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ecs branch
This commit is contained in:
Steven Hugg
parent
0784eb8f77
commit
3f87b5dbb8
672
src/common/ecs/ecs.ts
Normal file
672
src/common/ecs/ecs.ts
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@ -0,0 +1,672 @@
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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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//
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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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//
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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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export interface Entity {
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id: number;
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etype: EntityArchetype;
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consts: {[name: string]: DataValue};
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}
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export interface EntityConst {
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component: ComponentType;
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name: string;
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value: DataValue;
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}
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export interface EntityArchetype {
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components: ComponentType[];
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}
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export interface ComponentType {
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name: string;
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fields: DataField[];
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optional?: boolean;
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}
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export interface Query {
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include: string[];
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listen?: string[];
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exclude?: string[];
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updates?: string[];
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}
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export interface System {
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name: string;
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query: Query;
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tempbytes?: number;
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actions: CodeFragment[];
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emits?: string[];
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live?: EntityArchetype[] | null;
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}
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export interface CodeFragment {
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text: string;
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event: string;
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iterate: 'once' | 'each'
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}
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export type DataValue = number | boolean | Uint8Array;
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export type DataField = { name: string } & DataType;
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export type DataType = IntType | ArrayType | RefType;
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export interface IntType {
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dtype: 'int'
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lo: number
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hi: number
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}
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export interface ArrayType {
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dtype: 'array'
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elem: DataType
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index?: DataType
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}
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export interface RefType {
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dtype: 'ref'
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query: Query
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}
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interface FieldArray {
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component: ComponentType;
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field: DataField;
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elo: number;
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ehi: number;
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access?: FieldAccess[];
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}
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interface FieldAccess {
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symbol: string;
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bit: number;
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width: number;
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}
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interface ConstByte {
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symbol: string;
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bitofs: number;
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}
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class SourceFileExport {
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lines : string[] = [];
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comment(text: string) {
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this.lines.push(';' + text);
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}
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segment(seg: string, segtype: 'rodata' | 'bss') {
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if (segtype == 'bss')
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this.lines.push(` seg.u ${seg}`);
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else
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this.lines.push(` seg ${seg}`);
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}
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label(sym: string) {
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this.lines.push(`${sym}:`);
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}
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byte(b: number | ConstByte | undefined) {
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if (b === undefined) {
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this.lines.push(` .ds 1`);
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} else if (typeof b === 'number') {
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if (b < 0 || b > 255) throw new Error(`out of range byte ${b}`);
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this.lines.push(` .byte ${b}`)
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} else {
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this.lines.push(` .byte (${b.symbol} >> ${b.bitofs}) & 0xff`)
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}
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}
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toString() {
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return this.lines.join('\n');
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}
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}
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class Segment {
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symbols: {[sym: string]: number} = {};
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ofs2sym = new Map<number,string[]>();
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fieldranges: {[cfname: string]: FieldArray} = {};
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size: number = 0;
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initdata: (number | ConstByte | undefined)[] = [];
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allocateBytes(name: string, bytes: number) {
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let ofs = this.size;
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this.symbols[name] = ofs;
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if (!this.ofs2sym.has(ofs))
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this.ofs2sym.set(ofs, []);
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this.ofs2sym.get(ofs)?.push(name);
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this.size += bytes;
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return ofs;
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}
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// TODO: optimize shared data
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allocateInitData(name: string, bytes: Uint8Array) {
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let ofs = this.allocateBytes(name, bytes.length);
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for (let i=0; i<bytes.length; i++) {
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this.initdata[ofs + i] = bytes[i];
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}
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}
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dump(file: SourceFileExport) {
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for (let i=0; i<this.size; i++) {
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let syms = this.ofs2sym.get(i);
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if (syms) {
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for (let sym of syms) file.label(sym);
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}
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file.byte(this.initdata[i]);
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}
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}
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}
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function getFieldBits(f: IntType) {
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let n = f.hi - f.lo + 1;
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return Math.ceil(Math.log2(n));
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}
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function getPackedFieldSize(f: DataType, constValue?: DataValue): number {
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if (f.dtype == 'int') {
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return getFieldBits(f);
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} if (f.dtype == 'array' && f.index) {
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return getPackedFieldSize(f.index) * getPackedFieldSize(f.elem);
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} if (f.dtype == 'array' && constValue != null && Array.isArray(constValue)) {
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return constValue.length * getPackedFieldSize(f.elem);
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} if (f.dtype == 'ref') {
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return 8; // TODO: > 256 entities?
