【转帖】hatching angle in mirrored inserts
 

hatching angle in mirrored inserts
hatching angle in mirrored inserts
hi,
does anybody know how to calculate the hatching angle as a part of mirrored insert of block. we import dxf-hatches in our cad and we calc the angles so:
angle = oddbblockreference::rotation() + oddbhatch:atternangle() + odhatchpatternline::m_dlineangle
it works fine while the inserts isn't mirrored. in mirrored inserts is the scalefactor x negative. is it sign of mirror? how we have to caculate the real angles? ans is not the angle dependent of mirror-axis?
thank you in advance
heinz
besides rotation and mirrored scale block reference's normal may effect the actual hatching angle. even if all geometry is in xy plane normal can be (0,0,-1).
reliable method is to take vector rotated by some angle, transform it matrix (oddbblockreference::blocktransform()) and to determine it's angle.
btw, hatch has method to get pattern definition which is already scaled and rotated by hatch's scale and rotation.
sergey slezkin