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BufferAttribute.html

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  1. <!DOCTYPE html>
    2. 

  2. <html lang="en">
    3. 

  3. <head>
    4. 

  4. 	<meta charset="utf-8">
    5. 

  5. 	<title>BufferAttribute - Three.js Docs</title>
    6. 

  6. 	<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    7. 

  7. 	<script src="../scripts/highlight.min.js"></script>
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  8. 	<link type="text/css" rel="stylesheet" href="../styles/highlight-three.css">
    9. 

  9. 	<link type="text/css" rel="stylesheet" href="../styles/page.css">
    10. 

  10. </head>
    11. 

  11. <body>
    12. 

  12. 	<h1 translate="no">BufferAttribute</h1>
    13. 

  13. 		<section>
    14. 

  14. 			<header>
    15. 

  15. 				<div class="class-description"><p>This class stores data for an attribute (such as vertex positions, face
    16. 

  16. indices, normals, colors, UVs, and any custom attributes ) associated with
    17. 

  17. a geometry, which allows for more efficient passing of data to the GPU.</p>
    18. 

  18. <p>When working with vector-like data, the <code>fromBufferAttribute( attribute, index )</code>
    19. 

  19. helper methods on vector and color class might be helpful. E.g. <a href="Vector3.html#fromBufferAttribute">Vector3#fromBufferAttribute</a>.</p></div>
    20. 

  20. 			</header>
    21. 

  21. 			<article>
    22. 

  22. 				<div class="container-overview">
    23. 

  23. 					<h2>Constructor</h2>
    24. 

  24. 					<h3 class="name name-method" id="BufferAttribute" translate="no">new <a href="#BufferAttribute">BufferAttribute</a><span class="signature">( array : <span class="param-type">TypedArray</span>, itemSize : <span class="param-type">number</span>, normalized : <span class="param-type">boolean</span> )</span> </h3>
    25. 

  25. 					<div class="method">
    26. 

  26. 						<div class="description">
    27. 

  27. 							<p>Constructs a new buffer attribute.</p>
    28. 

  28. 						</div>
    29. 

  29. 						<table class="params">
    30. 

  30. 							<tbody>
    31. 

  31. 								<tr>
    32. 

  32. 									<td class="name"><code>array</code></td>
    33. 

  33. 									<td class="description last"><p>The array holding the attribute data.</p></td>
    34. 

  34. 								</tr>
    35. 

  35. 								<tr>
    36. 

  36. 									<td class="name"><code>itemSize</code></td>
    37. 

  37. 									<td class="description last"><p>The item size.</p></td>
    38. 

  38. 								</tr>
    39. 

  39. 								<tr>
    40. 

  40. 									<td class="name"><code>normalized</code></td>
    41. 

  41. 									<td class="description last"><p>Whether the data are normalized or not.<br/>Default is <code>false</code>.</p></td>
    42. 

  42. 								</tr>
    43. 

  43. 							</tbody>
    44. 

  44. 						</table>
    45. 

  45. 					</div>
    46. 

  46. 				</div>
    47. 

  47. 				<h2 class="subsection-title">Properties</h2>
    48. 

  48. 				<div class="member">
    49. 

  49. 					<h3 class="name" id="array" translate="no">.<a href="#array">array</a><span class="type-signature"> : TypedArray</span> </h3>
    50. 

  50. 					<div class="description">
    51. 

  51. 						<p>The array holding the attribute data. It should have <code>itemSize * numVertices</code>
    52. 

  52. elements, where <code>numVertices</code> is the number of vertices in the associated geometry.</p>
    53. 

  53. 					</div>
    54. 

  54. 				</div>
    55. 

  55. 				<div class="member">
    56. 

  56. 					<h3 class="name" id="count" translate="no">.<a href="#count">count</a><span class="type-signature"> : number</span> <span class="type-signature">(readonly) </span></h3>
    57. 

  57. 					<div class="description">
    58. 

  58. 						<p>Represents the number of items this buffer attribute stores. It is internally computed
    59. 

  59. by dividing the <code>array</code> length by the <code>itemSize</code>.</p>
    60. 

  60. 					</div>
    61. 

  61. 				</div>
    62. 

  62. 				<div class="member">
    63. 

  63. 					<h3 class="name" id="gpuType" translate="no">.<a href="#gpuType">gpuType</a><span class="type-signature"> : <a href="global.html#FloatType">FloatType</a> | <a href="global.html#IntType">IntType</a></span> </h3>
    64. 

  64. 					<div class="description">
    65. 

  65. 						<p>Configures the bound GPU type for use in shaders.</p>
    66. 

  66. <p>Note: this only has an effect for integer arrays and is not configurable for float arrays.
    67. 

  67. For lower precision float types, use <code>Float16BufferAttribute</code>.<br/>Default is <code>FloatType</code>.</p>
    68. 

  68. 					</div>
    69. 

  69. 				</div>
    70. 

  70. 				<div class="member">
    71. 

  71. 					<h3 class="name" id="id" translate="no">.<a href="#id">id</a><span class="type-signature"> : number</span> <span class="type-signature">(readonly) </span></h3>
    72. 

  72. 					<div class="description">
    73. 

