dimMid = _FirstPoint.Lerped(_SecondPoint, 0.5);
var dimWidth = _FirstPoint.Distance(_SecondPoint);
scale = Math.Min(scale, dimWidth / (DrawingRenderHelper.GetArrowSize().Length * 3));
if (_AutoText)
{
Text = dimWidth.ToInvariantString("F1");
}
var rotation = dimDir.Angle(Dir2d.DX);
bool dimRightToLeft = false;
if (rotation < -Maths.HalfPI)
{
rotation += Maths.PI;
dimRightToLeft = true;
}
else if (rotation > Maths.HalfPI)
{
rotation -= Maths.PI;
dimRightToLeft = true;
}
// Extension line
var extDir = new Dir2d(dimDir.Y, -dimDir.X);
if (dimDir.Angle(new Vec2d(dimMid, Position).ToDir()) > 0)
{
extDir.Reverse();
}
var dimToPos = new gp_Lin2d(_FirstPoint, dimDir).Distance(Position);
var extVector = extDir.ToVec(dimToPos + _ExtensionOverlength);
var dimOffset = extDir.ToVec(dimToPos);
// Text
var textOrigin = _FirstPoint.Lerped(_SecondPoint, 0.5)
.Translated(dimOffset);
var textWidth = 1.0;
var textHeight = 1.0;
var textScale = scale;
if (!Text.IsNullOrWhiteSpace())
{
var fontStyle = DrawingRenderHelper.GetDefaultFontStyle();
var textSize = DrawingRenderHelper.MeasureText(Text, fontStyle);
textScale = Math.Min(1.0, dimWidth * 0.90 / textSize.X);
scale = Math.Min(scale, textScale);
// Exact positioning on above dim line
var textOffset = dimDir.Angle(extDir) > 0 ? 1.0 : -1.0;
if (dimRightToLeft)
{
textOffset *= -1;
}
textOrigin.Translate(extDir.ToVec(textOffset));
// Center
textOrigin.Translate(dimDir.ToVec((dimRightToLeft ? 1.0 : -1.0) * textSize.X / 2 * textScale));
textWidth = textSize.X * textScale;
textHeight = textSize.Y * textScale;
}
parameters = new Parameters()
{
ExtensionVector = extVector,
DimensionDirection = dimDir,
DimensionOffset = dimOffset,
DimensionRotation = rotation,
TextOrigin = textOrigin,
TextWidth = textWidth,
TextHeight = textHeight,
Scale = scale,
TextScale = textScale
};
return(true);
}