@polygonjs/polygonjs/src/engine/nodes/sop/Instance.ts

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

/**
 * Copies a geometry onto every point from the right input.
 *
 * @remarks
 * Creates an instance geometry, by instancing the geometry in the left input onto every point from the right input. This is a great way to display a lot of geometries on screen with little performance penalty.
 *
 *
 */

import {TypedSopNode} from './_Base';
import {CoreGroup} from '../../../core/geometry/Group';
import {NodeContext} from '../../poly/NodeContext';
import {InstanceSopOperation} from '../../operations/sop/Instance';
import {NodeParamsConfig, ParamConfig} from '../utils/params/ParamsConfig';
import {SopType} from '../../poly/registers/nodes/types/Sop';
const DEFAULT = InstanceSopOperation.DEFAULT_PARAMS;
class InstanceSopParamsConfig extends NodeParamsConfig {
	/** @param attributes to copy to the instance */
	attributesToCopy = ParamConfig.STRING(DEFAULT.attributesToCopy);
	/** @param toggles on to apply a material. This is useful in most cases, but there may be situations where the material would be apply later, such as when you are feeding this node to a particles system */
	applyMaterial = ParamConfig.BOOLEAN(DEFAULT.applyMaterial);
	/** @param material to apply */
	material = ParamConfig.NODE_PATH('', {
		visibleIf: {applyMaterial: 1},
		nodeSelection: {
			context: NodeContext.MAT,
		},
		dependentOnFoundNode: false,
	});
}
const ParamsConfig = new InstanceSopParamsConfig();

export class InstanceSopNode extends TypedSopNode<InstanceSopParamsConfig> {
	override paramsConfig = ParamsConfig;
	static override type() {
		return SopType.INSTANCE;
	}

	override initializeNode() {
		super.initializeNode();
		this.io.inputs.setCount(2);
		this.io.inputs.initInputsClonedState(InstanceSopOperation.INPUT_CLONED_STATE);
	}

	private _operation: InstanceSopOperation | undefined;
	override async cook(inputCoreGroups: CoreGroup[]) {
		this._operation = this._operation || new InstanceSopOperation(this.scene(), this.states, this);
		const coreGroup = await this._operation.cook(inputCoreGroups, this.pv);
		this.setCoreGroup(coreGroup);
	}
}