UE4 SDF Importers / Generators for SVG and Bitmaps

NOTE: This module is very much work in progress / preview and likely to change Uses MSDFGen for processing of SVG files

1. Clone this repository into MyUE4Project/Plugins/RTMSDF or MYUE4Project/Plugins/RTM/RTMSDF
2. Compile for Editor as usual and launch
3. Check Project Settings -> Plugins -> RTM SDF for the important settings

• SVG Filename Suffix - .svg source files with this suffix will be imported and converted to MSDF, i.e. T_MyFancyIcon_SDF.svg
• Bitmap Filename Suffix - bitmap files (.png, .psd, .bmp etc.) with this suffix will be imported and converted to SDF files, i.e. T_MyLessFancyIcons_SDF.psd
• SVG Import settings are related to MSDFGen - see MSDFGen for details - can be overridden for individual files
• Bitmap Default Import Settings are for importing bitmaps and can be overridden for individual files

4. Create an svg file with the approriate naming and import it to unreal

• In your imported asset, under Texture -> Advanced Settings -> Asset User Data you will be able to edit import settings for your texture
• These are identical to the settings in the project settings
• Changing a setting will not automatically update the texture - you must click Reimport to see any changes

• MSDFGen only reads a single path from the SVG file - combine paths to create more complex shapes
• Overlapping shapes are not supported - I am not sure if that's on my end or on MSDFGen's end

• Bitmap import will attept to detext if your source file is single channel or multichannel however
  • However UE4 doesn't handle this well and some file types (e.g. psd) will always be rgba
  • Change the compression settings to "Grayscale" for the texture to force a single channel SDF generation
• Bitmaps have 2 RGBA modes
  • Separate Channels - each channel will be trated as a separate SDF to give multiple SDFs in a single file
  • Preserve RGB - will keep the source RGB channels and produce a sdf on the alpha channel (this does not work very well right now)