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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 "camera-rig.hpp"
- #include <algorithm>
- #include <cmath>
-
- CameraRig::CameraRig():
- camera(nullptr),
- translation(0.0f),
- rotation(1.0f, 0.0f, 0.0f, 0.0f),
- forward(0.0f, 0.0f, -1.0f),
- right(1.0f, 0.0f, 0.0f),
- up(0.0f, 1.0f, 0.0f)
- {}
-
- void CameraRig::attachCamera(Camera* camera)
- {
- this->camera = camera;
- if (camera != nullptr)
- {
- camera->lookAt(translation, translation + forward, up);
- }
- }
-
- void CameraRig::detachCamera()
- {
- camera = nullptr;
- }
-
- void CameraRig::setTranslation(const Vector3& translation)
- {
- this->translation = translation;
- }
-
- void CameraRig::setRotation(const Quaternion& rotation)
- {
- this->rotation = rotation;
-
- // Calculate orthonormal basis
- forward = glm::normalize(rotation * Vector3(0.0f, 0.0f, -1.0f));
- up = glm::normalize(rotation * Vector3(0.0f, 1.0f, 0.0f));
- right = glm::normalize(glm::cross(forward, up));
- }
-
- FreeCam::FreeCam():
- pitchRotation(1.0f, 0.0f, 0.0f, 0.0f),
- yawRotation(1.0f, 0.0f, 0.0f, 0.0f),
- pitch(0.0f),
- yaw(0.0f)
- {}
-
- FreeCam::~FreeCam()
- {}
-
- void FreeCam::update(float dt)
- {
- if (getCamera() != nullptr)
- {
- getCamera()->lookAt(getTranslation(), getTranslation() + getForward(), getUp());
- }
- }
-
- void FreeCam::move(const Vector2& velocity)
- {
- setTranslation(getTranslation() + getForward() * -velocity.y + getRight() * velocity.x);
- }
-
- float wrapAngle(float x)
- {
- x = std::fmod(x + glm::pi<float>(), glm::pi<float>() * 2.0f);
- if (x < 0.0f)
- {
- x += glm::pi<float>() * 2.0f;
- }
-
- return x - glm::pi<float>();
- }
-
- void FreeCam::rotate(float pan, float tilt)
- {
- pitch = wrapAngle(pitch + tilt);
- yaw = wrapAngle(yaw + pan);
-
- pitch = std::min<float>(std::max<float>(glm::radians(-89.0f), pitch), glm::radians(89.0f));
-
- // Form quaternions from pan and tilt angles
- pitchRotation = glm::angleAxis(pitch,Vector3(1.0f, 0.0f, 0.0f));
- yawRotation = glm::angleAxis(yaw, Vector3(0.0f, 1.0f, 0.0f));
-
- // Rotate camera
- setRotation(glm::normalize(yawRotation * pitchRotation));
- }
-
- OrbitCam::OrbitCam():
- elevationRotation(1, 0, 0, 0),
- azimuthRotation(1, 0, 0, 0),
- targetElevationRotation(1, 0, 0, 0),
- targetAzimuthRotation(1, 0, 0, 0),
- targetRotation(1, 0, 0, 0)
- {}
-
- OrbitCam::~OrbitCam()
- {}
-
- void OrbitCam::update(float dt)
- {
- float interpolationFactor = 0.25f / (1.0 / 60.0f) * dt;
-
- // Calculate rotation and target rotation quaternions
- //rotation = azimuthRotation * elevationRotation;
- targetRotation = targetAzimuthRotation * targetElevationRotation;
-
- // Calculate target translation
- targetTranslation = targetFocalPoint + targetRotation * Vector3(0.0f, 0.0f, targetFocalDistance);
-
- // Interpolate rotation
- //rotation = glm::mix(rotation, targetRotation, interpolationFactor);
-
- // Interpolate angles
- setElevation(glm::mix(elevation, targetElevation, interpolationFactor));
- setAzimuth(glm::mix(azimuth, targetAzimuth, interpolationFactor));
-
- // Calculate rotation
- setRotation(azimuthRotation * elevationRotation);
-
- // Interpolate focal point and focal distance
- focalPoint = glm::mix(focalPoint, targetFocalPoint, interpolationFactor);
- focalDistance = glm::mix(focalDistance, targetFocalDistance, interpolationFactor);
-
- // Caluclate translation
- setTranslation(focalPoint + getRotation() * Vector3(0.0f, 0.0f, focalDistance));
- /*
- // Recalculate azimuth
- azimuthRotation = rotation;
- azimuthRotation.x = 0.0f;
- azimuthRotation.z = 0.0f;
- azimuthRotation = glm::normalize(azimuthRotation);
- azimuth = 2.0f * std::acos(azimuthRotation.w);
-
- // Recalculate elevation
- elevationRotation = rotation;
- elevationRotation.y = 0.0f;
- elevationRotation.z = 0.0f;
- elevationRotation = glm::normalize(elevationRotation);
- elevation = 2.0f * std::acos(elevationRotation.w);
- */
-
- // Update camera
- if (getCamera() != nullptr)
- {
- getCamera()->lookAt(getTranslation(), getTranslation() + getForward(), getUp());
- }
- }
-
- void OrbitCam::move(Vector2 direction)
- {
- targetFocalPoint += azimuthRotation * Vector3(direction.x, 0.0f, direction.y);
- }
-
- void OrbitCam::rotate(float angle)
- {
- setTargetAzimuth(targetAzimuth + angle);
- }
-
- void OrbitCam::zoom(float distance)
- {
- setTargetFocalDistance(targetFocalDistance - distance);
- }
-
- void OrbitCam::setFocalPoint(const Vector3& point)
- {
- focalPoint = point;
- }
-
- void OrbitCam::setFocalDistance(float distance)
- {
- focalDistance = distance;
- }
-
- void OrbitCam::setElevation(float angle)
- {
- elevation = angle;
- elevationRotation = glm::angleAxis(elevation, Vector3(-1.0f, 0.0f, 0.0f));
- }
-
- void OrbitCam::setAzimuth(float angle)
- {
- azimuth = angle;
- azimuthRotation = glm::angleAxis(azimuth, Vector3(0.0f, 1.0f, 0.0f));
- }
-
- void OrbitCam::setTargetFocalPoint(const Vector3& point)
- {
- targetFocalPoint = point;
- }
-
- void OrbitCam::setTargetFocalDistance(float distance)
- {
- targetFocalDistance = distance;
- }
-
- void OrbitCam::setTargetElevation(float angle)
- {
- targetElevation = angle;
- targetElevationRotation = glm::angleAxis(targetElevation, Vector3(-1.0f, 0.0f, 0.0f));
- }
-
- void OrbitCam::setTargetAzimuth(float angle)
- {
- targetAzimuth = angle;
- targetAzimuthRotation = glm::angleAxis(targetAzimuth, Vector3(0.0f, 1.0f, 0.0f));
- }
-
- ShadowCam::ShadowCam():
- light(nullptr)
- {}
-
- ShadowCam::~ShadowCam()
- {}
-
- void ShadowCam::setLight(const PunctualLight* light)
- {
- this->light = light;
-
- if (light != nullptr)
- {
-
- }
- }
-
- void ShadowCam::update(float dt)
- {
-
- }
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