Synfig Studio :: Documentation - User contributions [en]

TCB

2010-11-14T01:29:38Z

Niabot:

An {{l|Waypoints#Interpolation|interpolation}} type, TCB is an acronym for Tension, Continuity, Bias, the three qualities which define the shape of the curve if you plot the value of the interpolated parameter against time.

Using the TCB interpolation type will fit a smooth curve between adjacent waypoints, much like the bline tool fits smooth curves between adjacent bline vertices. The interpolation can be controlled by four values. These are tension, continuity, bias and temporal tension. In simple words they control the following things:

; Tension
: The tension defines how sharply the keyframe will be targeted (how much inverse effect the tangent has). Its very much comparable to the handles of a bezier curve, while this value will define in a reverse way how long the handles are.
:* A higher value will force more linear movement from waypoint to waypoint, since the handles getting shorter. Resulting in a hard direction change if it's set to 1.0. In this case it is equal to linear movement (Handles have length 0), if the the other parameters having the default 0 value. Setting it higher then 1.0 will result in a curved movement that will circle around this waypoint (handles are scaled in negative direction (swapped).
:* Lower values will force the the object to follow the tangent (handles) of the waypoint. For very low values most of the movement will be along the tangent, since the thought handles are very long.

; Continuity
: This value defines how the tangent is computed. This is also comparable to the handles of a point on a bezier curve. A value of zero will lead to mirrored (merged) handles, resulting in a smooth transition.
:* Setting it to -1.0 will result in a simple cusp, giving linear interpolation with sharp corner.
:* Setting it even lower will form a sharper cusp, so that the movement inward an outward get more and more mirrored.
:* Setting it to higher values then 0 will have the same effect, but the handles will move in mirrored direction. So the interpolation will move from the outside into this waypoint.

; Bias
: This value defines which side segment before and after the keyframe will have more influence on the computed tangent. If the Bias is lower then 0 then the tangent will be more oriented to along the incoming direction. If greater then 0 it will be more oriented to the outgoing direction.

; Temporal Tension
: In default the speed for an object is constant while passing equally distanced waypoints with equal time between them. This value can be used to manipulate the speed of the movement.
:* Higher values then 0 will force the object to spend more time near that waypoint. Resulting in slow motion shortly before and after the waypoint. On the other hand speed will increase before reaching the next waypoint.
:::As an illustrative example you can think of a ball sitting on a small hill ''(previous waypoint)'', running down a small valley and getting a bit faster, before it runs up a large hill and getting very slow as it reaches the top ''(modified waypoint)''. After that it will run downward until it finds itself with highest speed in a small valley again, running up the next small hill, loosing some of its speed as it is reached the top ''(next waypoint)''.
:* Lower values then 0 will force the object to pass the waypoint faster. Resulting in slow motion near the previous and next waypoint. Comparable to an ball thats running down a valley. (opposite of the previous thought example)

== Further Information ==
* There is some mathematical discussion of TCB [http://www.cubic.org/docs/hermite.htm here].
* [http://en.wikipedia.org/wiki/Kochanek%E2%80%93Bartels_spline Kochanek–Bartels spline] (also known as TCB-Spline)

TCB

2010-10-27T20:14:35Z

Niabot: /* Further Information */

An {{l|Waypoints#Interpolation|interpolation}} type, TCB is an acronym for Tension, Continuity, Bias, the three qualities which define the shape of the curve if you plot the value of the interpolated parameter against time.

Using the TCB interpolation type will fit a smooth curve between adjacent waypoints, much like the bline tool fits smooth curves between adjacent bline vertices. The interpolation can be controlled by four values. These are tension, continuity, bias and temporal tension. In simple words they control the following things:

; Tension
: The tension defines how sharply the keyframe will be targeted (how much inverse effect the tangent has). Its very much comparable to the handles of a bezier curve, while this value will define in a reverse way how long the handles are.
:* A higher value will force more linear movement from waypoint to waypoint, since the handles getting shorter. Resulting in a hard direction change if it's set to 1.0. In this case it is equal to linear movement (Handles have length 0), if the the other parameters having the default 0 value. Setting it higher then 1.0 will result in a curved movement that will circle around this waypoint (handles are scaled in negative direction (swapped).
:* Lower values will force the the object to follow the tangent (handles) of the waypoint. For very low values most of the movement will be along the tangent, since the thought handles are very long.

; Continuity
: This value defines how the tangent is computed. This is also comparable to the handles of a point on a bezier curve. A value of zero will lead to mirrored (merged) handles, resulting in a smooth transition.
:* Setting it to -1.0 will result in a simple cusp, giving linear interpolation with sharp corner.
:* Setting it even lower will form a sharper cusp, so that the movement inward an outward get more and more mirrored.
:* Setting it to higher values then 0 will have the same effect, but the handles will move in mirrored direction. So the interpolation will move from the outside into this waypoint.

