In minutes, you can create and export all 360 (one per degree of rotation) transparent 24-bit color PNGs. Optionally, using Adobe Fireworks, the video shows how to batch-translate them into 8 bit transparent PNGs for potential memory savings.
- Creating the gauge’s needle in Adobe Illustrator
- Exporting, using a handy Illustrator script (see below), all 360 rotated versions in seconds to 24-bit PNGs with transparency
- Batch translating the images in Fireworks to 8-bit PNGs with transparency
Adding the Script to Illustrator
Just unzip and copy the download attachment of this appnote into your Adobe Illustrator scripts directory (e.g. C:\Program Files\Adobe\Adobe Illustrator CS6 (64 Bit)\Presets\en_US\Scripts). Then it will be available in Illustrator under File->Scripts->Save360PNGs.