rayIntersect method
Implementation
OctreeRay? rayIntersect(Ray ray) {
if(ray.direction.length() == 0) return null;
List<Triangle> triangles = getRayTriangles(ray, []);
late Triangle triangle;
late Vector3 position;
double distance = 1e100;
Vector3? result;
for (int i = 0; i < triangles.length; i ++ ) {
result = ray.intersectTriangle( triangles[ i ].a, triangles[ i ].b, triangles[ i ].c, true, _v1 );
if(result != null){
double newdistance = result.sub( ray.origin ).length();
if ( distance > newdistance ) {
position = result.clone().add( ray.origin );
distance = newdistance;
triangle = triangles[ i ];
}
}
}
return distance < 1e100 ? OctreeRay(distance: distance, triangle: triangle, position: position) : null;
}