  73. 						<p>The ID of the buffer attribute.</p>
    74. 

  74. 					</div>
    75. 

  75. 				</div>
    76. 

  76. 				<div class="member">
    77. 

  77. 					<h3 class="name" id="isBufferAttribute" translate="no">.<a href="#isBufferAttribute">isBufferAttribute</a><span class="type-signature"> : boolean</span> <span class="type-signature">(readonly) </span></h3>
    78. 

  78. 					<div class="description">
    79. 

  79. 						<p>This flag can be used for type testing.<br/>Default is <code>true</code>.</p>
    80. 

  80. 					</div>
    81. 

  81. 				</div>
    82. 

  82. 				<div class="member">
    83. 

  83. 					<h3 class="name" id="itemSize" translate="no">.<a href="#itemSize">itemSize</a><span class="type-signature"> : number</span> </h3>
    84. 

  84. 					<div class="description">
    85. 

  85. 						<p>The number of values of the array that should be associated with a particular vertex.
    86. 

  86. For instance, if this attribute is storing a 3-component vector (such as a position,
    87. 

  87. normal, or color), then the value should be <code>3</code>.</p>
    88. 

  88. 					</div>
    89. 

  89. 				</div>
    90. 

  90. 				<div class="member">
    91. 

  91. 					<h3 class="name" id="name" translate="no">.<a href="#name">name</a><span class="type-signature"> : string</span> </h3>
    92. 

  92. 					<div class="description">
    93. 

  93. 						<p>The name of the buffer attribute.</p>
    94. 

  94. 					</div>
    95. 

  95. 				</div>
    96. 

  96. 				<div class="member">
    97. 

  97. 					<h3 class="name" id="needsUpdate" translate="no">.<a href="#needsUpdate">needsUpdate</a><span class="type-signature"> : number</span> </h3>
    98. 

  98. 					<div class="description">
    99. 

  99. 						<p>Flag to indicate that this attribute has changed and should be re-sent to
    100. 

  100. the GPU. Set this to <code>true</code> when you modify the value of the array.<br/>Default is <code>false</code>.</p>
    101. 

  101. 					</div>
    102. 

  102. 				</div>
    103. 

  103. 				<div class="member">
    104. 

  104. 					<h3 class="name" id="normalized" translate="no">.<a href="#normalized">normalized</a><span class="type-signature"> : boolean</span> </h3>
    105. 

  105. 					<div class="description">
    106. 

  106. 						<p>Applies to integer data only. Indicates how the underlying data in the buffer maps to
    107. 

  107. the values in the GLSL code. For instance, if <code>array</code> is an instance of <code>UInt16Array</code>,
    108. 

  108. and <code>normalized</code> is <code>true</code>, the values <code>0 - +65535</code> in the array data will be mapped to
    109. 

  109. <code>0.0f - +1.0f</code> in the GLSL attribute. If <code>normalized</code> is <code>false</code>, the values will be converted
    110. 

  110. to floats unmodified, i.e. <code>65535</code> becomes <code>65535.0f</code>.</p>
    111. 

  111. 					</div>
    112. 

  112. 				</div>
    113. 

  113. 				<div class="member">
    114. 

  114. 					<h3 class="name" id="updateRanges" translate="no">.<a href="#updateRanges">updateRanges</a><span class="type-signature"> : Array.&lt;Object></span> </h3>
    115. 

  115. 					<div class="description">
    116. 

  116. 						<p>This can be used to only update some components of stored vectors (for example, just the
    117. 

  117. component related to color). Use the <code>addUpdateRange()</code> function to add ranges to this array.</p>
    118. 

  118. 					</div>
    119. 

  119. 				</div>
    120. 

  120. 				<div class="member">
    121. 

  121. 					<h3 class="name" id="usage" translate="no">.<a href="#usage">usage</a><span class="type-signature"> : <a href="global.html#StaticDrawUsage">StaticDrawUsage</a> | <a href="global.html#DynamicDrawUsage">DynamicDrawUsage</a> | <a href="global.html#StreamDrawUsage">StreamDrawUsage</a> | <a href="global.html#StaticReadUsage">StaticReadUsage</a> | <a href="global.html#DynamicReadUsage">DynamicReadUsage</a> | <a href="global.html#StreamReadUsage">StreamReadUsage</a> | <a href="global.html#StaticCopyUsage">StaticCopyUsage</a> | <a href="global.html#DynamicCopyUsage">DynamicCopyUsage</a> | <a href="global.html#StreamCopyUsage">StreamCopyUsage</a></span> </h3>
    122. 

  122. 					<div class="description">
    123. 

  123. 						<p>Defines the intended usage pattern of the data store for optimization purposes.</p>
    124. 

  124. <p>Note: After the initial use of a buffer, its usage cannot be changed. Instead,
    125. 

  125. instantiate a new one and set the desired usage before the next render.<br/>Default is <code>StaticDrawUsage</code>.</p>
    126. 

  126. 					</div>
    127. 

  127. 				</div>
    128. 

  128. 				<div class="member">
    129. 

  129. 					<h3 class="name" id="version" translate="no">.<a href="#version">version</a><span class="type-signature"> : number</span> </h3>
    130. 

