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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
CCL_NAMESPACE_BEGIN
/* note: the interfaces here are just as an example, need to figure
* out the right functions and parameters to use */
/* ISOTROPIC VOLUME CLOSURE */
__device int volume_isotropic_setup(ShaderClosure *sc, float density)
{
sc->type = CLOSURE_VOLUME_ISOTROPIC_ID;
sc->data0 = density;
return SD_VOLUME;
}
__device float3 volume_isotropic_eval_phase(const ShaderClosure *sc, const float3 omega_in, const float3 omega_out)
{
return make_float3(1.0f, 1.0f, 1.0f);
}
/* TRANSPARENT VOLUME CLOSURE */
__device int volume_transparent_setup(ShaderClosure *sc, float density)
{
sc->type = CLOSURE_VOLUME_TRANSPARENT_ID;
sc->data0 = density;
return SD_VOLUME;
}
__device float3 volume_transparent_eval_phase(const ShaderClosure *sc, const float3 omega_in, const float3 omega_out)
{
return make_float3(1.0f, 1.0f, 1.0f);
}
/* VOLUME CLOSURE */
__device float3 volume_eval_phase(const ShaderClosure *sc, const float3 omega_in, const float3 omega_out)
{
float3 eval;
switch(sc->type) {
case CLOSURE_VOLUME_ISOTROPIC_ID:
eval = volume_isotropic_eval_phase(sc, omega_in, omega_out);
break;
case CLOSURE_VOLUME_TRANSPARENT_ID:
eval = volume_transparent_eval_phase(sc, omega_in, omega_out);
break;
default:
eval = make_float3(0.0f, 0.0f, 0.0f);
break;
}
return eval;
}
CCL_NAMESPACE_END
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