CGLineJoinMiter

CGLineJoinMiter is a constant used in graphics programming, specifically within Apple's Core Graphics framework. It defines how line segments join at a vertex. When drawing a path with connected line segments, the points where these segments meet are called vertices. The style of the join at these vertices can be controlled. CGLineJoinMiter is one of the three possible join styles, along with CGLineJoinRound and CGLineJoinBevel.

When CGLineJoinMiter is applied, the line segments are extended beyond their intersection point to form a sharp, pointed corner. The length of this extension is determined by the miter limit. If the miter length exceeds the specified miter limit, the join will be automatically converted to a bevel join to prevent excessively long and thin spikes. This miter join style is often used to create sharp, angular appearances in drawings, such as the corners of polygons or star shapes. The visual result is a clean, precise intersection of lines that maintains the original angle of the path. It's important to consider the miter limit to ensure that the rendered joins are aesthetically pleasing and do not become distorted at very acute angles.