💿🐜 Antkeeper source code
https://antkeeper.com
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127 lines
3.4 KiB
127 lines
3.4 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 "camera-system.hpp"
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#include "game/components/camera-follow-component.hpp"
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#include "game/components/transform-component.hpp"
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#include "scene/camera.hpp"
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#include "math/math.hpp"
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#include <algorithm>
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#include <cmath>
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#include <iostream>
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using namespace ecs;
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camera_system::camera_system(entt::registry& registry):
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entity_system(registry),
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camera(nullptr),
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viewport{0, 0, 0, 0},
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mouse_position{0, 0}
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{
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orbit_cam.set_elevation_limits({math::radians(5.0f), math::radians(89.0f)});
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//orbit_cam.set_elevation_limits({math::radians(-89.0f), math::radians(89.0f)});
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orbit_cam.set_focal_distance_limits({2.0f, 200.0f});
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orbit_cam.set_fov_limits({math::radians(80.0f), math::radians(35.0f)});
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orbit_cam.set_clip_near_limits({0.1f, 5.0f});
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orbit_cam.set_clip_far_limits({100.0f, 5000.0f});
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orbit_cam.set_target_focal_point({0.0f, 0.0f, 0.0f});
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orbit_cam.set_target_azimuth(0.0f);
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orbit_cam.set_target_elevation(math::radians(45.0f));
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orbit_cam.set_target_zoom(0.0f);
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orbit_cam.set_focal_point_oscillation(hz_to_rads(8.0f));
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orbit_cam.set_azimuth_oscillation(hz_to_rads(2.0f));
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orbit_cam.set_elevation_oscillation(hz_to_rads(2.0f));
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orbit_cam.set_zoom_oscillation(hz_to_rads(5.0f));
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orbit_cam.reset_springs();
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}
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void camera_system::update(double t, double dt)
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{
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if (!camera)
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return;
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// Determine target focal point
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int subject_count = 0;
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float3 target_focal_point = {0, 0, 0};
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registry.view<camera_follow_component, transform_component>().each(
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[&](auto entity, auto& follow, auto& transform)
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{
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target_focal_point += transform.local.translation;
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++subject_count;
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});
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if (subject_count > 1)
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target_focal_point /= static_cast<float>(subject_count);
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// Focus at ant's head height off the ground.
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target_focal_point.y += 0.2f;
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// Check for collision with environment
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//...
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orbit_cam.set_target_focal_point(target_focal_point);
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orbit_cam.update(static_cast<float>(dt));
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}
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void camera_system::pan(float angle)
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{
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orbit_cam.pan(angle);
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}
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void camera_system::tilt(float angle)
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{
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orbit_cam.tilt(angle);
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}
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void camera_system::zoom(float factor)
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{
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orbit_cam.zoom(factor);
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}
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void camera_system::set_camera(::camera* camera)
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{
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this->camera = camera;
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if (camera)
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{
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orbit_cam.attach(camera);
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}
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else
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{
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orbit_cam.detach();
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}
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}
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void camera_system::set_viewport(const float4& viewport)
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{
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this->viewport = viewport;
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orbit_cam.set_aspect_ratio(viewport[2] / viewport[3]);
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}
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void camera_system::handle_event(const mouse_moved_event& event)
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{
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mouse_position[0] = event.x;
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mouse_position[1] = event.y;
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}
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void camera_system::handle_event(const window_resized_event& event)
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{
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set_viewport({0.0f, 0.0f, static_cast<float>(event.w), static_cast<float>(event.h)});
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}
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