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}
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return 0;
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}
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const ASM_ITERATE_EACH = `
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ldx #%{elo}
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.loop:
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%{action}
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inx
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cpx #%{ehi}+1
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bne .loop
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`;
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export class EntityScope {
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childScopes : EntityScope[] = [];
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entities : Entity[] = [];
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bss = new Segment();
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rodata = new Segment();
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code = new Segment();
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componentsInScope = new Set();
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constructor(
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public readonly em: EntityManager,
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public readonly name: string,
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public readonly parent: EntityScope | undefined
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) {
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parent?.childScopes.push(this);
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}
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newEntity(etype: EntityArchetype) : Entity {
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// TODO: add parent ID? lock parent scope?
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let id = this.entities.length;
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let entity : Entity = {id, etype, consts:{}};
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this.em.archtypes.add(etype);
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for (let c of etype.components) {
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this.componentsInScope.add(c.name);
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}
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this.entities.push(entity);
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return entity;
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}
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*iterateFields() {
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for (let i=0; i<this.entities.length; i++) {
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let e = this.entities[i];
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for (let c of e.etype.components) {
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for (let f of c.fields) {
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yield {i, e, c, f, v:e.consts[c.name + '.' + f.name]};
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}
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}
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}
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}
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analyzeEntities() {
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this.buildSegments();
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this.allocateSegment(this.bss, false);
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this.allocateSegment(this.rodata, true);
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this.allocateROData(this.rodata);
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}
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buildSegments() {
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let iter = this.iterateFields();
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for (var o=iter.next(); o.value; o=iter.next()) {
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let {i,e,c,f,v} = o.value;
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let segment = v === undefined ? this.bss : this.rodata;
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let cfname = c.name + '.' + f.name;
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let array = segment.fieldranges[cfname];
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if (!array) {
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array = segment.fieldranges[cfname] = {component:c, field:f, elo:i, ehi:i};
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} else {
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array.ehi = i;
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}
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//console.log(i,array,cfname);
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}
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}
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allocateSegment(segment: Segment, readonly: boolean) {
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let fields = Object.values(segment.fieldranges);
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fields.sort((a,b) => (a.ehi - a.elo + 1) * getPackedFieldSize(a.field));
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let f;
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while (f = fields.pop()) {
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let name = f.component.name + "_" + f.field.name;
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// TODO: doesn't work for packed arrays too well
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let bits = getPackedFieldSize(f.field);
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// variable size? make it a pointer
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if (bits == 0) bits = 16;
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let rangelen = (f.ehi - f.elo + 1);
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let bytesperelem = Math.ceil(bits/8) * rangelen;
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// TODO: packing bits
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// TODO: split arrays
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f.access = [];
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for (let i=0; i<bits; i+=8) {
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let symbol = name + '_b' + i;
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f.access.push({symbol, bit:0, width:8}); // TODO
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if (!readonly) {
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segment.allocateBytes(symbol, rangelen * bytesperelem); // TODO
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}
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}
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}
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}
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allocateROData(segment: Segment) {
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let iter = this.iterateFields();
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for (var o=iter.next(); o.value; o=iter.next()) {
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let {i,e,c,f,v} = o.value;
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let cfname = c.name + '.' + f.name;
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let fieldrange = segment.fieldranges[cfname];
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if (v !== undefined) {
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// is it a byte array?
