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 Vocab ret(get_children_vocab());
62 set_children_vocab(ret);
63 if(x!=ValueBase::TYPE_REAL)
64 throw Exception::BadType(ValueBase::type_local_name(x));
66 ValueNode_BLine* value_node(new ValueNode_BLine());
67 set_link("bline",value_node);
68 set_link("loop",ValueNode_Const::create(bool(false)));
69 set_link("amount",ValueNode_Const::create(Real(0.5)));
70 set_link("scale",ValueNode_Const::create(Real(1.0)));
74 ValueNode_BLineCalcWidth::create_new()const
76 return new ValueNode_BLineCalcWidth(ValueBase::TYPE_REAL);
79 ValueNode_BLineCalcWidth*
80 ValueNode_BLineCalcWidth::create(const ValueBase &x)
82 return new ValueNode_BLineCalcWidth(x.get_type());
85 ValueNode_BLineCalcWidth::~ValueNode_BLineCalcWidth()
91 ValueNode_BLineCalcWidth::operator()(Time t, Real amount)const
93 if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
94 printf("%s:%d operator()\n", __FILE__, __LINE__);
96 const std::vector<ValueBase> bline((*bline_)(t).get_list());
97 handle<ValueNode_BLine> bline_value_node(bline_);
98 const bool looped(bline_value_node->get_loop());
99 int size = bline.size(), from_vertex;
100 bool loop((*loop_)(t).get(bool()));
101 Real scale((*scale_)(t).get(Real()));
102 BLinePoint blinepoint0, blinepoint1;
105 if (size < 1) return Real();
108 amount = amount - int(amount);
109 if (amount < 0) amount++;
113 if (amount < 0) amount = 0;
114 if (amount > 1) amount = 1;
117 vector<ValueBase>::const_iterator iter, next(bline.begin());
119 iter = looped ? --bline.end() : next++;
120 amount = amount * size;
121 from_vertex = int(amount);
122 if (from_vertex > size-1) from_vertex = size-1;
123 blinepoint0 = from_vertex ? *(next+from_vertex-1) : *iter;
124 blinepoint1 = *(next+from_vertex);
126 float width0 = blinepoint0.get_width();
127 float width1 = blinepoint1.get_width();
129 return Real((width0 + (amount-from_vertex) * (width1-width0)) * scale);
133 ValueNode_BLineCalcWidth::operator()(Time t)const
135 Real amount((*amount_)(t).get(Real()));
136 return (*this)(t, amount);
140 ValueNode_BLineCalcWidth::get_name()const
142 return "blinecalcwidth";
146 ValueNode_BLineCalcWidth::get_local_name()const
148 return _("BLine Width");
152 ValueNode_BLineCalcWidth::set_link_vfunc(int i,ValueNode::Handle value)
154 assert(i>=0 && i<link_count());
158 case 0: CHECK_TYPE_AND_SET_VALUE(bline_, ValueBase::TYPE_LIST);
159 case 1: CHECK_TYPE_AND_SET_VALUE(loop_, ValueBase::TYPE_BOOL);
160 case 2: CHECK_TYPE_AND_SET_VALUE(amount_, ValueBase::TYPE_REAL);
161 case 3: CHECK_TYPE_AND_SET_VALUE(scale_, ValueBase::TYPE_REAL);
166 ValueNode::LooseHandle
167 ValueNode_BLineCalcWidth::get_link_vfunc(int i)const
169 assert(i>=0 && i<link_count());
173 case 0: return bline_;
174 case 1: return loop_;
175 case 2: return amount_;
176 case 3: return scale_;
183 ValueNode_BLineCalcWidth::check_type(ValueBase::Type type)
185 return type==ValueBase::TYPE_REAL;
188 LinkableValueNode::Vocab
189 ValueNode_BLineCalcWidth::get_children_vocab_vfunc()const
191 if(children_vocab.size())
192 return children_vocab;
194 LinkableValueNode::Vocab ret;
196 ret.push_back(ParamDesc(ValueBase(),"bline")
197 .set_local_name(_("BLine"))
198 .set_description(_("The BLine where the width is linked to"))
201 ret.push_back(ParamDesc(ValueBase(),"loop")
202 .set_local_name(_("Loop"))
203 .set_description(_("When checked, the amount would loop"))
206 ret.push_back(ParamDesc(ValueBase(),"amount")
207 .set_local_name(_("Amount"))
208 .set_description(_("The position of the linked width on the BLine (0,1]"))
211 ret.push_back(ParamDesc(ValueBase(),"scale")
212 .set_local_name(_("Scale"))
213 .set_description(_("Scale of the width"))