added support for .obj objects within the floorplan

include objects within navmesh calculation
include objects within 3d mesh generation
minor changes/fixes

geo/Triangle3.h

@@ -34,6 +34,18 @@ public:
 	Triangle3 operator - (const Point3 o) const {
 		return Triangle3(p1-o, p2-o, p3-o);
 	}
+	Triangle3& operator += (const Point3 o) {
+		p1 += o;
+		p2 += o;
+		p3 += o;
+		return *this;
+	}
+	Triangle3& operator -= (const Point3 o) {
+		p1 -= o;
+		p2 -= o;
+		p3 -= o;
+		return *this;
+	}
 
 	Point3 getNormal() const {
 		return cross( p2-p1, p3-p1 ).normalized();
@@ -47,22 +59,22 @@ public:
 		const Point3 e2 = p3-p1;
 
 		const Point3 h = cross(ray.dir, e2);
-		const float a = dot(e1, h);
+		const double a = dot(e1, h);
 
 		if (a > -0.00001 && a < 0.00001) {return false;}
 
-		const float f = 1/a;
+		const double f = 1/a;
 
 		const Point3 s = ray.start - p1;
-		const float u = f * dot(s,h);
+		const double u = f * dot(s,h);
 
 		if (u < 0.0 || u > 1.0) {return false;}
 
 		const Point3 q = cross(s, e1);
-		const float v = f * dot(ray.dir, q);
+		const double v = f * dot(ray.dir, q);
 
 		if (v < 0.0 || u + v > 1.0) {return false;}
-		const float t = f * dot(e2,q);
+		const double t = f * dot(e2,q);
 
 
 		if (t > 0.00001) {