+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file vector.h
-** \brief Various discreet type definitions
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-** Copyright (c) 2007 Chris Moore
-**
-** This package 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 2 of
-** the License, or (at your option) any later version.
-**
-** This package 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.
-** \endlegal
-*/
-/* ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __SYNFIG_VECTOR_H
-#define __SYNFIG_VECTOR_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "angle.h"
-#include "real.h"
-#include <math.h>
-
-/* === M A C R O S ========================================================= */
-
-
-#ifdef WIN32
-#include <float.h>
-#ifndef isnan
-extern "C" { int _isnan(double x); }
-#define isnan _isnan
-#endif
-#endif
-
-// For some reason isnan() isn't working on macosx any more.
-// This is a quick fix.
-#if defined(__APPLE__) && !defined(SYNFIG_ISNAN_FIX)
-#ifdef isnan
-#undef isnan
-#endif
-inline bool isnan(double x) { return x != x; }
-inline bool isnan(float x) { return x != x; }
-#define SYNFIG_ISNAN_FIX 1
-#endif
-
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-namespace synfig {
-
-/*! \class Vector
-** \todo writeme
-*/
-class Vector
-{
-public:
- typedef Real value_type;
-
-private:
- value_type _x, _y;
-
-public:
- Vector(): _x(0.0), _y(0.0) { };
- Vector(const value_type &x, const value_type &y):_x(x),_y(y) { };
-
- bool is_valid()const { return !(isnan(_x) || isnan(_y)); }
-
- value_type &
- operator[](const int& i)
- { return i?_y:_x; }
-
- const value_type &
- operator[](const int& i) const
- { return i?_y:_x; }
-
- const Vector &
- operator+=(const Vector &rhs)
- {
- _x+=rhs._x;
- _y+=rhs._y;
- return *this;
- }
-
- const Vector &
- operator-=(const Vector &rhs)
- {
- _x-=rhs._x;
- _y-=rhs._y;
- return *this;
- }
-
- const Vector &
- operator*=(const value_type &rhs)
- {
- _x*=rhs;
- _y*=rhs;
- return *this;
- }
-
- const Vector &
- operator/=(const value_type &rhs)
- {
- value_type tmp=1.0/rhs;
- _x*=tmp;
- _y*=tmp;
- return *this;
- }
-
- Vector
- operator+(const Vector &rhs)const
- { return Vector(*this)+=rhs; }
-
- Vector
- operator-(const Vector &rhs)const
- { return Vector(*this)-=rhs; }
-
- Vector
- operator*(const value_type &rhs)const
- { return Vector(*this)*=rhs; }
-
- Vector
- operator/(const value_type &rhs)const
- { return Vector(*this)/=rhs; }
-
- Vector
- operator-()const
- { return Vector(-_x,-_y); }
-
- value_type
- operator*(const Vector &rhs)const
- { return _x*rhs._x+_y*rhs._y; }
-
- bool
- operator==(const Vector &rhs)const
- { return _x==rhs._x && _y==rhs._y; }
-
- bool
- operator!=(const Vector &rhs)const
- { return _y!=rhs._y || _x!=rhs._x; }
-
- //! Returns the squared magnitude of the vector
- value_type mag_squared()const
- { return _x*_x+_y*_y; }
-
- //! Returns the magnitude of the vector
- value_type mag()const
- { return sqrt(mag_squared()); }
-
- //! Returns the reciprocal of the magnitude of the vector
- value_type inv_mag()const
- { return 1.0/sqrt(mag_squared()); }
-
- //! Returns a normalized version of the vector
- Vector norm()const
- { return (*this)*inv_mag(); }
-
- //! Returns a perpendicular version of the vector
- Vector perp()const
- { return Vector(_y,-_x); }
-
- Angle angle()const
- { return Angle::rad(atan2(_y, _x)); }
-
- bool is_equal_to(const Vector& rhs)const
- {
- static const value_type epsilon(0.0000000000001);
-// return (_x>rhs._x)?_x-rhs._x<=epsilon:rhs._x-_x<=epsilon && (_y>rhs._y)?_y-rhs._y<=epsilon:rhs._y-_y<=epsilon;
- return (*this-rhs).mag_squared()<=epsilon;
- }
-
- static const Vector zero() { return Vector(0,0); }
-};
-
-/*! \typedef Point
-** \todo writeme
-*/
-typedef Vector Point;
-
-
-
-}; // END of namespace synfig
-
-namespace std {
-
-inline synfig::Vector::value_type
-abs(const synfig::Vector &rhs)
- { return rhs.mag(); }
-
-}; // END of namespace std
-
-#include <ETL/bezier>
-
-_ETL_BEGIN_NAMESPACE
-
-template <>
-class bezier_base<synfig::Vector,float> : public std::unary_function<float,synfig::Vector>
-{
-public:
- typedef synfig::Vector value_type;
- typedef float time_type;
-private:
-
- bezier_base<synfig::Vector::value_type,time_type> bezier_x,bezier_y;
-
- value_type a,b,c,d;
-
-protected:
- affine_combo<value_type,time_type> affine_func;
-
-public:
- bezier_base() { }
- bezier_base(
- const value_type &a, const value_type &b, const value_type &c, const value_type &d,
- const time_type &r=0.0, const time_type &s=1.0):
- a(a),b(b),c(c),d(d) { set_rs(r,s); sync(); }
-
- void sync()
- {
- bezier_x[0]=a[0],bezier_y[0]=a[1];
- bezier_x[1]=b[0],bezier_y[1]=b[1];
- bezier_x[2]=c[0],bezier_y[2]=c[1];
- bezier_x[3]=d[0],bezier_y[3]=d[1];
- bezier_x.sync();
- bezier_y.sync();
- }
-
- value_type
- operator()(time_type t)const
- {
- return synfig::Vector(bezier_x(t),bezier_y(t));
- }
-
- void evaluate(time_type t, value_type &f, value_type &df) const
- {
- t=(t-get_r())/get_dt();
-
- const value_type p1 = affine_func(
- affine_func(a,b,t),
- affine_func(b,c,t)
- ,t);
- const value_type p2 = affine_func(
- affine_func(b,c,t),
- affine_func(c,d,t)
- ,t);
-
- f = affine_func(p1,p2,t);
- df = (p2-p1)*3;
- }
-
- void set_rs(time_type new_r, time_type new_s) { bezier_x.set_rs(new_r,new_s); bezier_y.set_rs(new_r,new_s); }
- void set_r(time_type new_r) { bezier_x.set_r(new_r); bezier_y.set_r(new_r); }
- void set_s(time_type new_s) { bezier_x.set_s(new_s); bezier_y.set_s(new_s); }
- const time_type &get_r()const { return bezier_x.get_r(); }
- const time_type &get_s()const { return bezier_x.get_s(); }
- time_type get_dt()const { return bezier_x.get_dt(); }
-
- value_type &
- operator[](int i)
- { return (&a)[i]; }
-
- const value_type &
- operator[](int i) const
- { return (&a)[i]; }
-
- //! Bezier curve intersection function
- time_type intersect(const bezier_base<value_type,time_type> &/*x*/, time_type /*near*/=0.0)const
- {
- return 0;
- }
-};
-
-_ETL_END_NAMESPACE
-
-
-/* === E N D =============================================================== */
-
-#endif
projects / synfig.git / blobdiff