Circle Drawing and Geometry Guide¶

Circle Fundamentals¶

Circles are defined by their center point and a radius. The BareMetal graphics library provides efficient rendering functions for both circle outlines and filled circles. These functions are optimized for embedded displays.

Circle Structure¶

Each circle is represented by:

A center point (CFBDGraphic_Point) specifying the circle's location
A radius (SizeBaseType) in device coordinate units

Rendering Algorithms¶

Implementations typically use the Midpoint Circle Algorithm (Bresenham's circle algorithm) for efficient rasterization:

Minimizes floating-point operations
Generates anti-aliased appearance on pixel grids
Scales well for circles of any size

Common Use Cases¶

UI buttons with circular shapes
Radar displays and gauges
Particle effects and animations
Collision detection debugging
Indicator lights and status displays

Updated on 2026-02-03 at 13:21:55 +0000