synfig-core/trunk/src/synfig/valuenode_subtract.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_subtract.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "general.h"
  33 #include "valuenode_subtract.h"
  34 #include "valuenode_const.h"
  35 #include <stdexcept>
  36 #include "color.h"
  37 #include "vector.h"
  38 #include "angle.h"
  39 #include "real.h"
  40
  41 #endif
  42
  43 /* === U S I N G =========================================================== */
  44
  45 using namespace std;
  46 using namespace etl;
  47 using namespace synfig;
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 /* === G L O B A L S ======================================================= */
  52
  53 /* === P R O C E D U R E S ================================================= */
  54
  55 /* === M E T H O D S ======================================================= */
  56
  57 synfig::ValueNode_Subtract::ValueNode_Subtract():LinkableValueNode(synfig::ValueBase::TYPE_NIL)
  58 {
  59         set_scalar(1.0);
  60 }
  61
  62 LinkableValueNode*
  63 ValueNode_Subtract::create_new()const
  64 {
  65         return new ValueNode_Subtract();
  66 }
  67
  68 ValueNode_Subtract*
  69 ValueNode_Subtract::create(const ValueBase& x)
  70 {
  71         ValueBase::Type id(x.get_type());
  72
  73         ValueNode_Subtract* value_node=new ValueNode_Subtract();
  74         switch(id)
  75         {
  76         case ValueBase::TYPE_NIL:
  77                 return value_node;
  78         case ValueBase::TYPE_COLOR:
  79                 value_node->set_link("lhs",ValueNode_Const::create(x.get(Color())));
  80                 value_node->set_link("rhs",ValueNode_Const::create(Color(0,0,0,0)));
  81                 break;
  82         case ValueBase::TYPE_ANGLE:
  83         case ValueBase::TYPE_INTEGER:
  84         case ValueBase::TYPE_REAL:
  85         case ValueBase::TYPE_VECTOR:
  86                 value_node->set_link("lhs",ValueNode_Const::create(ValueBase(id)));
  87                 value_node->set_link("rhs",ValueNode_Const::create(ValueBase(id)));
  88                 break;
  89         default:
  90                 assert(0);
  91                 throw runtime_error("synfig::ValueNode_Subtract:Bad type "+ValueBase::type_name(id));
  92         }
  93
  94         assert(value_node->get_lhs()->get_type()==id);
  95         assert(value_node->get_rhs()->get_type()==id);
  96
  97         assert(value_node->get_type()==id);
  98
  99         return value_node;
 100 }
 101
 102 synfig::ValueNode_Subtract::~ValueNode_Subtract()
 103 {
 104         unlink_all();
 105 }
 106
 107 void
 108 ValueNode_Subtract::set_scalar(Real x)
 109 {
 110         set_link("scalar",ValueNode_Const::create(x));
 111 }
 112
 113 bool
 114 synfig::ValueNode_Subtract::set_scalar(ValueNode::Handle x)
 115 {
 116         if(x->get_type()!=ValueBase::TYPE_REAL&& !PlaceholderValueNode::Handle::cast_dynamic(x))
 117                 return false;
 118         scalar=x;
 119         return true;
 120 }
 121
 122 bool
 123 synfig::ValueNode_Subtract::set_lhs(ValueNode::Handle a)
 124 {
 125         ref_a=a;
 126
 127         if(PlaceholderValueNode::Handle::cast_dynamic(a))
 128                 return true;
 129
 130         if(!ref_a || !ref_b)
 131                 set_type(ValueBase::TYPE_NIL);
 132         else
 133         if(ref_a->get_type()==ValueBase::TYPE_ANGLE && ref_a->get_type()==ValueBase::TYPE_ANGLE)
 134                 set_type(ValueBase::TYPE_ANGLE);
 135         else
 136         if(ref_a->get_type()==ValueBase::TYPE_COLOR && ref_a->get_type()==ValueBase::TYPE_COLOR)
 137                 set_type(ValueBase::TYPE_COLOR);
 138         else
 139         if(ref_a->get_type()==ValueBase::TYPE_INTEGER && ref_a->get_type()==ValueBase::TYPE_INTEGER)
 140                 set_type(ValueBase::TYPE_INTEGER);
 141         else
 142         if(ref_a->get_type()==ValueBase::TYPE_REAL && ref_a->get_type()==ValueBase::TYPE_REAL)
 143                 set_type(ValueBase::TYPE_REAL);
 144         else
 145         if(ref_a->get_type()==ValueBase::TYPE_VECTOR && ref_a->get_type()==ValueBase::TYPE_VECTOR)
 146                 set_type(ValueBase::TYPE_VECTOR);
 147         else
 148         {
 149                 synfig::warning(get_id()+":(set_a):"+strprintf(_("Types seem to be off for ValueNodes %s and %s"),ref_a->get_id().c_str(),ref_b->get_id().c_str()));
 150                 set_type(ValueBase::TYPE_NIL);
 151         }
 152
 153         return true;
 154 }
 155
 156 bool
 157 synfig::ValueNode_Subtract::set_rhs(ValueNode::Handle b)
 158 {
 159         ref_b=b;
 160
 161         if(PlaceholderValueNode::Handle::cast_dynamic(b))
 162                 return true;
 163
 164         if(!ref_a || !ref_b)
 165                 set_type(ValueBase::TYPE_NIL);
 166         else
 167         if(ref_a->get_type()==ValueBase::TYPE_ANGLE && ref_a->get_type()==ValueBase::TYPE_ANGLE)
 168                 set_type(ValueBase::TYPE_ANGLE);
 169         else
 170         if(ref_a->get_type()==ValueBase::TYPE_COLOR && ref_a->get_type()==ValueBase::TYPE_COLOR)
 171                 set_type(ValueBase::TYPE_COLOR);
 172         else
 173         if(ref_a->get_type()==ValueBase::TYPE_INTEGER && ref_a->get_type()==ValueBase::TYPE_INTEGER)
