💿🐜 Antkeeper source code
https://antkeeper.com
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268 lines
7.8 KiB
268 lines
7.8 KiB
/*
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* Copyright (C) 2021 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "game/states/loading.hpp"
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#include "game/states/play.hpp"
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#include "game/states/splash.hpp"
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#include "entity/components/celestial-body.hpp"
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#include "entity/components/orbit.hpp"
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#include "entity/components/blackbody.hpp"
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#include "entity/components/terrain.hpp"
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#include "entity/components/atmosphere.hpp"
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#include "entity/components/transform.hpp"
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#include "entity/systems/astronomy.hpp"
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#include "entity/systems/orbit.hpp"
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#include "scene/directional-light.hpp"
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#include "scene/ambient-light.hpp"
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#include "resources/resource-manager.hpp"
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#include "application.hpp"
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#include "renderer/passes/shadow-map-pass.hpp"
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namespace game {
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namespace state {
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namespace loading {
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/// Creates the universe and solar system.
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static void cosmogenesis(game::context* ctx);
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/// Creates a sun.
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static void heliogenesis(game::context* ctx);
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/// Creates a planet.
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static void planetogenesis(game::context* ctx);
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/// Creates a moon.
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static void selenogenesis(game::context* ctx);
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void enter(game::context* ctx)
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{
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// Create universe
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ctx->logger->push_task("Creating the universe");
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try
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{
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cosmogenesis(ctx);
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}
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catch (...)
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{
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ctx->logger->pop_task(EXIT_FAILURE);
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throw;
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}
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ctx->logger->pop_task(EXIT_SUCCESS);
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// Determine next game state
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application::state next_state;
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if (ctx->option_quick_start.has_value())
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{
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next_state.name = "play";
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next_state.enter = std::bind(game::state::play::enter, ctx);
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next_state.exit = std::bind(game::state::play::exit, ctx);
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}
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else
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{
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next_state.name = "splash";
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next_state.enter = std::bind(game::state::splash::enter, ctx);
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next_state.exit = std::bind(game::state::splash::exit, ctx);
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}
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// Queue next game state
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ctx->app->queue_state(next_state);
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}
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void exit(game::context* ctx)
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{}
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void cosmogenesis(game::context* ctx)
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{
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// Init time
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const double time = 0.0;
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ctx->astronomy_system->set_universal_time(time);
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ctx->orbit_system->set_universal_time(time);
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// Create sun
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ctx->logger->push_task("Creating the sun");
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try
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{
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heliogenesis(ctx);
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}
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catch (...)
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{
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ctx->logger->pop_task(EXIT_FAILURE);
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throw;
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}
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ctx->logger->pop_task(EXIT_SUCCESS);
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// Create planet
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ctx->logger->push_task("Creating the planet");
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try
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{
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planetogenesis(ctx);
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}
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catch (...)
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{
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ctx->logger->pop_task(EXIT_FAILURE);
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throw;
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}
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ctx->logger->pop_task(EXIT_SUCCESS);
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// Create moon
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ctx->logger->push_task("Creating the moon");
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try
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{
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selenogenesis(ctx);
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}
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catch (...)
