API:Class/Trail

ExplorerImageIndex93.pngTrail : Object Icon.pngInstance

The Trail object is used to create a trail like effect between two points. As the points move through space a texture is drawn on the plane the points define. This is commonly used to create effects to help visualize movement like tracer trails behind projectiles, footprints, tire tracks, and many other similar effects.

TrailSegments.png
An example usage of the Trail object.

When a Trail is active it will record the position of it's attachments every frame. It then connects these positions to where the attachments were in the previous frame, creating a polygon. That polygon is then filled in with the Trail's Color and Texture (if that Texture exists). Each segment drawn in this way will eventually fade based on the TrailEffect's Lifetime.


Creating Trails

In order for a Trail to work properly it must be a descendant of the Workspace and its attachment properties (Attachment0 and Attachment1) must be set to two unique Attachments. Once this has been done the effect will create a trail as soon as either of its attachments move.

BasicTrail.gif

It is common practice to either store the Trail in the Part containing the effect's attachments, or as a child of a Folder in the Workspace with other effects objects.

Properties

PropertiesmemberhiddenProperties [toggle]

Ref<Attachment>Attachment0

Determines where the Trail will start drawing its segments.

|RMD member="API:Class/Trail/Attachment0"|Determines where the Trail will start drawing its segments.|/RMD|
Ref<Attachment>Attachment1

Determines where the Trail will start drawing its segments.

|RMD member="API:Class/Trail/Attachment1"|Determines where the Trail will start drawing its segments.|/RMD|
ColorSequenceColor

The color of the trail segments throughout the lifetime of the trail.

|RMD member="API:Class/Trail/Color"|The color of the trail segments throughout the lifetime of the trail.|/RMD|
boolEnabled

Toggles whether a trail will be drawn or not.

|RMD member="API:Class/Trail/Enabled"|Toggles whether a trail will be drawn or not.|/RMD|
boolFaceCamera

If set to true, the trail textures will always face the camera.

|RMD member="API:Class/Trail/FaceCamera"|If set to true, the trail textures will always face the camera.|/RMD|
floatLifetime

Duration of the trail in seconds.

|RMD member="API:Class/Trail/Lifetime"|Duration of the trail in seconds.|/RMD|
floatLightEmission

Sets how much the colors of the trail are blended with the colors behind them.

|RMD member="API:Class/Trail/LightEmission"|Sets how much the colors of the trail are blended with the colors behind them.|/RMD|
floatMinLength

Minimum length of a trail's segment in studs.

|RMD member="API:Class/Trail/MinLength"|Minimum length of a trail's segment in studs.|/RMD|
ContentTexture

The texture to display on the trail.

|RMD member="API:Class/Trail/Texture"|The texture to display on the trail.|/RMD|
floatTextureLength

Sets length of texture if TextureMode is Wrap or Static. If mode is Stretch sets number of times texture will repeat.

|RMD member="API:Class/Trail/TextureLength"|Sets length of texture if TextureMode is Wrap or Static. If mode is Stretch sets number of times texture will repeat.|/RMD|
TextureModeTextureMode

Sets how the Texture will be drawn.

|RMD member="API:Class/Trail/TextureMode"|Sets how the Texture will be drawn.|/RMD|
NumberSequenceTransparency

Sets the transparency of the Trail's segments over the trail's Lifetime.

|RMD member="API:Class/Trail/Transparency"|Sets the transparency of the Trail's segments over the trail's Lifetime.|/RMD|
Determines where the Trail will start drawing its segments.
Determines where the Trail will start drawing its segments.
The color of the trail segments throughout the lifetime of the trail.
Toggles whether a trail will be drawn or not.
If set to true, the trail textures will always face the camera.
Duration of the trail in seconds.
Sets how much the colors of the trail are blended with the colors behind them.
Minimum length of a trail's segment in studs.
The texture to display on the trail.
Sets length of texture if TextureMode is Wrap or Static. If mode is Stretch sets number of times texture will repeat.
Sets how the Texture will be drawn.
Sets the transparency of the Trail's segments over the trail's Lifetime.
Inherited from Object Icon.pngInstance:
boolArchivable

Determines if an object can be Clone or saved to file.

|RMD member="API:Class/Instance/Archivable"|Determines if an object can be Clone or saved to file.|/RMD|
stringClassName [readonly]

The unique name of this type of Instance.

|RMD member="API:Class/Instance/ClassName"|The unique name of this type of Instance.|/RMD|
stringName

A non-unique identifier for the object.

|RMD member="API:Class/Instance/Name"|A non-unique identifier for the object.|/RMD|
Ref<Instance>Parent

