+++ /dev/null
-/*! ========================================================================
-** Extended Template Library
-** Hermite Template Class Implementation
-** $Id$
-**
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
-**
-** 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.
-**
-** === N O T E S ===========================================================
-**
-** This is an internal header file, included by other ETL headers.
-** You should not attempt to use it directly.
-**
-** ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __ETL_HERMITE_H
-#define __ETL_HERMITE_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "bezier"
-
-/* === M A C R O S ========================================================= */
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-_ETL_BEGIN_NAMESPACE
-
-/*
-template <typename T>
-class hermite_base : std::unary_function<float,T>
-{
-public:
- typedef T value_type;
- typedef float time_type;
-private:
- affine_combo<value_type,time_type> affine_func;
- value_type a,b,c,d;
- time_type r,s;
-
- value_type _coeff[3];
- time_type drs; // reciprocal of (s-r)
-public:
- hermite_base():r(0.0),s(1.0) { drs=1.0/(s-r); }
- hermite_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),r(r),s(s) { sync(); }
-
- void sync(void)
- {
- drs=1.0/(s-r);
- _coeff[0]= c;
- _coeff[1]=-d*1 - c*2 + b*3 - a*3;
- _coeff[2]= d*1 + c*1 - b*2 + a*2;
- }
-
- inline value_type
- operator()(time_type t)const
- { t-=r; t*=drs; return a + (_coeff[0]+(_coeff[1]+(_coeff[2])*t)*t)*t; }
-
- void set_rs(time_type new_r, time_type new_s) { r=new_r; s=new_s; drs=1.0/(s-r); }
- void set_r(time_type new_r) { r=new_r; drs=1.0/(s-r); }
- void set_s(time_type new_s) { s=new_s; drs=1.0/(s-r); }
- const time_type &get_r(void)const { return r; }
- const time_type &get_s(void)const { return s; }
- time_type get_dt(void)const { return s-r; }
-
- value_type &
- operator[](int i)
- { return (&a)[i]; }
-
- const value_type &
- operator[](int i) const
- { return (&a)[i]; }
-};
-
-
-template <typename T>
-class hermite : public hermite_base<T>
-{
-public:
- typedef T value_type;
- typedef float time_type;
-
-
-
-public:
- hermite() { }
- hermite(const value_type &p1, const value_type &p2, const value_type &t1, const value_type &t2):
- P1(p1),P2(p2),T1(t1),T2(t2) { sync(); }
- hermite(const value_type &p1, const value_type &p2):
- P1(p1),P2(p2),T1(p2-p1),T2(p2-p1) { sync(); }
-
- value_type P1,P2,T1,T2;
-
- value_type &p1(void) { return P1; }
- value_type &p2(void) { return P2; }
- value_type &t1(void) { return T1; }
- value_type &t2(void) { return T2; }
-
- void sync(void)
- {
-// hermite_base<T>::operator[](0)=P1;
-// bezier<T>::operator[](1)=P1+T1/3;
-// bezier<T>::operator[](2)=P2-T2/3;
-// bezier<T>::operator[](3)=P2;
-
- hermite_base<T>::operator[](0)=P1;
- hermite_base<T>::operator[](1)=P2;
- hermite_base<T>::operator[](2)=T1;
- hermite_base<T>::operator[](3)=T2;
-
- hermite_base<T>::sync();
- }
-
-};
-
-*/
-
-template <typename V,typename T=float>
-class hermite : public bezier<V,T>
-{
-public:
- typedef V value_type;
- typedef T time_type;
-
-
-
-public:
- hermite() { }
- hermite(const value_type &p1, const value_type &p2, const value_type &t1, const value_type &t2):
- P1(p1),P2(p2),T1(t1),T2(t2) { sync(); }
- hermite(const value_type &p1, const value_type &p2):
- P1(p1),P2(p2),T1(p2-p1),T2(p2-p1) { sync(); }
-
- value_type P1,P2,T1,T2;
-
- value_type &p1() { return P1; }
- value_type &p2() { return P2; }
- value_type &t1() { return T1; }
- value_type &t2() { return T2; }
-
- void sync()
- {
- bezier<V,T>::operator[](0)=P1;
- bezier<V,T>::operator[](1)=P1+T1/3;
- bezier<V,T>::operator[](2)=P2-T2/3;
- bezier<V,T>::operator[](3)=P2;
-
- bezier<V,T>::sync();
- }
-};
-
-_ETL_END_NAMESPACE
-
-/* === E X T E R N S ======================================================= */
-
-/* === E N D =============================================================== */
-
-#endif
projects / synfig.git / blobdiff