1 /* === S Y N F I G ========================================================= */
2 /*! \file valuenode_blinecalcwidth.cpp
3 ** \brief Implementation of the "BLine Width" valuenode conversion.
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 ** Copyright (c) 2008 Chris Moore
11 ** This package is free software; you can redistribute it and/or
12 ** modify it under the terms of the GNU General Public License as
13 ** published by the Free Software Foundation; either version 2 of
14 ** the License, or (at your option) any later version.
16 ** This package is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ** General Public License for more details.
22 /* ========================================================================= */
24 /* === H E A D E R S ======================================================= */
33 #include "valuenode_blinecalcwidth.h"
34 #include "valuenode_bline.h"
35 #include "valuenode_const.h"
36 #include "valuenode_composite.h"
38 #include "exception.h"
39 #include <ETL/hermite>
44 /* === U S I N G =========================================================== */
48 using namespace synfig;
50 /* === M A C R O S ========================================================= */
52 /* === G L O B A L S ======================================================= */
54 /* === P R O C E D U R E S ================================================= */
56 /* === M E T H O D S ======================================================= */
58 ValueNode_BLineCalcWidth::ValueNode_BLineCalcWidth(const ValueBase::Type &x):
61 if(x!=ValueBase::TYPE_REAL)
62 throw Exception::BadType(ValueBase::type_local_name(x));
64 ValueNode_BLine* value_node(new ValueNode_BLine());
65 set_link("bline",value_node);
66 set_link("loop",ValueNode_Const::create(bool(false)));
67 set_link("amount",ValueNode_Const::create(Real(0.5)));
71 ValueNode_BLineCalcWidth::create_new()const
73 return new ValueNode_BLineCalcWidth(ValueBase::TYPE_REAL);
76 ValueNode_BLineCalcWidth*
77 ValueNode_BLineCalcWidth::create(const ValueBase &x)
79 return new ValueNode_BLineCalcWidth(x.get_type());
82 ValueNode_BLineCalcWidth::~ValueNode_BLineCalcWidth()
88 ValueNode_BLineCalcWidth::operator()(Time t)const
90 const std::vector<ValueBase> bline((*bline_)(t));
91 handle<ValueNode_BLine> bline_value_node(bline_);
92 const bool looped(bline_value_node->get_loop());
93 int size = bline.size(), from_vertex;
94 bool loop((*loop_)(t).get(bool()));
95 Real amount((*amount_)(t).get(Real()));
96 BLinePoint blinepoint0, blinepoint1;
99 if (size < 1) return Real();
102 amount = amount - int(amount);
103 if (amount < 0) amount++;
107 if (amount < 0) amount = 0;
108 if (amount > 1) amount = 1;
111 vector<ValueBase>::const_iterator iter, next(bline.begin());
113 iter = looped ? --bline.end() : next++;
114 amount = amount * size;
115 from_vertex = int(amount);
116 if (from_vertex > size-1) from_vertex = size-1;
117 blinepoint0 = from_vertex ? *(next+from_vertex-1) : *iter;
118 blinepoint1 = *(next+from_vertex);
120 float width0 = blinepoint0.get_width();
121 float width1 = blinepoint1.get_width();
123 return Real(width0 + (amount-from_vertex) * (width1-width0));
133 ValueNode_BLineCalcWidth::get_name()const
135 return "blinecalcwidth";
139 ValueNode_BLineCalcWidth::get_local_name()const
141 return _("BLine Width");
145 ValueNode_BLineCalcWidth::set_link_vfunc(int i,ValueNode::Handle value)
147 assert(i>=0 && i<link_count());
151 case 0: CHECK_TYPE_AND_SET_VALUE(bline_, ValueBase::TYPE_LIST);
152 case 1: CHECK_TYPE_AND_SET_VALUE(loop_, ValueBase::TYPE_BOOL);
153 case 2: CHECK_TYPE_AND_SET_VALUE(amount_, ValueBase::TYPE_REAL);
158 ValueNode::LooseHandle
159 ValueNode_BLineCalcWidth::get_link_vfunc(int i)const
161 assert(i>=0 && i<link_count());
165 case 0: return bline_;
166 case 1: return loop_;
167 case 2: return amount_;
174 ValueNode_BLineCalcWidth::link_count()const
180 ValueNode_BLineCalcWidth::link_name(int i)const
182 assert(i>=0 && i<link_count());
186 case 0: return "bline";
187 case 1: return "loop";
188 case 2: return "amount";
194 ValueNode_BLineCalcWidth::link_local_name(int i)const
196 assert(i>=0 && i<link_count());
200 case 0: return _("BLine");
201 case 1: return _("Loop");
202 case 2: return _("Amount");
208 ValueNode_BLineCalcWidth::get_link_index_from_name(const String &name)const
210 if(name=="bline") return 0;
211 if(name=="loop") return 1;
212 if(name=="amount") return 2;
213 throw Exception::BadLinkName(name);
217 ValueNode_BLineCalcWidth::check_type(ValueBase::Type type)
219 return type==ValueBase::TYPE_REAL;