84 lines
2.6 KiB
C++
Executable File
84 lines
2.6 KiB
C++
Executable File
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CAMUTILS_BOOKMARK_H
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#define CAMUTILS_BOOKMARK_H
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#include <math/vec2.h>
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#include <math/vec3.h>
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namespace filament {
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namespace camutils {
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template <typename FLOAT> class FreeFlightManipulator;
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template <typename FLOAT> class OrbitManipulator;
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template <typename FLOAT> class MapManipulator;
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template <typename FLOAT> class Manipulator;
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enum class Mode { ORBIT, MAP, FREE_FLIGHT };
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/**
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* Opaque memento to a viewing position and orientation (e.g. the "home" camera position).
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*
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* This little struct is meant to be passed around by value and can be used to track camera
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* animation between waypoints. In map mode this implements Van Wijk interpolation.
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*
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* @see Manipulator::getCurrentBookmark, Manipulator::jumpToBookmark
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*/
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template <typename FLOAT>
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struct Bookmark {
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/**
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* Interpolates between two bookmarks. The t argument must be between 0 and 1 (inclusive), and
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* the two endpoints must have the same mode (ORBIT or MAP).
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*/
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static Bookmark<FLOAT> interpolate(Bookmark<FLOAT> a, Bookmark<FLOAT> b, double t);
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/**
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* Recommends a duration for animation between two MAP endpoints. The return value is a unitless
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* multiplier.
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*/
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static double duration(Bookmark<FLOAT> a, Bookmark<FLOAT> b);
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private:
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struct MapParams {
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FLOAT extent;
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filament::math::vec2<FLOAT> center;
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};
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struct OrbitParams {
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FLOAT phi;
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FLOAT theta;
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FLOAT distance;
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filament::math::vec3<FLOAT> pivot;
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};
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struct FlightParams {
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FLOAT pitch;
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FLOAT yaw;
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filament::math::vec3<FLOAT> position;
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};
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Mode mode;
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MapParams map;
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OrbitParams orbit;
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FlightParams flight;
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friend class FreeFlightManipulator<FLOAT>;
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friend class OrbitManipulator<FLOAT>;
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friend class MapManipulator<FLOAT>;
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};
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} // namespace camutils
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} // namespace filament
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#endif // CAMUTILS_BOOKMARK_H
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