@polygonjs/polygonjs/src/engine/operations/_Base.ts

node-based WebGL 3D engine https://polygonjs.com

import {NodeContext} from '../../engine/poly/NodeContext';
import {ParamType} from '../../engine/poly/ParamType';
import {NodeStatesController} from '../../engine/nodes/utils/StatesController';
import {PolyScene} from '../../engine/scene/PolyScene';
import {InputCloneMode} from '../../engine/poly/InputCloneMode';
import {BaseNodeType} from '../nodes/_Base';
import {isBoolean, isNumber, isString, isArray} from '../../core/Type';
import {TypedNodePathParamValue, TypedParamPathParamValue} from '../../core/Walker';
import {Vector3} from 'three';
import {SimpleParamJsonExporterData} from '../nodes/utils/io/IOController';
import {DefaultOperationParams} from '../../core/operations/_Base';
import {OnOperationRegisterCallback} from '../poly/registers/nodes/NodesRegister';

export interface ConvertExportParamDataParams {
	paramName: string;
	paramData: SimpleParamJsonExporterData<ParamType>;
	params: DefaultOperationParams;
}

export const OPERATIONS_COMPOSER_NODE_TYPE: Readonly<string> = 'operationsComposer';

export class BaseOperation<NC extends NodeContext> {
	static type(): string {
		throw 'type to be overriden';
	}
	type() {
		const c = this.constructor as typeof BaseOperation;
		return c.type();
	}
	static onRegister: OnOperationRegisterCallback | undefined;
	static context(): NodeContext {
		console.error('operation has no node_context', this);
		throw 'context requires override';
	}
	context(): NodeContext {
		const c = this.constructor as typeof BaseOperation;
		return c.context();
	}

	static readonly DEFAULT_PARAMS: DefaultOperationParams = {};
	static readonly INPUT_CLONED_STATE: InputCloneMode | InputCloneMode[] = [];

	constructor(
		protected _scene: PolyScene,
		protected states?: NodeStatesController<NC>,
		protected _node?: BaseNodeType
	) {}
	scene() {
		return this._scene;
	}
	cook(input_contents: any[], params: object): any {}

	convertExportParamData(options: ConvertExportParamDataParams) {
		const {params, paramName, paramData} = options;
		const default_param = params[paramName];
		if (isBoolean(paramData)) {
			return paramData;
		}
		if (isNumber(paramData)) {
			if (isBoolean(default_param)) {
				// if we receive 0, it may be for a boolean param,
				// so if the default is a boolean, we convert
				return paramData >= 1 ? true : false;
			} else {
				return paramData;
			}
		}
		if (isString(paramData)) {
			if (default_param) {
				if (default_param instanceof TypedNodePathParamValue) {
					return default_param.setPath(paramData);
				}
				if (default_param instanceof TypedParamPathParamValue) {
					return default_param.setPath(paramData);
				}
			}
			return paramData;
		}
		if (isArray(paramData)) {
			(params[paramName] as Vector3).fromArray(paramData as number[]);
		}
	}
}