  130. 					<div class="description">
    131. 

  131. 						<p>A version number, incremented every time the <code>needsUpdate</code> is set to <code>true</code>.</p>
    132. 

  132. 					</div>
    133. 

  133. 				</div>
    134. 

  134. 				<h2 class="subsection-title">Methods</h2>
    135. 

  135. 					<h3 class="name name-method" id="addUpdateRange" translate="no">.<a href="#addUpdateRange">addUpdateRange</a><span class="signature">( start : <span class="param-type">number</span>, count : <span class="param-type">number</span> )</span> </h3>
    136. 

  136. 					<div class="method">
    137. 

  137. 						<div class="description">
    138. 

  138. 							<p>Adds a range of data in the data array to be updated on the GPU.</p>
    139. 

  139. 						</div>
    140. 

  140. 						<table class="params">
    141. 

  141. 							<tbody>
    142. 

  142. 								<tr>
    143. 

  143. 									<td class="name"><code>start</code></td>
    144. 

  144. 									<td class="description last"><p>Position at which to start update.</p></td>
    145. 

  145. 								</tr>
    146. 

  146. 								<tr>
    147. 

  147. 									<td class="name"><code>count</code></td>
    148. 

  148. 									<td class="description last"><p>The number of components to update.</p></td>
    149. 

  149. 								</tr>
    150. 

  150. 							</tbody>
    151. 

  151. 						</table>
    152. 

  152. 					</div>
    153. 

  153. 					<h3 class="name name-method" id="applyMatrix3" translate="no">.<a href="#applyMatrix3">applyMatrix3</a><span class="signature">( m : <span class="param-type">Matrix3</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    154. 

  154. 					<div class="method">
    155. 

  155. 						<div class="description">
    156. 

  156. 							<p>Applies the given 3x3 matrix to the given attribute. Works with
    157. 

  157. item size <code>2</code> and <code>3</code>.</p>
    158. 

  158. 						</div>
    159. 

  159. 						<table class="params">
    160. 

  160. 							<tbody>
    161. 

  161. 								<tr>
    162. 

  162. 									<td class="name"><code>m</code></td>
    163. 

  163. 									<td class="description last"><p>The matrix to apply.</p></td>
    164. 

  164. 								</tr>
    165. 

  165. 							</tbody>
    166. 

  166. 						</table>
    167. 

  167. 						<dl class="details">
    168. 

  168. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    169. 

  169. 						</dl>
    170. 

  170. 					</div>
    171. 

  171. 					<h3 class="name name-method" id="applyMatrix4" translate="no">.<a href="#applyMatrix4">applyMatrix4</a><span class="signature">( m : <span class="param-type">Matrix4</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    172. 

  172. 					<div class="method">
    173. 

  173. 						<div class="description">
    174. 

  174. 							<p>Applies the given 4x4 matrix to the given attribute. Only works with
    175. 

  175. item size <code>3</code>.</p>
    176. 

  176. 						</div>
    177. 

  177. 						<table class="params">
    178. 

  178. 							<tbody>
    179. 

  179. 								<tr>
    180. 

  180. 									<td class="name"><code>m</code></td>
    181. 

  181. 									<td class="description last"><p>The matrix to apply.</p></td>
    182. 

  182. 								</tr>
    183. 

  183. 							</tbody>
    184. 

  184. 						</table>
    185. 

  185. 						<dl class="details">
    186. 

  186. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    187. 

  187. 						</dl>
    188. 

  188. 					</div>
    189. 

  189. 					<h3 class="name name-method" id="applyNormalMatrix" translate="no">.<a href="#applyNormalMatrix">applyNormalMatrix</a><span class="signature">( m : <span class="param-type">Matrix3</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    190. 

  190. 					<div class="method">
    191. 

  191. 						<div class="description">
    192. 

  192. 							<p>Applies the given 3x3 normal matrix to the given attribute. Only works with
    193. 

  193. item size <code>3</code>.</p>
    194. 

  194. 						</div>
    195. 

  195. 						<table class="params">
    196. 

  196. 							<tbody>
    197. 

  197. 								<tr>
    198. 

  198. 									<td class="name"><code>m</code></td>
    199. 

  199. 									<td class="description last"><p>The normal matrix to apply.</p></td>
    200. 

  200. 								</tr>
    201. 

  201. 							</tbody>
    202. 

  202. 						</table>
    203. 

  203. 						<dl class="details">
    204. 

  204. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    205. 

  205. 						</dl>
    206. 

  206. 					</div>
    207. 

  207. 					<h3 class="name name-method" id="clearUpdateRanges" translate="no">.<a href="#clearUpdateRanges">clearUpdateRanges</a><span class="signature">()</span> </h3>
    208. 

  208. 					<div class="method">
    209. 

  209. 						<div class="description">
    210. 

  210. 							<p>Clears the update ranges.</p>
    211. 

  211. 						</div>
    212. 

  212. 					</div>
    213. 

  213. 					<h3 class="name name-method" id="clone" translate="no">.<a href="#clone">clone</a><span class="signature">()</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    214. 

  214. 					<div class="method">
    215. 

  215. 						<div class="description">
    216. 

