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/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov, Jan Diederich, Tod Liverseed,
* Nathan Letwory
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <string>
#include "COLLADASWColor.h"
#include "COLLADASWLight.h"
#include "DNA_lamp_types.h"
#include "BLI_math.h"
#include "LightExporter.h"
#include "collada_internal.h"
template<class Functor>
void forEachLampObjectInScene(Scene *sce, Functor &f)
{
Base *base= (Base*) sce->base.first;
while(base) {
Object *ob = base->object;
if (ob->type == OB_LAMP && ob->data) {
f(ob);
}
base= base->next;
}
}
LightsExporter::LightsExporter(COLLADASW::StreamWriter *sw): COLLADASW::LibraryLights(sw){}
void LightsExporter::exportLights(Scene *sce)
{
openLibrary();
forEachLampObjectInScene(sce, *this);
closeLibrary();
}
void LightsExporter::operator()(Object *ob)
{
Lamp *la = (Lamp*)ob->data;
std::string la_id(get_light_id(ob));
std::string la_name(id_name(la));
COLLADASW::Color col(la->r, la->g, la->b);
float att1, att2;
float e, d, constatt, linatt, quadatt;
att1 = att2 = 0.0f;
if(la->falloff_type==LA_FALLOFF_INVLINEAR) {
att1 = 1.0f;
att2 = 0.0f;
}
else if(la->falloff_type==LA_FALLOFF_INVSQUARE) {
att1 = 0.0f;
att2 = 1.0f;
}
else if(la->falloff_type==LA_FALLOFF_SLIDERS) {
att1 = la->att1;
att2 = la->att2;
}
e = la->energy;
d = la->dist;
constatt = linatt = quadatt = MAXFLOAT;
if(e > 0.0f) {
constatt = 1.0f/e;
linatt = att1/(d*e);
quadatt = att2/(d*d*(e*2));
}
// sun
if (la->type == LA_SUN) {
COLLADASW::DirectionalLight cla(mSW, la_id, la_name, e);
cla.setColor(col);
cla.setConstantAttenuation(constatt);
addLight(cla);
}
// hemi
else if (la->type == LA_HEMI) {
COLLADASW::AmbientLight cla(mSW, la_id, la_name, e);
cla.setColor(col);
cla.setConstantAttenuation(constatt);
addLight(cla);
}
// spot
else if (la->type == LA_SPOT) {
COLLADASW::SpotLight cla(mSW, la_id, la_name, e);
cla.setColor(col);
cla.setFallOffAngle(la->spotsize);
cla.setFallOffExponent(la->spotblend);
cla.setConstantAttenuation(constatt);
cla.setLinearAttenuation(linatt);
cla.setQuadraticAttenuation(quadatt);
addLight(cla);
}
// lamp
else if (la->type == LA_LOCAL) {
COLLADASW::PointLight cla(mSW, la_id, la_name, e);
cla.setColor(col);
cla.setConstantAttenuation(constatt);
cla.setLinearAttenuation(linatt);
cla.setQuadraticAttenuation(quadatt);
addLight(cla);
}
// area lamp is not supported
// it will be exported as a local lamp
else {
COLLADASW::PointLight cla(mSW, la_id, la_name, e);
cla.setColor(col);
cla.setConstantAttenuation(constatt);
cla.setLinearAttenuation(linatt);
cla.setQuadraticAttenuation(quadatt);
addLight(cla);
}
}
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