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{
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ctx->logger->pop_task(EXIT_FAILURE);
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throw;
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}
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ctx->logger->pop_task(EXIT_SUCCESS);
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}
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void heliogenesis(game::context* ctx)
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{
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// Create solar entity
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auto sun_eid = ctx->entity_registry->create();
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// Name solar entity
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ctx->named_entities["sun"] = sun_eid;
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// Assign solar celestial body component
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entity::component::celestial_body body;
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body.radius = 6.957e+8;
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body.axial_tilt = math::radians(0.0);
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body.axial_rotation = math::radians(0.0);
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body.angular_frequency = math::radians(0.0);
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ctx->entity_registry->assign<entity::component::celestial_body>(sun_eid, body);
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// Assign solar orbit component
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entity::component::orbit orbit;
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orbit.elements.a = 0.0;
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orbit.elements.e = 0.0;
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orbit.elements.i = math::radians(0.0);
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orbit.elements.raan = math::radians(0.0);
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orbit.elements.w = math::radians(0.0);
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orbit.elements.ta = math::radians(0.0);
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ctx->entity_registry->assign<entity::component::orbit>(sun_eid, orbit);
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// Assign solar blackbody component
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entity::component::blackbody blackbody;
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blackbody.temperature = 5778.0;
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ctx->entity_registry->assign<entity::component::blackbody>(sun_eid, blackbody);
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// Assign solar transform component
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entity::component::transform transform;
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transform.local = math::identity_transform<float>;
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transform.warp = true;
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ctx->entity_registry->assign<entity::component::transform>(sun_eid, transform);
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// Create direct sun light scene object
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scene::directional_light* sun_direct = new scene::directional_light();
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// Create ambient sun light scene object
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scene::ambient_light* sun_ambient = new scene::ambient_light();
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sun_ambient->set_color({1, 1, 1});
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sun_ambient->set_intensity(0.0f);
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sun_ambient->update_tweens();
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// Add sun light scene objects to overworld scene
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ctx->overworld_scene->add_object(sun_direct);
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ctx->overworld_scene->add_object(sun_ambient);
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// Pass direct sun light scene object to shadow map pass and astronomy system
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ctx->overworld_shadow_map_pass->set_light(sun_direct);
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ctx->astronomy_system->set_sun_light(sun_direct);
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}
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void planetogenesis(game::context* ctx)
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{
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// Create planetary entity
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auto planet_eid = ctx->entity_registry->create();
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// Name planetary entity
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ctx->named_entities["planet"] = planet_eid;
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// Assign planetary celestial body component
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entity::component::celestial_body body;
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body.radius = 6.3781e6;
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body.axial_tilt = math::radians(23.4393);
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body.axial_rotation = math::radians(280.46061837504);
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body.angular_frequency = math::radians(360.9856122880876128);
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ctx->entity_registry->assign<entity::component::celestial_body>(planet_eid, body);
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// Assign planetary orbit component
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entity::component::orbit orbit;
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orbit.elements.a = 1.496e+11;
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orbit.elements.e = 0.01671123;
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orbit.elements.i = math::radians(-0.00001531);
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orbit.elements.raan = math::radians(0.0);
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const double longitude_periapsis = math::radians(102.93768193);
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orbit.elements.w = longitude_periapsis - orbit.elements.raan;
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orbit.elements.ta = math::radians(100.46457166) - longitude_periapsis;
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ctx->entity_registry->assign<entity::component::orbit>(planet_eid, orbit);
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// Assign planetary terrain component
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entity::component::terrain terrain;
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terrain.elevation = [](double, double) -> double
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{
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//return math::random<double>(0.0, 1.0);
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return 0.0;
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};
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terrain.max_lod = 18;
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terrain.patch_material = ctx->resource_manager->load<material>("desert-terrain.mtl");
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ctx->entity_registry->assign<entity::component::terrain>(planet_eid, terrain);
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// Assign planetary atmosphere component
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entity::component::atmosphere atmosphere;
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atmosphere.exosphere_altitude = 65e3;
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atmosphere.index_of_refraction = 1.000293;
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atmosphere.rayleigh_density = 2.545e25;
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atmosphere.rayleigh_scale_height = 8000.0;
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atmosphere.mie_density = 14.8875;
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atmosphere.mie_scale_height = 1200.0;
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atmosphere.mie_anisotropy = 0.8;
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ctx->entity_registry->assign<entity::component::atmosphere>(planet_eid, atmosphere);
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// Assign planetary transform component
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entity::component::transform transform;
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transform.local = math::identity_transform<float>;
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transform.warp = true;
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ctx->entity_registry->assign<entity::component::transform>(planet_eid, transform);
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// Pass planet to astronomy system as reference body
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ctx->astronomy_system->set_reference_body(planet_eid);
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// Load sky model
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ctx->overworld_sky_pass->set_sky_model(ctx->resource_manager->load<model>("sky-dome.mdl"));
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}
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void selenogenesis(game::context* ctx)
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{
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// Create lunar entity
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auto moon_eid = ctx->entity_registry->create();
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// Name lunar entity
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ctx->named_entities["moon"] = moon_eid;
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// Pass moon model to sky pass
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ctx->overworld_sky_pass->set_moon_model(ctx->resource_manager->load<model>("moon.mdl"));
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}
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} // namespace loading
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} // namespace state
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} // namespace game
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