  216. 							<p>Returns a new buffer attribute with copied values from this instance.</p>
    217. 

  217. 						</div>
    218. 

  218. 						<dl class="details">
    219. 

  219. 							<dt class="tag-returns"><strong>Returns:</strong> A clone of this instance.</dt>
    220. 

  220. 						</dl>
    221. 

  221. 					</div>
    222. 

  222. 					<h3 class="name name-method" id="copy" translate="no">.<a href="#copy">copy</a><span class="signature">( source : <span class="param-type">BufferAttribute</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    223. 

  223. 					<div class="method">
    224. 

  224. 						<div class="description">
    225. 

  225. 							<p>Copies the values of the given buffer attribute to this instance.</p>
    226. 

  226. 						</div>
    227. 

  227. 						<table class="params">
    228. 

  228. 							<tbody>
    229. 

  229. 								<tr>
    230. 

  230. 									<td class="name"><code>source</code></td>
    231. 

  231. 									<td class="description last"><p>The buffer attribute to copy.</p></td>
    232. 

  232. 								</tr>
    233. 

  233. 							</tbody>
    234. 

  234. 						</table>
    235. 

  235. 						<dl class="details">
    236. 

  236. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    237. 

  237. 						</dl>
    238. 

  238. 					</div>
    239. 

  239. 					<h3 class="name name-method" id="copyArray" translate="no">.<a href="#copyArray">copyArray</a><span class="signature">( array : <span class="param-type">TypedArray | Array</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    240. 

  240. 					<div class="method">
    241. 

  241. 						<div class="description">
    242. 

  242. 							<p>Copies the given array data into this buffer attribute.</p>
    243. 

  243. 						</div>
    244. 

  244. 						<table class="params">
    245. 

  245. 							<tbody>
    246. 

  246. 								<tr>
    247. 

  247. 									<td class="name"><code>array</code></td>
    248. 

  248. 									<td class="description last"><p>The array to copy.</p></td>
    249. 

  249. 								</tr>
    250. 

  250. 							</tbody>
    251. 

  251. 						</table>
    252. 

  252. 						<dl class="details">
    253. 

  253. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    254. 

  254. 						</dl>
    255. 

  255. 					</div>
    256. 

  256. 					<h3 class="name name-method" id="copyAt" translate="no">.<a href="#copyAt">copyAt</a><span class="signature">( index1 : <span class="param-type">number</span>, attribute : <span class="param-type">BufferAttribute</span>, index2 : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    257. 

  257. 					<div class="method">
    258. 

  258. 						<div class="description">
    259. 

  259. 							<p>Copies a vector from the given buffer attribute to this one. The start
    260. 

  260. and destination position in the attribute buffers are represented by the
    261. 

  261. given indices.</p>
    262. 

  262. 						</div>
    263. 

  263. 						<table class="params">
    264. 

  264. 							<tbody>
    265. 

  265. 								<tr>
    266. 

  266. 									<td class="name"><code>index1</code></td>
    267. 

  267. 									<td class="description last"><p>The destination index into this buffer attribute.</p></td>
    268. 

  268. 								</tr>
    269. 

  269. 								<tr>
    270. 

  270. 									<td class="name"><code>attribute</code></td>
    271. 

  271. 									<td class="description last"><p>The buffer attribute to copy from.</p></td>
    272. 

  272. 								</tr>
    273. 

  273. 								<tr>
    274. 

  274. 									<td class="name"><code>index2</code></td>
    275. 

  275. 									<td class="description last"><p>The source index into the given buffer attribute.</p></td>
    276. 

  276. 								</tr>
    277. 

  277. 							</tbody>
    278. 

  278. 						</table>
    279. 

  279. 						<dl class="details">
    280. 

  280. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    281. 

  281. 						</dl>
    282. 

  282. 					</div>
    283. 

  283. 					<h3 class="name name-method" id="getComponent" translate="no">.<a href="#getComponent">getComponent</a><span class="signature">( index : <span class="param-type">number</span>, component : <span class="param-type">number</span> )</span><span class="type-signature"> : number</span> </h3>
    284. 

  284. 					<div class="method">
    285. 

  285. 						<div class="description">
    286. 

  286. 							<p>Returns the given component of the vector at the given index.</p>
    287. 

  287. 						</div>
    288. 

  288. 						<table class="params">
    289. 

  289. 							<tbody>
    290. 

  290. 								<tr>
    291. 

  291. 									<td class="name"><code>index</code></td>
    292. 

  292. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    293. 

  293. 								</tr>
    294. 

  294. 								<tr>
    295. 

  295. 									<td class="name"><code>component</code></td>
    296. 

  296. 									<td class="description last"><p>The component index.</p></td>
    297. 

  297. 								</tr>
    298. 

  298. 							</tbody>
    299. 

  299. 						</table>
    300. 

  300. 						<dl class="details">
    301. 

  301. 							<dt class="tag-returns"><strong>Returns:</strong> The returned value.</dt>
    302. 

  302. 						</dl>
    303. 

  303. 					</div>
    304. 

  304. 					<h3 class="name name-method" id="getW" translate="no">.<a href="#getW">getW</a><span class="signature">( index : <span class="param-type">number</span> )</span><span class="type-signature"> : number</span> </h3>
    305. 

