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First pass at relative snap.

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nick_m 2015-05-25 06:23:51 +10:00
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_manual/15_editing-and-arranging/04_snap-to-the-grid.html
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@ -11,30 +11,58 @@ menu_title: Snap to Grid
various objects to snap to this grid, and how you want the snapping to various objects to snap to this grid, and how you want the snapping to
behave. You can modify the grid units to fit your needs. behave. You can modify the grid units to fit your needs.
</p> </p>
<h2>About Snapping</h2>
<p>There are two ways to think about aligning material to a grid.
The first and most obvious one is where an object\'s position is clamped
to grid lines. In Ardour, this is called <defn>absolute snap</defn>
and is commonly used when working with sampled material where audio
begins exactly at the beginning of a file, note or region.</br>
The second, <defn>relative snap</defn>, is used when an object's position
relative to the grid is important. In music, this allows you to
move objects around without changing the "feel" (or timing) of a performance.</br>
Relative snap is the default method of snapping in Ardour.</br>
While dragging objects you may switch from relative to absolute snap by
pressing the absolute snap modifier key(s).</br>
You may also disable snap entirely by using the snap modifier.
The absolute snap and snap modifiers (along with other modifier keys) may be set in
<kbd class="menu">Edit &gt; Preferences &gt; User Interaction</kbd></br>
For common use patterns, it is recommended that you assign a unique key for
one snap modifier and two keys for the other in such a way that they share an otherwise unused key.
For example, you may choose the snap modifier to be the <kbd class="mod2"> key and the
absolute snap modifier to be <kbd class="mod2">&nbsp; and </kbd>, <kbd class="mod4">&nbsp;</kbd>.
</p>.
<h2>Snap Modes</h2> <h2>Snap Modes</h2>
<p>Ardour supports three different types of snapping to the grid:</p> <p>Using the above types, Ardour supports three different modes of snapping to the grid:</p>
<dl class="wide-table"> <dl class="wide-table">
<dt><kbd class="menu">No Grid</kbd></dt> <dt><kbd class="menu">No Grid</kbd></dt>
<dd>disables the grid. All objects move freely in this mode.</dd> <dd>disables the grid. All objects move freely in this mode.
In this mode, you may activate the grid by pressing the snap modifier (for relative snap).
or switch to absolute snap by pressing the absolute snap modifier.</dd>
<dt><kbd class="menu">Grid</kbd></dt> <dt><kbd class="menu">Grid</kbd></dt>
<dd>activates normal snapping. All positions of objects are restricted <dd>activates normal snapping. All positions of objects maintain their
to points of the grid. (See <a href="#gridunits">Grid Units</a> below offset relative to the grid. (See <a href="#gridunits">Grid Units</a> below
to change these points). If you try to move an object in "Grid"-mode, it to change these points). If you try to move an object in "Grid"-mode, it
does not change its position until you move the mouse far enough for the does not change its position until you move the mouse far enough for the
object to reach the next grid point. New objects will always be created at object to reach the same relative position on the next grid line.</br>
grid points, too. Sometimes you may wish to place an object exactly on a grid line.
In order to do this, use the "snap to absolute" modifier.
When holding down this modifier during a drag, the dragged object will jump
to the grid lines rather than maintaining its original distance from the line.</br>
New objects will always be created at grid points.</br>
Holding down the snap modifier will disable the current grid setting and allow you to move the object freely.</br>
</dd> </dd>
<dt><kbd class="menu">Magnetic</kbd></dt> <dt><kbd class="menu">Magnetic</kbd></dt>
<dd>is a less strict type of snapping. Objects can still be moved to any <dd>is a less strict type of snapping. Objects can still be moved to any
position, but positions close to grid points will snap to the grid point. position, but positions close to the relative or absolute grid points will snap.
In order to move an object very close to a grid point, it may be necessary In order to move an object very close to a snap point, it may be necessary
to zoom in to prevent snapping to that point.</dd> to zoom in to prevent snapping to that point, or to use the snap modifier to disable snap completely.</br>
As with Grid mode, both the snap modifier and absolute snap modifiers function in this mode.</dd>
</dl> </dl>
<h2>Syncing Regions to the Grid</h2> <h2>Syncing Regions to the Grid</h2>
<p> <p>
By default, a region's beginning will snap to points along the timeline, By default, a region's beginning will be used as the reference for both types of snapping,
but you can change this behaviour by setting a <dfn>sync point</dfn> in but you can change this behaviour by setting a <dfn>sync point</dfn> in
the region. Select the region(s) and press <kbd>V</kbd>. This will set the region. Select the region(s) and press <kbd>V</kbd>. This will set
the sync point to your edit point.</p> the sync point to your edit point.</p>
@ -46,7 +74,7 @@ menu_title: Snap to Grid
</p> </p>
<dl class="wide-table"> <dl class="wide-table">
<dt><kbd class="menu">CD Frames</kbd></dt> <dt><kbd class="menu">CD Frames</kbd></dt>
<dd>A CD Frame is 1/75th of a second. Snapping to CD Frames can be used to avoid issues with CD track <dd>A CD Frame is 1/75th of a second. Snapping to CD Frames (using absolute snap) can be used to avoid issues with CD track
lengths.</dd> lengths.</dd>
<dt><kbd class="menu">Timecode Frames/Seconds/Minutes</kbd></dt> <dt><kbd class="menu">Timecode Frames/Seconds/Minutes</kbd></dt>
<dd>The duration of a frame depends on the timecode settings for the <dd>The duration of a frame depends on the timecode settings for the