💿🐜 Antkeeper source code
https://antkeeper.com
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138 lines
3.4 KiB
138 lines
3.4 KiB
/*
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* Copyright (C) 2017 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 "ant.hpp"
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Ant::Ant(Colony* colony):
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colony(colony),
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state(Ant::State::IDLE),
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transform(Transform::getIdentity()),
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skeletonPose(nullptr)
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{
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modelInstance.setModel(colony->getAntModel());
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}
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void Ant::move(const Vector3& velocity)
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{
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std::vector<Navmesh::Step> traversal;
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Navmesh::traverse(getNavmeshTriangle(), getBarycentricPosition(), velocity, &traversal);
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if (!traversal.empty())
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{
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const Navmesh::Step& step = traversal.back();
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if (step.start != step.end)
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{
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if (step.triangle != getNavmeshTriangle())
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{
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Quaternion alignment = glm::rotation(getNavmeshTriangle()->normal, step.triangle->normal);
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Vector3 newForward = glm::normalize(project_on_plane(alignment * getForward(), Vector3(0.0f), step.triangle->normal));
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setOrientation(newForward, step.triangle->normal);
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}
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}
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setPosition(step.triangle, step.end);
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}
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}
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void Ant::turn(float angle)
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{
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// Rotate forward vector
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Vector3 newForward = glm::normalize(glm::angleAxis(angle, getUp()) * getForward());
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setOrientation(newForward, getUp());
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}
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void Ant::update(float dt)
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{
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if (state == Ant::State::WANDER)
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{
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setWanderCircleDistance(3.0f);
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setWanderCircleRadius(0.25f);
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setWanderRate(glm::radians(90.0f));
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// Calculate wander force
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Vector3 wanderForce = wander(dt);
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// Setup containment probes
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float probeLateralOffset = 0.35f;
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Vector3 forwardProbe = getForward() * 0.5f;
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Vector3 leftProbe = getForward() * 0.1f - getRight() * probeLateralOffset;
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Vector3 rightProbe = getForward() * 0.1f + getRight() * probeLateralOffset;
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// Calculate containment force
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Vector3 containmentForce = containment(forwardProbe)
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+ containment(leftProbe)
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+ containment(rightProbe);
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// Calculate velocity
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Vector3 velocity(0.0f);
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velocity += wanderForce;
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velocity += containmentForce;
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velocity = limit(velocity, 0.025f);
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setOrientation(glm::normalize(velocity), getUp());
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// Move ant
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move(velocity);
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}
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// Update transform
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transform.translation = getPosition();
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transform.rotation = getRotation();
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// Update model instance
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modelInstance.setTransform(transform);
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}
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void Ant::setState(Ant::State state)
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{
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this->state = state;
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}
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Colony::Colony():
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antModel(nullptr)
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{}
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Ant* Colony::spawn(Navmesh* navmesh, Navmesh::Triangle* triangle, const Vector3& position)
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{
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// Allocate ant
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Ant* ant = new Ant(this);
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// Position it on the navmesh
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ant->setPosition(triangle, position);
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// Add ant to the colony
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ants.push_back(ant);
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return ant;
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}
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void Colony::update(float dt)
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{
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for (Ant* ant: ants)
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{
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ant->update(dt);
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}
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}
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void Colony::setAntModel(Model* model)
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{
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this->antModel = model;
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}
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