Clamp

What is it for?

• Keeping a value within 0–1
• Preventing positions or strengths from varying too far
• Producing a safe value that cannot exceed a lower or upper bound

Overview

A safety node that confines a number to a specified range. Values outside the range stick to the nearest endpoint. It is typically placed immediately before a parameter input so that a runaway waveform or calculation cannot break downstream processing.

Usage tips

• Choose between this node and remap by intent: Remap converts a range while preserving proportions; Clamp clips only the values outside a range. Use Clamp when values already inside the range must pass through unchanged.
• Placing the Normalized preset before opacity and other 0–1 ratio inputs is the go-to setup.
• You can also use the flattened out-of-range portions intentionally to cap a waveform and create a trapezoid-like shape.

Related nodes

• remap — convert a range by compressing or expanding it
• math_op — Min and Max can limit only one side
• expression_float — write clamp() directly in an expression

Range presets

• Normalized
  • The go-to preset for limiting a value to 0..1.
• SignedNormalized
  • Suited to signed strengths such as -1..1.
• Percent
  • Suited to percentage values from 0..100.
• Count
  • Suited to counts or step counts from 1..16.
• PixelOffset
  • Suited to pixel offsets from -32..32.
• LargeOffset
  • Suited to larger offsets from -256..256.
• Custom
  • Use this when you want min / max to define the clamp range.

Notes

• When min > max, the node automatically swaps them before processing.
• The output port is Number, but the value currently returned at runtime is Float.
• For every preset except Custom, range_preset itself determines the evaluated clamp range. The selected preset remains authoritative even if saved data or PPL contains stale min / max values.
• min / max are evaluated as the actual bounds only in Custom mode.
• For fine adjustments, switch to Custom and use soft_min / soft_max / soft_step.

Examples

1. range_preset = Normalized
   • Quickly creates a 0.0–1.0 range.
   • Useful for limiting opacity and ratio values.
2. Keep the output of Noise Wave within 0.0–1.0
   • Useful when negative values or values above 1 must not pass downstream unchanged.
3. Pass the result of Math Op(Add) through Clamp
   • Suppresses values that have grown too large through addition.
4. Limit a value to 0–1 before Opacity
   • Keeps the opacity input within a safe range.
5. range_preset = PixelOffset
   • Quickly creates a position-correction clamp from -32..32.
6. Fix ratio inputs for Reveal or Trim to 0–1
   • Helps prevent glitches during animation.