source: trunk/tests/planet_test/nv_planet_test.cc

#include <nv/gfx/keyframed_mesh.hh>
#include <nv/gl/gl_device.hh>
#include <nv/sdl/sdl_window_manager.hh>
#include <nv/gfx/image.hh>
#include <nv/gfx/debug_draw.hh>
#include <nv/interface/context.hh>
#include <nv/interface/window.hh>
#include <nv/core/profiler.hh>
#include <nv/core/logging.hh>
#include <nv/core/logger.hh>
#include <nv/core/math.hh>
#include <nv/core/time.hh>
#include <nv/core/string.hh>
#include <glm/gtx/rotate_vector.hpp>

class application
{
public:
        application();
        bool initialize();
        bool run();
        ~application();
protected:
        nv::mesh_data* generate_box();
        nv::mesh_data* generate_subdiv_sphere( int levels );
        nv::window_manager* m_wm;
        nv::device*      m_device;
        nv::window*      m_window;
        nv::context*     m_context;
        nv::debug_data*  m_debug_data;
        nv::texture      m_diffuse;
        nv::program      m_program;
        nv::mesh_data*   m_data;
        nv::vertex_array m_va;

        nv::clear_state   m_clear_state;
        nv::render_state  m_render_state;
        nv::scene_state   m_scene_state;
};

struct vertex
{
        nv::vec3 position;
};

nv::mesh_data* generate_subdiv_sphere( int levels )
{


        nv::mesh_raw_channel* vchannel = nv::mesh_raw_channel::create<vertex>( 8 );
        nv::mesh_raw_channel* ichannel = nv::mesh_raw_channel::create_index( nv::USHORT, 6 * 6 );
        vertex*     vtx = (vertex*)vchannel->data;
        nv::uint16* idx = (nv::uint16*)ichannel->data;

        nv::mesh_data* result = new nv::mesh_data;
        result->add_channel( vchannel );
        result->add_channel( ichannel );
        return result;

}

nv::mesh_data* application::generate_box()
{
        nv::mesh_raw_channel* vchannel = nv::mesh_raw_channel::create<vertex>( 8 );
        nv::mesh_raw_channel* ichannel = nv::mesh_raw_channel::create_index( nv::USHORT, 6 * 6 );
        vertex*     vtx = (vertex*)vchannel->data;
        nv::uint16* idx = (nv::uint16*)ichannel->data;
        
        vtx[0].position = nv::vec3( 1.0f, 1.0f, 1.0f );
        vtx[1].position = nv::vec3( 1.0f, 1.0f,-1.0f );
        vtx[2].position = nv::vec3(-1.0f, 1.0f,-1.0f );
        vtx[3].position = nv::vec3(-1.0f, 1.0f, 1.0f );
        vtx[4].position = nv::vec3( 1.0f,-1.0f, 1.0f );
        vtx[5].position = nv::vec3( 1.0f,-1.0f,-1.0f );
        vtx[6].position = nv::vec3(-1.0f,-1.0f,-1.0f );
        vtx[7].position = nv::vec3(-1.0f,-1.0f, 1.0f );

        auto square = [&]( nv::uint16 i, nv::uint16 a, nv::uint16 b, nv::uint16 c, nv::uint16 d ) 
        {
                idx[i+0] = a; 
                idx[i+1] = b; 
                idx[i+2] = c; 
                
                idx[i+3] = c; 
                idx[i+4] = d; 
                idx[i+5] = a; 
        };

        square( 0, 0, 1, 2, 3 );
        square( 6, 1, 0, 4, 5 );
        square(12, 2, 1, 5, 6 );
        square(18, 3, 2, 6, 7 );
        square(24, 0, 3, 7, 4 );
        square(30, 7, 6, 5, 4 );

        nv::mesh_data* result = new nv::mesh_data;
        result->add_channel( vchannel );
        result->add_channel( ichannel );
        return result;
}


application::application()
{
        NV_PROFILE( "app_construct" );
        m_wm      = new nv::sdl::window_manager;
        m_device  = new nv::gl_device();
        m_window  = m_wm->create_window( m_device, 1024, 800, false );
        m_context = m_window->get_context();

