- /*
- * Copyright (C) 2021 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code 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 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code 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 Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "render-system.hpp"
- #include "game/components/transform-component.hpp"
- #include "renderer/renderer.hpp"
-
- using namespace ecs;
-
- render_system::render_system(entt::registry& registry):
- entity_system(registry),
- renderer(nullptr)
- {
- registry.on_construct<model_component>().connect<&render_system::on_model_construct>(this);
- registry.on_replace<model_component>().connect<&render_system::on_model_replace>(this);
- registry.on_destroy<model_component>().connect<&render_system::on_model_destroy>(this);
- }
-
- void render_system::update(double t, double dt)
- {
- registry.view<transform_component, model_component>().each
- (
- [this](auto entity, auto& transform, auto& model)
- {
- model_instance* instance = model_instances[entity];
-
- instance->set_transform(transform.world);
-
- if (transform.warp)
- {
- instance->get_transform_tween().update();
- instance->update_tweens();
- transform.warp = false;
- }
- }
- );
- }
-
- void render_system::render(double alpha)
- {
- if (renderer)
- {
- for (const scene* scene: layers)
- {
- renderer->render(alpha, *scene);
- }
- }
- }
-
- void render_system::add_layer(::scene* layer)
- {
- layers.push_back(layer);
- }
-
- void render_system::remove_layers()
- {
- layers.clear();
- }
-
- void render_system::set_renderer(::renderer* renderer)
- {
- this->renderer = renderer;
- }
-
- model_instance* render_system::get_model_instance(entt::entity entity)
- {
- if (auto it = model_instances.find(entity); it != model_instances.end())
- return it->second;
- return nullptr;
- }
-
- void render_system::update_model_and_materials(entt::entity entity, model_component& model)
- {
- if (auto model_it = model_instances.find(entity); model_it != model_instances.end())
- {
- model_it->second->set_model(model.model);
- model_it->second->set_instanced((model.instance_count > 0), model.instance_count);
-
- for (auto material_it = model.materials.begin(); material_it != model.materials.end(); ++material_it)
- {
- model_it->second->set_material(material_it->first, material_it->second);
- }
-
- // Add model instance to its specified layers
- for (std::size_t i = 0; i < std::min<std::size_t>(layers.size(), (sizeof(model.layers) << 3)); ++i)
- {
- layers[i]->remove_object(model_it->second);
-
- if ((model.layers >> i) & 1)
- {
- layers[i]->add_object(model_it->second);
- }
- }
- }
- }
-
- void render_system::on_model_construct(entt::registry& registry, entt::entity entity, model_component& model)
- {
- ::model_instance* model_instance = new ::model_instance();
- model_instances[entity] = model_instance;
- update_model_and_materials(entity, model);
- }
-
- void render_system::on_model_replace(entt::registry& registry, entt::entity entity, model_component& model)
- {
- update_model_and_materials(entity, model);
- }
-
- void render_system::on_model_destroy(entt::registry& registry, entt::entity entity)
- {
- if (auto it = model_instances.find(entity); it != model_instances.end())
- {
- // Remove model instance from all layers
- for (std::size_t i = 0; i < layers.size(); ++i)
- {
- layers[i]->remove_object(it->second);
- }
-
- delete it->second;
- model_instances.erase(it);
- }
- }
-
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