jit.phys.conetwist
Description
jit.phys.conetwist is a special point-to-point constraint that restricts the translation and allows limits on the rotation. The x-axis serves as a twist axis. This can be useful to represent limbs of a body, such as arms and legs. Motor forces can be applied to the constraint. If only a single body is bound, it is constrained to a point in world space.
Examples
Attributes
bias [float]
Magnitude of the limit's position correction (default = 0.3). This attribute sets how strictly the position error is corrected. For most cases, the value should not be greater than 1.
body1 [symbol]
The name of the first jit.phys.body to constrain.
body2 [symbol]
The name of the second jit.phys.body to constrain.
collisions [int]
Enables collisions between attached bodies (default = 0).
enable [int]
Enable this constraint in the physics simulation (default = 1).
position1 [3 floats]
The pivot point of body1 as a 3D vector relative to the body1 center of mass (default = 0 0 0).
position2 [3 floats]
The pivot point of body2 as a 3D vector relative to the body2 center of mass (default = 0 0 0). If body2 is blank, this is the worldspace position of the constraint.
quat1 [4 floats]
The quaternion orientation of body1 relative to the constraint (default = 0 0 0 1).
quat2 [4 floats]
The quaternion orientation of body2 relative to the constraint (default = 0 0 0 1). If body2 is blank, this is the worldspace orientation of the constraint.
relaxation [float]
The rate at which velocity errors are corrected by limits, effectively the strength of the limits (default = 1.0) . Lower values specify weaker limits. For most cases, the relaxation value should not be greater than 1.
rotate1 [4 floats]
Rotation of body1 relative to the constraint (default = 0 0 0 1).
rotate2 [4 floats]
Rotation of body2 relative to the constraint (default = 0 0 0 1). If body2 is blank, this is the worldspace orientation of the constraint.
rotatexyz1 [3 floats]
Euler rotation of body1 relative to the constraint (default = 0 0 0).
rotatexyz2 [3 floats]
Euler rotation of body2 relative to the constraint (default = 0 0 0). If body2 is blank, this is the worldspace orientation of the constraint.
strength [float]
Set the constraint strength (default = 0.2). Determines what proportion of the joint error will be fixed each simulation step. Values between 0.1 and 0.8 are recommended.
stretch [float]
Set the constraint stretch (default = 0.0). Setting to a positive value allows forces acting on rigid bodies to violate the constraint by an amount proportional to the stretch value.
swing1limit [float]
The limit of allowed rotation in degrees in either direction around the swing 1 axis (default = 180). With a limit of 180 degrees, rotation is unconstrainted around the axis.
swing2limit [float]
The limit of allowed rotation in degrees in either direction around the swing 2 axis (default = 180). With a limit of 180 degrees, rotation is unconstrainted around the axis.
twistlimit [float]
The limit, in degrees, of allowed rotation in degrees in either direction around the twist axis (default = 180). With a limit of 180 degrees, rotation is unconstrainted around the axis.
worldname [symbol]
The name of a jit.phys.world context this constraint is bound to.
worldpos [3 floats]
The derived constraint world position (default = 0 0 0)
worldquat [4 floats]
The derived constraint world quaternion (default = 0 0 0 1)
Common Box Attributes
annotation [symbol]
Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.
background [int] (default: 0)
Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.
color [4 floats]
Sets the color for the object box outline.
fontface [int]
Sets the type style used by the object. The options are:
plain
bold
italic
bold italic
Possible values:
0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'
fontname [symbol]
Sets the object's font.
fontsize [float]
Sets the object's font size (in points).
Possible values:
'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'
hidden [int] (default: 0)
Toggles whether an object is hidden when the patcher is locked.
hint [symbol]
Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.
ignoreclick [int] (default: 0)
Toggles whether an object ignores mouse clicks in a locked patcher.
jspainterfile [symbol]
JS Painter File
patching_rect [4 floats] (default: 0. 0. 100. 0.)
Sets the position and size of the object in the patcher window.
position [2 floats]
Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.
presentation [int] (default: 0)
Sets whether an object belongs to the patcher's presentation.
presentation_rect [4 floats] (default: 0. 0. 0. 0.)
Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.
rect [4 floats]
Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).
size [2 floats]
Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.
textcolor [4 floats]
Sets the color for the object's text in RGBA format.
textjustification [int]
Sets the justification for the object's text.
Possible values:
0 = 'left'
1 = 'center'
2 = 'right'
varname [symbol]
Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.
Messages
reset
See Also
| Name | Description |
|---|---|
| Working with OpenGL | Working with OpenGL |
| jit.phys.world | Collision detection and rigid body dynamics |
| jit.phys.body | A rigid body and collision shape |
| jit.phys.barslide | A bar constraint in a physics world |
| jit.phys.hinge | A hinge constraint in a physics world |
| jit.phys.point2point | A point to point constraint in a physics world |
| jit.phys.6dof | A six degrees of freedom constraint in a physics world |