  305. 					<div class="method">
    306. 

  306. 						<div class="description">
    307. 

  307. 							<p>Returns the w component of the vector at the given index.</p>
    308. 

  308. 						</div>
    309. 

  309. 						<table class="params">
    310. 

  310. 							<tbody>
    311. 

  311. 								<tr>
    312. 

  312. 									<td class="name"><code>index</code></td>
    313. 

  313. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    314. 

  314. 								</tr>
    315. 

  315. 							</tbody>
    316. 

  316. 						</table>
    317. 

  317. 						<dl class="details">
    318. 

  318. 							<dt class="tag-returns"><strong>Returns:</strong> The w component.</dt>
    319. 

  319. 						</dl>
    320. 

  320. 					</div>
    321. 

  321. 					<h3 class="name name-method" id="getX" translate="no">.<a href="#getX">getX</a><span class="signature">( index : <span class="param-type">number</span> )</span><span class="type-signature"> : number</span> </h3>
    322. 

  322. 					<div class="method">
    323. 

  323. 						<div class="description">
    324. 

  324. 							<p>Returns the x component of the vector at the given index.</p>
    325. 

  325. 						</div>
    326. 

  326. 						<table class="params">
    327. 

  327. 							<tbody>
    328. 

  328. 								<tr>
    329. 

  329. 									<td class="name"><code>index</code></td>
    330. 

  330. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    331. 

  331. 								</tr>
    332. 

  332. 							</tbody>
    333. 

  333. 						</table>
    334. 

  334. 						<dl class="details">
    335. 

  335. 							<dt class="tag-returns"><strong>Returns:</strong> The x component.</dt>
    336. 

  336. 						</dl>
    337. 

  337. 					</div>
    338. 

  338. 					<h3 class="name name-method" id="getY" translate="no">.<a href="#getY">getY</a><span class="signature">( index : <span class="param-type">number</span> )</span><span class="type-signature"> : number</span> </h3>
    339. 

  339. 					<div class="method">
    340. 

  340. 						<div class="description">
    341. 

  341. 							<p>Returns the y component of the vector at the given index.</p>
    342. 

  342. 						</div>
    343. 

  343. 						<table class="params">
    344. 

  344. 							<tbody>
    345. 

  345. 								<tr>
    346. 

  346. 									<td class="name"><code>index</code></td>
    347. 

  347. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    348. 

  348. 								</tr>
    349. 

  349. 							</tbody>
    350. 

  350. 						</table>
    351. 

  351. 						<dl class="details">
    352. 

  352. 							<dt class="tag-returns"><strong>Returns:</strong> The y component.</dt>
    353. 

  353. 						</dl>
    354. 

  354. 					</div>
    355. 

  355. 					<h3 class="name name-method" id="getZ" translate="no">.<a href="#getZ">getZ</a><span class="signature">( index : <span class="param-type">number</span> )</span><span class="type-signature"> : number</span> </h3>
    356. 

  356. 					<div class="method">
    357. 

  357. 						<div class="description">
    358. 

  358. 							<p>Returns the z component of the vector at the given index.</p>
    359. 

  359. 						</div>
    360. 

  360. 						<table class="params">
    361. 

  361. 							<tbody>
    362. 

  362. 								<tr>
    363. 

  363. 									<td class="name"><code>index</code></td>
    364. 

  364. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    365. 

  365. 								</tr>
    366. 

  366. 							</tbody>
    367. 

  367. 						</table>
    368. 

  368. 						<dl class="details">
    369. 

  369. 							<dt class="tag-returns"><strong>Returns:</strong> The z component.</dt>
    370. 

  370. 						</dl>
    371. 

  371. 					</div>
    372. 

  372. 					<h3 class="name name-method" id="onUpload" translate="no">.<a href="#onUpload">onUpload</a><span class="signature">( callback : <span class="param-type">function</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    373. 

  373. 					<div class="method">
    374. 

  374. 						<div class="description">
    375. 

  375. 							<p>Sets the given callback function that is executed after the Renderer has transferred
    376. 

  376. the attribute array data to the GPU. Can be used to perform clean-up operations after
    377. 

  377. the upload when attribute data are not needed anymore on the CPU side.</p>
    378. 

  378. 						</div>
    379. 

  379. 						<table class="params">
    380. 

  380. 							<tbody>
    381. 

  381. 								<tr>
    382. 

  382. 									<td class="name"><code>callback</code></td>
    383. 

  383. 									<td class="description last"><p>The <code>onUpload()</code> callback.</p></td>
    384. 

  384. 								</tr>
    385. 

  385. 							</tbody>
    386. 

  386. 						</table>
    387. 

  387. 						<dl class="details">
    388. 

  388. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    389. 

  389. 						</dl>
    390. 

  390. 					</div>
    391. 

  391. 					<h3 class="name name-method" id="onUploadCallback" translate="no">.<a href="#onUploadCallback">onUploadCallback</a><span class="signature">()</span> </h3>
    392. 

  392. 					<div class="method">
    393. 

  393. 						<div class="description">
    394. 

  394. 							<p>A callback function that is executed after the renderer has transferred the attribute
    395. 

