154 lines
3.5 KiB
Markdown
154 lines
3.5 KiB
Markdown
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# NOTES
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entity scopes contain entities, and are nested
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also contain segments (code, bss, rodata)
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components and systems are global
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component fields are stored in arrays, range of entities, can be bit-packed
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some values can be constant, are stored in rodata (or loaded immediate)
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optional components? on or off
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union components? either X or Y or Z...
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systems receive and send events, execute code on entities
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systems are generated on a per-scope basis
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system queries can only contain entities from self and parent scopes
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starting from the 'init' event walk the event tree
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include systems that have at least 1 entity in scope (except init?)
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when entering scope, entities are initialized (zero or init w/ data)
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to change scope, fire event w/ scope name
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- how to handle bank-switching?
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helps with:
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- rapid prototyping w/ reasonable defaults
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- deconstructing objects into arrays
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- packing/unpacking bitfields
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- initializing objects
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- building lookup tables
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- selecting and iterating objects
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- managing events
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- managing memory and scope
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- converting assets to native formats?
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- removing unused data
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it's more convenient to have loops be zero-indexed
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for page cross, temp storage, etc
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should references be zero-indexed to a field, or global?
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should we limit # of entities passed to systems? min-max
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join thru a reference? load both x and y
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code fragments can be parameterized like macros
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if two fragments are identical, do a JSR
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(do we have to look for labels?)
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should events have parameters? e.g. addscore X Y Z
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how are Z80 arrays working?
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https://forums.nesdev.org/viewtopic.php?f=20&t=14691
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https://www.cpcwiki.eu/forum/programming/trying-not-to-use-ix/msg133416/#msg133416
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how to select two between two entities with once? like scoreboard
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maybe stack-based interpreter?
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can you query specific entities? merge with existing queries?
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bigints?
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source/if query?
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only worry about intersection when non-contiguous ranges?
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crazy idea -- full expansion, then relooper
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how to avoid cycle crossing for critical code and data? bin packing
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system define order, action order, entity order, using order?
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what happens when a system must be nested inside another? like display kernels
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constants? (NTSC vs PAL)
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set operations:
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E = select entities from scope
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A intersect B
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A join B
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loop over E limit N asc/desc
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select Nth from E
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run if A intersects B (if)
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virtual machine
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- entityset stack
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- register states
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entity Foo[Bar] { }
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system FrameLoop
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end
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class StaticKernel
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locals 12
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func init ---
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lda {{$0}}
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sta {{$1}}
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---
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func display ---
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lda {{$0}}
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sta {{$1}}
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---
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end
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Game {
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superman: [Sprite, ...] {
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var xpos=12
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}
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FrameLoop {
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a: StaticKernel(lines=30,bgcolor=$30)
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b: Kernel48(...)
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c: StaticKernel(...)
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on preframe {
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}
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on display {
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}
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on postframe {
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}
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}
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}
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systems and scope same thing?
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nested systems?
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systems allocated in blocks
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entities allocated in arrays, take up 1 or more blocks
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mid-level abstraction for scopes/macros/(banks?)
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Init
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with FrameLoop do
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with StaticKernel do
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end
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ResetSwitch:
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on reset do ResetConsole
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end
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StaticKernel:
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end
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JoyButton:
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end
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end
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end
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scopes are banks!
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banks need to duplicate code and/or rodata
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- don't split critical code across banks
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need bank trampoline macro
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nested scopes for game modes? (title / demo / play)
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critical data fields
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if accessed in critical section, make critical
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ignore arrays that aren't referenced
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use DASM for multipass?
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default values for component fields
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