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56 lines
1.2 KiB
56 lines
1.2 KiB
4 years ago
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#ifndef GFXARCBALL_INCLUDED // -*- C++ -*-
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#define GFXARCBALL_INCLUDED
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#if !defined(__GNUC__)
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# pragma once
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#endif
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/************************************************************************
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Arcball rotation control.
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$Id: arcball.h 427 2004-09-27 04:45:31Z garland $
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************************************************************************/
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#include "baseball.h"
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namespace gfx
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{
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class Arcball : public Baseball
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{
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private:
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Vec2 ball_ctr;
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double ball_radius;
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Quat q_now, q_down, q_drag; // Quaternions describing rotation
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Vec3 v_from, v_to; //
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bool is_dragging;
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protected:
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Vec3 proj_to_sphere(const Vec2&);
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void update();
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public:
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Arcball();
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virtual void update_animation();
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virtual bool mouse_down(int *where, int which);
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virtual bool mouse_up(int *where, int which);
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virtual bool mouse_drag(int *where, int *last, int which);
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virtual void apply_transform();
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virtual void get_transform(Vec3 & c, Vec3 &t, Quat & q);
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virtual void set_transform(const Vec3 & c, const Vec3 & t, const Quat & q);
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virtual void write(std::ostream&);
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virtual void read(std::istream&);
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};
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} // namespace gfx
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// GFXARCBALL_INCLUDED
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#endif
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