Comparison Operation¶
Performs numeric comparisons and basic bound operations between two values. Supports min/max selection, clamping, and relational checks with a small float tolerance for equality. Returns both a numeric result and a boolean flag indicating the outcome for comparison modes.
Usage¶
Use this node when you need to compare two numeric values, select a minimum/maximum, clamp a value within bounds, or branch logic based on relational conditions. It commonly precedes conditional routing, thresholding, or normalization steps where a numeric pass-through and a boolean decision are both useful.
Inputs¶
| Field | Required | Type | Description | Example |
|---|---|---|---|---|
| a | True | FLOAT | First numeric input used for comparison or clamping. | 0.75 |
| b | True | FLOAT | Second numeric input used for comparison against 'a'. Not used for clamp operation. | 0.5 |
| operation | True | ENUM | Select the operation to perform: min, max, clamp, equal, greater, less, greater_equal, less_equal. | greater_equal |
| clamp_min | True | FLOAT | Lower bound for clamping when operation is 'clamp'. Ignored for other operations. | 0.0 |
| clamp_max | True | FLOAT | Upper bound for clamping when operation is 'clamp'. Ignored for other operations. | 1.0 |
Outputs¶
| Field | Type | Description | Example |
|---|---|---|---|
| result | FLOAT | Numeric result of the operation. For min/max: the selected value. For clamp: the clamped 'a'. For comparisons: returns 'a' if the condition is true, else 0.0. | 0.75 |
| comparison_result | BOOLEAN | Boolean outcome of the comparison. For min/max/clamp, this is always false; for relational operations it reflects whether the condition holds. | true |
Important Notes¶
- Equality tolerance: 'equal' uses a small tolerance (approximately 1e-9) to account for floating-point precision.
- Comparison outputs: For 'equal', 'greater', 'less', 'greater_equal', and 'less_equal', the float result is 'a' when true, otherwise 0.0.
- Non-comparison modes: For 'min', 'max', and 'clamp', the boolean output is always false.
- Clamp behavior: Clamping is performed as max(clamp_min, min(a, clamp_max)). Ensure clamp_min <= clamp_max.
- Input ranges: Inputs are constrained internally to roughly [-1e10, 1e10] with a step of 0.001.
- Error handling: On invalid operation or processing errors, the node returns result=0.0 and comparison_result=false.
Troubleshooting¶
- Unexpected false on 'equal': Slight float differences may fail equality. Consider the tolerance (≈1e-9) or adjust upstream rounding.
- Clamp not working as expected: Verify that 'operation' is set to 'clamp' and that clamp_min <= clamp_max.
- Zero result on true comparison expected: Remember that for comparisons the numeric 'result' returns 'a' when true and 0.0 when false; check the boolean output for the actual condition.
- Outputs always false: Min/max/clamp operations always output false for the boolean field by design; switch to a relational operation if you need a boolean condition.
- Out-of-range inputs: Values far outside [-1e10, 1e10] may be clamped by input constraints; normalize inputs upstream if needed.