Author: Carlos Lopez <genet...@gmail.com>
Date: Thu Jul 28 12:44:14 2011 +0200
Add new function to calculate the bline's length
---
synfig-core/src/synfig/valuenode_bline.cpp | 60 +++++++++++++++-------------
synfig-core/src/synfig/valuenode_bline.h | 3 +
2 files changed, 35 insertions(+), 28 deletions(-)
diff --git a/synfig-core/src/synfig/valuenode_bline.cpp
b/synfig-core/src/synfig/valuenode_bline.cpp
index 699d9e0..e46dd55 100644
--- a/synfig-core/src/synfig/valuenode_bline.cpp
+++ b/synfig-core/src/synfig/valuenode_bline.cpp
@@ -305,21 +305,10 @@ synfig::std_to_hom(const ValueBase &bline, Real pos, bool
index_loop, bool bline
if(pos == 0.0 || pos == 1.0)
return pos;
// Calculate the lengths and the total length
- Real tl=0, pl=0, l;
+ Real tl=0, pl=0;
std::vector<Real> lengths;
- vector<BLinePoint>::const_iterator iter, next(list.begin());
- iter = bline_loop ? --list.end() : next++;
- for(;next!=list.end(); next++)
- {
- blinepoint0 = *iter;
- blinepoint1 = *next;
- etl::hermite<Vector> curve(blinepoint0.get_vertex(),
blinepoint1.get_vertex(),
-
blinepoint0.get_tangent2(), blinepoint1.get_tangent1());
- l=curve.length();
- tl+=l;
- lengths.push_back(l);
- iter=next;
- }
+ vector<BLinePoint>::const_iterator iter, next;
+ tl=bline_length(bline, bline_loop, &lengths);
// If the total length of the bline is zero return pos
if(tl==0.0) return pos;
from_vertex = int(pos*size);
@@ -364,21 +353,10 @@ synfig::hom_to_std(const ValueBase &bline, Real pos, bool
index_loop, bool bline
if(pos == 0.0 || pos == 1.0)
return pos;
// Calculate the lengths and the total length
- Real tl(0), pl(0), mpl, bl, l;
+ Real tl(0), pl(0), mpl, bl;
std::vector<Real> lengths;
- vector<BLinePoint>::const_iterator iter, next(list.begin());
- iter = bline_loop ? --list.end() : next++;
- for(;next!=list.end(); next++)
- {
- blinepoint0 = *iter;
- blinepoint1 = *next;
- etl::hermite<Vector> curve(blinepoint0.get_vertex(),
blinepoint1.get_vertex(),
-
blinepoint0.get_tangent2(), blinepoint1.get_tangent1());
- l=curve.length();
- tl+=l;
- lengths.push_back(l);
- iter=next;
- }
+ vector<BLinePoint>::const_iterator iter, next;
+ tl=bline_length(bline, bline_loop,&lengths);
// Calculate the my partial length (the length where pos is)
mpl=pos*tl;
next=list.begin();
@@ -443,6 +421,32 @@ synfig::hom_to_std(const ValueBase &bline, Real pos, bool
index_loop, bool bline
// and return it
return Real(from_vertex + sn)/size;
}
+
+Real
+synfig::bline_length(const ValueBase &bline, bool bline_loop,
std::vector<Real> *lengths)
+{
+ BLinePoint blinepoint0, blinepoint1;
+ const std::vector<BLinePoint>
list(bline.get_list().begin(),bline.get_list().end());
+ int size(list.size());
+ if(!bline_loop) size--;
+ if(size < 1) return Real();
+ // Calculate the lengths and the total length
+ Real tl(0), l;
+ vector<BLinePoint>::const_iterator iter, next(list.begin());
+ iter = bline_loop ? --list.end() : next++;
+ for(;next!=list.end(); next++)
+ {
+ blinepoint0 = *iter;
+ blinepoint1 = *next;
+ etl::hermite<Vector> curve(blinepoint0.get_vertex(),
blinepoint1.get_vertex(),
+
blinepoint0.get_tangent2(), blinepoint1.get_tangent1());
+ l=curve.length();
+ if(lengths) lengths->push_back(l);
+ tl+=l;
+ iter=next;
+ }
+ return tl;
+}
/* === M E T H O D S ======================================================= */
diff --git a/synfig-core/src/synfig/valuenode_bline.h
b/synfig-core/src/synfig/valuenode_bline.h
index 1bffbdb..44a395b 100644
--- a/synfig-core/src/synfig/valuenode_bline.h
+++ b/synfig-core/src/synfig/valuenode_bline.h
@@ -60,6 +60,9 @@ Real std_to_hom(const ValueBase &bline, Real pos, bool
index_loop, bool bline_lo
//! Converts from homogeneous to standard index
Real hom_to_std(const ValueBase &bline, Real pos, bool index_loop, bool
bline_loop);
+//! Returns the length of the bline
+Real bline_length(const ValueBase &bline, bool bline_loop, std::vector<Real>
*lengths);
+
/*! \class ValueNode_BLine
** \brief \writeme
------------------------------------------------------------------------------
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