Use LinkableValueNode members functions when possible in the derived valuenodes.
[synfig.git] / synfig-core / src / synfig / valuenode_subtract.cpp
1 /* === S Y N F I G ========================================================= */
2 /*!     \file valuenode_subtract.cpp
3 **      \brief Implementation of the "Subtract" valuenode conversion.
4 **
5 **      $Id$
6 **
7 **      \legal
8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 **      Copyright (c) 2007, 2008 Chris Moore
10 **
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.
15 **
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.
20 **      \endlegal
21 */
22 /* ========================================================================= */
23
24 /* === H E A D E R S ======================================================= */
25
26 #ifdef USING_PCH
27 #       include "pch.h"
28 #else
29 #ifdef HAVE_CONFIG_H
30 #       include <config.h>
31 #endif
32
33 #include "general.h"
34 #include "valuenode_subtract.h"
35 #include "valuenode_const.h"
36 #include <stdexcept>
37 #include "color.h"
38 #include "gradient.h"
39 #include "vector.h"
40 #include "angle.h"
41 #include "real.h"
42 #include <ETL/misc>
43
44 #endif
45
46 /* === U S I N G =========================================================== */
47
48 using namespace std;
49 using namespace etl;
50 using namespace synfig;
51
52 /* === M A C R O S ========================================================= */
53
54 /* === G L O B A L S ======================================================= */
55
56 /* === P R O C E D U R E S ================================================= */
57
58 /* === M E T H O D S ======================================================= */
59
60 synfig::ValueNode_Subtract::ValueNode_Subtract(const ValueBase &value):
61         LinkableValueNode(value.get_type())
62 {
63         Vocab ret(get_children_vocab());
64         set_children_vocab(ret);
65         set_link("scalar",ValueNode_Const::create(Real(1.0)));
66         ValueBase::Type id(value.get_type());
67
68         switch(id)
69         {
70         case ValueBase::TYPE_ANGLE:
71                 set_link("lhs",ValueNode_Const::create(value.get(Angle())));
72                 set_link("rhs",ValueNode_Const::create(Angle::deg(0)));
73                 break;
74         case ValueBase::TYPE_COLOR:
75                 set_link("lhs",ValueNode_Const::create(value.get(Color())));
76                 set_link("rhs",ValueNode_Const::create(Color(0,0,0,0)));
77                 break;
78         case ValueBase::TYPE_GRADIENT:
79                 set_link("lhs",ValueNode_Const::create(value.get(Gradient())));
80                 set_link("rhs",ValueNode_Const::create(Gradient()));
81                 break;
82         case ValueBase::TYPE_INTEGER:
83                 set_link("lhs",ValueNode_Const::create(value.get(int())));
84                 set_link("rhs",ValueNode_Const::create(int(0)));
85                 break;
86         case ValueBase::TYPE_REAL:
87                 set_link("lhs",ValueNode_Const::create(value.get(Real())));
88                 set_link("rhs",ValueNode_Const::create(Real(0)));
89                 break;
90         case ValueBase::TYPE_TIME:
91                 set_link("lhs",ValueNode_Const::create(value.get(Time())));
92                 set_link("rhs",ValueNode_Const::create(Time(0)));
93                 break;
94         case ValueBase::TYPE_VECTOR:
95                 set_link("lhs",ValueNode_Const::create(value.get(Vector())));
96                 set_link("rhs",ValueNode_Const::create(Vector(0,0)));
97                 break;
98         default:
99                 assert(0);
100                 throw runtime_error(get_local_name()+_(":Bad type ")+ValueBase::type_local_name(id));
101         }
102
103         assert(ref_a->get_type()==id);
104         assert(ref_b->get_type()==id);
105         assert(get_type()==id);
106 }
107
108 LinkableValueNode*
109 ValueNode_Subtract::create_new()const
110 {
111         return new ValueNode_Subtract(get_type());
112 }
113
114 ValueNode_Subtract*
115 ValueNode_Subtract::create(const ValueBase& value)