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if (v instanceof Uint8Array) {
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let sym = c.name + '_' + f.name;
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segment.allocateInitData(sym, v);
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} else if (fieldrange.ehi > fieldrange.elo) {
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// more than one element, add an array
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// TODO
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}
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//console.log(cfname, i, v, fieldrange);
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//segment.allocateInitData(cfname, );
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}
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}
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//console.log(segment.initdata)
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}
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setConstValue(e: Entity, component: ComponentType, fieldName: string, value: DataValue) {
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e.consts[component.name + '.' + fieldName] = value;
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}
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dump(file: SourceFileExport) {
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file.segment(`${this.name}_CODE`, 'rodata');
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this.rodata.dump(file);
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file.segment(`${this.name}_DATA`, 'bss');
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this.bss.dump(file);
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}
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generateCode() {
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let code = this.generateCodeForEvent('init');
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console.log(code);
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}
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generateCodeForEvent(event: string): string {
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// find systems that respond to event
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// and have entities in this scope
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let systems = this.getSystems([event]);
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if (systems.length == 0) {
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console.log(`no system responds to ${event}`); // TODO: warning
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}
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let s = '';
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//s += `\n; event ${event}\n`;
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let emitcode : {[event: string] : string} = {};
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for (let sys of systems) {
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if (sys.emits) {
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for (let emit of sys.emits) {
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//console.log('>', emit);
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// TODO: cycles
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emitcode[emit] = this.generateCodeForEvent(emit);
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//console.log('<', emit, emitcode[emit].length);
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}
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}
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for (let action of sys.actions) {
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let code = action.text;
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if (action.event == event) {
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// TODO: find loops
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if (action.iterate == 'each') {
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let ents = this.entitiesMatching(sys.query);
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console.log(sys.name, action.event, ents);
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//frag = this.iterateCode(frag);
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}
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// TODO: better parser of ${}
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for (let [k,v] of Object.entries(emitcode)) {
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let frag = v;
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code = code.replace(`%{${k}}`, frag);
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}
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// anything not replaced?
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let unused = /\%\{.+?\}/.exec(code);
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if (unused) {
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//throw new Error(`${sys.name}:${action.event} did not replace ${unused[0]}`);
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}
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// TODO: check that this happens once?
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s += `\n; action ${sys.name}:${action.event}\n`;
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s += code;
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}
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}
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}
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return s;
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}
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entitiesMatching(q: Query) {
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let result = [];
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let atypes = this.em.archetypesMatching(q);
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for (let e of this.entities) {
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for (let a of atypes) {
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if (e.etype == a.etype)
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result.push(e);
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}
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}
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return result;
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}
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getSystems(events: string[]) {
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let result = [];
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for (let sys of Object.values(this.em.systems)) {
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if (this.systemListensTo(sys, events)) {
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result.push(sys);
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}
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}
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return result;
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}
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systemListensTo(sys: System, events: string[]) {
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for (let action of sys.actions) {
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if (action.event != null && events.includes(action.event)) {
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let archs = this.em.archetypesMatching(sys.query);
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for (let arch of archs) {
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for (let ctype of arch.cmatch) {
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if (this.hasComponent(ctype)) {
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return true;
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}
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}
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}
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}
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}
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}
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hasComponent(ctype: ComponentType) {
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return this.componentsInScope.has(ctype.name);
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}
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}
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export class EntityManager {
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archtypes = new Set<EntityArchetype>();
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components : {[name: string]: ComponentType} = {};
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systems : {[name: string]: System} = {};
|
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scopes : {[name: string]: EntityScope} = {};
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newScope(name: string, parent?: EntityScope) {
|
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let scope = new EntityScope(this, name, parent);
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if (this.scopes[name]) throw new Error(`scope ${name} already defined`);
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this.scopes[name] = scope;
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return scope;
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}
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defineComponent(ctype: ComponentType) {
|
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if (this.components[ctype.name]) throw new Error(`component ${name} already defined`);
|
||||
return this.components[ctype.name] = ctype;
|
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}
|
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defineSystem(system: System) {
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if (this.systems[system.name]) throw new Error(`system ${name} already defined`);
|
||||
this.systems[system.name] = system;
|
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}
|
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componentsMatching(q: Query, etype: EntityArchetype) {
|
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let list = [];
|
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for (let c of etype.components) {
|
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let cname = c.name;
|
||||
// TODO: 0 includes == all entities?
