dwgBuffer::getExtrusion

gistfile1.cpp

void dwgBuffer::getExtrusion(DRW_Coord *ext)
{

    /*
    Bit Extrusion
    
    For R13-R14 this is 3BD. 
    We are asserting that the version is not R13-R14; this values should
    be read by the user
    */
    
    /*
    For R2000, this is a single bit, followed optionally
    by 3BD.*/
    duint8 def_val = getBit();
    if ( def_val )
    {  /* If the single bit is 1, the extrusion value is assumed to be 0,0,1 and
	no explicit extrusion is stored. */
		ext->x = 0;
		ext->y = 0;
		ext->z = 1;
    }
    else
    { /* If the single bit is 0, then it will be followed by 3BD. */
		ext->x = getBitDouble();
		ext->y = getBitDouble();
		ext->z = getBitDouble();
    }
}