//      nv::sampler sampler( nv::sampler::LINEAR, nv::sampler::REPEAT );
//      nv::image_data* data = m_device->create_image_data( "data/manc.png" );
//      m_diffuse  = m_device->create_texture( data, sampler );
//      delete data;

        m_clear_state.buffers = nv::clear_state::COLOR_AND_DEPTH_BUFFER;
        m_clear_state.color   = nv::vec4(0.2f,0.2f,0.2f,1.0f);
        m_render_state.depth_test.enabled = true;
        m_render_state.culling.enabled    = true;
        m_render_state.blending.enabled   = false;
        m_render_state.blending.src_rgb_factor   = nv::blending::SRC_ALPHA;
        m_render_state.blending.dst_rgb_factor   = nv::blending::ONE_MINUS_SRC_ALPHA;
        m_render_state.blending.src_alpha_factor = nv::blending::SRC_ALPHA;
        m_render_state.blending.dst_alpha_factor = nv::blending::ONE_MINUS_SRC_ALPHA;

        m_debug_data = new nv::debug_data( m_context );
        m_debug_data->push_aabox( nv::vec3( 1.0f, 1.0f, 1.0f ), nv::vec3(-1.0f, -1.0f,-1.0f ), nv::vec3( 1.0f, 0.0f, 0.0f ) );
        m_debug_data->update();
}

bool application::initialize()
{
        NV_PROFILE( "app_initialize" );
        m_program = m_device->create_program( nv::slurp( "planet.vert" ), nv::slurp( "planet.frag" ) );
        m_data = generate_box();
        m_va   = m_context->create_vertex_array( m_data, nv::STATIC_DRAW );
        return true;
}

bool application::run()
{
        nv::profiler::pointer()->log_report(); 
        NV_PROFILE( "app_run" );
        int keypress = 0;

        nv::uint32 ticks   = m_wm->get_ticks();
        nv::uint32 last_ticks;
        nv::fps_counter_class< nv::system_us_timer > fps_counter;

        nv::uint16 count = 0;
        while(!keypress) 
        {
                last_ticks = ticks;
                ticks      = m_wm->get_ticks();
                nv::uint32 elapsed = ticks - last_ticks;
                m_context->clear( m_clear_state );
                glm::vec3 eye = glm::rotate( glm::vec3( 3.0f, 0.0f, 0.0f ), (ticks / 20.f), glm::vec3( 0.0,1.0,0.0 ) );
//              eye = glm::vec3( 3.0f, 0.0f, 0.0f );
                m_scene_state.set_model( nv::mat4(1.0f) );
                m_scene_state.get_camera().set_lookat(eye, glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0, 1.0, 0.0));
                float ratio = (float)m_window->get_width() / (float)m_window->get_height();
                m_scene_state.get_camera().set_perspective(60.0f, ratio, 0.1f, 1000.0f);

//              m_context->bind( m_diffuse, nv::TEX_DIFFUSE );
                m_device->set_opt_uniform( m_program, "center", glm::vec3(0.0,0.0,0.0) );
                m_device->set_opt_uniform( m_program, "radius", 1.0f );
                m_device->set_opt_uniform( m_program, "light_position", glm::vec3(120.0, 120.0, 0) );
                m_device->set_opt_uniform( m_program, "light_diffuse",  glm::vec4(0.5,0.5,0.5,1.0) );
                m_device->set_opt_uniform( m_program, "light_specular", glm::vec4(1.0,1.0,1.0,1.0) );
                m_render_state.culling.order    = nv::culling::CW;
                m_context->draw( nv::TRIANGLES, m_render_state, m_scene_state, m_program, m_va, 6*6 );
                m_render_state.culling.order    = nv::culling::CCW;

                m_context->draw( nv::LINES, m_render_state, m_scene_state, m_debug_data->get_program(), m_debug_data->get_vertex_array(), m_debug_data->get_count() );

                m_window->swap_buffers();

                nv::io_event event;
                while(m_window->poll_event(event)) 
                {      
                        switch (event.type) 
                        {
                        case nv::EV_QUIT:
                                keypress = 1;
                                break;
                        case nv::EV_KEY:
                                if (event.key.pressed)
                                {
                                        switch (event.key.code) 
                                        {
                                        case nv::KEY_ESCAPE : keypress = 1; break;
                                        case nv::KEY_F1 : nv::profiler::pointer()->log_report(); break;
                                        default: break;
                                        }
                                }
                                break;
                        default: break;
                        }
                }

                fps_counter.tick();
                if ( count % 120 == 0 )
                {
                        m_window->set_title( "Nova Engine - " + nv::to_string( (nv::uint32)fps_counter.fps() ) );
                }
                count++;
        }
        return true;
}

application::~application()
{
        m_context->release( m_va );
        m_device->release( m_program );
        m_device->release( m_diffuse );

        delete m_window;
        delete m_device;
}


int main(int, char* [])
{
        nv::logger log(nv::LOG_TRACE);
        log.add_sink( new nv::log_file_sink("log.txt"), nv::LOG_TRACE );
        log.add_sink( new nv::log_console_sink(), nv::LOG_TRACE );
        
        NV_LOG( nv::LOG_NOTICE, "Logging started" );
        application app;
        if ( app.initialize() )
        {
                app.run();
        }
        NV_LOG( nv::LOG_NOTICE, "Logging stopped" );

        return 0;
}