The hierarchical parent of the object.

|RMD member="API:Class/Instance/Parent"|The hierarchical parent of the object.|/RMD|
intDataCost [LocalUserSecurity] [deprecated] [readonly]

Deprecated. Do not use.

|RMD member="API:Class/Instance/DataCost"|Deprecated. Do not use.|/RMD|
boolRobloxLocked [PluginSecurity]

If true, the object and its descendants cannot be indexed or edited by a Script or LocalScript and will throw an error if it is attempted.

|RMD member="API:Class/Instance/RobloxLocked"|If true, the object and its descendants cannot be indexed or edited by a Script or LocalScript and will throw an error if it is attempted.|/RMD|
boolarchivable [deprecated] [hidden]

Deprecated in favor of Archivable.

|RMD member="API:Class/Instance/archivable"|Deprecated in favor of Archivable.|/RMD|
stringclassName [deprecated] [readonly]

Deprecated in favor of ClassName.

|RMD member="API:Class/Instance/className"|Deprecated in favor of ClassName.|/RMD|
Determines if an object can be Clone or saved to file.
ClassName [readonly]
The unique name of this type of Instance.
A non-unique identifier for the object.
The hierarchical parent of the object.
DataCost [LocalUserSecurity] [deprecated] [readonly]
Deprecated. Do not use.
RobloxLocked [PluginSecurity]
If true, the object and its descendants cannot be indexed or edited by a Script or LocalScript and will throw an error if it is attempted.
archivable [deprecated] [hidden]
Deprecated in favor of Archivable.
className [deprecated] [readonly]
Deprecated in favor of ClassName.

Functions

FunctionsmemberhiddenFunctions [toggle]

voidClear ( )

No documentation found.

|RMD member="API:Class/Trail/Clear"|No documentation found.|/RMD|
Clear ( )
No documentation found.
Inherited from Object Icon.pngInstance:
voidClearAllChildren ( )

Removes all descendants of the object.

|RMD member="API:Class/Instance/ClearAllChildren"|Removes all descendants of the object.|/RMD|
Ref<Instance>Clone ( )

Returns a copy of the object, including descendants, but only if the object is Archivable.

|RMD member="API:Class/Instance/Clone"|Returns a copy of the object, including descendants, but only if the object is Archivable.|/RMD|
voidDestroy ( )

Sets the Parent property to nil, locks the Parent property, disconnects all connections and calls Destroy() on all children.

|RMD member="API:Class/Instance/Destroy"|Sets the Parent property to nil, locks the Parent property, disconnects all connections and calls Destroy() on all children.|/RMD|
Ref<Instance>FindFirstAncestor ( string name )

Returns the first ancestor whose Name is equal to name, or nil if none can be found.

|RMD member="API:Class/Instance/FindFirstAncestor"|Returns the first ancestor whose Name is equal to name, or nil if none can be found.|/RMD|
Ref<Instance>FindFirstAncestorOfClass ( string className )

Returns the first ancestor whose ClassName is equal to className, or nil if none can be found.

|RMD member="API:Class/Instance/FindFirstAncestorOfClass"|Returns the first ancestor whose ClassName is equal to className, or nil if none can be found.|/RMD|
Ref<Instance>FindFirstAncestorWhichIsA ( string className )

Returns the first ancestor that inherits the class className, or nil if none can be found.

|RMD member="API:Class/Instance/FindFirstAncestorWhichIsA"|Returns the first ancestor that inherits the class className, or nil if none can be found.|/RMD|
Ref<Instance>FindFirstChild ( string name, bool recursive = false )

Returns the first child found with the given name, or nil if no such child exists. If the optional recursive argument is true, recursively descends the hierarchy while searching rather than only searching the immediate object.

|RMD member="API:Class/Instance/FindFirstChild"|Returns the first child found with the given name, or nil if no such child exists. If the optional recursive argument is true, recursively descends the hierarchy while searching rather than only searching the immediate object.|/RMD|
Ref<Instance>FindFirstChildOfClass ( string className )

Returns the first Instance whose ClassName is equal to className, or nil, if no such object is found with that ClassName.

|RMD member="API:Class/Instance/FindFirstChildOfClass"|Returns the first Instance whose ClassName is equal to className, or nil, if no such object is found with that ClassName.|/RMD|
Ref<Instance>FindFirstChildWhichIsA ( string className, bool recursive = false )

Returns the first child that inherits the class className, or nil if none can be found.

|RMD member="API:Class/Instance/FindFirstChildWhichIsA"|Returns the first child that inherits the class className, or nil if none can be found.|/RMD|
array<Instance>GetChildren ( )

Returns an array of the object's children.

