|
public static IntersectionFactorRay ( |
||
| start1 | ||
| end1 | ||
| start2 | ||
| end2 | ||
| return | float | |
public static float IntersectionFactorRay (Int3 start1, Int3 end1, Int3 start2, Int3 end2) {
Int3 dir1 = end1-start1;
Int3 dir2 = end2-start2;
int den = dir2.z*dir1.x - dir2.x * dir1.z;
if (den == 0) {
return float.NaN;
}
int nom = dir2.x*(start1.z-start2.z)- dir2.z*(start1.x-start2.x);
int nom2 = dir1.x*(start1.z-start2.z) - dir1.z * (start1.x - start2.x);
//if ((nom2 < 0) ^ (den < 0) && nom2 != 0) return float.NaN;
if ((float)nom2/den < 0) {
return float.NaN;
}
return (float)nom/den;
}