💿🐜 Antkeeper source code
https://antkeeper.com
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154 lines
4.4 KiB
154 lines
4.4 KiB
/*
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* Copyright (C) 2020 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 "orbit-cam.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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orbit_cam::orbit_cam():
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elevation_rotation(math::identity_quaternion<float>),
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azimuth_rotation(math::identity_quaternion<float>),
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target_elevation_rotation(math::identity_quaternion<float>),
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target_azimuth_rotation(math::identity_quaternion<float>),
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target_rotation(math::identity_quaternion<float>)
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{}
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orbit_cam::~orbit_cam()
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{}
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void orbit_cam::update(float dt)
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{
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float interpolation_factor = 1.0f;
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// Calculate rotation and target rotation quaternions
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//rotation = azimuth_rotation * elevation_rotation;
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target_rotation = math::normalize(target_azimuth_rotation * target_elevation_rotation);
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// Calculate target translation
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target_translation = target_focal_point + target_rotation * float3{0.0f, 0.0f, target_focal_distance};
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// Interpolate rotation
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//rotation = glm::mix(rotation, target_rotation, interpolation_factor);
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// Interpolate angles
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set_elevation(math::lerp(elevation, target_elevation, interpolation_factor));
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set_azimuth(math::lerp(azimuth, target_azimuth, interpolation_factor));
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// Calculate rotation
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set_rotation(math::normalize(azimuth_rotation * elevation_rotation));
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// Interpolate focal point and focal distance
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focal_point = math::lerp(focal_point, target_focal_point, interpolation_factor);
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focal_distance = math::lerp(focal_distance, target_focal_distance, interpolation_factor);
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// Caluclate translation
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set_translation(focal_point + get_rotation() * float3{0.0f, 0.0f, focal_distance});
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/*
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// Recalculate azimuth
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azimuth_rotation = rotation;
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azimuth_rotation.x = 0.0f;
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azimuth_rotation.z = 0.0f;
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azimuth_rotation = glm::normalize(azimuth_rotation);
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azimuth = 2.0f * std::acos(azimuth_rotation.w);
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// Recalculate elevation
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elevation_rotation = rotation;
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elevation_rotation.y = 0.0f;
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elevation_rotation.z = 0.0f;
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elevation_rotation = glm::normalize(elevation_rotation);
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elevation = 2.0f * std::acos(elevation_rotation.w);
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*/
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// Update camera
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if (get_camera() != nullptr)
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{
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transform_type transform = math::identity_transform<float>;
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transform.translation = get_translation();
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transform.rotation = get_rotation();
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get_camera()->set_transform(transform);
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//get_camera()->look_at(get_translation(), get_translation() + get_forward(), get_up());
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}
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}
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void orbit_cam::move(const float2& direction)
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{
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target_focal_point += azimuth_rotation * float3{direction[0], 0.0f, direction[1]};
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}
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void orbit_cam::rotate(float angle)
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{
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set_target_azimuth(target_azimuth + angle);
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}
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void orbit_cam::tilt(float angle)
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{
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set_target_elevation(target_elevation + angle);
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}
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void orbit_cam::zoom(float distance)
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{
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set_target_focal_distance(target_focal_distance - distance);
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}
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void orbit_cam::set_focal_point(const float3& point)
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{
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focal_point = point;
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}
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void orbit_cam::set_focal_distance(float distance)
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{
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focal_distance = distance;
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}
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void orbit_cam::set_elevation(float angle)
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{
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elevation = angle;
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elevation_rotation = math::angle_axis(elevation, float3{-1.0f, 0.0f, 0.0f});
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}
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void orbit_cam::set_azimuth(float angle)
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{
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azimuth = angle;
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azimuth_rotation = math::angle_axis(azimuth, float3{0.0f, 1.0f, 0.0f});
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}
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void orbit_cam::set_target_focal_point(const float3& point)
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{
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target_focal_point = point;
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}
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void orbit_cam::set_target_focal_distance(float distance)
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{
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target_focal_distance = distance;
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}
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void orbit_cam::set_target_elevation(float angle)
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{
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target_elevation = angle;
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target_elevation_rotation = math::angle_axis(target_elevation, float3{-1.0f, 0.0f, 0.0f});
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}
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void orbit_cam::set_target_azimuth(float angle)
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{
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target_azimuth = angle;
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target_azimuth_rotation = math::angle_axis(target_azimuth, float3{0.0f, 1.0f, 0.0f});
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}
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