|
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if (q.include.length == 0 || q.include.includes(cname)) {
|
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if (!q.exclude?.includes(cname)) {
|
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list.push(c);
|
||||
}
|
||||
}
|
||||
}
|
||||
return list;
|
||||
}
|
||||
archetypesMatching(q: Query) {
|
||||
let result : {etype: EntityArchetype, cmatch: ComponentType[]}[] = [];
|
||||
this.archtypes.forEach(etype => {
|
||||
let cmatch = this.componentsMatching(q, etype);
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||||
if (cmatch.length > 0) {
|
||||
result.push({etype, cmatch});
|
||||
}
|
||||
});
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return result;
|
||||
}
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||||
emitCode(root: System) {
|
||||
}
|
||||
}
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||||
|
||||
///
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||||
|
||||
const TEMPLATE_INIT = `
|
||||
Start:
|
||||
CLEAN_START
|
||||
%{start}
|
||||
`
|
||||
|
||||
const TEMPLATE1 = `
|
||||
.NextFrame:
|
||||
lsr SWCHB ; test Game Reset switch
|
||||
bcc Start ; reset?
|
||||
VERTICAL_SYNC
|
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TIMER_SETUP 37
|
||||
%{preframe}
|
||||
TIMER_WAIT
|
||||
TIMER_SETUP 192
|
||||
%{kernel}
|
||||
TIMER_WAIT
|
||||
TIMER_SETUP 29
|
||||
%{postframe}
|
||||
TIMER_WAIT
|
||||
jmp .NextFrame
|
||||
`;
|
||||
|
||||
const TEMPLATE2 = `
|
||||
#ifdef EVENT_joyup
|
||||
lda #%00100000 ;Up?
|
||||
bit SWCHA
|
||||
bne SkipMoveUp
|
||||
%{joyup}
|
||||
.SkipMoveUp
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||||
#endif
|
||||
`;
|
||||
|
||||
const TEMPLATE3 = `
|
||||
lda %{ypos},x
|
||||
sec
|
||||
sbc #1
|
||||
bcc .noclip
|
||||
sta %{ypos},x
|
||||
.noclip
|
||||
`;
|
||||
|
||||
const TEMPLATE4_S = `
|
||||
lda %{@sprite.bitmap+0} ; bitmap address
|
||||
sta temp+0 ; temp space
|
||||
lda %{@sprite.bitmap+1} ; bitmap address
|
||||
sta temp+1 ; temp space
|
||||
`
|
||||
|
||||
const TEMPLATE4_K = `
|
||||
ldx %{kernel.numlines} ; lines in kernel
|
||||
LVScan
|
||||
txa ; X -> A
|
||||
sec ; set carry for subtract
|
||||
sbc YPos ; local coordinate
|
||||
cmp %{sprite.height} ; in sprite?
