2020-02-11 19:35:35 +01:00
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/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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*
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*/
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package de.bluecolored.bluemap.core.threejs;
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2021-05-16 18:13:30 +02:00
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import de.bluecolored.bluemap.core.util.Preconditions;
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2020-02-11 19:35:35 +01:00
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Represents a ThreeJS BufferAttribute
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*/
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public class BufferAttribute {
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private int itemSize;
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private boolean normalized;
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private float[] values;
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/**
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* Creates a new {@link BufferAttribute} with the defined item-size
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*/
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public BufferAttribute(float[] values, int itemSize) {
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Preconditions.checkArgument(values.length % itemSize == 0, "The length of the values-array is not a multiple of the item-size!");
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this.values = values;
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this.itemSize = itemSize;
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this.normalized = false;
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}
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/**
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* Creates a new {@link BufferAttribute} with the defined item-size and the
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* defined threejs "normalized" attribute
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*/
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public BufferAttribute(float[] values, int itemSize, boolean normalized) {
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Preconditions.checkArgument(values.length % itemSize == 0, "The length of the values-array is not a multiple of the item-size!");
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this.values = values;
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this.itemSize = itemSize;
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this.normalized = normalized;
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}
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public void writeJson(JsonWriter json) throws IOException {
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json.beginObject();
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json.name("type").value("Float32Array");
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json.name("itemSize").value(itemSize);
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json.name("normalized").value(normalized);
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json.name("array").beginArray();
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for (int i = 0; i < values.length; i++) {
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// rounding and remove ".0" to save string space
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2020-03-17 20:23:59 +01:00
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double d = Math.round(values[i] * 10000d) / 10000d;
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if (d == (long) d) json.value((long) d);
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2020-02-11 19:35:35 +01:00
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else json.value(d);
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}
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json.endArray();
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json.endObject();
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}
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public int getItemSize() {
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return this.itemSize;
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}
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public boolean isNormalized() {
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return this.normalized;
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}
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public int getValueCount() {
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return this.values.length;
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}
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public int getItemCount() {
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return Math.floorDiv(getValueCount(), getItemSize());
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}
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public float[] values() {
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return values;
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}
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public static BufferAttribute readJson(JsonReader json) throws IOException {
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List<Float> list = new ArrayList<>(1000);
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int itemSize = 1;
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boolean normalized = false;
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json.beginObject(); //root
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while (json.hasNext()){
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String name = json.nextName();
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if(name.equals("array")){
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json.beginArray(); //array
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while (json.hasNext()){
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2021-06-08 22:44:55 +02:00
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list.add((float) json.nextDouble());
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2020-02-11 19:35:35 +01:00
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}
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json.endArray(); //array
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}
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else if (name.equals("itemSize")) {
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itemSize = json.nextInt();
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}
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else if (name.equals("normalized")) {
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normalized = json.nextBoolean();
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}
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else json.skipValue();
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}
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json.endObject(); //root
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//collect values in array
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float[] values = new float[list.size()];
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for (int i = 0; i < values.length; i++) {
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values[i] = list.get(i);
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}
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return new BufferAttribute(values, itemSize, normalized);
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}
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}
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