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update Centroid, GetWidthHeight and tests

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This commit is contained in:
BobLd
2020-02-17 01:00:27 +00:00
committed by Eliot Jones
parent 2c8c6cda87
commit d2ac2f598a
3 changed files with 213 additions and 44 deletions
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31
src/UglyToad.PdfPig.Core/PdfRectangle.cs
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@@ -1,6 +1,7 @@
namespace UglyToad.PdfPig.Core
{
using System;
using System.Linq;
/// <summary>
/// A rectangle in a PDF file.
@@ -39,16 +40,8 @@
{
get
{
var t = GetT();
var cosT = Math.Cos(t);
var sinT = Math.Sin(t);
var cx = Math.Min(BottomRight.X, Math.Min(TopLeft.X, Math.Min(BottomLeft.X, TopRight.X)))
+ (Width * cosT + Height * sinT) / 2.0;
var cy = Math.Min(BottomRight.Y, Math.Min(TopLeft.Y, Math.Min(BottomLeft.Y, TopRight.Y)))
+ (Height * cosT + Width * sinT) / 2.0;
var cx = (BottomRight.X + TopRight.X + TopLeft.X + BottomLeft.X) / 4.0;
var cy = (BottomRight.Y + TopRight.Y + TopLeft.Y + BottomLeft.Y) / 4.0;
return new PdfPoint(cx, cy);
}
}
@@ -94,9 +87,7 @@
{
get
{
var rotation = GetT() * 180 / Math.PI;
return rotation;
return GetT() * 180 / Math.PI;
}
}
@@ -201,17 +192,9 @@
private void GetWidthHeight()
{
var bx = Math.Max(Math.Abs(BottomRight.X - TopLeft.X), Math.Abs(BottomLeft.X - TopRight.X));
var by = Math.Max(Math.Abs(TopRight.Y - BottomLeft.Y), Math.Abs(TopLeft.Y - BottomRight.Y));
var t = GetT();
var cosT = Math.Cos(t);
var sinT = Math.Sin(t);
var cosSqSinSqInv = 1.0 / (cosT * cosT - sinT * sinT);
width = cosSqSinSqInv * (bx * cosT - by * sinT);
height = cosSqSinSqInv * (-bx * sinT + by * cosT);
var tm = TransformationMatrix.GetRotationMatrix(Rotation).Inverse();
width = tm.Transform(BottomRight).X - tm.Transform(BottomLeft).X;
height = tm.Transform(TopLeft).Y - tm.Transform(BottomLeft).Y;
}
/// <inheritdoc />