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https://github.com/moparisthebest/rswiki-book
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43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
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[[Category Packet]]
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[[Category Packet 317]]
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{{packet|name=Construct map region|description=Constructs a new map region from a palette of 8x8 tiles.|opcode=241|type=Variable Short|length=N/A|revision=317}}
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== Construct Map Region ==
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=== Description ===
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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.
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=== Packet Structure ===
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{| border=2
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! Data type
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! Description
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|-
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| [[Data Types#Standard data types|Short]] [[Data Types#Non Standard Data Types|Special A]]
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| The region Y coordinate (absolute Y coordinate / 8), plus 6.
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|-
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| [[#Bit block|Bit block]]
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| See below.
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| [[Data Types#Standard data types|Short]]
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| The region X coordinate (absolute X coordinate / 8), plus 6.
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|}
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==== Bit block ====
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The bit block actually contains the 'palette' of map regions to make up the new region.
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There is a loop, like this, used to construct it:
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for(int z = 0; z < 4; z++) {
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for(int x = 0; x < 13; x++) {
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for(int y = 0; y < 13; y++) {
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// data for this region
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}
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}
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}
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The individual format in each iteration of the loop is:
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* '''1 bit''' - set to 0 to indicate to display nothing, 1 to display a region
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* '''26 bits''' - if the flag above is set to 1 - region x << 14 | region y << 3
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