  395. array data to the GPU.</p>
    396. 

  396. 						</div>
    397. 

  397. 					</div>
    398. 

  398. 					<h3 class="name name-method" id="set" translate="no">.<a href="#set">set</a><span class="signature">( value : <span class="param-type">TypedArray | Array</span>, offset : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    399. 

  399. 					<div class="method">
    400. 

  400. 						<div class="description">
    401. 

  401. 							<p>Sets the given array data in the buffer attribute.</p>
    402. 

  402. 						</div>
    403. 

  403. 						<table class="params">
    404. 

  404. 							<tbody>
    405. 

  405. 								<tr>
    406. 

  406. 									<td class="name"><code>value</code></td>
    407. 

  407. 									<td class="description last"><p>The array data to set.</p></td>
    408. 

  408. 								</tr>
    409. 

  409. 								<tr>
    410. 

  410. 									<td class="name"><code>offset</code></td>
    411. 

  411. 									<td class="description last"><p>The offset in this buffer attribute's array.<br/>Default is <code>0</code>.</p></td>
    412. 

  412. 								</tr>
    413. 

  413. 							</tbody>
    414. 

  414. 						</table>
    415. 

  415. 						<dl class="details">
    416. 

  416. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    417. 

  417. 						</dl>
    418. 

  418. 					</div>
    419. 

  419. 					<h3 class="name name-method" id="setComponent" translate="no">.<a href="#setComponent">setComponent</a><span class="signature">( index : <span class="param-type">number</span>, component : <span class="param-type">number</span>, value : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    420. 

  420. 					<div class="method">
    421. 

  421. 						<div class="description">
    422. 

  422. 							<p>Sets the given value to the given component of the vector at the given index.</p>
    423. 

  423. 						</div>
    424. 

  424. 						<table class="params">
    425. 

  425. 							<tbody>
    426. 

  426. 								<tr>
    427. 

  427. 									<td class="name"><code>index</code></td>
    428. 

  428. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    429. 

  429. 								</tr>
    430. 

  430. 								<tr>
    431. 

  431. 									<td class="name"><code>component</code></td>
    432. 

  432. 									<td class="description last"><p>The component index.</p></td>
    433. 

  433. 								</tr>
    434. 

  434. 								<tr>
    435. 

  435. 									<td class="name"><code>value</code></td>
    436. 

  436. 									<td class="description last"><p>The value to set.</p></td>
    437. 

  437. 								</tr>
    438. 

  438. 							</tbody>
    439. 

  439. 						</table>
    440. 

  440. 						<dl class="details">
    441. 

  441. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    442. 

  442. 						</dl>
    443. 

  443. 					</div>
    444. 

  444. 					<h3 class="name name-method" id="setUsage" translate="no">.<a href="#setUsage">setUsage</a><span class="signature">( value : <span class="param-type">StaticDrawUsage | DynamicDrawUsage | StreamDrawUsage | StaticReadUsage | DynamicReadUsage | StreamReadUsage | StaticCopyUsage | DynamicCopyUsage | StreamCopyUsage</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    445. 

  445. 					<div class="method">
    446. 

  446. 						<div class="description">
    447. 

  447. 							<p>Sets the usage of this buffer attribute.</p>
    448. 

  448. 						</div>
    449. 

  449. 						<table class="params">
    450. 

  450. 							<tbody>
    451. 

  451. 								<tr>
    452. 

  452. 									<td class="name"><code>value</code></td>
    453. 

  453. 									<td class="description last"><p>The usage to set.</p></td>
    454. 

  454. 								</tr>
    455. 

  455. 							</tbody>
    456. 

  456. 						</table>
    457. 

  457. 						<dl class="details">
    458. 

  458. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this buffer attribute.</dt>
    459. 

  459. 						</dl>
    460. 

  460. 					</div>
    461. 

  461. 					<h3 class="name name-method" id="setW" translate="no">.<a href="#setW">setW</a><span class="signature">( index : <span class="param-type">number</span>, w : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    462. 

  462. 					<div class="method">
    463. 

  463. 						<div class="description">
    464. 

  464. 							<p>Sets the w component of the vector at the given index.</p>
    465. 

  465. 						</div>
    466. 

  466. 						<table class="params">
    467. 

  467. 							<tbody>
    468. 

  468. 								<tr>
    469. 

  469. 									<td class="name"><code>index</code></td>
    470. 

  470. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    471. 

  471. 								</tr>
    472. 

  472. 								<tr>
    473. 

  473. 									<td class="name"><code>w</code></td>
    474. 

  474. 									<td class="description last"><p>The value to set.</p></td>
    475. 

  475. 								</tr>
    476. 

  476. 							</tbody>
    477. 

  477. 						</table>
    478. 

  478. 						<dl class="details">
    479. 

  479. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    480. 

  480. 						</dl>
    481. 

  481. 					</div>
    482. 

  482. 					<h3 class="name name-method" id="setX" translate="no">.<a href="#setX">setX</a><span class="signature">( index : <span class="param-type">number</span>, x : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    483. 

  483. 					<div class="method">
    484. 

  484. 						<div class="description">
    485. 

