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I'm Yiming. WellObserve is a central place for my drawings, paintings, computer programs and other weird stuff.

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✓2497

需要调色板重置（好）

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#630

Our Paint dev log

从对MyPaint研究引出

#2495

New features in v0.5

Pigment color mixer

It's possible to use different pigments to mix different colors. After launching Our Paint, all the pigment blocks are empty (shown as "?"), clicking any of them to select a pigment, then you can click and hold on the color pad to add pigments to the palette.

In the palette, click "Clear" to remove all pigments added in there. Click "Water" to add water (dilute) pigments in the palette.

If you use brushes with "Depletion Speed" Property, The scale on top of the palette view will reduce while you draw, until it's completely "depleted". Press and hold the slider or the palette itself can both "resupply brush pigments"

Both pigment pads and palette accept pressure-sensitive input, if you press it harder, then pigments will be mixed faster.

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+1	#1534	"Our Paint" software user manual

#2491

v0.5

Coming Soon

Major updates

New physics based dual component pigment canvas as default canvas type. This pigment canvas has such features:
- Color is computed with canvas reflectivity and light source spectrum.
- Every pigments has two separate spectrum for reflectance and transmittance, it can achieve all sorts of effects from opaque paints to transparent inks, it can also display the iconic hue/saturation skew effect that are present in many real paints when they are mixed with white/diluted.
- Multiple modes for displaying the canvas for video hardware that are of different specs.
- Fully compatible with existing brushes.
- Allows exporting double-resolution image for smoother feature transition using debayer algorithm, this also shows a very beautiful digital chromatic aberration.
New brush properties: "Accumulation" and "Depletion"
- "Accumulation" option only applies to pigment canvas and is only effective for pigments with transmittance components.
- "Depletion" option applies to both RGBA canvas and pigment canvas. For brushes that has a non-zero Depletion, in the case of not using nodes, the transparency of the dabs will increase as the color depletes. If nodes are used, then transparency will not be automatically affected.
- Color picker interface now has a visual "depletion" indicator strip, tapping on this indicator means to "re-ink" your brushes.
- Compatible to all existing brushes.
New Brushes:
- Oil (Specially tuned for Pigment Canvas)
- Gouache (Specially tuned for Pigment Canvas)
- Manga G Nib
- Improved some existing brushes for also using on pigment canvas
Now allows custom loaded CMYK color profile (icm/icc) for soft proofing.
- Our Paint now comes with two profiles: ISOcoated_v2_300_bas.icc and GenericCMYK.icm.
- The fixed soft proofing LUT from the last version is no longer provided.
Traditional RGBA Canvas now uses non-premultiplied alpha to record color values, this solves the problem for where on mobile devices colors can turn black if your brush dab transparency is too high. Old files are not affected and can still be worked on and saved in the old way.
Now undo also supports modifications to tool properties, like undoing edits to brush nodes.

Other improvements

Fixed the issue where there might be black/white/transparent squares on top of exported images.
Prevent saving unrecognizable file thumbnails.
Rearranged most of the settings interface, now with much better visual hierarchy.
Fixed some issues with undo, now it should be very stable.
Fixed some interface problems:
- Should show "New Brush" button when there's no brush in the list.
- Prevent crashes after moving a layer.
- Improved UI response for sliders. Also it's possible to tune sliders 10 times slower if holding Shift.
- Prevent crashes when exiting from tooltips.

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+1	#1551	Our Paint release notes

#2489

修了/增加了单实例子属性的撤销/重做支持，但是不清楚是不是能稳定工作，目前的测试看上去 ~~没有问题~~ ~~还是有问题~~ 修好了。

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#1364

LaGUI Development Log

Slowly developing...

#2488

重新做了集合筛选^↗，使 Line Art 不会筛选到实例内部集合所包含的线条，这使它在大场景下更有用

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#288

Line Art

Line Art is a feature line drawing tool I created inside Blender. It calculates and generates feature lines on geometry level.

This topic contains some work logs for Line Art. Visit Blender Developers^↗ for more information.

#2475

快要可以导出了

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#2431

Spectral mixing algorithm of Our Paint

This document describes pigment recording and display method for Our Paint v0.5.

Canvas Pigment Recording

Pigment canvas records reflectance and transmittance values in 14 spectral slices with central wavelengths at 400-686nm, a bandwidth of 22nm, 8 bits per slice (on GLES is 4 bits per slice), stored value is the power of 1/2.2 from their physical reflectance/transmittance values. It also records density factor for reflectance and transmittance spectrum, each 16 bits (on GLES is 8 bits), value is linear. Both spectrum are non-premultiplied.

 Pixels | Column              | Column + 1           |
--------|---------------------+----------------------+
 Row    | RL [0-7]            | AL [0-7]             |
--------|---------------------+----------------------+
 Row+1  | RH [8-13] | RD [15] | AH [8-13] | AD [15]  | 
--------|---------------------+----------------------|

RL/AL Records 8 short wavelengths, RH/AH 6 long wavelengths and density value that's a double wide.

Each single pixel is in RGBA16UI format, aka 4x16-bit channels, or 8x8-bit channels. Use little-endian for multiplexing.

Convert to display

Light Source
 |
 |    +--------> Result
 |    |
 |  -----Transmittance * Trans Density
 |    ^
 V    |
-----Reflectance * Reflect Density

For each layer, use the spectrum of the light source and reflectivity of pigments to calculate reflected spectrum, then multiply by transmittance to get final spectrum of this layer. Before the result is composed with the layer below, the transmittance density of the layer below is multiplied by the square of the reflectance density of this layer.

Use the 389-697nm ranged curve quantified from CIE 2006 2-degrees^↗ LMS-XYZ measurement to convert the final spectrum to XYZ, then it can be converted to any display color space.

Two display sampling method: "Simple" combines 4 pixels into 1, "Debayer" tries to interpolate actual values from near by pixels to produce a higher resolution image.

#2463

Yiming's News 05/25/2025

[Read More]

#2459

不行，还是不能fopen打开公共文件路径。。。。

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#2457

鸿蒙系统的NDK似乎比较完善了

或许可以试着写个示例

#2447

好像可以了

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	#2442	Grease Pencil & Blender Render Pass notes

#2441

像 Shawn Tan 的 Arrival 那样的形式做一个 MV 怎么样

#2429

机房操作了之后我还要重启一次才行。。。

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	#2428	SMTP 还是坏的

#2426

堆分配和释放已经做到线程里了，并且调用也没有问题了。所以总体来说最关键的部分已经完成。

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+1	#2413	Script 8 日志

#2425

Yiming's News 02/04/2025

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#2417

IVATAR80

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#2412

S8Lang

A simple embedded scripting language.

Features：

Runs on devices with 16/32/64 bit address bus width.
Very suitable for embedded devices with little memory.
No need for malloc nor C stdlib string support.
Supports memory banking to allow 16MB/16GB adressing in 16 bit address bus width with 8/16 bit extended address.
Script and C side can call each other.
Byte-code execution without name-lookup.
Runtime supports co-routine and resource recycling.
Stack based virtual machine.
Can be ported to any platforms that develops using C language.

Working in progress...

Development logs