RMPixel.c
2.05 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
//
// RMPixel.c
//
// Copyright (c) 2008-2013, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#include "RMPixel.h"
CGPoint RMScaleCGPointAboutPoint(CGPoint point, float factor, CGPoint pivot)
{
point.x = (point.x - pivot.x) * factor + pivot.x;
point.y = (point.y - pivot.y) * factor + pivot.y;
return point;
}
CGRect RMScaleCGRectAboutPoint(CGRect rect, float factor, CGPoint pivot)
{
rect.origin = RMScaleCGPointAboutPoint(rect.origin, factor, pivot);
rect.size.width *= factor;
rect.size.height *= factor;
return rect;
}
CGPoint RMTranslateCGPointBy(CGPoint point, CGSize delta)
{
point.x += delta.width;
point.y += delta.height;
return point;
}
CGRect RMTranslateCGRectBy(CGRect rect, CGSize delta)
{
rect.origin = RMTranslateCGPointBy(rect.origin, delta);
return rect;
}