isaac_controllers.hpp

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/* This file is part of ISAAC.
 *
 * ISAAC is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * ISAAC 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with ISAAC.  If not, see <www.gnu.org/licenses/>. */

#pragma once

namespace isaac
{

struct DefaultController
{
    static const int pass_count = 1;
    DefaultController() {}
    ~DefaultController() {}
    inline bool updateProjection( IceTDouble * const projection, const isaac_size2 & framebuffer_size, json_t * const message, const bool first = false)
    {
        if (first)
            setPerspective( projection, 45.0f, (isaac_float)framebuffer_size.x/(isaac_float)framebuffer_size.y,ISAAC_Z_NEAR, ISAAC_Z_FAR);
        return false;
    }
    inline void sendFeedback( json_t * const json_root, bool force = false ) {}
};

struct StereoController
{
    static const int pass_count = 2;
    StereoController() :
        eye_distance(0.06f),
        send_stereo(true)
    {}
    ~StereoController() {}
    inline bool updateProjection( IceTDouble * const projection, const isaac_size2 & framebuffer_size, json_t * const message, const bool first = false)
    {
        if ( json_t* js = json_object_get(message, "eye distance") )
        {
            send_stereo = true;
            eye_distance = json_number_value( js );
            json_object_del( message, "eye distance" );
        }
        if (first || send_stereo)
        {
            spSetPerspectiveStereoscopic( &(projection[ 0]), 45.0f, (isaac_float)framebuffer_size.x/(isaac_float)framebuffer_size.y,ISAAC_Z_NEAR, ISAAC_Z_FAR, 5.0f,  eye_distance);
            spSetPerspectiveStereoscopic( &(projection[16]), 45.0f, (isaac_float)framebuffer_size.x/(isaac_float)framebuffer_size.y,ISAAC_Z_NEAR, ISAAC_Z_FAR, 5.0f, -eye_distance);
        }
        return send_stereo;
    }
    inline void sendFeedback( json_t * const json_root, bool force = false )
    {
        if (send_stereo || force)
        {
            json_object_set_new( json_root, "eye distance", json_real( eye_distance ) );
            send_stereo = false;
        }
    }
    float eye_distance;
    bool send_stereo;
};

} //namespace isaac;