Armature drawing code refactor #106232

Manually merged
Sybren A. Stüvel merged 3 commits from dr.sybren/blender:anim/armature-drawing-refactor into main 2023-07-21 15:04:10 +02:00

Refactor of the armature drawing code. This PR introduces a strategy pattern for the implementation of the various armature drawing modes. Instead of having to switch (arm->drawtype) everywhere, one function is used to select the appropriate ArmatureBoneDrawStrategy subclass.

In the future this class could be expanded even further. Currently there are still places where there are explict checks for the draw type, making it cumbersome to add new types. For now I feel it's already a good enough move forward; future extensions can be done in later PRs.


#106230 introduces a new armature draw type, using this new strategy pattern. To be able to build it, it also contains the code from (an older version of) this PR.

Refactor of the armature drawing code. This PR introduces a [strategy pattern](https://en.wikipedia.org/wiki/Strategy_pattern) for the implementation of the various armature drawing modes. Instead of having to `switch (arm->drawtype)` everywhere, one function is used to select the appropriate `ArmatureBoneDrawStrategy` subclass. In the future this class could be expanded even further. Currently there are still places where there are explict checks for the draw type, making it cumbersome to add new types. For now I feel it's already a good enough move forward; future extensions can be done in later PRs. ------------- #106230 introduces a new armature draw type, using this new strategy pattern. To be able to build it, it also contains the code from (an older version of) this PR.
Sybren A. Stüvel added 2 commits 2023-03-28 17:13:56 +02:00
Sybren A. Stüvel added the
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Animation & Rigging
label 2023-03-28 17:14:08 +02:00
Sybren A. Stüvel added this to the Animation & Rigging project 2023-03-28 17:14:13 +02:00
Sybren A. Stüvel requested review from Christoph Lendenfeld 2023-03-28 17:16:53 +02:00
Sybren A. Stüvel requested review from Nate Rupsis 2023-03-28 17:17:03 +02:00

Really liking the changes to the code. A lot clearer what's going on

I assume the Sphere drawing mode should also work in edit mode? Currently it draws the default bone

Really liking the changes to the code. A lot clearer what's going on I assume the Sphere drawing mode should also work in edit mode? Currently it draws the default bone
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Really liking the changes to the code. A lot clearer what's going on

👍

I assume the Sphere drawing mode should also work in edit mode? Currently it draws the default bone

That's for #106230, but no, for now sphere drawing mode won't work in edit mode. The problem is that for edit mode to work well, you need access to the bone tail, roll, etc.

A solution that was discussed is to draw the octo's in the spheres edit mode, as additional 'ghosts' next to the spheres. For this I feel more of the drawing code should be moved into the ArmatureBoneDrawStrategy classes, or ArmatureDrawContext could use some refactoring. Currently the drawing code is IMO still too linked to the drawing mode.

> Really liking the changes to the code. A lot clearer what's going on :+1: > I assume the Sphere drawing mode should also work in edit mode? Currently it draws the default bone That's for #106230, but no, for now sphere drawing mode won't work in edit mode. The problem is that for edit mode to work well, you *need* access to the bone tail, roll, etc. A solution that was discussed is to draw the octo's in the spheres edit mode, as additional 'ghosts' next to the spheres. For this I feel more of the drawing code should be moved into the `ArmatureBoneDrawStrategy` classes, or `ArmatureDrawContext` could use some refactoring. Currently the drawing code is IMO still too linked to the drawing mode.
Sybren A. Stüvel force-pushed anim/armature-drawing-refactor from 9c91f236fa to d93b3f7b78 2023-07-21 12:33:57 +02:00 Compare
Sybren A. Stüvel force-pushed anim/armature-drawing-refactor from d93b3f7b78 to 3524e97955 2023-07-21 12:37:14 +02:00 Compare
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I just force-pushed just the code refactor; the addition of sphere drawing mode will be left to another PR. That way this is just a non-functional refactor patch.

I just force-pushed just the code refactor; the addition of sphere drawing mode will be left to another PR. That way this is just a non-functional refactor patch.
Sybren A. Stüvel changed title from WIP: Armature drawing code refactor to Armature drawing code refactor 2023-07-21 12:41:41 +02:00
Christoph Lendenfeld approved these changes 2023-07-21 14:53:44 +02:00
Christoph Lendenfeld left a comment
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lgtm. Just a function name that I think could be more descriptive

lgtm. Just a function name that I think could be more descriptive
@ -96,0 +128,4 @@
const int select_id) const = 0;
/** Should the relationship line between this bone and its parent be drawn? */
virtual bool use_bone_relation_to_parent(const EditBone *ebone,

not sure about the function name. "use" is raising the question what it is used for.
The comment explains it but I think calling it e.g. should_draw_relation_to_parent would make it clear within the function name itself

not sure about the function name. "use" is raising the question what it is used for. The comment explains it but I think calling it e.g. `should_draw_relation_to_parent` would make it clear within the function name itself
dr.sybren marked this conversation as resolved
Sybren A. Stüvel added 1 commit 2023-07-21 14:58:24 +02:00
Sybren A. Stüvel added 1 commit 2023-07-21 15:00:58 +02:00
Sybren A. Stüvel manually merged commit f645130465 into main 2023-07-21 15:04:10 +02:00
Sybren A. Stüvel removed this from the Animation & Rigging project 2023-09-14 15:05:25 +02:00
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