synfig-core/trunk/src/modules/lyr_std/insideout.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file insideout.cpp
   3 **      \brief Implementation of the "Inside Out" layer
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007 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 ** === N O T E S ===========================================================
  23 **
  24 ** ========================================================================= */
  25
  26 /* === H E A D E R S ======================================================= */
  27
  28 #ifdef USING_PCH
  29 #       include "pch.h"
  30 #else
  31 #ifdef HAVE_CONFIG_H
  32 #       include <config.h>
  33 #endif
  34
  35 #include "insideout.h"
  36
  37 #include <synfig/string.h>
  38 #include <synfig/time.h>
  39 #include <synfig/context.h>
  40 #include <synfig/paramdesc.h>
  41 #include <synfig/renddesc.h>
  42 #include <synfig/surface.h>
  43 #include <synfig/value.h>
  44 #include <synfig/valuenode.h>
  45 #include <synfig/transform.h>
  46
  47 #endif
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 /* === G L O B A L S ======================================================= */
  52
  53 SYNFIG_LAYER_INIT(InsideOut);
  54 SYNFIG_LAYER_SET_NAME(InsideOut,"inside_out");
  55 SYNFIG_LAYER_SET_LOCAL_NAME(InsideOut,N_("Inside Out"));
  56 SYNFIG_LAYER_SET_CATEGORY(InsideOut,N_("Distortions"));
  57 SYNFIG_LAYER_SET_VERSION(InsideOut,"0.1");
  58 SYNFIG_LAYER_SET_CVS_ID(InsideOut,"$Id$");
  59
  60 /* === P R O C E D U R E S ================================================= */
  61
  62 /* === M E T H O D S ======================================================= */
  63
  64 InsideOut::InsideOut():
  65         origin(0,0)
  66 {
  67 }
  68
  69 bool
  70 InsideOut::set_param(const String & param, const ValueBase &value)
  71 {
  72         IMPORT(origin);
  73         return false;
  74 }
  75
  76 ValueBase
  77 InsideOut::get_param(const String & param)const
  78 {
  79         EXPORT(origin);
  80
  81         EXPORT_NAME();
  82         EXPORT_VERSION();
  83
  84         return ValueBase();
  85 }
  86
  87 synfig::Layer::Handle
  88 InsideOut::hit_check(synfig::Context context, const synfig::Point &p)const
  89 {
  90         Point pos(p-origin);
  91         Real inv_mag=pos.inv_mag();
  92         Point invpos(pos*inv_mag*inv_mag);
  93         return context.hit_check(invpos+origin);
  94 }
  95
  96 Color
  97 InsideOut::get_color(Context context, const Point &p)const
  98 {
  99         Point pos(p-origin);
 100         Real inv_mag=pos.inv_mag();
 101         Point invpos(pos*inv_mag*inv_mag);
 102         return context.get_color(invpos+origin);
 103 }
 104
 105 class InsideOut_Trans : public Transform
 106 {
 107         etl::handle<const InsideOut> layer;
 108 public:
 109         InsideOut_Trans(const InsideOut* x):Transform(x->get_guid()),layer(x) { }
 110
 111         synfig::Vector perform(const synfig::Vector& x)const
 112         {
 113                 Point pos(x-layer->origin);
 114                 Real inv_mag=pos.inv_mag();
 115                 if(!isnan(inv_mag))
 116                         return (pos*(inv_mag*inv_mag)+layer->origin);
 117                 return x;
 118         }
 119
 120         synfig::Vector unperform(const synfig::Vector& x)const
 121         {
 122                 Point pos(x-layer->origin);
 123                 Real inv_mag=pos.inv_mag();
 124                 if(!isnan(inv_mag))
 125                         return (pos*(inv_mag*inv_mag)+layer->origin);
 126                 return x;
 127         }
 128 };
 129 etl::handle<Transform>
 130 InsideOut::get_transform()const
 131 {
 132         return new InsideOut_Trans(this);
 133 }
 134
 135 Layer::Vocab
 136 InsideOut::get_param_vocab()const
 137 {
 138         Layer::Vocab ret;
 139
 140         ret.push_back(ParamDesc("origin")
 141                 .set_local_name(_("Origin"))
 142                 .set_description(_("Defines the where the center will be"))
 143         );
 144
 145         return ret;
 146 }