Krita/GSoC2010

Pentalis

TODO to the midterm

• Fixing the current glitch with duplicated hatching
• Pressure sensitivity to make lines thicker
• Adding a mode without sub-pixel precision
• Making an intuitive GUI to let
• Pressure sensitivity to make more lines
• Ability to make crosshatching
• Enabling pressure sensitivity to create crosshatching

Roadmap:

• Finish the GUI containing all the widgets for a finished brush. Finished rc1, Evaluating design. Finish the GUI containing all widgets for a final release; crosshatching will have a prototype simplified interface.
• Clean all the code: 4 space indentation, use self-explaining long names, change class names to the definite ones, eliminate all chalk brush residuals.
• Link GUI. Only a window left.
• Implement the functions described by the GUI, from easiest to hardest or from most important to least important.
• (Most important: Scratch off algorithm not so important, the algorithm would slow down both development and the user's computer by a huge amount, this may not be implemented; stylus setting sensitivity Implemented; Hard: interval based settings this was obsoleted by a discussion in IRC I'm reconsidering this, contrary to what others may think, the need for a DISCRETE list of settings controlled by the GUI is real and not perceived, the tool can only reach its full potential in that way).

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Currently doing:

• Considering how to approach impasto.
• Finishing the hatching brush. Fixing small remaining bugs.
• Intoxicating with yoghurt
• Heading to sleep after a long day of doing interesting things and learning, see today's commit 00:02, 27 June 2010 (PDT)
• Linking the last bits of GUI 11:39, 21 June 2010 (PDT)
• Linking the GUI 05:19, 18 June 2010 (PDT)
• Learning how to link new GUI widgets to the general config widget: the basic curve dialog and the BrushTip dialog. 07:08, 17 June 2010 (PDT)

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Roadmap for Impasto:

• Bumpmapping algorithm: Allow multiple light sources.
• Test point: take a greyscale Krita layer acting as a heightmap and bumpmap it.
• Create a heightmap-enabled colorspace. Ugly and hacky at the moment.
• Bumpmapping algorithm: Allow illumination to work with different color spaces (use simple, hackish, temporary solution).
• Test point: take a Krita layer with a heightmap-enabled colorspace, save the impasted projection.
• Create or patch a paintop to be able to write to the heightmap ("The fifth channel").
• Integrate the class into Krita runtime through a hidden or visible experimental layer, celebrate with champagne when it works.
• Create a basic GUI to let the user control light sources and impasto behavior.
• Device a method to allow all relevant paintops to write to the impasto channel (This point may be extended later).
• Pretty Gimmick: Find the perfect heightmap to cause circles to look like semispheres and the impasto settings to make them look like droplets of water or a similar good-looking effect. Ask LukasT to make the spray brush able to create such droplets.
• Bumpmapping algorithm: Speed enhancements.
  • Optimize cross products.
  • Optimize the algorithm itself.
  • Optimize colorspace interaction.

Note: When I made this roadmap, I really had no idea of the difficulties I had to face. Speed was really, really important and nowhere in this list I took that into account. Anyway, speed is a solved matter, so here I go: SPEED