; Bias
: This value defines an rotation offset to the computed tangent (or handles). It ranges from -90° to 90°. Only values of -20 to 20 can be used as input, but will be converted (linear?) to this angle range.

; Temporal Tension
: In default the speed for an object is constant while passing equally distanced waypoints with equal time between them. This value can be used to manipulate the speed of the movement.
:* Higher values then 0 will force the object to spend more time near that waypoint. Resulting in slow motion shortly before and after the waypoint. On the other hand speed will increase before reaching the next waypoint.
:::As an illustrative example you can think of a ball sitting on a small hill ''(previous waypoint)'', running down a small valley and getting a bit faster, before it runs up a large hill and getting very slow as it reaches the top ''(modified waypoint)''. After that it will run downward until it finds itself with highest speed in a small valley again, running up the next small hill, loosing some of its speed as it is reached the top ''(next waypoint)''.
:* Lower values then 0 will force the object to pass the waypoint faster. Resulting in slow motion near the previous and next waypoint. Comparable to an ball thats running down a valley. (opposite of the previous thought example)

== Further Information ==
* There is some mathematical discussion of TCB [http://www.cubic.org/docs/hermite.htm here].
* [http://en.wikipedia.org/wiki/Kochanek%E2%80%93Bartels_spline Kochanek–Bartels spline] (must be the thing TBC uses)

Mouse Shortcuts

2010-10-27T17:12:25Z

Niabot: Middle Mousebutton can be emulated by pressing left and right together. (At least in Gnome)

{{TranslationBar|CONTENT={{l|Mouse Shortcuts|English}} · {{l|Mouse Shortcuts.es|Español}}}}


{{Category|Permalink}}

Here is a list of mouse short cuts you have available. Some work combined with keystrokes and also only works in some situations. Please if you find out more, you know what to do!

{| border="1" cellspacing="0" align="center" width="80%"
|'''Keystroke'''||'''Mouse action'''||'''Where'''||'''Description'''
|-
| <none> ||Wheel up/down||Over canvas window|| Pan up/down the view.
|-
| <CTRL> ||Wheel up/down||Over canvas window|| Zoom in/out the view over the mouse position.
|-
| <SHIFT> ||Wheel up/down||Over canvas window|| Pan left/right the view.
|-
| <none> ||Hold Middle & drag (under Gnome (KDE?) you can also emulate this behavior by pressing left and right together)||Over canvas window|| Pan the view in the direction of the drag.
|-
| <none> ||Wheel up/down||Over curves dialog|| Zoom in/out the vertical scale of the graph.
|-
| <none> ||Wheel up/down||Over time line bar|| Zoom in/out the time scale
|-
| <CTRL> ||Wheel up/down||Over time line bar|| Zoom in/out the time scale with the time cursor centered
|-
| <CTRL> ||Left click||Over {{l|Waypoints|waypoint}}|| Adds the clicked waypoint to selected waypoints group (only valid for a parameter each time)
|-
| <ALT> or <CTRL>+<ALT> ||Left click||Over {{l|Waypoints|waypoint}}|| Delete the clicked waypoint and the selected waypoints group too
|-
| <SHIFT> ||Left click + drag||Over {{l|Waypoints|waypoint}}|| Copy the clicked waypoint and the selected waypoints group to the dragged place
|-
| <none> ||Left click + drag||Over {{l|Waypoints|waypoint}}|| Move the clicked waypoint and the selected waypoints group to the dragged place
|-
| <none> ||Left click||Over right-top part of the brush size minicanvas|| Increases the brush size by 0.25
|-
| <none> ||Left click||Over left-bottom part of the brush size minicanvas|| Decreases the brush size by 0.25
|-
| <none> ||Right click||Over brush size minicanvas|| Set the brush size to 3.0pt (default value?)
|-
| <none> ||Right click||Over up arrow of the brush size|| Set the brush size to the maximum value (10000000.00pt) (not so useful?)
|-
| <none> ||Right click||Over down arrow of the brush size|| Set the brush size to the minimum value (0.00pt)
|}

TCB

2010-10-27T13:18:40Z

Niabot:

An {{l|Waypoints#Interpolation|interpolation}} type, TCB is an acronym for Tension, Continuity, Bias, the three qualities which define the shape of the curve if you plot the value of the interpolated parameter against time.

