liberscribble/include/scbutil.h File Reference

#include <scbtype.h>
#include <glib.h>
#include <scbpoint.h>

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Functions
gboolean	scb_is_rect_intersect (const ScbRectPtr rect1, const ScbRectPtr rect2)
gboolean	scb_is_lines_intersect (const ScbPointPtr p1, const ScbPointPtr p2, const ScbPointPtr p3, const ScbPointPtr p4)

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Function Documentation

gboolean scb_is_lines_intersect	(	const ScbPointPtr	p1,
		const ScbPointPtr	p2,
		const ScbPointPtr	p3,
		const ScbPointPtr	p4
	)

Definition at line 89 of file scbutil.c.

{
    gboolean bRet = ((( CCW(p1, p2, p3) * CCW(p1, p2, p4)) <= 0)
        && (( CCW(p3, p4, p1) * CCW(p3, p4, p2)  <= 0) )) ;

   
    return bRet;
}

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gboolean scb_is_rect_intersect	(	const ScbRectPtr	rect1,
		const ScbRectPtr	rect2
	)

Copyright (C) 2005-2008 iRex Technologies B.V. All rights reserved.

Definition at line 78 of file scbutil.c.

{
    return ! ( r2->left > r1->right 
        || r2->right < r1->left 
        || r2->top > r1->bottom 
        || r2->bottom < r1->top 
        );
}