 174                 set_type(ValueBase::TYPE_INTEGER);
 175         else
 176         if(ref_a->get_type()==ValueBase::TYPE_REAL && ref_a->get_type()==ValueBase::TYPE_REAL)
 177                 set_type(ValueBase::TYPE_REAL);
 178         else
 179         if(ref_a->get_type()==ValueBase::TYPE_VECTOR && ref_a->get_type()==ValueBase::TYPE_VECTOR)
 180                 set_type(ValueBase::TYPE_VECTOR);
 181         else
 182         {
 183                 synfig::warning(get_id()+":(set_b):"+strprintf(_("Types seem to be off for ValueNodes %s and %s"),ref_a->get_id().c_str(),ref_b->get_id().c_str()));
 184                 set_type(ValueBase::TYPE_NIL);
 185         }
 186
 187         return true;
 188 }
 189
 190 synfig::ValueBase
 191 synfig::ValueNode_Subtract::operator()(Time t)const
 192 {
 193         if(!ref_a || !ref_b)
 194                 throw runtime_error(strprintf("ValueNode_Subtract: %s",_("One or both of my parameters aren't set!")));
 195         switch(get_type())
 196         {
 197         case ValueBase::TYPE_ANGLE:
 198                 return ((*ref_a)(t).get(Angle())-(*ref_b)(t).get(Angle()))*(*scalar)(t).get(Real());
 199         case ValueBase::TYPE_COLOR:
 200                 return ((*ref_a)(t).get(Color())-(*ref_b)(t).get(Color()))*(*scalar)(t).get(Real());
 201         case ValueBase::TYPE_INTEGER:
 202         {
 203                 Real ret = ((*ref_a)(t).get(int())-(*ref_b)(t).get(int()))*(*scalar)(t).get(Real()) + 0.5f;
 204                 if (ret < 0) return static_cast<int>(ret-1);
 205                 return static_cast<int>(ret);
 206         }
 207         case ValueBase::TYPE_REAL:
 208                 return ((*ref_a)(t).get(Vector::value_type())-(*ref_b)(t).get(Vector::value_type()))*(*scalar)(t).get(Real());
 209         case ValueBase::TYPE_VECTOR:
 210                 return ((*ref_a)(t).get(Vector())-(*ref_b)(t).get(Vector()))*(*scalar)(t).get(Real());
 211         default:
 212                 assert(0);
 213                 break;
 214         }
 215         return ValueBase();
 216 }
 217
 218 bool
 219 ValueNode_Subtract::set_link_vfunc(int i,ValueNode::Handle x)
 220 {
 221         assert(i>=0 && i<3);
 222         switch(i)
 223         {
 224                 case 0:
 225                         if(set_lhs(x)) { signal_child_changed()(i);signal_value_changed()(); return true; }
 226                         else { return false; }
 227                 case 1:
 228                         if(set_rhs(x)) { signal_child_changed()(i);signal_value_changed()(); return true; }
 229                         else { return false; }
 230                 case 2:
 231                         scalar=x;
 232                         signal_child_changed()(i);signal_value_changed()();
 233                         return true;
 234         }
 235
 236         return false;
 237 }
 238
 239 ValueNode::LooseHandle
 240 ValueNode_Subtract::get_link_vfunc(int i)const
 241 {
 242         assert(i>=0 && i<3);
 243         switch(i)
 244         {
 245                 case 0:
 246                         return ref_a;
 247                 case 1:
 248                         return ref_b;
 249                 case 2:
 250                         return scalar;
 251         }
 252         return 0;
 253 }
 254
 255 int
 256 ValueNode_Subtract::link_count()const
 257 {
 258         return 3;
 259 }
 260
 261 String
 262 ValueNode_Subtract::link_local_name(int i)const
 263 {
 264         assert(i>=0 && i<3);
 265         switch(i)
 266         {
 267                 case 0:
 268                         return _("LHS");
 269                 case 1:
 270                         return _("RHS");
 271                 case 2:
 272                         return _("Scalar");
 273                 default:
 274                         return String();
 275         }
 276 }
 277
 278 String
 279 ValueNode_Subtract::link_name(int i)const
 280 {
 281         assert(i>=0 && i<3);
 282         switch(i)
 283         {
 284                 case 0:
 285                         return "lhs";
 286                 case 1:
 287                         return "rhs";
 288                 case 2:
 289                         return "scalar";
 290                 default:
 291                         return String();
 292         }
 293 }
 294
 295 int
 296 ValueNode_Subtract::get_link_index_from_name(const String &name)const
 297 {
 298         if(name=="lhs")
 299                 return 0;
 300         if(name=="rhs")
 301                 return 1;
 302         if(name=="scalar")
 303                 return 2;
 304         throw Exception::BadLinkName(name);
 305 }
 306
 307 String
 308 ValueNode_Subtract::get_name()const
 309 {
 310         return "subtract";
 311 }
 312
 313 String
 314 ValueNode_Subtract::get_local_name()const
 315 {
 316         return _("Subtract");
 317 }
 318
 319 bool
 320 ValueNode_Subtract::check_type(ValueBase::Type type)
 321 {
 322         return type==ValueBase::TYPE_ANGLE
 323                 || type==ValueBase::TYPE_COLOR
 324                 || type==ValueBase::TYPE_INTEGER
 325                 || type==ValueBase::TYPE_REAL
 326                 || type==ValueBase::TYPE_VECTOR;
 327 }