#line 2 "epsilon_funcs.cl"

/***************************************************************************
 * Copyright 1998-2015 by authors (see AUTHORS.txt)                        *
 *                                                                         *
 *   This file is part of LuxRender.                                       *
 *                                                                         *
 * Licensed under the Apache License, Version 2.0 (the "License");         *
 * you may not use this file except in compliance with the License.        *
 * You may obtain a copy of the License at                                 *
 *                                                                         *
 *     http://www.apache.org/licenses/LICENSE-2.0                          *
 *                                                                         *
 * Unless required by applicable law or agreed to in writing, software     *
 * distributed under the License is distributed on an "AS IS" BASIS,       *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.*
 * See the License for the specific language governing permissions and     *
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 ***************************************************************************/

float MachineEpsilon_FloatAdvance(const float value) {
	return as_float(as_uint(value) + DEFAULT_EPSILON_DISTANCE_FROM_VALUE);
}

float MachineEpsilon_E(const float value) {
	const float epsilon = fabs(MachineEpsilon_FloatAdvance(value) - value);

	return clamp(epsilon, PARAM_RAY_EPSILON_MIN, PARAM_RAY_EPSILON_MAX);
}

float MachineEpsilon_E_Float3(const float3 v) {
	return fmax(MachineEpsilon_E(v.x), fmax(MachineEpsilon_E(v.y), MachineEpsilon_E(v.z)));
}
