# `GSCalcQuadraticParameters`

*Function*

## Declaration

```swift
func GSCalcQuadraticParameters(_ p1: NSPoint, _ p2: NSPoint, _ p3: NSPoint, _ a: UnsafeMutablePointer<NSPoint>, _ b: UnsafeMutablePointer<NSPoint>, _ c: UnsafeMutablePointer<NSPoint>)
```

```objc
void GSCalcQuadraticParameters(NSPoint p1, NSPoint p2, NSPoint p3, NSPoint *a, NSPoint *b, NSPoint *c);
```

```python
GSCalcQuadraticParameters(p1: NSPoint, p2: NSPoint, p3: NSPoint, a: NSPoint, b: NSPoint, c: NSPoint)
```

## See Also

### Curve Parameters and Solvers

- [`GSCalcCubicParameters`](/Core/GlyphsCore/GSCalcCubicParameters)
- [`GSSolveQuadratic`](/Core/GlyphsCore/GSSolveQuadratic)
- [`GSSolveCubic`](/Core/GlyphsCore/GSSolveCubic)
- [`GSDividLineAtDistance`](/Core/GlyphsCore/GSDividLineAtDistance)
- [`GSExtendCurvePoints`](/Core/GlyphsCore/GSExtendCurvePoints)
- [`GSFitCurveToOriginPoints`](/Core/GlyphsCore/GSFitCurveToOriginPoints)
- [`GSFitCurveToOriginPointsDirection`](/Core/GlyphsCore/GSFitCurveToOriginPointsDirection)
- [`GSCurveIsFlat`](/Core/GlyphsCore/GSCurveIsFlat)
- [`GSCurveIsFlatError`](/Core/GlyphsCore/GSCurveIsFlatError)