70 lines
2.9 KiB
C#
70 lines
2.9 KiB
C#
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#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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namespace PdfSharp
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{
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/// <summary>
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/// Floating point formatting.
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/// </summary>
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static class Config
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{
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public const string SignificantFigures2 = "0.##";
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public const string SignificantFigures3 = "0.###";
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public const string SignificantFigures4 = "0.####";
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public const string SignificantFigures7 = "0.#######";
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public const string SignificantFigures10 = "0.##########";
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public const string SignificantFigures1Plus9 = "0.0#########";
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}
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static class Const
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{
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/// <summary>
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/// Factor to convert from degree to radian measure.
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/// </summary>
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public const double Deg2Rad = Math.PI / 180; // = 0.017453292519943295
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/// <summary>
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/// Sinus of the angle to turn a regular font to look oblique. Used for italic simulation.
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/// </summary>
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public const double ItalicSkewAngleSinus = 0.34202014332566873304409961468226; // = sin(20°)
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/// <summary>
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/// Factor of the em size of a regular font to look bold. Used for bold simulation.
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/// Value of 2% found in original XPS 1.0 documentation.
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/// </summary>
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public const double BoldEmphasis = 0.02;
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// The κ (kappa) for drawing a circle or an ellipse with four Bézier splines, specifying the distance of the influence point from the starting or end point of a spline.
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// Petzold: 4/3 * tan(α / 4)
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public const double κ = 0.5522847498307933984022516322796; // := 4/3 * (1 - cos(-π/4)) / sin(π/4)) <=> 4/3 * (sqrt(2) - 1) <=> 4/3 * tan(π/8)
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}
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}
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