LightExporter.cpp

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/*
 * $Id: LightExporter.cpp 38079 2011-07-04 08:59:28Z jesterking $
 *
 * ***** 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 "BLI_math.h"

#include "LightExporter.h"
#include "collada_internal.h"

template<class Functor>
void forEachLampObjectInScene(Scene *sce, Functor &f, bool export_selected)
{
        Base *base= (Base*) sce->base.first;
        while(base) {
                Object *ob = base->object;
                        
                if (ob->type == OB_LAMP && ob->data
                        && !(export_selected && !(ob->flag & SELECT))) {
                        f(ob);
                }
                base= base->next;
        }
}

LightsExporter::LightsExporter(COLLADASW::StreamWriter *sw): COLLADASW::LibraryLights(sw){}

void LightsExporter::exportLights(Scene *sce, bool export_selected)
{
        openLibrary();
        
        forEachLampObjectInScene(sce, *this, export_selected);
        
        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->energy, la->g * la->energy, la->b * la->energy);
        float d, constatt, linatt, quadatt;
        
        d = la->dist;
        
        constatt = 1.0f;
        
        if(la->falloff_type==LA_FALLOFF_INVLINEAR) {
                linatt = 1.0f / d;
                quadatt = 0.0f;
        }
        else {
                linatt = 0.0f;
                quadatt = 1.0f / (d * d);
        }
        
        // sun
        if (la->type == LA_SUN) {
                COLLADASW::DirectionalLight cla(mSW, la_id, la_name);
                cla.setColor(col);
                cla.setConstantAttenuation(constatt);
                exportBlenderProfile(cla, la);
                addLight(cla);
        }
        // hemi
        else if (la->type == LA_HEMI) {
                COLLADASW::AmbientLight cla(mSW, la_id, la_name);
                cla.setColor(col);
                cla.setConstantAttenuation(constatt);
                exportBlenderProfile(cla, la);
                addLight(cla);
        }
        // spot
        else if (la->type == LA_SPOT) {
                COLLADASW::SpotLight cla(mSW, la_id, la_name);
                cla.setColor(col);
                cla.setFallOffAngle(la->spotsize);
                cla.setFallOffExponent(la->spotblend);
                cla.setConstantAttenuation(constatt);
                cla.setLinearAttenuation(linatt);
                cla.setQuadraticAttenuation(quadatt);
                exportBlenderProfile(cla, la);
                addLight(cla);
        }
        // lamp
        else if (la->type == LA_LOCAL) {
                COLLADASW::PointLight cla(mSW, la_id, la_name);
                cla.setColor(col);
                cla.setConstantAttenuation(constatt);
                cla.setLinearAttenuation(linatt);
                cla.setQuadraticAttenuation(quadatt);
                exportBlenderProfile(cla, la);
                addLight(cla);
        }
        // area lamp is not supported
        // it will be exported as a local lamp
        else {
                COLLADASW::PointLight cla(mSW, la_id, la_name);
                cla.setColor(col);
                cla.setConstantAttenuation(constatt);
                cla.setLinearAttenuation(linatt);
                cla.setQuadraticAttenuation(quadatt);
                exportBlenderProfile(cla, la);
                addLight(cla);
        }
        
