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Abstraction for group of pedestrians capable of influence each other emotionally.

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/*
 * Copyright (C) 2010-2023, Danilo Pianini and contributors
 * listed, for each module, in the respective subproject's build.gradle.kts file.
 *
 * This file is part of Alchemist, and is distributed under the terms of the
 * GNU General Public License, with a linking exception,
 * as described in the file LICENSE in the Alchemist distribution's top directory.
 */

package it.unibo.alchemist.model.cognitive.steering

import it.unibo.alchemist.model.Node
import it.unibo.alchemist.model.Node.Companion.asProperty
import it.unibo.alchemist.model.cognitive.PhysicalSteeringStrategy
import it.unibo.alchemist.model.cognitive.SteeringStrategy
import it.unibo.alchemist.model.geometry.Euclidean2DShapeFactory
import it.unibo.alchemist.model.geometry.Euclidean2DTransformation
import it.unibo.alchemist.model.physics.environments.Physics2DEnvironment
import it.unibo.alchemist.model.physics.properties.PhysicalPedestrian2D
import it.unibo.alchemist.model.positions.Euclidean2DPosition

/**
 * A [PhysicalSteeringStrategy] performing a simple sum of the overall intentional force and the physical ones.
 */
class Sum(
    private val environment: Physics2DEnvironment,
    override val node: Node,
    override val nonPhysicalStrategy: SteeringStrategy,
) : PhysicalSteeringStrategy {

    private val nodePhysics = node.asProperty>()

    override fun computeNextPosition(overallIntentionalForce: Euclidean2DPosition): Euclidean2DPosition =
        (nodePhysics.physicalForces(environment) + overallIntentionalForce)
            .reduce { acc, p -> acc + p }
}