|RMD member="API:Class/Instance/GetChildren"|Returns an array of the object's children.|/RMD|
array<Instance>GetDescendants ( )

Returns an array containing all of the descendants of the instance.

|RMD member="API:Class/Instance/GetDescendants"|Returns an array containing all of the descendants of the instance.|/RMD|
stringGetFullName ( )

Returns a string which shows the object's ancestry chain.

|RMD member="API:Class/Instance/GetFullName"|Returns a string which shows the object's ancestry chain.|/RMD|
RBXScriptSignalGetPropertyChangedSignal ( string property )

Returns a signal that is fired when the specified property is changed on this object.

|RMD member="API:Class/Instance/GetPropertyChangedSignal"|Returns a signal that is fired when the specified property is changed on this object.|/RMD|
boolIsA ( string className )

Returns true if the object is an instance of the given class, or if the object's class inherits from the given class.

|RMD member="API:Class/Instance/IsA"|Returns true if the object is an instance of the given class, or if the object's class inherits from the given class.|/RMD|
boolIsAncestorOf ( Instance descendant )

Returns true if the object is an ancestor of the given descendant.

|RMD member="API:Class/Instance/IsAncestorOf"|Returns true if the object is an ancestor of the given descendant.|/RMD|
boolIsDescendantOf ( Instance ancestor )

Returns true if the object is a descendant of the given ancestor.

|RMD member="API:Class/Instance/IsDescendantOf"|Returns true if the object is a descendant of the given ancestor.|/RMD|
Ref<Instance>WaitForChild ( string childName, double timeOut )

Yields the current thread until a child with the given name is found, then returns the child. If the timeOut parameter is specified, this function will time out and return nil if timeOut seconds elapse without the child being found.

|RMD member="API:Class/Instance/WaitForChild"|Yields the current thread until a child with the given name is found, then returns the child.

If the timeOut parameter is specified, this function will time out and return nil if timeOut seconds elapse without the child being found.|/RMD|

stringGetDebugId ( int scopeLength = 4 ) [PluginSecurity] [notbrowsable]

Returns a coded string of the object's DebugId used internally by Roblox.

|RMD member="API:Class/Instance/GetDebugId"|Returns a coded string of the object's DebugId used internally by Roblox.|/RMD|
voidRemove ( ) [deprecated]

Deprecated. Do not use.

|RMD member="API:Class/Instance/Remove"|Deprecated. Do not use.|/RMD|
array<Instance>children ( ) [deprecated]

Deprecated in favor of GetChildren.

|RMD member="API:Class/Instance/children"|Deprecated in favor of GetChildren.|/RMD|
Instanceclone ( ) [deprecated]

Deprecated in favor of Clone.

|RMD member="API:Class/Instance/clone"|Deprecated in favor of Clone.|/RMD|
voiddestroy ( ) [deprecated]

Deprecated in favor of Destroy.

|RMD member="API:Class/Instance/destroy"|Deprecated in favor of Destroy.|/RMD|
InstancefindFirstChild ( string name, bool recursive = false ) [deprecated]

Deprecated in favor of FindFirstChild.

|RMD member="API:Class/Instance/findFirstChild"|Deprecated in favor of FindFirstChild.|/RMD|
array<Instance>getChildren ( ) [deprecated]

Deprecated in favor of GetChildren.

|RMD member="API:Class/Instance/getChildren"|Deprecated in favor of GetChildren.|/RMD|
boolisA ( string className ) [deprecated]

Deprecated in favor of IsA.

|RMD member="API:Class/Instance/isA"|Deprecated in favor of IsA.|/RMD|
boolisDescendantOf ( Instance ancestor ) [deprecated]

Deprecated in favor of IsDescendantOf.

|RMD member="API:Class/Instance/isDescendantOf"|Deprecated in favor of IsDescendantOf.|/RMD|
voidremove ( ) [deprecated]

Deprecated in favor of Remove.

