source: trunk/tests/render_test/rl.cc @ 71

#include <nv/lib/sdl12.hh>
#include <nv/lib/sdl_image.hh>
#include <nv/interface/vertex_buffer.hh>
#include <nv/gl/gl_device.hh>
#include <nv/gl/image.hh>
#include <nv/interface/context.hh>
#include <nv/interface/window.hh>
#include <nv/interface/program.hh>
#include <nv/interface/texture2d.hh>
#include <nv/logging.hh>
#include <nv/logger.hh>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <nv/string.hh>
#include <nv/types.hh>
#include <nv/interface/mesh.hh>

const nv::uint16 size_x  = 16;
const nv::uint16 size_y  = 16;
const nv::uint16 size_xy = size_x * size_y;

nv::uint8 height[size_xy] = 
{
        4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  6,  6,  6,  6,  6,  6,  6,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  6,  6,  6,  6,  6,  6,  6,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  6,  6,  6,  6,  6,  6,  6,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  5,  5,  5,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  5,  5,  5,  4,  2,  2,  2,  2,  2,  2,  4,  4,  4,
        4,  4,  4,  5,  5,  5,  4,  2,  2,  2,  2,  2,  2,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  2,  2,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  2,  2,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  2,  2,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  4,  4,  4,  4,  4,  4,
        4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  4,  4,  4,  4,  4,  4,
};

nv::uint8 map[size_xy] = 
{
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  6,  6,  6,  2,  2,  2,
        3,  2,  2,  2,  2,  2,  2,  6,  6,  6,  6,  6,  6,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  6,  6,  6,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  6,  6,  6,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  6,  6,  6,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  2,  2,  2,  2,  2,  2,
        2,  2,  2,  2,  2,  2,  2,  6,  6,  6,  2,  2,  2,  2,  2,  2,
};

class application
{
public:
        application();
        bool initialize();
        bool init_program( const std::string& name, nv::program*& p, nv::vertex_array*& va, nv::mesh* m );
        bool run();
        ~application();
protected:
        nv::device* m_device;
        nv::window* m_window;
        nv::texture2d* m_texture;
        nv::clear_state m_clear_state;
        nv::render_state m_render_state;

        nv::program* m_char_program;
        nv::program* m_box_program;
        nv::vertex_array* m_char_va;
        nv::vertex_array* m_box_va;
        unsigned int m_count;
};

application::application()
{
        m_device = new nv::gl_device();
        m_window = m_device->create_window( 800, 600 );
        
        nv::load_sdl_image_library();
        SDL_Surface* texture = IMG_Load( "spritesheet.png" );
        nv::image sprites( glm::ivec2( texture->w, texture->h ), 4, (nv::uint8*)texture->pixels );
        nv::sampler sampler( nv::sampler::NEAREST, nv::sampler::REPEAT );
        m_texture = m_device->create_texture2d( sprites.get_size(), nv::RGBA, nv::UBYTE, sampler, (void*)sprites.get_data() );

        m_clear_state.buffers = nv::clear_state::COLOR_AND_DEPTH_BUFFER;
        m_render_state.depth_test.enabled = true;
        m_render_state.blending.enabled   = true;
        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;
}

bool application::initialize()
{
        { // CHARACTER
                nv::mesh cmesh;
                nv::vertex_attribute<nv::i8vec3>::list& vtx = cmesh.add_attribute<nv::i8vec3>("coords")->get();
                nv::vertex_attribute<nv::i8vec3>::list& mat = cmesh.add_attribute<nv::i8vec3>("material")->get();
                int m = 16;     int x = 0; int y = 0; int h = 0;
                vtx.emplace_back( x,   h, y );  
                vtx.emplace_back( x,   h, y+1 );
                vtx.emplace_back( x+1, h, y+1 );
                vtx.emplace_back( x+1, h, y+1 );
                vtx.emplace_back( x+1, h, y );  
                vtx.emplace_back( x,   h, y );  
                mat.insert( mat.end(), 6, nv::i8vec3( m, 1, 0 ) );

                if (!init_program( "char", m_char_program, m_char_va, &cmesh ) ) return false;
        }

        { // WORLD
                nv::mesh wmesh;
                nv::vertex_attribute<nv::i8vec3>::list& vtx = wmesh.add_attribute<nv::i8vec3>("coords")->get();
                nv::vertex_attribute<nv::i8vec3>::list& mat = wmesh.add_attribute<nv::i8vec3>("material")->get();

                for (int i = 0; i < size_x * size_y; ++i )
                {
                        int x = i % size_x;
                        int y = i / size_x;

                        vtx.emplace_back( x,   height[i], y   ); 
                        vtx.emplace_back( x,   height[i], y+1 ); 
                        vtx.emplace_back( x+1, height[i], y+1 ); 
                        vtx.emplace_back( x+1, height[i], y+1 ); 
                        vtx.emplace_back( x+1, height[i], y );   
                        vtx.emplace_back( x,   height[i], y );   
                        mat.insert( mat.end(), 6, nv::i8vec3( map[i], 2, 0 ) );

