[WIP] Digital Being - Texture v1
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In this document, we make the high-level pitch of Digital Being Anatomy v1 (https://blog.sprited.ai/digital-being-anatomy-v1) concrete by translating it into an implementable system.
We define the core data representations, encoding schemes, and rendering pipeline required to construct a digital being from first principles.
Requirements: At high level, we need to be able to construct visually convincing image of character given set of textures that describe the internals of the character.
Constraints: Initially the character starts as a single pixel and eventually becomes a fully humanoid character only using local rules within shader.
The Atlas: The atlas is 128x128 texture maps that describe the character. It contains 64 patches of the character. Each patch defines one part of character.
Patch Naming Scheme: Patch 0 is the first top left 16x16 patch. Patch 1 is the one below. Patch 8 is the one to the right of Patch 0.
Reserved cells in Patches: To make centering easier, we reserve 0-th row and 0th-column for something else in the future. All growth happens within the grid except those spots. For example, center of 16x16 is going to be 8th row and 8th column.
Patch 0: First patch is reserved for metadata, and isn't used in v1.
Patch 1: Contains the Head cells. In particular, it will contain a vertical line segment where each cell in the line contains thickness value. For simplicity, we user 4x4 patch in this document.
SOCKET_ID (uint 5bit)
0 1 2 3
0 | | | | |
1 | | | | |
2 | | | 1 | |
3 | | | | |
SOCKET_Z (float)
0 1 2 3
0 | | | | |
1 | | | | |
2 | | | 5.0 | | // +5.0 z-direction
3 | | | | |
SOCKET_DZ (float)
0 1 2 3
0 | | | | |
1 | | | | |
2 | | | 0.6 | |
3 | | | | |
CELL TYPE (uint 3bit)
0 1 2 3
0 | | | | |
1 | | | CENT | | // i.e. CENTROID
2 | | | CENT | |
3 | | | | |
DIR (uint 5bit)
0 1 2 3
0 | | | | |
1 | | | ↑ | |
2 | | | ↑ | |
3 | | | | |
DISPLACEMENT (f16)
0 1 2 3
0 | | | | |
1 | | | 0.00 | |
2 | | | 0.10 | |
3 | | | | |
THICKNESS (f16)
0 1 2 3
0 | | | | |
1 | | | 1.50 | |
2 | | | 1.40 | |
3 | | | | |
Cell Type layer describes type of cell for each slot.
Direction layer will keep the current direction of the cell.
Depth layer will tracks how much does the CENTROID cell is depressed away from the camera.
THICKNESS layer defines how much thickness we should render in pixels.
SOCKET layers give the 3D location of the socket position.
REVISION: Instead of maintaining separate layer for sockets. We create a LAYOUT patch which keeps track of SOCKETs.
-- Sprited Dev 🐛
