OOPointMaths.h File Reference

import "OOFunctionAttributes.h"
#include <tgmath.h>

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Functions
OOINLINE NSPoint	PtAdd (NSPoint a, NSPoint b)
OOINLINE NSPoint	PtSub (NSPoint a, NSPoint b)
OOINLINE NSPoint	PtScale (NSPoint p, CGFloat scale)
OOINLINE CGFloat	PtDot (NSPoint a, NSPoint b)
OOINLINE CGFloat	PtCross (NSPoint a, NSPoint b)
OOINLINE NSPoint	PtRotCW (NSPoint p)
OOINLINE NSPoint	PtRotACW (NSPoint p)
OOINLINE NSPoint	PtNormal (NSPoint p)

Function Documentation

PtAdd()

OOINLINE NSPoint PtAdd	(	NSPoint	a,
		NSPoint	b )

Definition at line 6 of file OOPointMaths.h.

{
    return NSMakePoint(a.x + b.x, a.y + b.y);
}

Referenced by BuildOutlineContour().

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PtCross()

OOINLINE CGFloat PtCross	(	NSPoint	a,
		NSPoint	b )

Definition at line 26 of file OOPointMaths.h.

{
    return a.x * b.y - b.x * a.y;
}

Referenced by BuildOutlineContour().

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PtDot()

OOINLINE CGFloat PtDot	(	NSPoint	a,
		NSPoint	b )

Definition at line 21 of file OOPointMaths.h.

{
    return a.x * b.x + a.y * b.y;
}

Referenced by BuildOutlineContour(), and PtNormal().

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PtNormal()

OOINLINE NSPoint PtNormal

(

NSPoint

p

)

Definition at line 43 of file OOPointMaths.h.

{
    return PtScale(p, 1.0 / sqrt(PtDot(p, p)));
}

References PtDot(), and PtScale().

Referenced by BuildOutlineContour().

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PtRotACW()

OOINLINE NSPoint PtRotACW

(

NSPoint

p

)

Definition at line 37 of file OOPointMaths.h.

{
    // Rotate 90 degrees anticlockwise.
    return NSMakePoint(-p.y, p.x);
}

Referenced by BuildOutlineContour().

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PtRotCW()

OOINLINE NSPoint PtRotCW

(

NSPoint

p

)

Definition at line 31 of file OOPointMaths.h.

{
    // Rotate 90 degrees clockwise.
    return NSMakePoint(p.y, -p.x);
}

PtScale()

OOINLINE NSPoint PtScale	(	NSPoint	p,
		CGFloat	scale )

Definition at line 16 of file OOPointMaths.h.

{
    return NSMakePoint(p.x * scale, p.y * scale);
}

Referenced by BuildOutlineContour(), and PtNormal().

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PtSub()

OOINLINE NSPoint PtSub	(	NSPoint	a,
		NSPoint	b )

Definition at line 11 of file OOPointMaths.h.

{
    return NSMakePoint(a.x - b.x, a.y - b.y);
}

Referenced by BuildOutlineContour().

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