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(root)/iphone/common : 66 : source/geometry.h

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Dömötör Gulyás
2010-07-07 13:18:11
Revision ID: dognotdog@gmail.com-20100707111811-v0bkv813ukxe2d7d
adds gfx.h/m from RemoteDriver; extends geometry.h with size scaling, point lerp and rotation

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source/geometry.h
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        return CGPointMake(a.x*b, a.y*b);
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}
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static inline CGSize CGSizeScale(CGSize a, float b)
 
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{
 
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        return CGSizeMake(a.width*b, a.height*b);
 
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}
 
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static inline float CGPointDoubleDot(CGPoint a)
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{
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        return a.x*a.x+a.y*a.y;
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        return CGPointScale(b, CGPointDot(a,a)/CGPointDot(a,b));
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}
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static inline CGPoint CGPointLerp(CGPoint a, CGPoint b, float t)
 
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{
 
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        return CGPointAdd(a, CGPointScale(CGPointSub(b, a), t));
 
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}
 
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static inline CGPoint CGPointRotate(CGPoint a, float w)
 
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{
 
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        CGPoint cross = CGPointMake(a.y,-a.x);
 
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        float cosa = cosf(w), sina = sin(w);
 
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        CGPoint r;
 
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        r.x = a.x*cosa + cross.x*sina;
 
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        r.y = a.y*cosa + cross.y*sina;
 
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        return r;
 
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}
 
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static inline long CGLineSegmentsIntersect2(CGPoint p0, CGPoint p1, CGPoint p2, CGPoint p3)
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{

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