💿🐜 Antkeeper source code
https://antkeeper.com
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260 lines
6.7 KiB
260 lines
6.7 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 "render-system.hpp"
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#include "ecs/components/transform-component.hpp"
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#include "renderer/renderer.hpp"
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#include "scene/point-light.hpp"
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#include "scene/directional-light.hpp"
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#include "scene/ambient-light.hpp"
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#include "scene/spot-light.hpp"
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#include <iostream>
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namespace ecs {
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render_system::render_system(ecs::registry& registry):
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entity_system(registry),
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renderer(nullptr)
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{
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registry.on_construct<model_component>().connect<&render_system::on_model_construct>(this);
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registry.on_replace<model_component>().connect<&render_system::on_model_replace>(this);
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registry.on_destroy<model_component>().connect<&render_system::on_model_destroy>(this);
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registry.on_construct<light_component>().connect<&render_system::on_light_construct>(this);
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registry.on_replace<light_component>().connect<&render_system::on_light_replace>(this);
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registry.on_destroy<light_component>().connect<&render_system::on_light_destroy>(this);
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}
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void render_system::update(double t, double dt)
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{
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// Update model instance transforms
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registry.view<transform_component, model_component>().each
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(
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[this](ecs::entity entity, auto& transform, auto& model)
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{
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scene::model_instance* instance = model_instances[entity];
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instance->set_transform(transform.world);
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if (transform.warp)
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{
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instance->get_transform_tween().update();
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instance->update_tweens();
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transform.warp = false;
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}
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}
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);
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// Update light transforms
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registry.view<transform_component, light_component>().each
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(
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[this](ecs::entity entity, auto& transform, auto& light)
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{
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scene::light* light_object = lights[entity];
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light_object->set_transform(transform.world);
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if (transform.warp)
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{
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light_object->get_transform_tween().update();
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light_object->update_tweens();
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transform.warp = false;
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}
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}
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);
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}
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void render_system::render(double alpha)
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{
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if (renderer)
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{
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for (const scene::collection* collection: layers)
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{
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renderer->render(alpha, *collection);
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}
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}
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}
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void render_system::add_layer(scene::collection* layer)
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{
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layers.push_back(layer);
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}
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void render_system::remove_layers()
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{
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layers.clear();
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}
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void render_system::set_renderer(::renderer* renderer)
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{
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this->renderer = renderer;
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}
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scene::model_instance* render_system::get_model_instance(ecs::entity entity)
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{
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if (auto it = model_instances.find(entity); it != model_instances.end())
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return it->second;
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return nullptr;
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}
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scene::light* render_system::get_light(ecs::entity entity)
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{
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if (auto it = lights.find(entity); it != lights.end())
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return it->second;
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return nullptr;
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}
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void render_system::update_model_and_materials(ecs::entity entity, model_component& model)
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{
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if (auto model_it = model_instances.find(entity); model_it != model_instances.end())
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{
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model_it->second->set_model(model.model);
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model_it->second->set_instanced((model.instance_count > 0), model.instance_count);
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for (auto material_it = model.materials.begin(); material_it != model.materials.end(); ++material_it)
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{
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model_it->second->set_material(material_it->first, material_it->second);
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}
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// Add model instance to its specified layers
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for (std::size_t i = 0; i < std::min<std::size_t>(layers.size(), (sizeof(model.layers) << 3)); ++i)
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{
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layers[i]->remove_object(model_it->second);
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if ((model.layers >> i) & 1)
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{
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layers[i]->add_object(model_it->second);
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}
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}
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}
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}
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void render_system::update_light(ecs::entity entity, ecs::light_component& component)
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{
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if (auto light_it = lights.find(entity); light_it != lights.end())
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{
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scene::light* light = light_it->second;
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light->set_color(component.color);
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light->set_intensity(component.intensity);
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switch (light->get_light_type())
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{
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case scene::light_type::point:
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{
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scene::point_light* point = static_cast<scene::point_light*>(light);
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point->set_attenuation(component.attenuation);
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break;
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}
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case scene::light_type::spot:
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{
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scene::spot_light* spot = static_cast<scene::spot_light*>(light);
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spot->set_attenuation(component.attenuation);
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spot->set_cutoff(component.cutoff);
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break;
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}
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default:
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break;
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}
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}
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}
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void render_system::on_model_construct(ecs::registry& registry, ecs::entity entity, model_component& model)
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{
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scene::model_instance* model_instance = new scene::model_instance();
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model_instances[entity] = model_instance;
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update_model_and_materials(entity, model);
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}
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void render_system::on_model_replace(ecs::registry& registry, ecs::entity entity, model_component& model)
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{
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update_model_and_materials(entity, model);
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}
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void render_system::on_model_destroy(ecs::registry& registry, ecs::entity entity)
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{
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if (auto it = model_instances.find(entity); it != model_instances.end())
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{
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scene::model_instance* model_instance = it->second;
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// Remove model instance from all layers
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for (scene::collection* layer: layers)
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layer->remove_object(model_instance);
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model_instances.erase(it);
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delete model_instance;
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}
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}
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void render_system::on_light_construct(ecs::registry& registry, ecs::entity entity, light_component& component)
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{
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scene::light* light = nullptr;
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switch (component.type)
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{
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case scene::light_type::ambient:
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light = new scene::ambient_light();
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break;
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case scene::light_type::directional:
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light = new scene::directional_light();
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break;
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case scene::light_type::point:
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light = new scene::point_light();
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break;
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case scene::light_type::spot:
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light = new scene::spot_light();
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break;
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default:
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break;
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}
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if (light)
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{
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lights[entity] = light;
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for (scene::collection* layer: layers)
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layer->add_object(light);
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update_light(entity, component);
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}
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}
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void render_system::on_light_replace(ecs::registry& registry, ecs::entity entity, light_component& light)
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{
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update_light(entity, light);
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}
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void render_system::on_light_destroy(ecs::registry& registry, ecs::entity entity)
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{
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if (auto it = lights.find(entity); it != lights.end())
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{
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scene::light* light = it->second;
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for (scene::collection* layer: layers)
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layer->remove_object(light);
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lights.erase(it);
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delete light;
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}
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}
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} // namespace ecs
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