|
||||
bcc InSprite ; yes, skip over next
|
||||
lda #0 ; not in sprite, load 0
|
||||
InSprite
|
||||
tay ; local coord -> Y
|
||||
lda (temp+0),y ; lookup color
|
||||
sta WSYNC ; sync w/ scanline
|
||||
sta GRP0 ; store bitmap
|
||||
lda (temp+2),y ; lookup color
|
||||
sta COLUP0 ; store color
|
||||
dex ; decrement X
|
||||
bne LVScan ; repeat until 192 lines
|
||||
`;
|
||||
|
||||
const SET_XPOS = `
|
||||
lda %{sprite.xpos}
|
||||
ldx %(sprite.plyrindex}
|
||||
jsr SetHorizPos
|
||||
`
|
||||
|
||||
const SETHORIZPOS = `
|
||||
SetHorizPos: subroutine
|
||||
sta WSYNC ; start a new line
|
||||
SLEEP 3
|
||||
sec ; set carry flag
|
||||
SetHorizPosLoop:
|
||||
sbc #15 ; subtract 15
|
||||
bcs SetHorizPosLoop ; branch until negative
|
||||
SetHorizPosAfter:
|
||||
ASSERT_SAME_PAGE SetHorizPosLoop, SetHorizPosAfter
|
||||
eor #7 ; calculate fine offset
|
||||
asl
|
||||
asl
|
||||
asl
|
||||
asl
|
||||
sta RESP0,x ; fix coarse position
|
||||
sta HMP0,x ; set fine offset
|
||||
sta WSYNC
|
||||
Return: ; for SLEEP macro, etc.
|
||||
rts ; return to caller
|
||||
`
|
||||
|
||||
function test() {
|
||||
let em = new EntityManager();
|
||||
|
||||
let c_kernel = em.defineComponent({name:'kernel', fields:[
|
||||
{name:'lines', dtype:'int', lo:0, hi:255}
|
||||
]})
|
||||
let c_sprite = em.defineComponent({name:'sprite', fields:[
|
||||
{name:'height', dtype:'int', lo:0, hi:255},
|
||||
{name:'plyrindex', dtype:'int', lo:0, hi:1},
|
||||
{name:'flags', dtype:'int', lo:0, hi:255},
|
||||
]})
|
||||
let c_player = em.defineComponent({name:'player', fields:[
|
||||
//TODO: optional?
|
||||
]})
|
||||
let c_hasbitmap = em.defineComponent({name:'hasbitmap', fields:[
|
||||
{name:'bitmap', dtype:'ref', query:{include:['bitmap']}},
|
||||
]})
|
||||
let c_hascolormap = em.defineComponent({name:'hascolormap', fields:[
|
||||
{name:'colormap', dtype:'ref', query:{include:['colormap']}},
|
||||
]})
|
||||
let c_bitmap = em.defineComponent({name:'bitmap', fields:[
|
||||
{name:'data', dtype:'array', elem:{ dtype:'int', lo:0, hi:255 }}
|
||||
]})
|
||||
let c_colormap = em.defineComponent({name:'colormap', fields:[
|
||||
{name:'data', dtype:'array', elem:{ dtype:'int', lo:0, hi:255 }}
|
||||
]})
|
||||
let c_xpos = em.defineComponent({name:'xpos', fields:[
|
||||
{name:'xpos', dtype:'int', lo:0, hi:255}
|
||||
]})
|
||||
let c_ypos = em.defineComponent({name:'ypos', fields:[
|
||||
{name:'ypos', dtype:'int', lo:0, hi:255}
|
||||
]})
|
||||
let c_xyvel = em.defineComponent({name:'xyvel', fields:[
|
||||
{name:'xvel', dtype:'int', lo:-8, hi:7},
|
||||
{name:'yvel', dtype:'int', lo:-8, hi:7}
|
||||
]})
|
||||
|
||||
// init -> [start] -> frameloop
|
||||
// frameloop -> [preframe] [kernel] [postframe]
|
||||
|
||||
// TODO: where is kernel numlines?
|
||||
// temp between preframe + frame?
