Cube  Diff

#define PIXELTAB (VIRTW / 12)

#define PI (3.1415927f)
#define PI2 (2 * PI)

// simplistic vector ops
#define dotprod(u, v) ((u).x * (v).x + (u).y * (v).y + (u).z * (v).z)
#define vmul(u, f)                                                   \
#define vmul(u, f) u = OFMultiplyVector3D(u, OFMakeVector3D(f, f, f))
	{                                                            \
		OFVector3D tmp_ = u;                                 \
		float tmp2_ = f;                                     \
		u = OFMakeVector3D(                                  \
		    tmp_.x * tmp2_, tmp_.y * tmp2_, tmp_.z * tmp2_); \
	}
#define vdiv(u, f)                                                   \
#define vdiv(u, f) u = OFDivideVector3D(u, OFMakeVector3D(f, f, f))
	{                                                            \
		OFVector3D tmp_ = u;                                 \
		float tmp2_ = f;                                     \
		u = OFMakeVector3D(                                  \
		    tmp_.x / tmp2_, tmp_.y / tmp2_, tmp_.z / tmp2_); \
	}
#define vadd(u, v)                                                   \
#define vadd(u, v) u = OFAddVector3D(u, v)
	{                                                            \
		OFVector3D tmp_ = u;                                 \
		u = OFMakeVector3D(                                  \
		    tmp_.x + (v).x, tmp_.y + (v).y, tmp_.z + (v).z); \
	}
#define vsub(u, v)                                                   \
#define vsub(u, v) u = OFSubtractVector3D(u, v)
	{                                                            \
		OFVector3D tmp_ = u;                                 \
		u = OFMakeVector3D(                                  \
		    tmp_.x - (v).x, tmp_.y - (v).y, tmp_.z - (v).z); \
	}
#define vdist(d, v, e, s) \
	OFVector3D v = s; \
	vsub(v, e);       \
	float d = (float)sqrt(dotprod(v, v));
#define vreject(v, u, max)                                 \
	((v).x > (u).x + (max) || (v).x < (u).x - (max) || \
	    (v).y > (u).y + (max) || (v).y < (u).y - (max))