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Difference between revisions of "SCUMM/Technical Reference/Script resources"
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SCUMM/Technical Reference/Script resources (view source)
Revision as of 02:18, 16 May 2009
, 02:18, 16 May 2009→Object Scripts in V3/4 (OC): Filled out unknowns based on object.cpp/ScummEngine_v4::resetRoomObject
Jestar jokin (talk | contribs) (Added info to v3/4 script blocks, clarified table entries & other bits.) |
Jestar jokin (talk | contribs) (→Object Scripts in V3/4 (OC): Filled out unknowns based on object.cpp/ScummEngine_v4::resetRoomObject) |
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Block name 2 bytes ("OC") | Block name 2 bytes ("OC") | ||
Object ID 2 bytes (LE) | Object ID 2 bytes (LE) | ||
unknown | unknown 1 byte | ||
x pos 1 byte | |||
y pos, par. state 1 byte | |||
image width / 8 1 byte | image width / 8 1 byte | ||
parent 1 byte | |||
height | walk_x 2 bytes (LE) | ||
walk_y 2 bytes (LE) | |||
height, actor dir 1 byte | |||
name offset 1 byte | name offset 1 byte | ||
offset table variable { | offset table variable { | ||
| Line 110: | Line 114: | ||
This block contains all object data except for the actual image bitmap. Compare this to V5+ objects, where metadata is split into seperate CDHD and OBNA blocks. | This block contains all object data except for the actual image bitmap. Compare this to V5+ objects, where metadata is split into seperate CDHD and OBNA blocks. | ||
Image width is given in strips, which are 8 pixels wide. Name offset is the absolute offset of object name (or, if you prefer, the position after table end). | Image width is given in strips, which are 8 pixels wide. The high bit of y pos is used to store the parent's state (0 or 1). Both x pos and y pos will be multiplied by 8 by the interpreter. The lower three bits (mask 0x07) of height are used to store actor dir. Name offset is the absolute offset of object name (or, if you prefer, the position after table end). | ||
The offset table is a variable block like that used in the VERB block in later games, which contains the verb identifier (1 byte) and the absolute offset (2 bytes). The table end is marked with 0x00. Next is the object's name, which is a standard null-terminated string. After this follows the actual object code. Note that unlike other script types, because there are multiple entry points (one for each supported verb), there are also multiple exit points (or "stopObjectCode" instructions). | The offset table is a variable block like that used in the VERB block in later games, which contains the verb identifier (1 byte) and the absolute offset (2 bytes). The table end is marked with 0x00. Next is the object's name, which is a standard null-terminated string. After this follows the actual object code. Note that unlike other script types, because there are multiple entry points (one for each supported verb), there are also multiple exit points (or "stopObjectCode" instructions). | ||