Texture Panel Repeats per meter improvements and PBR feature

[Hecklezz]

PR with all 3 improvements/feature- #3973

Features/Enhancements

1. Currently PBR does not have the ability to do repeats per meter

   • This functionality allows scaling of the different texture types much more easily based on a per meter scale. Blinn Phong already has this and it saves time compared to adjusting both the horizontal and vertical scale separately.

2. Currently adjusting normal and specular scale on Blinn Phong with repeats per meter does not respect the size of the face the texture is on, and bases it off whatever the first face is that is currently selected (so if the entire object is selected, that's face 0)

   • This creates an issue where attempting to use repeats per meter to adjust the normal or specular on more than 1 face at a time results in it not scaling correctly if the faces of the object are not of the same size. Diffuse is not affected by this as it does correctly scale with repeats per meter based off per face's size. This will allow normal and specular to be consistent with how diffuse functions.

3. Currently adjusting repeats per meter while either scale spinner box is focused, will result in that spinner value not updating while you change the repeats per meter (with the exception of Diffuse vertical scale with works correctly).

   • This creates a UX issue where you would expect the scale values to update appropriately as you adjust the repeats per meter, but if a scale spinner is focused, the user may think the values aren't updating but they are, just not visually on the spinner until they focus a different control. This will allow the UI to correctly display the updated values as you change the repeats per meter and improve the UX.

Test Plan

1. In order to test this, objects with faces of different sizes need to be created with textures applied to each channel for visual testing purposes.
2. For both PBR and BP, using repeats per meter for all the different texture channels need to be tested and visually checked for all faces of the object, to ensure they display correctly.
3. The texture panel UI needs to be checked that all controls are updating and displaying the right values after the improvements.

Videos of current behaviour

1. PBR Repeats per meter- No video since it just isn't implemented at all in the current viewer.

2. BP adjusting normal and specular with repeats- As you can see in the video, certain faces of the two different sized objects have their normal and specular scaled incorrectly after being changed by repeats per meter. The diffuse however correctly scaled, and was working as intended.

   • Normal and Specular NOT correctly scaling with repeats per meter

3. BP adjusting repeats per meter while either scale spinner is focused- As you can see in the video for all scale controls except diffuse vertical, while they are focused and you adjust the repeats per meter, their value remains unchanged until you unfocus the control by focusing another.

   • Scale controls NOT updating if focused

[AtlasLinden]

Reopening for testing

[AtlasLinden]

1. Repeats per meter now exists for PBR Materials and works as expected! This is also verified on each material radio button (Complete material, Base color, etc.)

2. Previously, the repeats per meter would adjust itself after editing the repeats per meter action on each face https://gyazo.com/b980518429c7acc352f49a6cc9ab9b88
   This no longer occurs!
   The repeats per meter function for normal maps now behave the same as diffuse.
   Specular maps also appear to work the same except for when a normal map is NOT applied. In this case the UI automatically resets to the diffuse repeats per meter.
   For instance, if I set the repeats per meter to 5, the UI automatically is set back to the diffuse value of 2. The given specular value is still applied. https://gyazo.com/77a461ceea4ab667b18211ce2e6d74ba.
   This does not reproduce on earlier builds. A separate issue has been made for this here: Specular repeats per meter follows diffuse value #4349
   The repeats per meter spinners also do not appear to work in this case.
   The Select Face option for specular, also appears to still highlight the diffuse repeats if no normal map is applied. A separate issue has been made for this here as this does reproduce on previous builds: Specular map highlights not shown while a normal is not applied #4350
   https://gyazo.com/fdabeb5104b9ec391191eeded3008c74

3. The spinners appear to work except for specular when a normal map isn't applied.

Passing QA regardless of the one new issue (new = does not repro on older builds) mentioned above as there is more good here than bad. Thanks for the fix/es, Hecklezz!
Verified on Second Life Project 7.1.14.15976006598 (GLTF Mesh Import) on Win11/MacOS.

[AtlasLinden]

Further testing shows that removing a specular map while a normal is applied can show very fun highlights

This reproduces on earlier builds. A new issue has been made for this here: #4351