116 {
117         return new ValueNode_Subtract(value);
118 }
119
120 synfig::ValueNode_Subtract::~ValueNode_Subtract()
121 {
122         unlink_all();
123 }
124
125 synfig::ValueBase
126 synfig::ValueNode_Subtract::operator()(Time t)const
127 {
128         if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
129                 printf("%s:%d operator()\n", __FILE__, __LINE__);
130
131         if(!ref_a || !ref_b)
132                 throw runtime_error(strprintf("ValueNode_Subtract: %s",_("One or both of my parameters aren't set!")));
133         switch(get_type())
134         {
135         case ValueBase::TYPE_ANGLE:
136                 return ((*ref_a)(t).get(Angle())-(*ref_b)(t).get(Angle()))*(*scalar)(t).get(Real());
137         case ValueBase::TYPE_COLOR:
138                 return ((*ref_a)(t).get(Color())-(*ref_b)(t).get(Color()))*(*scalar)(t).get(Real());
139         case ValueBase::TYPE_GRADIENT:
140                 return ((*ref_a)(t).get(Gradient())-(*ref_b)(t).get(Gradient()))*(*scalar)(t).get(Real());
141         case ValueBase::TYPE_INTEGER:
142                 return round_to_int(((*ref_a)(t).get(int())-(*ref_b)(t).get(int()))*(*scalar)(t).get(Real()));
143         case ValueBase::TYPE_REAL:
144                 return ((*ref_a)(t).get(Vector::value_type())-(*ref_b)(t).get(Vector::value_type()))*(*scalar)(t).get(Real());
145         case ValueBase::TYPE_TIME:
146                 return ((*ref_a)(t).get(Time())-(*ref_b)(t).get(Time()))*(*scalar)(t).get(Real());
147         case ValueBase::TYPE_VECTOR:
148                 return ((*ref_a)(t).get(Vector())-(*ref_b)(t).get(Vector()))*(*scalar)(t).get(Real());
149         default:
150                 assert(0);
151                 break;
152         }
153         return ValueBase();
154 }
155
156 bool
157 ValueNode_Subtract::set_link_vfunc(int i,ValueNode::Handle value)
158 {
159         assert(i>=0 && i<link_count());
160
161         switch(i)
162         {
163         case 0: CHECK_TYPE_AND_SET_VALUE(ref_a,  get_type());
164         case 1: CHECK_TYPE_AND_SET_VALUE(ref_b,  get_type());
165         case 2: CHECK_TYPE_AND_SET_VALUE(scalar, ValueBase::TYPE_REAL);
166         }
167         return false;
168 }
169
170 ValueNode::LooseHandle
171 ValueNode_Subtract::get_link_vfunc(int i)const
172 {
173         assert(i>=0 && i<link_count());
174
175         switch(i)
176         {
177                 case 0: return ref_a;
178                 case 1: return ref_b;
179                 case 2: return scalar;
180                 default: return 0;
181         }
182 }
183
184 String
185 ValueNode_Subtract::get_name()const
186 {
187         return "subtract";
188 }
189
190 String
191 ValueNode_Subtract::get_local_name()const
192 {
193         return _("Subtract");
194 }
195
196 bool
197 ValueNode_Subtract::check_type(ValueBase::Type type)
198 {
199         return type==ValueBase::TYPE_ANGLE
200                 || type==ValueBase::TYPE_COLOR
201                 || type==ValueBase::TYPE_GRADIENT
202                 || type==ValueBase::TYPE_INTEGER
203                 || type==ValueBase::TYPE_REAL
204                 || type==ValueBase::TYPE_TIME
205                 || type==ValueBase::TYPE_VECTOR;
206 }
207
208 LinkableValueNode::Vocab
209 ValueNode_Subtract::get_children_vocab_vfunc()const
210 {
211         if(children_vocab.size())
212                 return children_vocab;
213
214         LinkableValueNode::Vocab ret;
215
216         ret.push_back(ParamDesc(ValueBase(),"lhs")
217                 .set_local_name(_("LHS"))
218                 .set_description(_("Left Hand Side of the subtraction"))
219         );
220
221         ret.push_back(ParamDesc(ValueBase(),"rhs")
222                 .set_local_name(_("RHS"))
223                 .set_description(_("Right Hand Side of the subtraction"))
224         );
225
226                 ret.push_back(ParamDesc(ValueBase(),"scalar")
227                 .set_local_name(_("Scalar"))
228                 .set_description(_("Value that multiplies the subtraction"))
229         );
230
231         return ret;
232 }