MedicalVisualization
Edge Intersection with C++
‹ Iso Line Edge Intersection | ● | Marching Triangles Algorithm ›
With C++ we use the v3d.h vector header as part of the frame work to represent 3D vectors as C++ object.
#include "v3d.h"
The vector header also provides overloaded vector operators +, - and *. For example the addition of two vectors c=a+b is written as:
v3d a(1,0,0),b(0,1,0);
v3d c=a+b;
v3d c=a+b;
The intersection point of an iso line for the iso value v with an edge given by the endpoints x1 and x2 and the respective scalar values s1 and s2 is written as follows:
v3d x1,x2;
double s1,s2;
double w = (v-s1)/(s2-s1);
v3d p = (1-w)*x1 + w*x2;
double s1,s2;
double w = (v-s1)/(s2-s1);
v3d p = (1-w)*x1 + w*x2;
‹ Iso Line Edge Intersection | ● | Marching Triangles Algorithm ›