1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/liberebus/src/bvol.cc	Sun Apr 27 16:02:47 2014 +0300
     1.3 @@ -0,0 +1,38 @@
     1.4 +#include "bvol.h"
     1.5 +
     1.6 +bool AABox::intersect(const Ray &ray) const
     1.7 +{
     1.8 +	Vector3 param[2] = {vmin, vmax};
     1.9 +	Vector3 inv_dir(1.0 / ray.dir.x, 1.0 / ray.dir.y, 1.0 / ray.dir.z);
    1.10 +	int sign[3] = {inv_dir.x < 0, inv_dir.y < 0, inv_dir.z < 0};
    1.11 +
    1.12 +	float tmin = (param[sign[0]].x - ray.origin.x) * inv_dir.x;
    1.13 +	float tmax = (param[1 - sign[0]].x - ray.origin.x) * inv_dir.x;
    1.14 +	float tymin = (param[sign[1]].y - ray.origin.y) * inv_dir.y;
    1.15 +	float tymax = (param[1 - sign[1]].y - ray.origin.y) * inv_dir.y;
    1.16 +
    1.17 +	if(tmin > tymax || tymin > tmax) {
    1.18 +		return false;
    1.19 +	}
    1.20 +	if(tymin > tmin) {
    1.21 +		tmin = tymin;
    1.22 +	}
    1.23 +	if(tymax < tmax) {
    1.24 +		tmax = tymax;
    1.25 +	}
    1.26 +
    1.27 +	float tzmin = (param[sign[2]].z - ray.origin.z) * inv_dir.z;
    1.28 +	float tzmax = (param[1 - sign[2]].z - ray.origin.z) * inv_dir.z;
    1.29 +
    1.30 +	if(tmin > tzmax || tzmin > tmax) {
    1.31 +		return false;
    1.32 +	}
    1.33 +	if(tzmin > tmin) {
    1.34 +		tmin = tzmin;
    1.35 +	}
    1.36 +	if(tzmax < tmax) {
    1.37 +		tmax = tzmax;
    1.38 +	}
    1.39 +
    1.40 +	return true;
    1.41 +}
    1.42 \ No newline at end of file