}

bool LightsExporter::exportBlenderProfile(COLLADASW::Light &cla, Lamp *la)
{
        cla.addExtraTechniqueParameter("blender", "type", la->type);
        cla.addExtraTechniqueParameter("blender", "flag", la->flag);
        cla.addExtraTechniqueParameter("blender", "mode", la->mode);
        cla.addExtraTechniqueParameter("blender", "gamma", la->k);
        cla.addExtraTechniqueParameter("blender", "red", la->r);
        cla.addExtraTechniqueParameter("blender", "green", la->g);
        cla.addExtraTechniqueParameter("blender", "blue", la->b);
        cla.addExtraTechniqueParameter("blender", "shadow_r", la->shdwr);
        cla.addExtraTechniqueParameter("blender", "shadow_g", la->shdwg);
        cla.addExtraTechniqueParameter("blender", "shadow_b", la->shdwb);
        cla.addExtraTechniqueParameter("blender", "energy", la->energy);
        cla.addExtraTechniqueParameter("blender", "dist", la->dist);
        cla.addExtraTechniqueParameter("blender", "spotsize", la->spotsize);
        cla.addExtraTechniqueParameter("blender", "spotblend", la->spotblend);
        cla.addExtraTechniqueParameter("blender", "halo_intensity", la->haint);
        cla.addExtraTechniqueParameter("blender", "att1", la->att1);
        cla.addExtraTechniqueParameter("blender", "att2", la->att2);
        // \todo figure out how we can have falloff curve supported here
        cla.addExtraTechniqueParameter("blender", "falloff_type", la->falloff_type);
        cla.addExtraTechniqueParameter("blender", "clipsta", la->clipsta);
        cla.addExtraTechniqueParameter("blender", "clipend", la->clipend);
        cla.addExtraTechniqueParameter("blender", "shadspotsize", la->shadspotsize);
        cla.addExtraTechniqueParameter("blender", "bias", la->bias);
        cla.addExtraTechniqueParameter("blender", "soft", la->soft);
        cla.addExtraTechniqueParameter("blender", "compressthresh", la->compressthresh);
        cla.addExtraTechniqueParameter("blender", "bufsize", la->bufsize);
        cla.addExtraTechniqueParameter("blender", "samp", la->samp);
        cla.addExtraTechniqueParameter("blender", "buffers", la->buffers);
        cla.addExtraTechniqueParameter("blender", "filtertype", la->filtertype);
        cla.addExtraTechniqueParameter("blender", "bufflag", la->bufflag);
        cla.addExtraTechniqueParameter("blender", "buftype", la->buftype);
        cla.addExtraTechniqueParameter("blender", "ray_samp", la->ray_samp);
        cla.addExtraTechniqueParameter("blender", "ray_sampy", la->ray_sampy);
        cla.addExtraTechniqueParameter("blender", "ray_sampz", la->ray_sampz);
        cla.addExtraTechniqueParameter("blender", "ray_samp_type", la->ray_samp_type);
        cla.addExtraTechniqueParameter("blender", "area_shape", la->area_shape);
        cla.addExtraTechniqueParameter("blender", "area_size", la->area_size);
        cla.addExtraTechniqueParameter("blender", "area_sizey", la->area_sizey);
        cla.addExtraTechniqueParameter("blender", "area_sizez", la->area_sizez);
        cla.addExtraTechniqueParameter("blender", "adapt_thresh", la->adapt_thresh);
        cla.addExtraTechniqueParameter("blender", "ray_samp_method", la->ray_samp_method);
        cla.addExtraTechniqueParameter("blender", "shadhalostep", la->shadhalostep);
        cla.addExtraTechniqueParameter("blender", "sun_effect_type", la->shadhalostep);
        cla.addExtraTechniqueParameter("blender", "skyblendtype", la->skyblendtype);
        cla.addExtraTechniqueParameter("blender", "horizon_brightness", la->horizon_brightness);
        cla.addExtraTechniqueParameter("blender", "spread", la->spread);
        cla.addExtraTechniqueParameter("blender", "sun_brightness", la->sun_brightness);
        cla.addExtraTechniqueParameter("blender", "sun_size", la->sun_size);
        cla.addExtraTechniqueParameter("blender", "backscattered_light", la->backscattered_light);
        cla.addExtraTechniqueParameter("blender", "sun_intensity", la->sun_intensity);
        cla.addExtraTechniqueParameter("blender", "atm_turbidity", la->atm_turbidity);
        cla.addExtraTechniqueParameter("blender", "atm_extinction_factor", la->atm_extinction_factor);
        cla.addExtraTechniqueParameter("blender", "atm_distance_factor", la->atm_distance_factor);
        cla.addExtraTechniqueParameter("blender", "skyblendfac", la->skyblendfac);
        cla.addExtraTechniqueParameter("blender", "sky_exposure", la->sky_exposure);
        cla.addExtraTechniqueParameter("blender", "sky_colorspace", la->sky_colorspace);
        
        return true;
}