src/engine/eRectangle.cpp File Reference

#include "eRectangle.h"
#include "tError.h"

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Functions
static void	se_Clamp (REAL &toClamp, REAL reference, REAL direction, REAL &max)
static REAL	se_Clip (eCoord const &start, eCoord &stop, eCoord const &reference, eCoord const &normal)

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Function Documentation

static void se_Clamp	(	REAL &	toClamp,
		REAL	reference,
		REAL	direction,
		REAL &	max
	)			[inline, static]

Definition at line 120 of file eRectangle.cpp.

References REAL.

Referenced by eRectangle::Clamp().

{
    REAL move = (toClamp - reference)*direction;
    if (move > max)
        max = move;
    if (move > 0)
        toClamp = reference;
}

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static REAL se_Clip	(	eCoord const &	start,
		eCoord &	stop,
		eCoord const &	reference,
		eCoord const &	normal
	)			[inline, static]

Definition at line 152 of file eRectangle.cpp.

References in, and REAL.

Referenced by eRectangle::Clip().

{
    // calculate how far out on the other side of the reference point the stop point is
    REAL out = eCoord::F( normal, stop-reference );
    if ( out <= 0 )
        return 1; // nothing to clamp

    // calculate how far inside the startpoint lies
    REAL in = eCoord::F( normal, reference-start );
    if ( in < 0 )
        in = 0;

    // clip
    if ( out+in > 0 )
    {
        stop = (start * out + stop * in)*(1/(in+out));
        return in/(in+out);
    }

    return 1;
}

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