Using the TCB interpolation type will fit a smooth curve between adjacent waypoints, much like the bline tool fits smooth curves between adjacent bline vertices. The interpolation can be controlled by four values. These are tension, continuity, bias and temporal tension. In simple words they control the following things:

; Tension
: The tension defines how sharply the keyframe will be targeted (how much inverse effect the tangent has). Its very much comparable to the handles of a bezier curve, while this value will define in a reverse way how long the handles are.
:* A higher value will force more linear movement from waypoint to waypoint, since the handles getting shorter. Resulting in a hard direction change if it's set to 1.0. In this case it is equal to linear movement (Handles have length 0), if the the other parameters having the default 0 value. Setting it higher then 1.0 will result in a curved movement that will circle around this waypoint (handles are scaled in negative direction (swapped).
:* Lower values will force the the object to follow the tangent (handles) of the waypoint. For very low values most of the movement will be along the tangent, since the thought handles are very long.

; Continuity
: This value defines how the tangent is computed. This is also comparable to the handles of a point on a bezier curve. A value of zero will lead to mirrored (merged) handles, resulting in a smooth transition.
:* Setting it to -1.0 will result in a simple cusp, giving linear interpolation with sharp corner.
:* Setting it even lower will form a sharper cusp, so that the movement inward an outward get more and more mirrored.
:* Setting it to higher values then 0 will have the same effect, but the handles will move in mirrored direction. So the interpolation will move from the outside into this waypoint.

; Bias
: This value defines an rotation offset to the computed tangent (or handles). It ranges from -90° to 90°. Only values of -20 to 20 can be used as input, but will be converted (linear?) to this angle range.

; Temporal Tension
: In default the speed for an object is constant while passing equally distanced waypoints with equal time between them. This value can be used to manipulate the speed of the movement.
:* Higher values then 0 will force the object to spend more time near that waypoint. Resulting in slow motion shortly before and after the waypoint. On the other hand speed will increase before reaching the next waypoint.
:::As an illustrative example you can think of a ball sitting on a small hill ''(previous waypoint)'', running down a small valley and getting a bit faster, before it runs up a large hill and getting very slow as it reaches the top ''(modified waypoint)''. After that it will run downward until it finds itself with highest speed in a small valley again, running up the next small hill, loosing some of its speed as it is reached the top ''(next waypoint)''.
:* Lower values then 0 will force the object to pass the waypoint faster. Resulting in slow motion near the previous and next waypoint. Comparable to an ball thats running down a valley. (opposite of the previous thought example)

== Further Information ==
* There is some mathematical discussion of TCB [http://www.cubic.org/docs/hermite.htm here].

TCB

2010-10-27T13:05:18Z

Niabot: Crazy stuff. At least the inputvalues are not very intuitive.

An {{l|Waypoints#Interpolation|interpolation}} type, TCB is an acronym for Tension, Continuity, Bias, the three qualities which define the shape of the curve if you plot the value of the interpolated parameter against time.

Using the TCB interpolation type will fit a smooth curve between adjacent waypoints, much like the bline tool fits smooth curves between adjacent bline vertices. The interpolation can be controlled by four values. These are tension, continuity, bias and temporal tension. In simple words they control the following things:

; Tension
: The tension defines how sharply the keyframe will be targeted (how much inverse effect the tangent has). Its very much comparable to the handles of a bezier curve, while this value will define in a reverse way how long the handles are.
:* A higher value will force more linear movement from waypoint to waypoint, since the handles getting shorter. Resulting in a hard direction change if it's set to 1.0. In this case it is equal to linear movement (Handles have length 0), if the the other parameters having the default 0 value. Setting it higher then 1.0 will result in a curved movement that will circle around this waypoint (handles are scaled in negative direction (swapped).
:* Lower values will force the the object to follow the tangent (handles) of the waypoint. For very low values most of the movement will be along the tangent, since the thought handles are very long.

; Continuity
: This value defines how the tangent is computed. This is also comparable to the handles of a point on a bezier curve. A value of zero will lead to mirrored (merged) handles, resulting in a smooth transition.
:* Setting it to -1.0 will result in a simple cusp, giving linear interpolation with sharp corner.
:* Setting it even lower will form a sharper cusp, so that the movement inward an outward get more and more mirrored.
:* Setting it to higher values then 0 will have the same effect, but the handles will move in mirrored direction. So the interpolation will move from the outside into this waypoint.

; Bias
: This value defines an rotation offset to the computed tangent (or handles). It ranges from -90° to 90°. Only values of -20 to 20 can be used as input, but will be converted (linear?) to this angle range.

; Temporal Tension
: In default the speed for an object is constant while passing equally distanced waypoints with equal time between them. This value can be used to manipulate the speed of the movement.
:* Higher values then 0 will force the object to spend more time near that waypoint. Resulting in slow motion shortly before and after the waypoint. On the other hand speed will increase before reaching the next waypoint.
:* Lower values then 0 will force the object to pass the waypoint faster. Resulting in slow motion near the previous and next waypoint. Comparable to an ball thats running down a valley. Starting on the left it increases slowly its speed, having its highest speed at the bottom and slows down while running upwards the other side.

== Further Information ==
* There is some mathematical discussion of TCB [http://www.cubic.org/docs/hermite.htm here].