Feature Request: Port `turf-bezier-spline` to Mapbox Java (Android)
Nadie ha tomado este issue todavía.
- Lenguaje dominante
- Java
- Estrellas
- 438
- Forks
- 117
- Métricas de merge de PR
- Sin PR fusionados en 30 d
Descripción
Description
Currently, the Mapbox Java SDK's Turf implementation lacks the turf-bezier-spline module. This feature is readily available in both Turf.js (Web) and Turf for Swift (iOS), but Android developers are left without a native way to generate smooth Bézier curves from a LineString.
When building cross-platform applications that rely on consistent map rendering, the absence of TurfMisc.bezier() in Java forces Android developers to write custom mathematical utilities to calculate intermediate curve coordinates, rather than relying on the official Turf ecosystem.
Expected Behavior
Port the turf-bezier-spline algorithm to mapbox-java so that Android developers can pass a straight LineString with control points and receive a curved LineString or Feature in return, matching the behavior of the Web and iOS SDKs.
Example of Desired API usage (Java)
List<Point> points = Arrays.asList(
Point.fromLngLat(-122.414, 37.776),
Point.fromLngLat(-122.420, 37.780), // Control point
Point.fromLngLat(-122.425, 37.776)
);
LineString straightLine = LineString.fromLngLats(points);
// This is currently missing:
Feature curvedFeature = TurfMisc.bezier(straightLine);
Current Workaround
Manually calculating the Quadratic/Cubic Bézier mathematical formulas in a custom Java utility class, generating a dense list of Point objects, and then passing those to a standard LineString. This is inefficient and prone to projection errors compared to a dedicated Turf module.
Context
This missing feature was also noted internally by the Mapbox team in the navigation-android SDK (Issue #3018) back in 2020. Adding this would greatly improve feature parity between Mapbox's Web, iOS, and Android ecosystems.
Guía de contribución
Primeros pasos
- Lee el issue completo y luego la guía de contribución del proyecto.
- Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
- Haz un fork del repositorio y trabaja en una rama.
- Abre un pull request que haga referencia al número del issue.
Línea de trabajo
Compara las implementaciones existentes de turf-bezier-spline en Turf.js y Turf for Swift; después, inspecciona el punto de entrada TurfMisc del Java SDK. Implementa la API TurfMisc.bezier que falta para entradas de LineString y verifica que su salida curva coincida con el comportamiento de Web e iOS.
Escrito por el modelo de indexación a partir del texto del issue.
Evaluación
- Stack tecnológico
- android, java
- Área
- mobile-dev
- Tipo de issue
- Nueva funcionalidad
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Estado de actividad
- Tranquilo
- Claridad
- Bastante claro
- Aptitud para principiantes
- 55/100