|
||||
em.defineSystem({
|
||||
name:'kernel-simple',
|
||||
tempbytes:4,
|
||||
query:{
|
||||
include:['sprite','bitmap','colormap','ypos'],
|
||||
},
|
||||
actions:[
|
||||
{ text:TEMPLATE4_S, event:'preframe', iterate:'once' },
|
||||
{ text:TEMPLATE4_K, event:'kernel', iterate:'once' },
|
||||
]
|
||||
})
|
||||
em.defineSystem({
|
||||
name:'set-xpos',
|
||||
query:{
|
||||
include:['sprite','xpos']
|
||||
},
|
||||
actions:[
|
||||
{ text:SET_XPOS, event:'preframe', iterate:'each' },
|
||||
//{ text:SETHORIZPOS },
|
||||
]
|
||||
})
|
||||
// TODO: how to have subsystems? maybe need Scopes
|
||||
// TODO: easy stagger of system update?
|
||||
// TODO: easy lookup tables
|
||||
// TODO: how to init?
|
||||
// https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/ecs_systems.html
|
||||
em.defineSystem({
|
||||
name:'init',
|
||||
emits:['start'],
|
||||
query:{
|
||||
include:[], // ???
|
||||
},
|
||||
actions:[
|
||||
{ text:TEMPLATE_INIT, event:'init', iterate:'once' }
|
||||
]
|
||||
})
|
||||
em.defineSystem({
|
||||
name:'frameloop',
|
||||
emits:['preframe','kernel','postframe'],
|
||||
query:{
|
||||
include:['kernel'], // ???
|
||||
},
|
||||
actions:[
|
||||
{ text:TEMPLATE1, event:'start', iterate:'once' }
|
||||
]
|
||||
})
|
||||
em.defineSystem({
|
||||
name:'joyread',
|
||||
query:{
|
||||
include:['player']
|
||||
},
|
||||
emits:['joyup','joydown','joyleft','joyright','joybutton'],
|
||||
actions:[
|
||||
{ text:TEMPLATE2, event:'postframe', iterate:'each' }
|
||||
]
|
||||
});
|
||||
em.defineSystem({
|
||||
name:'simple-move',
|
||||
query:{
|
||||
include:['player','xpos','ypos']
|
||||
},
|
||||
actions:[
|
||||
{ text:TEMPLATE3, event:'joyup', iterate:'each' }
|
||||
]
|
||||
});
|
||||
|
||||
let root = em.newScope("Root");
|
||||
let scene = em.newScope("Scene", root);
|
||||
let e_ekernel = root.newEntity({components:[c_kernel]});
|
||||
root.setConstValue(e_ekernel, c_kernel, 'lines', 192);
|
||||
|
||||
let e_bitmap0 = root.newEntity({components:[c_bitmap]});
|
||||
// TODO: store array sizes?
|
||||
root.setConstValue(e_bitmap0, c_bitmap, 'data', new Uint8Array([1,2,3,4,5]));
|
||||
|
||||
let e_colormap0 = root.newEntity({components:[c_colormap]});
|
||||
root.setConstValue(e_colormap0, c_colormap, 'data', new Uint8Array([1,2,3,4,5]));
|
||||
|
||||
let ea_playerSprite = {components:[c_sprite,c_hasbitmap,c_hascolormap,c_xpos,c_ypos,c_player]};
|
||||
let e_player0 = root.newEntity(ea_playerSprite);
|
||||
let e_player1 = root.newEntity(ea_playerSprite);
|
||||
|
||||
let src = new SourceFileExport();
|
||||
root.analyzeEntities();
|
||||
root.generateCode();
|
||||
root.dump(src);
|
||||
console.log(src.toString());
|
||||
}
|
||||
|
||||
test();
|
||||
9
src/common/ecs/tsconfig.json
Normal file
9
src/common/ecs/tsconfig.json
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
{
|
||||
"compilerOptions": {
|
||||
"noImplicitThis": true,
|
||||
"noImplicitAny": true,
|
||||
"preserveConstEnums": true,
|
||||
"alwaysStrict": true,
|
||||
"strictNullChecks": true,
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user