CGFX: Difference between revisions

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 Every texture format has its texture data divided into 8x8 tiles. See [[SMDH#Icon_graphics|SMDH]] for more information.
 ETC1 is a compressed texture format which compresses blocks of 4x4 pixels into u64s. These u64 are traditionally stored in big endian; however, nintendo's implementation stores them in little endian. ETC1 textures are stored in 8x8 tiles; decompressed 4x4 therefore have to be organized accordingly. See [https://gist.github.com/smealum/8897237] for implementation example.
+== Skeleton data ==
+Skeleton data is stored in an array. Each entry is 0xE0 bytes in length and organized this way :
+{| class="wikitable"
+|-
+! Offset
+! Length
+! Description
+|-
+| 0x0
+| 0x4
+| Offset (self relative) to name symbol
+|-
+| 0x8
+| 0x4
+| Joint ID
+|-
+| 0xC
+| 0x4
+| Parent joint ID
+|-
+| 0x10
+| 0x4
+| Signed offset (self-relative) to parent joint
+|-
+| 0x2C
+| 0xC
+| Angle vector (floats, x, y, z)
+|-
+| 0x38
+| 0xC
+| Position vector (floats, x, y, z)
+|-
+| 0x44
+| 0x30
+| Transformation matrix (4x3)
+|-
+| 0x70
+| 0x30
+| Identity matrix ? (4x3)
+|}
+Each entry stores the joint transformation data twice; once as angle/position vectors and once as a transformation matrix. Each entry also stores a second matrix which appears to always be identity. (?)
 == CANM ==
 CANMs are used to store skeletal animation data.