Difference between revisions of "Atomic (RW Section)"
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| − | {{RW Section|Atomic| | + | {{RW Section |
| + | | NAME = Atomic | ||
| + | | VENDORNAME = Criterion Games | ||
| + | | MODULENAME = Core | ||
| + | | MODULEID = 000000 | ||
| + | | IDENTIFIER = 14 | ||
| + | | PARENTS = [[Clump (RW Section)|Clump]] | ||
| + | | CHILDREN = [[Struct (RW Section)|Struct]], [[Geometry (RW Section)|Geometry]] ''([[Atomic (RW Section)#Nested Geometry|optional]])'' | ||
| + | | EXTENSIONS = [[Right To Render (RW Section)|Right To Render]], [[Particles PLG (RW Section)|Particles PLG]], [[Pipeline Set (RW Section)|Pipeline Set]], [[User Data PLG (RW Section)|User Data PLG]], [[Material Effects PLG (RW Section)|Material Effects PLG]] | ||
| + | }} | ||
| − | '''Atomic''' is a container section used in [[model file|DFF files]] as child of a [[Clump (RW Section)|Clump]] section. It is normally accompanied by a [[Struct (RW Section)#Atomic|Struct]] section. An atomic section can associate a Frame with a Geometry. | + | '''Atomic''' is a container section used in [[model file|DFF files]] as child of a [[Clump (RW Section)|Clump]] section. It is normally accompanied by a [[Struct (RW Section)#Atomic|Struct]] section. An atomic section can associate a [[Frame List (RW Section)|Frame]] with a [[Geometry (RW Section)|Geometry]]. |
| − | == | + | Atomics are - generally speaking - converted to draw-calls directly. They therefor resemble parts of the geometry (sub-geometries) that should be rendered "as one", utilizing a certain rendering pipeline. They are transformed from object-space directly or indirectly based on the transformation rules that are set for the Frame. |
| − | + | ||
| − | + | ==Structure== | |
| − | + | ||
| − | + | An atomic section contains Struct, Geometry (optional) and Extension sections. | |
| + | A Struct section has 16 bytes in size (may be different in some RW versions). | ||
| + | |||
| + | <source lang="c"> | ||
| + | struct rwAtomicStruct { | ||
| + | unsigned int frameIndex; // Index of the frame within the clump's frame list. | ||
| + | unsigned int geometryIndex; // Index of geometry within the clump's geometry list. | ||
| + | unsigned int flags; // See below. | ||
| + | unsigned int unused; // Typically 0. | ||
| + | }; | ||
| + | </source> | ||
| + | |||
| + | ====Flags==== | ||
| + | |||
| + | There are only 2 options available: | ||
| + | |||
| + | 0x01 rpATOMICCOLLISIONTEST - A generic collision flag to indicate that the atomic should be considered in collision tests. | ||
| + | It wasn't used in GTA games since they don't use RW collision system. | ||
| + | 0x04 rpATOMICRENDER - The atomic is rendered if it is in the view frustum. It's set to TRUE for all models by default. | ||
| + | |||
| + | ==Nested Geometry== | ||
| + | |||
| + | An atomic may contain a [[Geometry (RW Section)|geometry]] as a child section. It may exist only if [[Clump (RW Section)|Clump]]'s [[Geometry List (RW Section)|Geometry List]] is empty. | ||
| + | |||
| + | {{N|SA|VC|3}} | ||
Latest revision as of 11:56, 11 September 2020
| Atomic | |
|---|---|
| RenderWare Stream Section | |
| Vendor | Criterion Games |
| Module | Core |
| Module ID | 0x000000
|
| Identifier | 0x14
|
| Chunk ID | 0x00000014
|
| Versions | All |
| Hierarchy | |
| Parents: Clump | |
| Children: Struct, Geometry (optional) | |
| Extensions: Right To Render, Particles PLG, Pipeline Set, User Data PLG, Material Effects PLG | |
| File Format | |
Atomic is a container section used in DFF files as child of a Clump section. It is normally accompanied by a Struct section. An atomic section can associate a Frame with a Geometry.
Atomics are - generally speaking - converted to draw-calls directly. They therefor resemble parts of the geometry (sub-geometries) that should be rendered "as one", utilizing a certain rendering pipeline. They are transformed from object-space directly or indirectly based on the transformation rules that are set for the Frame.
Structure
An atomic section contains Struct, Geometry (optional) and Extension sections. A Struct section has 16 bytes in size (may be different in some RW versions).
struct rwAtomicStruct {
unsigned int frameIndex; // Index of the frame within the clump's frame list.
unsigned int geometryIndex; // Index of geometry within the clump's geometry list.
unsigned int flags; // See below.
unsigned int unused; // Typically 0.
};Flags
There are only 2 options available:
0x01 rpATOMICCOLLISIONTEST - A generic collision flag to indicate that the atomic should be considered in collision tests.
It wasn't used in GTA games since they don't use RW collision system.
0x04 rpATOMICRENDER - The atomic is rendered if it is in the view frustum. It's set to TRUE for all models by default.
Nested Geometry
An atomic may contain a geometry as a child section. It may exist only if Clump's Geometry List is empty.
