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- /*
- * Copyright (C) 2017-2019 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 "tool-system.hpp"
-
- ToolSystem::ToolSystem(ComponentManager* componentManager):
- System(componentManager),
- tools(componentManager),
- picked(false)
- {
- tools.addGroupObserver(this);
- }
-
- ToolSystem::~ToolSystem()
- {}
-
- void ToolSystem::update(float t, float dt)
- {
- pick();
-
- auto members = tools.getMembers();
- for (const ToolGroup::Member* member: *members)
- {
- ModelComponent* model = std::get<0>(member->components);
- ToolComponent* tool = std::get<1>(member->components);
- TransformComponent* transform = std::get<2>(member->components);
-
- model->model.setActive(tool->active);
-
- if (picked)
- {
- transform->transform.translation = mouseWorldPosition;
- }
- }
-
- picked = false;
- }
-
- void ToolSystem::setPickingCamera(const Camera* camera)
- {
- pickingCamera = camera;
- }
-
- void ToolSystem::setPickingViewport(const Vector4& viewport)
- {
- pickingViewport = viewport;
- }
-
- void ToolSystem::pick()
- {
- Vector3 mouseNear = pickingCamera->unproject(Vector3(mouseScreenPosition, 0.0f), pickingViewport);
- Vector3 mouseFar = pickingCamera->unproject(Vector3(mouseScreenPosition, 1.0f), pickingViewport);
-
- Ray pickingRay;
- pickingRay.origin = mouseNear;
- pickingRay.direction = glm::normalize(mouseFar - mouseNear);
- Plane pickingPlane(Vector3(0.0f, 1.0f, 0.0f), Vector3(0.0f));
-
- auto pickingIntersection = pickingRay.intersects(pickingPlane);
- picked = std::get<0>(pickingIntersection);
- if (picked)
- {
- mouseWorldPosition = pickingRay.extrapolate(std::get<1>(pickingIntersection));
- }
- }
-
- void ToolSystem::memberRegistered(const ToolGroup::Member* member)
- {
- ToolComponent* tool = std::get<1>(member->components);
- tool->active = false;
- }
-
- void ToolSystem::memberUnregistered(const ToolGroup::Member* member)
- {}
-
- void ToolSystem::handleEvent(const MouseMovedEvent& event)
- {
- mouseScreenPosition = Vector2(event.x, pickingViewport[3] - event.y);
- }
-
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