libexe/performance.c


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// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962

// GLubyte poseimg;
#define junk 1
void            solve( VERT );


static float
spline( float p1, float p2, float p3, float p4, float u )
{
	float           ret;
	float           u3, u2;

	if( u > 1 )
		u = 1;
	if( u < 0 )
		u = 0;
	u3 = u * u * u;
	u2 = u * u;
	ret = ( ( -u3 + ( 2 * u2 ) - u ) * p1 / 2.0 + ( 3 * u3 - 5 * u2 + 2.0 ) * p2 / 2.0 + ( -3 * u3 + ( 4 * u2 ) + u ) * p3 / 2.0 + ( u3 + -u2 ) * p4 / 2.0 );
	return ( ret );
}