Use numeric field expressions

Numeric field inputs accept:

• Positive and negative numbers. Some properties might limit the range. For example, RGB values can’t be negative.
• Mathematical expressions.
• Special functions for multiple selections.

Use mathematical expressions

You can use a mathematical expression to calculate the value of a numeric field.

For example, if you enter 2+3, the field calculates the value 5 and uses it. When you change focus away from the field, the field refreshes and shows the calculated value.

For more information about supported expressions, refer to ExpressionEvaluator.

Use special functions

You can use special functions to edit multiple selected objects at once. For example, a linear ramp can distribute the selected objects along an axis.

Note: Constrain Proportions Scale doesn’t support math mathematical for multi-selection.

Linear

For a linear ramp between a and b, use L(a,b).

Random

For random values between a and b, use R(a,b).

Assign

To modify the current values, use the +=, -=, *=, and /= expressions. For example, to double the field’s value for all selected objects, enter *=2.

Combine expressions

You can use mathematical expressions in function. For example, the expression L(0,2*pi) produces a linear distribution of values between 0 and 2pi.

The following examples uses the linear ramp function as the argument in sine and cosine functions in the X and Z fields. This distributes the objects in a circle:

Use expressions in custom editors

When you create custom editors, support for numeric expressions are automatically available in all EditorGUI.PropertyField and EditorGUILayout.PropertyField properties that have a numerical value.

Additional resources

• Inspect scripts
• Custom editors
• ExpressionEvaluator reference
• EditorGUI.PropertyField reference
• EditorGUILayout.PropertyField reference