Scale Constraint

Summary

The Scale Constraint operates similarly to the translation constraint but focuses on synchronizing the scale properties of one object with a target. This lesson covers setting targets, defining axis-specific copying, setting percentage-based limits (min/max), and the behavior of constraints when duplicating objects.

Step by Step

1. 00:20
   Adding the Constraint

   Select the object you wish to constrain, navigate to the Constraints section in the Inspector, and add a Scale Constraint.
2. 00:36
   Assigning the Target

   Open the constraint settings and select the object that will drive the scaling behavior.
3. 00:57
   Adjusting Strength and Offset

   Use the Strength slider to control the influence (animatable) and toggle Offset if you want to maintain the current relative scale differences.
4. 01:19
   Axis Control

   Toggle the checkboxes to choose whether to copy the X axis, Y axis, or both.
5. 01:27
   Setting Scale Limits

   Define Minimum and Maximum values (represented as decimals, e.g., 0.5 for 50%) to restrict the scaling range.
6. 02:03
   Duplicating Constraints

   When you duplicate a "constraint owner," Rive automatically duplicates the constraint as well, linking both new objects to the same original target.

Notes About Current Rive

• Decimal Representation: Scale values are treated as decimals in the constraint settings (1.0 = 100%).
• Reference Space: You can change the reference space used for calculations, which is useful when working with nested groups or complex hierarchies.
• Synchronization: Scale constraints are ideal for maintaining proportional relationships between multiple UI elements or character features without manual keyframing.