317:Construct map region
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Jump to navigationJump to searchConstruct map region Constructs a new map region from a palette of 8x8 tiles. | |
Opcode | 241 |
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Type | Variable Short |
Length | N/A |
Construct Map Region
Description
The construct map region packet sends a dynamic map region that is constructed by using groups of 8*8 tiles. It is generally used for instanced areas, such as fight caves, and in later revisions, player owned houses.
Packet Structure
Data type | Description |
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Short Special A | The region Y coordinate (absolute Y coordinate / 8), plus 6. |
Bit block | See below. |
Short | The region X coordinate (absolute X coordinate / 8), plus 6. |
Bit block
The bit block actually contains the 'palette' of map regions to make up the new region.
There is a loop, like this, used to construct it:
for(int z = 0; z < 4; z++) { for(int x = 0; x < 13; x++) { for(int y = 0; y < 13; y++) { // data for this region } } }
The individual format in each iteration of the loop is:
- 1 bit - set to 0 to indicate to display nothing, 1 to display a region
- 26 bits - if the flag above is set to 1 - region x << 14 | region y << 3