Differential D12367 Diff 41308 intern/cycles/kernel/closure/bsdf_oren_nayar.h

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intern/cycles/kernel/closure/bsdf_oren_nayar.h

/*		/*
* Copyright 2011-2013 Blender Foundation		* Copyright 2011-2013 Blender Foundation
*		*
* Licensed under the Apache License, Version 2.0 (the "License");		* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.		* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at		* You may obtain a copy of the License at
*		*
* http://www.apache.org/licenses/LICENSE-2.0		* http://www.apache.org/licenses/LICENSE-2.0
*		*
* Unless required by applicable law or agreed to in writing, software		* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,		* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and		* See the License for the specific language governing permissions and
* limitations under the License.		* limitations under the License.
*/		*/

#ifndef __BSDF_OREN_NAYAR_H__		#pragma once
#define __BSDF_OREN_NAYAR_H__

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

typedef ccl_addr_space struct OrenNayarBsdf {		typedef ccl_addr_space struct OrenNayarBsdf {
SHADER_CLOSURE_BASE;		SHADER_CLOSURE_BASE;

float roughness;		float roughness;
float a;		float a;
Show All 29 Lines	ccl_device int bsdf_oren_nayar_setup(OrenNayarBsdf *bsdf)
float div = 1.0f / (M_PI_F + ((3.0f * M_PI_F - 4.0f) / 6.0f) * sigma);		float div = 1.0f / (M_PI_F + ((3.0f * M_PI_F - 4.0f) / 6.0f) * sigma);

bsdf->a = 1.0f * div;		bsdf->a = 1.0f * div;
bsdf->b = sigma * div;		bsdf->b = sigma * div;

return SD_BSDF \| SD_BSDF_HAS_EVAL;		return SD_BSDF \| SD_BSDF_HAS_EVAL;
}		}

ccl_device bool bsdf_oren_nayar_merge(const ShaderClosure a, const ShaderClosure b)
{
const OrenNayarBsdf bsdf_a = (const OrenNayarBsdf )a;
const OrenNayarBsdf bsdf_b = (const OrenNayarBsdf )b;

return (isequal_float3(bsdf_a->N, bsdf_b->N)) && (bsdf_a->roughness == bsdf_b->roughness);
}

ccl_device float3 bsdf_oren_nayar_eval_reflect(const ShaderClosure *sc,		ccl_device float3 bsdf_oren_nayar_eval_reflect(const ShaderClosure *sc,
const float3 I,		const float3 I,
const float3 omega_in,		const float3 omega_in,
float *pdf)		float *pdf)
{		{
const OrenNayarBsdf bsdf = (const OrenNayarBsdf )sc;		const OrenNayarBsdf bsdf = (const OrenNayarBsdf )sc;
if (dot(bsdf->N, omega_in) > 0.0f) {		if (dot(bsdf->N, omega_in) > 0.0f) {
pdf = 0.5f M_1_PI_F;		pdf = 0.5f M_1_PI_F;
▲ Show 20 Lines • Show All 42 Lines • ▼ Show 20 Lines	else {
*pdf = 0.0f;		*pdf = 0.0f;
*eval = make_float3(0.0f, 0.0f, 0.0f);		*eval = make_float3(0.0f, 0.0f, 0.0f);
}		}

return LABEL_REFLECT \| LABEL_DIFFUSE;		return LABEL_REFLECT \| LABEL_DIFFUSE;
}		}

CCL_NAMESPACE_END		CCL_NAMESPACE_END

#endif /* __BSDF_OREN_NAYAR_H__ */