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Little optimization of the NURBS curves algorithm

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This commit is contained in:
Hombre 2010-10-16 00:03:15 +02:00
parent a557b68dfb
commit 04f101d24f
1 changed files with 5 additions and 1 deletions
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6
rtengine/curves.cc
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@ -120,6 +120,8 @@ void Curve::NURBS_set () {
int k = 0; int k = 0;
for (int i = 0; i < N-1;) { for (int i = 0; i < N-1;) {
double length; double length;
double dx;
double dy;
// first point (on the curve) // first point (on the curve)
if (!i) { if (!i) {
@ -146,7 +148,9 @@ void Curve::NURBS_set () {
sc_x[j] = (x[i-1] + x[i]) / 2.; sc_x[j] = (x[i-1] + x[i]) / 2.;
sc_y[j] = (y[i-1] + y[i]) / 2.; sc_y[j] = (y[i-1] + y[i]) / 2.;
} }
length += sqrt(pow(sc_x[j] - sc_x[j-1],2) + pow(sc_y[j] - sc_y[j-1],2)); dx = sc_x[j] - sc_x[j-1];
dy = sc_y[j] - sc_y[j-1];
length += sqrt(dx*dx + dy*dy);
j++; j++;
// Storing the length of all sub-curves and the total length (to have a better distribution // Storing the length of all sub-curves and the total length (to have a better distribution