                        if (i > 0 && height[i-1] != height[i])
                        {
                                short dir   = height[i-1] > height[i] ? -1 : 1;
                                nv::uint8 m = 1;
                                for ( int h = height[i-1]; h != height[i]; h = h + dir )
                                {
                                        m_count += 6;
                                        vtx.emplace_back( x, h,     y );   
                                        vtx.emplace_back( x, h,     y+1 ); 
                                        vtx.emplace_back( x, h+dir, y+1 ); 
                                        vtx.emplace_back( x, h+dir, y+1 ); 
                                        vtx.emplace_back( x, h+dir, y );   
                                        vtx.emplace_back( x, h,     y );   
                                        mat.insert( mat.end(), 6, nv::i8vec3( m, -dir, 0 ) );
                                }
                        }

                        if (i >= size_x && height[i-size_x] != height[i])
                        {
                                short dir   = height[i-size_x] > height[i] ? -1 : 1;
                                nv::uint8 m = 1;
                                for ( int h = height[i-size_x]; h != height[i]; h = h + dir )
                                {
                                        vtx.emplace_back( x,   h,     y ); 
                                        vtx.emplace_back( x,   h+dir, y ); 
                                        vtx.emplace_back( x+1, h+dir, y ); 

                                        vtx.emplace_back( x+1, h+dir, y ); 
                                        vtx.emplace_back( x+1, h,     y ); 
                                        vtx.emplace_back( x,   h,     y ); 
                                        mat.insert( mat.end(), 6, nv::i8vec3( m, -3*dir, 0 ) );
                                }
                        }

                }

                m_count = vtx.size();
                if (!init_program( "box",  m_box_program, m_box_va, &wmesh ) ) return false;
        }

        return true;
}

bool application::init_program( const std::string& name, nv::program*& p, nv::vertex_array*& va, nv::mesh* m )
{
        p  = m_device->create_program( nv::slurp( name+".vert" ), nv::slurp( name+".frag" ) );
        va = m_device->create_vertex_array();
        const nv::mesh::map& attrs = m->get_attributes();

        for ( auto attr : attrs )
        {
                nv::vertex_buffer* vb = m_device->create_vertex_buffer( nv::STATIC_DRAW, attr.second->get_size(), attr.second->get_data() );
                va->add_vertex_buffer( p->get_attribute( attr.first )->get_location(), vb, attr.second->get_base_type(), attr.second->get_components() );
        }
        return true;
}

bool application::run()
{
        int keypress = 0;

        glm::vec3 move( 0, 0, 0 );

        while(!keypress) 
        {
                m_window->get_context()->clear( m_clear_state );

                glm::mat4 model = glm::translate(glm::mat4(1.0f), glm::vec3(-8.5, 0.0, -8.0));
                glm::mat4 view  = glm::lookAt(glm::vec3(0.0, 20.0, 5.0) + move, glm::vec3(0.0, 4.0, 0.0) + move, glm::vec3(0.0, 1.0, 0.0));
                glm::mat4 projection = glm::perspective(25.0f, 1.0f*800.0f/600.0f, 0.1f, 100.0f);
                glm::mat4 mv         = view * model;

                m_texture->bind( 0 );
                m_box_program->set_uniform( "matrix_mvp", projection * mv );
                m_box_program->set_uniform( "light", glm::vec3(8.5, 4.5, 6.5) + move );
                m_box_program->set_uniform( "tex", 0 );
                m_window->get_context()->draw( nv::TRIANGLES, m_render_state, m_box_program, m_box_va, m_count );

                m_char_program->set_uniform( "matrix_mvp", projection * mv );
                m_char_program->set_uniform( "pos", move + glm::vec3( 8, 4.1, 6 ) );
                m_char_program->set_uniform( "tex", 0 );
                m_window->get_context()->draw( nv::TRIANGLES, m_render_state, m_char_program, m_char_va, 6 );

                SDL_GL_SwapBuffers();
                SDL_Event event;
                while(SDL_PollEvent(&event)) 
                {      
                        switch (event.type) 
                        {
                        case SDL_QUIT:
                                keypress = 1;
                                break;
                        case SDL_KEYDOWN:
                                switch (event.key.keysym.sym) 
                                {
                                case SDLK_ESCAPE: keypress = 1; break;
                                case SDLK_LEFT: move.x = move.x - 1.0f; break;
                                case SDLK_RIGHT: move.x = move.x + 1.0f; break;
                                case SDLK_UP: move.z = move.z - 1.0f; break;
                                case SDLK_DOWN: move.z = move.z + 1.0f; break;
                                }
                                break;
                        }
                }
        }
        return true;
}

application::~application()
{
        delete m_char_program;
        delete m_box_program;
        delete m_char_va;
        delete m_box_va;
        delete m_texture;
        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;
}