Function processExplosiveChain

app/lib/level-generation.js:1432–1478

({ zapTargetPosSrc, zapTargetPosNew, thangsSrc, thangsNew, processedPositions, visitedPositions, actionSrc, actionNew })

}

function processExplosiveChain ({ zapTargetPosSrc, zapTargetPosNew, thangsSrc, thangsNew, processedPositions, visitedPositions, actionSrc, actionNew }) {
  const directions = [
    new Direction('up'),
    new Direction('right'),
    new Direction('down'),
    new Direction('left'),
    { name: 'upleft', vector: new Vector(-1, 1) },
    { name: 'upright', vector: new Vector(1, 1) },
    { name: 'downleft', vector: new Vector(-1, -1) },
    { name: 'downright', vector: new Vector(1, -1) }
  ]

  for (const direction of directions) {
    const nearbyPosSrc = zapTargetPosSrc.copy().add(direction.vector)
    const posKey = `${nearbyPosSrc.x},${nearbyPosSrc.y}`

    if (processedPositions.has(posKey)) continue
    processedPositions.add(posKey)

    const nearbyThangSrc = findThangAt(nearbyPosSrc, thangsSrc)
    const nearbySpriteName = thangTypesToSpriteNames[nearbyThangSrc?.thangType]

    if (nearbyThangSrc && hittableSpriteNames.includes(nearbySpriteName)) {
      const zapDirectionRelationship = actionNew.direction.getRelationship(actionSrc.direction)
      const directionNew = new Vector(direction.vector.x, direction.vector.y)

      if (zapDirectionRelationship === 'backward') {
        directionNew.multiply(-1)
      } else if (zapDirectionRelationship === 'turn') {
        const rotationFactor = actionNew.direction.vector.x * actionSrc.direction.vector.y - actionNew.direction.vector.y * actionSrc.direction.vector.x > 0 ? 1 : -1
        directionNew.rotate(Math.PI / 2 * rotationFactor)
      }

      const nearbyPosNew = zapTargetPosNew.copy().add(directionNew)
      visitedPositions.push(nearbyPosNew.copy())

      if (!moveThang({ at: nearbyPosSrc, to: nearbyPosNew, thangsSrc, thangsNew })) {
        actionNew.invalid = true
      }

      if (nearbySpriteName === 'Explosive Junior') {
        // console.log('Processing explosive chain', nearbyThangSrc, posKey)
        processExplosiveChain({ zapTargetPosSrc: nearbyPosSrc, zapTargetPosNew: nearbyPosNew, thangsSrc, thangsNew, processedPositions, visitedPositions, actionSrc, actionNew })
      }
    }
  }
}

function repositionFriendsAndExplosives ({ thangsSrc, thangsNew, visitedPositions }) {
  // Find any TNT or chickens that weren't moved into position (x == y == placeholderPosition), and try to put them where they might go