Density

Strategy module: appdimens_density · part of the AppDimens Flutter family

What it is

Scales by the physical density ratio (dpi / 160), aligning sizes with the device's pixel density instead of its window size.

Calculation used

$\text{text} \text{out} = \text{b} \times (\text{dpi} / 160) $

The px variant multiplies by density again (matching the Kotlin engine), so toPx ≈ b × density² — intentional for pixel-exact physical sizing.

How to use

import 'package:appdimens_density/appdimens_density.dart';
final size = 16.dsdp;   // density-driven

Why use it

On very dense or very sparse screens, window-based curves can misjudge physical size; Density anchors to the hardware.

When to use it

Games, camera overlays, AR markers, physical calibration UIs.

Advantages & trade-offs

✅ Advantages	⚠️ Trade-offs
Hardware-anchored · deterministic across window resizes
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Recommended usage strategy

Rare in classic app UI — reach for it when physical size matters more than layout proportions.

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AppDimens Flutter 3.2.0 — see MATHEMATICS-AND-CALCULUS.md for the formal derivation.