Remove references to old intersection implementation.

Signed-off-by: Bård Skaflestad <Bard.Skaflestad@sintef.no>
This commit is contained in:
Jostein R. Natvig
2012-02-01 11:49:52 +00:00
committed by Bård Skaflestad
parent 08f1e2e3e6
commit ea6c01dd95

View File

@@ -358,18 +358,14 @@ void process_horizontal_faces(int **intersections,
pt holds coordinates to intersection between lines given by point
numbers L[0]-L[1] and L[2]-L[3].
*/
#define OLD_INTERSECTION 0
static void approximate_intersection_pt(int *L, double *c, double *pt)
{
double a;
double z0, z1, z2, z3;
#if OLD_INTERSECTION
#else
double b1, b2;
double x1, y1;
double x2, y2;
double z;
#endif
/* no intersection on pillars expected here! */
assert(L[0]!=L[2]);
@@ -387,12 +383,6 @@ static void approximate_intersection_pt(int *L, double *c, double *pt)
a = 0;
}
#if OLD_INTERSECTION
pt[0] = c[3*L[0]+0]* (1.0-a) + c[3*L[1]+0]* a;
pt[1] = c[3*L[0]+1]* (1.0-a) + c[3*L[1]+1]* a;
pt[2] = c[3*L[0]+2]* (1.0-a) + c[3*L[1]+2]* a;
#else
/* the corresponding z-coordinate is */
z = z0* (1.0-a) + z1* a;
@@ -409,14 +399,14 @@ static void approximate_intersection_pt(int *L, double *c, double *pt)
b2 = (z1-z)/(z1-z3);
x2 = c[3*L[1]+0]*b1 + c[3*L[3]+0]*b2;
y2 = c[3*L[1]+1]*b1 + c[3*L[3]+1]*b2;
/* horizontal lines are by definition ON the bilinear surface
spanned by L0, L1, L2 and L3. find point (x, y, z) on
horizontal line between point (x1, y1, z) and (x2, y2, z).*/
pt[0] = x1* (1.0-a) + x2* a;
pt[1] = y1* (1.0-a) + y2* a;
pt[2] = z;
#endif
}
/*-----------------------------------------------------------------