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Categories: Geometry, Graphics.
Geometry
Tip #1: Minimum distance
between a point and a line
The code in this tip shows possibly the fastest way to find the minimum
distance between a point and a line. This code is useful if you want to
detect when a mouseclick is near a line, like when selecting line elements
in vector graphics or mapping applications.
Source included (D1-D7)
Graphics
Tip #2: How to draw
anti-aliased circles and disks
This tip shows how to draw circles and disks without using the Windows
GDI subsystem, but rather direct pixel access. Learn how to draw them
with floating point precision and configurable anti-aliasing.
Source, demo project and executable included (D5-D7)
Tip #3: Drawing Bezier
curves with just enough segments
This tip shows how to divide a Bezier curve in individual line segments
of known minimum length to optimize the number of segments used. Use the
code to draw your own Bezier curves in GIS applications.
Source, demo project and executable included (D5-D7)