|RMD member="API:Class/Instance/remove"|Deprecated in favor of Remove.|/RMD|
Removes all descendants of the object.
Clone ( )
Returns a copy of the object, including descendants, but only if the object is Archivable.
Sets the Parent property to nil, locks the Parent property, disconnects all connections and calls Destroy() on all children.
Returns the first ancestor whose Name is equal to name, or nil if none can be found.
Returns the first ancestor whose ClassName is equal to className, or nil if none can be found.
Returns the first ancestor that inherits the class className, or nil if none can be found.
FindFirstChild ( string name, bool recursive = false )
Returns the first child found with the given name, or nil if no such child exists. If the optional recursive argument is true, recursively descends the hierarchy while searching rather than only searching the immediate object.
Returns the first Instance whose ClassName is equal to className, or nil, if no such object is found with that ClassName.
FindFirstChildWhichIsA ( string className, bool recursive = false )
Returns the first child that inherits the class className, or nil if none can be found.
Returns an array of the object's children.
Returns an array containing all of the descendants of the instance.
Returns a string which shows the object's ancestry chain.
Returns a signal that is fired when the specified property is changed on this object.
IsA ( string className )
Returns true if the object is an instance of the given class, or if the object's class inherits from the given class.
IsAncestorOf ( Instance descendant )
Returns true if the object is an ancestor of the given descendant.
Returns true if the object is a descendant of the given ancestor.
WaitForChild ( string childName, double timeOut )
Yields the current thread until a child with the given name is found, then returns the child. If the timeOut parameter is specified, this function will time out and return nil if timeOut seconds elapse without the child being found.
GetDebugId ( int scopeLength = 4 ) [PluginSecurity] [notbrowsable]
Returns a coded string of the object's DebugId used internally by Roblox.
Remove ( ) [deprecated]
Deprecated. Do not use.
children ( ) [deprecated]
Deprecated in favor of GetChildren.
clone ( ) [deprecated]
Deprecated in favor of Clone.
destroy ( ) [deprecated]
Deprecated in favor of Destroy.
findFirstChild ( string name, bool recursive = false ) [deprecated]
Deprecated in favor of FindFirstChild.
getChildren ( ) [deprecated]
Deprecated in favor of GetChildren.
isA ( string className ) [deprecated]
Deprecated in favor of IsA.
isDescendantOf ( Instance ancestor ) [deprecated]
Deprecated in favor of IsDescendantOf.
remove ( ) [deprecated]
Deprecated in favor of Remove.


Events

EventsmemberhiddenEvents [toggle]

Inherited from Object Icon.pngInstance:
AncestryChanged ( Instance child, Instance parent )

Fires when the Parent property of the object or one of its ancestors is changed.

|RMD member="API:Class/Instance/AncestryChanged"|Fires when the Parent property of the object or one of its ancestors is changed.|/RMD|
Changed ( string property )

Fires after a property of the object changes.

|RMD member="API:Class/Instance/Changed"|Fires after a property of the object changes.|/RMD|
ChildAdded ( Instance child )

Fires when a child is added to the object.

|RMD member="API:Class/Instance/ChildAdded"|Fires when a child is added to the object.|/RMD|
ChildRemoved ( Instance child )

Fires when a child is removed from the object.

|RMD member="API:Class/Instance/ChildRemoved"|Fires when a child is removed from the object.|/RMD|
DescendantAdded ( Instance descendant )

Fires when a descendant is added to the object.

|RMD member="API:Class/Instance/DescendantAdded"|Fires when a descendant is added to the object.|/RMD|
DescendantRemoving ( Instance descendant )

Fires before a descendant of the object is removed.

|RMD member="API:Class/Instance/DescendantRemoving"|Fires before a descendant of the object is removed.|/RMD|
childAdded ( Instance child ) [deprecated]

Deprecated in favor of ChildAdded.

|RMD member="API:Class/Instance/childAdded"|Deprecated in favor of ChildAdded.|/RMD|
Fires when the Parent property of the object or one of its ancestors is changed.
Changed ( string property )
Fires after a property of the object changes.
Fires when a child is added to the object.
Fires when a child is removed from the object.
DescendantAdded ( Instance descendant )
Fires when a descendant is added to the object.
Fires before a descendant of the object is removed.
childAdded ( Instance child ) [deprecated]
Deprecated in favor of ChildAdded.
|RMD member="API:Class/Trail"|The Trail object is used to create a trail like effect between two points. As the points move through space a texture is drawn on the plane the points define. This is commonly used to create effects to help visualize movement like tracer trails behind projectiles, footprints, tire tracks, and many other similar effects. TrailSegments.png
An example usage of the Trail object.
When a Trail is active it will record the position of it's attachments every frame. It then connects these positions to where the attachments were in the previous frame, creating a polygon. That polygon is then filled in with the Trail's Color and Texture (if that Texture exists). Each segment drawn in this way will eventually fade based on the TrailEffect's Lifetime. =Creating Trails= In order for a Trail to work properly it must be a descendant of the Workspace and its attachment properties (Attachment0 and Attachment1) must be set to two unique Attachments. Once this has been done the effect will create a trail as soon as either of its attachments move. BasicTrail.gif It is common practice to either store the Trail in the Part containing the effect's attachments, or as a child of a Folder in the Workspace with other effects objects. |/RMD|