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Diffstat (limited to 'intern/cycles/kernel/osl/bssrdf.cpp')
-rw-r--r-- | intern/cycles/kernel/osl/bssrdf.cpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/bssrdf.cpp b/intern/cycles/kernel/osl/bssrdf.cpp new file mode 100644 index 00000000000..66d7818e677 --- /dev/null +++ b/intern/cycles/kernel/osl/bssrdf.cpp @@ -0,0 +1,105 @@ +/* + * Adapted from Open Shading Language with this license: + * + * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al. + * All Rights Reserved. + * + * Modifications Copyright 2011, Blender Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Sony Pictures Imageworks nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <OpenImageIO/fmath.h> + +#include <OSL/genclosure.h> + +#include "osl_closures.h" + +CCL_NAMESPACE_BEGIN + +using namespace OSL; + +class BSSRDFCubicClosure : public BSSRDFClosure { +public: + Color3 m_radius; + Color3 m_scale; + float m_max_radius; + + template <typename T> + static inline T pow3 (const T &x) { return x * x * x; } + + template <typename T> + static inline T pow5 (const T &x) { T x2 = x * x; return x2 * x2 * x; } + + BSSRDFCubicClosure() { } + + void setup() + { + // pre-compute some terms + m_max_radius = 0; + for (int i = 0; i < 3; i++) { + m_scale[i] = m_radius[i] > 0 ? 4 / pow5 (m_radius[i]) : 0; + m_max_radius = std::max (m_max_radius, m_radius[i]); + } + } + + bool mergeable (const ClosurePrimitive *other) const { + const BSSRDFCubicClosure *comp = (const BSSRDFCubicClosure *)other; + return m_radius == comp->m_radius && BSSRDFClosure::mergeable(other); + } + + size_t memsize () const { return sizeof(*this); } + + const char *name () const { return "bssrdf_cubic"; } + + void print_on (std::ostream &out) const + { + out << name() << " ((" << m_radius[0] << ", " << m_radius[1] << ", " << m_radius[2] << "), (" + << m_scale[0] << ", " << m_scale[1] << ", " << m_scale[2] << "))"; + } + + Color3 eval (float r) const + { + return Color3 ((r < m_radius.x) ? pow3 (m_radius.x - r) * m_scale.x : 0, + (r < m_radius.y) ? pow3 (m_radius.y - r) * m_scale.y : 0, + (r < m_radius.z) ? pow3 (m_radius.z - r) * m_scale.z : 0); + } + + float max_radius() const + { + return m_max_radius; + } +}; + + + +ClosureParam closure_bssrdf_cubic_params[] = { + CLOSURE_COLOR_PARAM (BSSRDFCubicClosure, m_radius), + CLOSURE_STRING_KEYPARAM ("label"), + CLOSURE_FINISH_PARAM(BSSRDFCubicClosure) }; + +CLOSURE_PREPARE(closure_bssrdf_cubic_prepare, BSSRDFCubicClosure) + +CCL_NAMESPACE_END + |