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

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intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h

/*		/*
* Copyright 2011-2014 Blender Foundation		* Copyright 2011-2014 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_ASHIKHMIN_SHIRLEY_H__
#define __BSDF_ASHIKHMIN_SHIRLEY_H__

/*		/*
ASHIKHMIN SHIRLEY BSDF		* ASHIKHMIN SHIRLEY BSDF
		*
Implementation of		* Implementation of
Michael Ashikhmin and Peter Shirley: "An Anisotropic Phong BRDF Model" (2000)		* Michael Ashikhmin and Peter Shirley: "An Anisotropic Phong BRDF Model" (2000)
		*
The Fresnel factor is missing to get a separable bsdf (intensity*color), as is		* The Fresnel factor is missing to get a separable bsdf (intensity*color), as is
the case with all other microfacet-based BSDF implementations in Cycles.		* the case with all other microfacet-based BSDF implementations in Cycles.
		*
Other than that, the implementation directly follows the paper.		* Other than that, the implementation directly follows the paper.
*/		*/

		#pragma once

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

ccl_device int bsdf_ashikhmin_shirley_setup(MicrofacetBsdf *bsdf)		ccl_device int bsdf_ashikhmin_shirley_setup(MicrofacetBsdf *bsdf)
{		{
bsdf->alpha_x = clamp(bsdf->alpha_x, 1e-4f, 1.0f);		bsdf->alpha_x = clamp(bsdf->alpha_x, 1e-4f, 1.0f);
bsdf->alpha_y = clamp(bsdf->alpha_y, 1e-4f, 1.0f);		bsdf->alpha_y = clamp(bsdf->alpha_y, 1e-4f, 1.0f);

bsdf->type = CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID;		bsdf->type = CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID;
▲ Show 20 Lines • Show All 195 Lines • ▼ Show 20 Lines	#ifdef __RAY_DIFFERENTIALS__
domega_in_dy = (2.0f dot(N, dIdy)) * N - dIdy;		domega_in_dy = (2.0f dot(N, dIdy)) * N - dIdy;
#endif		#endif
}		}

return label;		return label;
}		}

CCL_NAMESPACE_END		CCL_NAMESPACE_END

#endif /* __BSDF_ASHIKHMIN_SHIRLEY_H__ */