| Overview | Other tabs
Deforms an object dynamically in response to its motion.
To apply: Select one or more objects, clusters, or points then choose Deform > Quick Stretch from the Model or Animate toolbar.
To redisplay: Select the deformed object then choose Edit > Properties > Modeling Properties and click the QStretch Op tab.
The parameters on the Overview tab control how an object deforms in response to four separate aspects of its motion: Linear Velocity, Angular Velocity, Linear Acceleration, and Angular Acceleration.
Mute |
Toggles the deformation on and off without affecting the values of other parameters. |
Flex |
Bends back in the direction of motion as if due to wind resistance. |
Stretch |
Elongates in the direction of motion. |
Yield |
Bulges as if internal mass was being displaced. |
The other tabs give fine control over the deformations caused by each aspect of motion. The parameters are the same on each page.
Mute |
Toggles the entire Qstretch deformation on and off without affecting the values of other parameters. This is the same option as on the Overview tab. |
Reference for Lock X/Y/Z |
Determines which coordinate system is used when you lock axes: Global or Local. Local is particularly useful when there is a rotational component to the motion, such as when animating along a path. |
Flex |
Bends back in the direction of motion as if due to wind resistance. This is the same option as that in the corresponding section of the Overview tab. |
Stretch |
Elongates in the direction of motion. This is the same option as that in the corresponding section of the Overview tab. |
Yield |
Bulges as if internal mass were being displaced. This is the same option as that in the corresponding section of the Overview tab. |
Ampl. |
The sensitivity of the deformation with respect to the motion |
Max. |
The maximum amount of deformation in terms of the object’s bounding box. With a value of 1, an object could elongate up to twice its original size; with a value of 0.5, it could elongate up to 1.5 times its original size, and so on. |
Profile |
The profile of the deformation. This parameter applies to Flex and Yield. • Curved. The object bends into a curve as if it were flexible. • Linear. The object bends with a linear profile as if it were non-flexible but still subject to shear forces. |
Volume |
How the object deforms when Stretch is on: • Keep Volume. As the object elongates in the direction of motion, it becomes thinner in the other directions to preserve the approximate volume. This results in a squash-and-stretch effect. • Free Volume. As the object elongates, the other directions are unaffected as if the object had an elastic surface. |
Lock X, Y, Z |
Prevents the deformation from being applied in the corresponding axis. The reference can be local or global, depending on Reference for Lock X/Y/Z. |
SOFTIMAGE|XSI v.6.01