wiki:Help/Action/Extrude

Create Areas By Extrusion

source:trunk/images/mapmode/extrude/extrude.png Keyboard shortcut: X — is a one of the JOSM modes

Combination of 90 and 180 degree tools, more details below.

Table of Contents

  1. Move a node along adjacent segment (+Ctrl)
  2. Move segment in parallel (+Ctrl)
  3. Basic extrude usage on closed ways
    1. Special case with two nodes
    2. On closed ways
    3. Double click will insert a node
    4. Modifiers
      1. Dual alignment (X X)
      2. Create intermediate points (+Shift)
      3. Create a new way nearby (+Alt)
  4. Extrude usage on unclosed ways
    1. Drag end node with (+Ctrl)
  5. Advanced Preferences

Move a node along adjacent segment (+Ctrl)

Special case when a node selected, press Ctrl to activate mode. This mode doesn't create any new nodes or ways.

Will move a node in every of two directions. Resulting point can be moved in one of (2*adjacent segments) directions:

Move segment in parallel (+Ctrl)

source:trunk/images/cursor/modifier/rectangle_move.png Move segment in parallel. Nodes are moved even if they are connected to other ways.

This mode doesn't create any new nodes or ways.

Basic extrude usage on closed ways

Following demo uses multiple tools which will be described below:

https://github.com/mapbox/mapping/wiki/Advanced-mapping-guide#buildings https://github.com/mapbox/mapping/issues/162

Special case with two nodes

If you start with just a single line segment, you will get a rectangle.

On closed ways

Click on a way segment and drag it. There are up to 3 possible directions - at right angle to the original position and along its neighbouring segments. The chosen reference segment will be indicated.

Note: In certain cases new nodes will not be created. Specifically, if new segment is just lengthening of the old one. However, the node will not be moved when it's part of another way, as to not affect the other way.

Double click will insert a node

A double click at a way segment inserts a new node.

Modifiers

Dual alignment (X X)

Toggled by X or the source:trunk/images/mapmode/extrude/dualalign.png item in the Edit menu. Instead of using one reference segment and moving both nodes of the selected original segment in the same direction, this mode uses two reference segments (neigbors of the original segment) and moves the nodes each according to its own reference segment.

The status is indicated in the status line and visually (two reference segments shown instead of one).

Create intermediate points (+Shift)

source:trunk/images/cursor/modifier/rectangle_plussmall.png Always create nodes, even if new segment is just lengthening of the old one.

Create a new way nearby (+Alt)

source:trunk/images/cursor/modifier/rectangle_plus.png Don't alter original way, create new way instead. Ways will share the two nodes.

Extrude usage on unclosed ways

Drag end node with (+Ctrl)

Will extend way (move a node along segment):

you can also use this mode to extend or shink a line

Advanced Preferences

  • Color of main line: Defaults to selected color, but can be changed with advanced preference color.extrude.main.line.
  • Stroke of main line: extrude.stroke.main. Parameters: <width> for solid line (width in pixels), <width> <dashlength> <spacelength> for dashed line.
  • Stroke of old line (used while moving segment): extrude.ctrl.stroke.old-line (stroke parameters).
  • Color of helper line: Extrude: helper line in colors settings.
  • Stroke of helper line: extrude.stroke.helper-line (stroke parameters).
  • Size of right angle helper symbol: extrude.angle-symbol-radius (pixels).
  • Moving nodes without the need of pressing Ctrl: extrude.drag-nodes-without-ctrl (boolean).
  • Ignoring shared nodes to avoid overlapping segments: extrude.ignore-shared-nodes (boolean).

If enabled (default), nodes shared with other way(s) are left untouched and new node is created to facilitate the extrusion.

Ignore shared nodes enabled[[br]] 1. original, 2. extrude from 1 downwards, 3. extrude from 1 upwards

If disabled, shared nodes are still part of the way, segments might overlap.

Ignore shared nodes disabled[[br]] 1. original, 2. extrude from 1 downwards, 3. extrude from 1 upwards

  • The extrude action will be performed only if the pointer moved more than specified distance: extrude.initial-move-threshold (pixels, default 1).
  • Changing the keyboard shortcut of Dual alignment mode: Set extrude.dualalign.toggleOnRepeatedX to false to disable the default one, set new one via Mode: Extrude Dual alignment shortcut.

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Last modified 7 weeks ago Last modified on 2016-05-09T04:47:45+02:00

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