--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file valuenode_blinecalctangent.cpp
+** \brief Implementation of the "BLine Tangent" valuenode conversion.
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007, 2008 Chris Moore
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+# include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "valuenode_blinecalctangent.h"
+#include "valuenode_bline.h"
+#include "valuenode_const.h"
+#include "valuenode_composite.h"
+#include "general.h"
+#include "exception.h"
+#include <ETL/hermite>
+#include <ETL/calculus>
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+ValueNode_BLineCalcTangent::ValueNode_BLineCalcTangent(const ValueBase::Type &x):
+ LinkableValueNode(x)
+{
+ if(x!=ValueBase::TYPE_ANGLE && x!=ValueBase::TYPE_REAL && x!=ValueBase::TYPE_VECTOR)
+ throw Exception::BadType(ValueBase::type_local_name(x));
+
+ ValueNode_BLine* value_node(new ValueNode_BLine());
+ set_link("bline",value_node);
+ set_link("loop",ValueNode_Const::create(bool(false)));
+ set_link("amount",ValueNode_Const::create(Real(0.5)));
+ set_link("offset",ValueNode_Const::create(Angle::deg(0)));
+ set_link("scale",ValueNode_Const::create(Real(1.0)));
+ set_link("fixed_length",ValueNode_Const::create(bool(false)));
+}
+
+LinkableValueNode*
+ValueNode_BLineCalcTangent::create_new()const
+{
+ return new ValueNode_BLineCalcTangent(get_type());
+}
+
+ValueNode_BLineCalcTangent*
+ValueNode_BLineCalcTangent::create(const ValueBase &x)
+{
+ return new ValueNode_BLineCalcTangent(x.get_type());
+}
+
+ValueNode_BLineCalcTangent::~ValueNode_BLineCalcTangent()
+{
+ unlink_all();
+}
+
+ValueBase
+ValueNode_BLineCalcTangent::operator()(Time t, Real amount)const
+{
+ if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
+ printf("%s:%d operator()\n", __FILE__, __LINE__);
+
+ const std::vector<ValueBase> bline((*bline_)(t).get_list());
+ handle<ValueNode_BLine> bline_value_node(bline_);
+ const bool looped(bline_value_node->get_loop());
+ int size = bline.size(), from_vertex;
+ bool loop((*loop_)(t).get(bool()));
+ Angle offset((*offset_)(t).get(Angle()));
+ Real scale((*scale_)(t).get(Real()));
+ bool fixed_length((*fixed_length_)(t).get(bool()));
+ BLinePoint blinepoint0, blinepoint1;
+
+ if (!looped) size--;
+ if (size < 1)
+ switch (get_type())
+ {
+ case ValueBase::TYPE_ANGLE: return Angle();
+ case ValueBase::TYPE_REAL: return Real();
+ case ValueBase::TYPE_VECTOR: return Vector();
+ default: assert(0); return ValueBase();
+ }
+ if (loop)
+ {
+ amount = amount - int(amount);
+ if (amount < 0) amount++;
+ }
+ else
+ {
+ if (amount < 0) amount = 0;
+ if (amount > 1) amount = 1;
+ }
+
+ vector<ValueBase>::const_iterator iter, next(bline.begin());
+
+ iter = looped ? --bline.end() : next++;
+ amount = amount * size;
+ from_vertex = int(amount);
+ if (from_vertex > size-1) from_vertex = size-1;
+ blinepoint0 = from_vertex ? *(next+from_vertex-1) : *iter;
+ blinepoint1 = *(next+from_vertex);
+
+ etl::hermite<Vector> curve(blinepoint0.get_vertex(), blinepoint1.get_vertex(),
+ blinepoint0.get_tangent2(), blinepoint1.get_tangent1());
+ etl::derivative< etl::hermite<Vector> > deriv(curve);
+
+ switch (get_type())
+ {
+ case ValueBase::TYPE_ANGLE: return deriv(amount-from_vertex).angle() + offset;
+ case ValueBase::TYPE_REAL:
+ {
+ if (fixed_length) return scale;
+ return deriv(amount-from_vertex).mag() * scale;
+ }
+ case ValueBase::TYPE_VECTOR:
+ {
+ Vector tangent(deriv(amount-from_vertex));
+ Angle angle(tangent.angle() + offset);
+ Real mag = fixed_length ? scale : (tangent.mag() * scale);
+ return Vector(Angle::cos(angle).get()*mag,
+ Angle::sin(angle).get()*mag);
+ }
+ default: assert(0); return ValueBase();
+ }
+}
+
+ValueBase
+ValueNode_BLineCalcTangent::operator()(Time t)const
+{
+ Real amount((*amount_)(t).get(Real()));
+ return (*this)(t, amount);
+}
+
+String
+ValueNode_BLineCalcTangent::get_name()const
+{
+ return "blinecalctangent";
+}
+
+String
+ValueNode_BLineCalcTangent::get_local_name()const
+{
+ return _("BLine Tangent");
+}
+
+bool
+ValueNode_BLineCalcTangent::set_link_vfunc(int i,ValueNode::Handle value)
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: CHECK_TYPE_AND_SET_VALUE(bline_, ValueBase::TYPE_LIST);
+ case 1: CHECK_TYPE_AND_SET_VALUE(loop_, ValueBase::TYPE_BOOL);
+ case 2: CHECK_TYPE_AND_SET_VALUE(amount_, ValueBase::TYPE_REAL);
+ case 3: CHECK_TYPE_AND_SET_VALUE(offset_, ValueBase::TYPE_ANGLE);
+ case 4: CHECK_TYPE_AND_SET_VALUE(scale_, ValueBase::TYPE_REAL);
+ case 5: CHECK_TYPE_AND_SET_VALUE(fixed_length_, ValueBase::TYPE_BOOL);
+ }
+ return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_BLineCalcTangent::get_link_vfunc(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return bline_;
+ case 1: return loop_;
+ case 2: return amount_;
+ case 3: return offset_;
+ case 4: return scale_;
+ case 5: return fixed_length_;
+ }
+
+ return 0;
+}
+
+int
+ValueNode_BLineCalcTangent::link_count()const
+{
+ return 6;
+}
+
+String
+ValueNode_BLineCalcTangent::link_name(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return "bline";
+ case 1: return "loop";
+ case 2: return "amount";
+ case 3: return "offset";
+ case 4: return "scale";
+ case 5: return "fixed_length";
+ }
+ return String();
+}
+
+String
+ValueNode_BLineCalcTangent::link_local_name(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return _("BLine");
+ case 1: return _("Loop");
+ case 2: return _("Amount");
+ case 3: return _("Offset");
+ case 4: return _("Scale");
+ case 5: return _("Fixed Length");
+ }
+ return String();
+}
+
+int
+ValueNode_BLineCalcTangent::get_link_index_from_name(const String &name)const
+{
+ if (name=="bline") return 0;
+ if (name=="loop") return 1;
+ if (name=="amount") return 2;
+ if (name=="offset") return 3;
+ if (name=="scale") return 4;
+ if (name=="fixed_length") return 5;
+ throw Exception::BadLinkName(name);
+}
+
+bool
+ValueNode_BLineCalcTangent::check_type(ValueBase::Type type)
+{
+ return (type==ValueBase::TYPE_ANGLE ||
+ type==ValueBase::TYPE_REAL ||
+ type==ValueBase::TYPE_VECTOR);
+}
projects / synfig.git / blobdiff