  485. 							<p>Sets the x component of the vector at the given index.</p>
    486. 

  486. 						</div>
    487. 

  487. 						<table class="params">
    488. 

  488. 							<tbody>
    489. 

  489. 								<tr>
    490. 

  490. 									<td class="name"><code>index</code></td>
    491. 

  491. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    492. 

  492. 								</tr>
    493. 

  493. 								<tr>
    494. 

  494. 									<td class="name"><code>x</code></td>
    495. 

  495. 									<td class="description last"><p>The value to set.</p></td>
    496. 

  496. 								</tr>
    497. 

  497. 							</tbody>
    498. 

  498. 						</table>
    499. 

  499. 						<dl class="details">
    500. 

  500. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    501. 

  501. 						</dl>
    502. 

  502. 					</div>
    503. 

  503. 					<h3 class="name name-method" id="setXY" translate="no">.<a href="#setXY">setXY</a><span class="signature">( index : <span class="param-type">number</span>, x : <span class="param-type">number</span>, y : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    504. 

  504. 					<div class="method">
    505. 

  505. 						<div class="description">
    506. 

  506. 							<p>Sets the x and y component of the vector at the given index.</p>
    507. 

  507. 						</div>
    508. 

  508. 						<table class="params">
    509. 

  509. 							<tbody>
    510. 

  510. 								<tr>
    511. 

  511. 									<td class="name"><code>index</code></td>
    512. 

  512. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    513. 

  513. 								</tr>
    514. 

  514. 								<tr>
    515. 

  515. 									<td class="name"><code>x</code></td>
    516. 

  516. 									<td class="description last"><p>The value for the x component to set.</p></td>
    517. 

  517. 								</tr>
    518. 

  518. 								<tr>
    519. 

  519. 									<td class="name"><code>y</code></td>
    520. 

  520. 									<td class="description last"><p>The value for the y component to set.</p></td>
    521. 

  521. 								</tr>
    522. 

  522. 							</tbody>
    523. 

  523. 						</table>
    524. 

  524. 						<dl class="details">
    525. 

  525. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    526. 

  526. 						</dl>
    527. 

  527. 					</div>
    528. 

  528. 					<h3 class="name name-method" id="setXYZ" translate="no">.<a href="#setXYZ">setXYZ</a><span class="signature">( index : <span class="param-type">number</span>, x : <span class="param-type">number</span>, y : <span class="param-type">number</span>, z : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    529. 

  529. 					<div class="method">
    530. 

  530. 						<div class="description">
    531. 

  531. 							<p>Sets the x, y and z component of the vector at the given index.</p>
    532. 

  532. 						</div>
    533. 

  533. 						<table class="params">
    534. 

  534. 							<tbody>
    535. 

  535. 								<tr>
    536. 

  536. 									<td class="name"><code>index</code></td>
    537. 

  537. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    538. 

  538. 								</tr>
    539. 

  539. 								<tr>
    540. 

  540. 									<td class="name"><code>x</code></td>
    541. 

  541. 									<td class="description last"><p>The value for the x component to set.</p></td>
    542. 

  542. 								</tr>
    543. 

  543. 								<tr>
    544. 

  544. 									<td class="name"><code>y</code></td>
    545. 

  545. 									<td class="description last"><p>The value for the y component to set.</p></td>
    546. 

  546. 								</tr>
    547. 

  547. 								<tr>
    548. 

  548. 									<td class="name"><code>z</code></td>
    549. 

  549. 									<td class="description last"><p>The value for the z component to set.</p></td>
    550. 

  550. 								</tr>
    551. 

  551. 							</tbody>
    552. 

  552. 						</table>
    553. 

  553. 						<dl class="details">
    554. 

  554. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    555. 

  555. 						</dl>
    556. 

  556. 					</div>
    557. 

  557. 					<h3 class="name name-method" id="setXYZW" translate="no">.<a href="#setXYZW">setXYZW</a><span class="signature">( index : <span class="param-type">number</span>, x : <span class="param-type">number</span>, y : <span class="param-type">number</span>, z : <span class="param-type">number</span>, w : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    558. 

  558. 					<div class="method">
    559. 

  559. 						<div class="description">
    560. 

  560. 							<p>Sets the x, y, z and w component of the vector at the given index.</p>
    561. 

  561. 						</div>
    562. 

  562. 						<table class="params">
    563. 

  563. 							<tbody>
    564. 

  564. 								<tr>
    565. 

  565. 									<td class="name"><code>index</code></td>
    566. 

  566. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    567. 

  567. 								</tr>
    568. 

  568. 								<tr>
    569. 

  569. 									<td class="name"><code>x</code></td>
    570. 

  570. 									<td class="description last"><p>The value for the x component to set.</p></td>
    571. 

  571. 								</tr>
    572. 

  572. 								<tr>
    573. 

  573. 									<td class="name"><code>y</code></td>
    574. 

  574. 									<td class="description last"><p>The value for the y component to set.</p></td>
    575. 

  575. 								</tr>
    576. 

  576. 								<tr>
    577. 

  577. 									<td class="name"><code>z</code></td>
    578. 

  578. 									<td class="description last"><p>The value for the z component to set.</p></td>
    579. 

