Vector rayColour(Scene *s, Ray *r) {
Vector ret;
if ((*r).recursionDepth++ < RECURSELIMIT) {
//printf("\nrecurse %d",(*r).recursionDepth);
Intersection intersections[(*s).objectsSize];
Intersection first;
int i;
Vector pntTime, nat;
for (i=0; i<(*s).objectsSize; i++){
ObjectRel objectrel = (*s).objects[i];
(intersections[i]) = initIntersection(objectrel.sphere,
intersectionTime((*s).objects[i].sphere,(*r)),
(*s).objects[i].surface);
}
first = firstIntersection(intersections, (*s).objectsSize);
if (first.t == 9999999) {
ret.x = 0;
ret.y = 0;
ret.z = 0;
} else {
pntTime = pointAtTime((*r), first.t);
nat = normalAt(first.o, pntTime);
//printf("lambert: %f\n", first.s.lambertCoefficient);
ret = colorAt(&first.s, s, (*r), &pntTime, nat );
}
} else {
ret.x = 0;
ret.y = 0;
ret.z = 0;
}
return ret;
}
Spline2f Spline2f::offsetPath( float distance )
{
Spline2f offsetSpline;
int nControlPoints = numControlPoints();
float delta = 1.f / ( nControlPoints - 1 );
for( int i = 0; i < nControlPoints; ++i )
{
float t = i * delta;
Vector2f controlPoint = getControlPoint( i );
Vector2f normalAtControlPoint = normalAt( t ).normalized();
offsetSpline.appendControlPoint( controlPoint + distance * normalAtControlPoint );
}
return offsetSpline;
}
