Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Shared / MS / Internal / FloatUtil.cs / 1 / FloatUtil.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: FloatUtil.cs // // Description: This file contains the implementation of FloatUtil, which // provides "fuzzy" comparison functionality for floats and // float-based classes and structs in our code. // // History: // 04/28/2003 : [....] - Created this header // 05/20/2003 : [....] - Move to Shared. // //--------------------------------------------------------------------------- using System; namespace MS.Internal { internal static class FloatUtil { internal static float FLT_EPSILON = 1.192092896e-07F; internal static float FLT_MAX_PRECISION = 0xffffff; internal static float INVERSE_FLT_MAX_PRECISION = 1.0F / FLT_MAX_PRECISION; ////// AreClose /// public static bool AreClose(float a, float b) { if(a == b) return true; // This computes (|a-b| / (|a| + |b| + 10.0f)) < FLT_EPSILON float eps = ((float)Math.Abs(a) + (float)Math.Abs(b) + 10.0f) * FLT_EPSILON; float delta = a - b; return(-eps < delta) && (eps > delta); } ////// IsOne /// public static bool IsOne(float a) { return (float)Math.Abs(a-1.0f) < 10.0f * FLT_EPSILON; } ////// IsZero /// public static bool IsZero(float a) { return (float)Math.Abs(a) < 10.0f * FLT_EPSILON; } ////// IsCloseToDivideByZero /// public static bool IsCloseToDivideByZero(float numerator, float denominator) { // When updating this, please also update code in Arithmetic.h return Math.Abs(denominator) <= Math.Abs(numerator) * INVERSE_FLT_MAX_PRECISION; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- RegisteredHiddenField.cs
- MailWriter.cs
- XmlMtomWriter.cs
- ConvertEvent.cs
- FormViewInsertedEventArgs.cs
- MDIWindowDialog.cs
- Table.cs
- X509RecipientCertificateServiceElement.cs
- ScrollChangedEventArgs.cs
- DataSourceIDConverter.cs
- CommandEventArgs.cs
- ListViewSortEventArgs.cs
- ResourceKey.cs
- Root.cs
- WebPartUserCapability.cs
- HtmlShimManager.cs
- VisualStyleElement.cs
- DbDataReader.cs
- DataGridItemEventArgs.cs
- TagPrefixCollection.cs
- EditorZoneDesigner.cs
- SafeNativeMethods.cs
- OleDbRowUpdatedEvent.cs
- SourceInterpreter.cs
- EntityDataSourceContextCreatedEventArgs.cs
- ConnectionsZone.cs
- FormsAuthenticationEventArgs.cs
- CharacterHit.cs
- CheckBoxStandardAdapter.cs
- TableAdapterManagerGenerator.cs
- Normalizer.cs
- DockProviderWrapper.cs
- ContentFileHelper.cs
- ProtocolsConfigurationHandler.cs
- GreenMethods.cs
- HttpModuleAction.cs
- ScriptingProfileServiceSection.cs
- BindingValueChangedEventArgs.cs
- Label.cs
- AxisAngleRotation3D.cs
- DataFieldConverter.cs
- XmlIterators.cs
- PointCollection.cs
- PrintSystemException.cs
- ReliableSessionBindingElement.cs
- VectorConverter.cs
- XmlSerializableWriter.cs
- QueryOutputWriter.cs
- ProjectionPruner.cs
- dbenumerator.cs
- ScrollItemPatternIdentifiers.cs
- Table.cs
- AstNode.cs
- DataGridViewSelectedColumnCollection.cs
- XmlSchemaSimpleType.cs
- TouchFrameEventArgs.cs
- ResourceKey.cs
- GlyphingCache.cs
- ButtonFieldBase.cs
- SmiEventSink_DeferedProcessing.cs
- HtmlTernaryTree.cs
- SecUtil.cs
- Soap12ServerProtocol.cs
- assemblycache.cs
- WhitespaceRule.cs
- ObjectQuery_EntitySqlExtensions.cs
- CompositeDataBoundControl.cs
- PreProcessor.cs
- DataObjectPastingEventArgs.cs
- TaiwanCalendar.cs
- KeyedCollection.cs
- BamlLocalizableResource.cs
- NativeMethods.cs
- EnvironmentPermission.cs
- CounterSetInstanceCounterDataSet.cs
- XmlnsPrefixAttribute.cs
- ScrollBarRenderer.cs
- Point3D.cs
- SimpleApplicationHost.cs
- DataGridViewRowPostPaintEventArgs.cs
- UrlAuthFailedErrorFormatter.cs
- DigitShape.cs
- XDeferredAxisSource.cs
- CommentEmitter.cs
- PathParser.cs
- DrawTreeNodeEventArgs.cs
- BinaryUtilClasses.cs
- StatusBarPanelClickEvent.cs
- EntityDesignerDataSourceView.cs
- NavigationHelper.cs
- MissingManifestResourceException.cs
- PropertyTab.cs
- NativeRightsManagementAPIsStructures.cs
- Operand.cs
- Exception.cs
- RequiredFieldValidator.cs
- Literal.cs
- TextWriterTraceListener.cs
- GeneralTransform3DCollection.cs
- GridViewItemAutomationPeer.cs