83 lines
2.4 KiB
C#
83 lines
2.4 KiB
C#
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// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using UnityEngine;
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using UnityEngine.Assertions;
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using System.Collections;
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/// Example page provider that shows how to use Object Pooling to
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/// re-use pages instead of re-allocating them as the player scrolls.
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/// A full description of Object Pooling can be found at https://en.wikipedia.org/wiki/Object_pool_pattern.
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/// Doing this will significantly improve performance by preventing garbage collection and
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/// reducing time spent allocating memory.
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public class PooledPageProvider : MonoBehaviour, IPageProvider {
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[Tooltip("The prefab for each page.")]
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public GameObject pagePrefab;
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/// The spacing between pages in local coordinates.
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[Tooltip("The spacing between pages.")]
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public float spacing = 2000.0f;
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[SerializeField]
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[Tooltip("The number of pages.")]
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[Range(1, 200)]
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private int NumPages = 100;
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private string prefabName;
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private GameObjectPool Pool {
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get {
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ObjectPoolManager poolManager = ObjectPoolManager.Instance;
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Assert.IsNotNull(poolManager);
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GameObjectPool pool = poolManager.GetPool<GameObjectPool>(prefabName);
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if (pool == null) {
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pool = new GameObjectPool(pagePrefab, 2);
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poolManager.AddPool(prefabName, pool);
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}
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return pool;
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}
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}
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void Awake() {
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Assert.IsNotNull(pagePrefab);
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prefabName = pagePrefab.name;
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}
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public float GetSpacing() {
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return spacing;
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}
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public int GetNumberOfPages() {
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return NumPages;
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}
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public RectTransform ProvidePage(int index) {
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GameObject pageTransform = Pool.Borrow();
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RectTransform page = pageTransform.GetComponent<RectTransform>();
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Vector2 middleAnchor = new Vector2(0.5f, 0.5f);
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page.anchorMax = middleAnchor;
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page.anchorMin = middleAnchor;
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return page;
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}
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public void RemovePage(int index, RectTransform page) {
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Pool.Return(page.gameObject);
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}
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}
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