API 0.9.5
AppKit/CoreAnimation/CAMediaTimingFunction.j
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00001 /*
00002  * CAMediaTimingFunction.j
00003  * AppKit
00004  *
00005  * Created by Francisco Tolmasky.
00006  * Copyright 2008, 280 North, Inc.
00007  *
00008  * This library is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * This library is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with this library; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 
00024 
00025 kCAMediaTimingFunctionLinear        = @"kCAMediaTimingFunctionLinear";
00026 kCAMediaTimingFunctionEaseIn        = @"kCAMediaTimingFunctionEaseIn";
00027 kCAMediaTimingFunctionEaseOut       = @"kCAMediaTimingFunctionEaseOut";
00028 kCAMediaTimingFunctionEaseInEaseOut = @"kCAMediaTimingFunctionEaseInEaseOut";
00029 
00030 var CAMediaNamedTimingFunctions = nil;
00031 
00032 @implementation CAMediaTimingFunction : CPObject
00033 {
00034     float _c1x;
00035     float _c1y;
00036     float _c2x;
00037     float _c2y;
00038 }
00039 
00040 + (id)functionWithName:(CPString)aName
00041 {
00042     if (!CAMediaNamedTimingFunctions)
00043     {
00044         CAMediaNamedTimingFunctions = [CPDictionary dictionary];
00045 
00046         [CAMediaNamedTimingFunctions setObject:[CAMediaTimingFunction functionWithControlPoints:0.0 :0.0 :1.0 :1.0] forKey:kCAMediaTimingFunctionLinear];
00047         [CAMediaNamedTimingFunctions setObject:[CAMediaTimingFunction functionWithControlPoints:0.42 :0.0 :1.0 :1.0] forKey:kCAMediaTimingFunctionEaseIn];
00048         [CAMediaNamedTimingFunctions setObject:[CAMediaTimingFunction functionWithControlPoints:0.0 :0.0 :0.58 :1.0] forKey:kCAMediaTimingFunctionEaseOut];
00049         [CAMediaNamedTimingFunctions setObject:[CAMediaTimingFunction functionWithControlPoints:0.42 :0.0 :0.58 :1.0] forKey:kCAMediaTimingFunctionEaseInEaseOut];
00050     }
00051 
00052     return [CAMediaNamedTimingFunctions objectForKey:aName];
00053 }
00054 
00055 + (id)functionWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y
00056 {
00057     return [[self alloc] initWithControlPoints:c1x :c1y :c2x :c2y];
00058 }
00059 
00060 - (id)initWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y
00061 {
00062     self = [super init];
00063 
00064     if (self)
00065     {
00066         _c1x = c1x;
00067         _c1y = c1y;
00068         _c2x = c2x;
00069         _c2y = c2y;
00070     }
00071 
00072     return self;
00073 }
00074 
00075 - (void)getControlPointAtIndex:(unsigned)anIndex values:(float[2])reference
00076 {
00077     if (anIndex == 0)
00078     {
00079         reference[0] = 0;
00080         reference[1] = 0;
00081     }
00082     else if (anIndex == 1)
00083     {
00084         reference[0] = _c1x;
00085         reference[1] = _c1y;
00086     }
00087     else if (anIndex == 2)
00088     {
00089         reference[0] = _c2x;
00090         reference[1] = _c2y;
00091     }
00092     else
00093     {
00094         reference[0] = 1.0;
00095         reference[1] = 1.0;
00096     }
00097 }
00098 
00099 @end
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