  579. 								</tr>
    580. 

  580. 								<tr>
    581. 

  581. 									<td class="name"><code>w</code></td>
    582. 

  582. 									<td class="description last"><p>The value for the w component to set.</p></td>
    583. 

  583. 								</tr>
    584. 

  584. 							</tbody>
    585. 

  585. 						</table>
    586. 

  586. 						<dl class="details">
    587. 

  587. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    588. 

  588. 						</dl>
    589. 

  589. 					</div>
    590. 

  590. 					<h3 class="name name-method" id="setY" translate="no">.<a href="#setY">setY</a><span class="signature">( index : <span class="param-type">number</span>, y : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    591. 

  591. 					<div class="method">
    592. 

  592. 						<div class="description">
    593. 

  593. 							<p>Sets the y component of the vector at the given index.</p>
    594. 

  594. 						</div>
    595. 

  595. 						<table class="params">
    596. 

  596. 							<tbody>
    597. 

  597. 								<tr>
    598. 

  598. 									<td class="name"><code>index</code></td>
    599. 

  599. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    600. 

  600. 								</tr>
    601. 

  601. 								<tr>
    602. 

  602. 									<td class="name"><code>y</code></td>
    603. 

  603. 									<td class="description last"><p>The value to set.</p></td>
    604. 

  604. 								</tr>
    605. 

  605. 							</tbody>
    606. 

  606. 						</table>
    607. 

  607. 						<dl class="details">
    608. 

  608. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    609. 

  609. 						</dl>
    610. 

  610. 					</div>
    611. 

  611. 					<h3 class="name name-method" id="setZ" translate="no">.<a href="#setZ">setZ</a><span class="signature">( index : <span class="param-type">number</span>, z : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    612. 

  612. 					<div class="method">
    613. 

  613. 						<div class="description">
    614. 

  614. 							<p>Sets the z component of the vector at the given index.</p>
    615. 

  615. 						</div>
    616. 

  616. 						<table class="params">
    617. 

  617. 							<tbody>
    618. 

  618. 								<tr>
    619. 

  619. 									<td class="name"><code>index</code></td>
    620. 

  620. 									<td class="description last"><p>The index into the buffer attribute.</p></td>
    621. 

  621. 								</tr>
    622. 

  622. 								<tr>
    623. 

  623. 									<td class="name"><code>z</code></td>
    624. 

  624. 									<td class="description last"><p>The value to set.</p></td>
    625. 

  625. 								</tr>
    626. 

  626. 							</tbody>
    627. 

  627. 						</table>
    628. 

  628. 						<dl class="details">
    629. 

  629. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    630. 

  630. 						</dl>
    631. 

  631. 					</div>
    632. 

  632. 					<h3 class="name name-method" id="toJSON" translate="no">.<a href="#toJSON">toJSON</a><span class="signature">()</span><span class="type-signature"> : Object</span> </h3>
    633. 

  633. 					<div class="method">
    634. 

  634. 						<div class="description">
    635. 

  635. 							<p>Serializes the buffer attribute into JSON.</p>
    636. 

  636. 						</div>
    637. 

  637. 						<dl class="details">
    638. 

  638. 							<dt class="tag-returns"><strong>Returns:</strong> A JSON object representing the serialized buffer attribute.</dt>
    639. 

  639. 						</dl>
    640. 

  640. 					</div>
    641. 

  641. 					<h3 class="name name-method" id="transformDirection" translate="no">.<a href="#transformDirection">transformDirection</a><span class="signature">( m : <span class="param-type">Matrix4</span> )</span><span class="type-signature"> : <a href="BufferAttribute.html">BufferAttribute</a></span> </h3>
    642. 

  642. 					<div class="method">
    643. 

  643. 						<div class="description">
    644. 

  644. 							<p>Applies the given 4x4 matrix to the given attribute. Only works with
    645. 

  645. item size <code>3</code> and with direction vectors.</p>
    646. 

  646. 						</div>
    647. 

  647. 						<table class="params">
    648. 

  648. 							<tbody>
    649. 

  649. 								<tr>
    650. 

  650. 									<td class="name"><code>m</code></td>
    651. 

  651. 									<td class="description last"><p>The matrix to apply.</p></td>
    652. 

  652. 								</tr>
    653. 

  653. 							</tbody>
    654. 

  654. 						</table>
    655. 

  655. 						<dl class="details">
    656. 

  656. 							<dt class="tag-returns"><strong>Returns:</strong> A reference to this instance.</dt>
    657. 

  657. 						</dl>
    658. 

  658. 					</div>
    659. 

  659. 				<h2 class="subsection-title">Source</h2>
    660. 

  660. 				<p>
    661. 

  661. 					<a href="https://github.com/mrdoob/three.js/blob/master/src/core/BufferAttribute.js" target="_blank" rel="noopener" translate="no">src/core/BufferAttribute.js</a>
    662. 

  662. 				</p>
    663. 

  663. 			</article>
    664. 

  664. 		</section>
    665. 

  665. <script src="../scripts/linenumber.js"></script>
    666. 

  666. <script src="../scripts/page.js"></script>
    667. 

  667. </body>
    668. 

  668. </html>
    669.
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