Map worldspace Position into UVW space

What I came up with is this. Any thoughts?

float Remap( float value, float inMin, float inMax, float outMin, float outMax )
{
	float mappedValue = value;

	if ( ( inMax - inMin ) == 0.0f )
	{
		mappedValue = ( outMax + outMin ) * 0.5f;
	}
	else
	{
		mappedValue = outMin + ( ( ( mappedValue - inMin ) / ( inMax - inMin ) ) * ( outMax - outMin ) );
	}

	return mappedValue;
}

float2 RangeMapFloat2( float2 value, float2 inMin, float2 inMax, float2 outMin, float2 outMax )
{
	float2 mappedValue = value;

	if ( ( inMax - inMin ).x == 0 &&  ( inMax - inMin ).y == 0)
	{
		mappedValue = ( outMax + outMin ) * 0.5f;
	}
	else
	{
		mappedValue = outMin + ( ( ( mappedValue - inMin ) / ( inMax - inMin ) ) * ( outMax - outMin ) );
	}

	return mappedValue;
}

//inMinMaxCloudLayer = (InnerRadius+1500, InnerRadius+4000)
float3 GetSampleUVW(float3 pos)
{
	float3 uvw;
	float radius = length(pos);
	float halfArcLength = 2*(inMinMaxCloudLayer.y-inMinMaxCloudLayer.x);
	float xRadius = length(float2(pos.x, pos.y));
	float xArcThetaRadians = halfArcLength / xRadius;
	float xMax = xRadius * sin(xArcThetaRadians);
	float zRadius = length(float2(pos.z, pos.y));
	float zArcThetaRadians = halfArcLength / zRadius;
	float zMax = zRadius * sin(zArcThetaRadians);

	float2 uvMappedXZ = RangeMapFloat2(pos.xz, float2(-xMax, -zMax), float2(xMax, zMax), float2(0, 0), float2(1, 1));
	uvw.x = uvMappedXZ.x;
	uvw.y = Remap(radius, (radius-inMinMaxCloudLayer.x), (inMinMaxCloudLayer.y-radius), 0.0f, 1.0f);
	uvw.z = uvMappedXZ.y;
	return uvw;
}

Is above code ok?