perpendicular from point to plane |

Marek Dedecius | 12.2.2009 16:51 |

Daniel, You can very simply set the axis to or against the normal of the plane and then drag the solid along this axis. It is very simple and fast. Give it a try using the above options, which are available in the "3D Location" box . For example, use the options "X Axis to Normal" and the "Translate along X, Dynamic". Marek |

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## perpendicular from point to plane

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perpendicular from point to plane |

Daniel Barna | 12.2.2009 |

Hi, in 2D it is possible to select a point as 'perpendicular from another point to a given line' (which can be used for example to measure a distance between a point and a line). Is it possible in 3D, to selet a point as 'perpendicular from another point to a given plane'? (I can only see 'Intersection axis plane' and 'Intersection line plane', but these are not the same things). If not, this would be an easy but nice additional feature. |

measure distance between point and plane |

Daniel Barna | 17.2.2009 10:45 |

Hi, Thanks, moving an object is ok, because it has 3 axes, along which you can dynamically translate them (btw, for the method you described, you need to rotate your object first, such that one of its axes is aligned perpendicular to the given plane, and once you translated it to the plane, you need to rotate it back, which is a bit cumbersome...) But how would you measure a distance between a point and a plane? It's ok, as long as the point is on an edge, which happens to be perpendicular to the given plane, because then you can use the 'Intersection Line Plane' tool. But if the point does not happen to be on such an edge, it's difficult to define the line (going through this point and being perpendicular to the plane) Thanks |

measure distance between point and plane |

Marek Dedecius | 17.2.2009 15:10 |

Daniel, To measure a distance between a point and a plane, you can use the icon "Distance Point Plane". This way you can very quickly obtain the distance - it works even for cases very the point cannot be simply detected on the edges. For such cases, you can use options avaoable in the pop-up menu "3D Snaps" which is available just after clicking on the icon "Distance Point Plane". BTW: As to your first questions, it does not seem to be make any complicated rotations before moving the objects. See options available in the "3D Location" box, such as "X(Y,Z) Axis to Normal" or "X(Y,Z) Axis against Normal" etc. Thanks Marek |

thanks |

Daniel Barna | 17.2.2009 16:21 |

oh sorry, indeed... I did not recognize this icon, I always used the 3D Distance mode, and tried to navigate analogously to the 2D navigation. A big step ahead... To your second comment: it is not a complicated rotation, but it IS A ROTATION. I.e. you need to rotate your object (even though it's a simple rotation) so that one of its axes is perpendicular to the given plane, if you want to translate it along a line perpendicular to that plane, and once you translated the object, you must rotate it back. (and this second 'rotating back' might be more complicated, btw). So I think that finding a point on a plane as 'perpendicular from an external point to the plane' would still make sense, although my triggering question 'distance point plane' is solved now much easier. thanks |

perpendicular from point to plane |

Gianfranco Bianchi | 14.3.2009 22:19 |

Daniel, If I understand your problem, you don't need to rotate the solid; select "Translate by distance, define vector"; "selected plane's normal"; measure "distance point to plane" and it's done. Gianfranco |

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