Halaman utama Jelajahi Bantuan
Daftar Masuk
samien
/
three.js
cermin dari https://github.com/mrdoob/three.js.git
1
0
Fork 0
Berkas Masalah 0 Wiki
Pohon: 7aa546b86b
Ranting Tag
three.js
/
docs
/
pages
/
PerspectiveCamera.html

PerspectiveCamera.html 16 KB
Riwayat Mentahan

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309 
  1. <!DOCTYPE html>
    2. 

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

  3. <head>
    4. 

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

  5. 	<title>PerspectiveCamera - 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>
    8. 

  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. 		<p class="inheritance" translate="no"><a href="EventDispatcher.html">EventDispatcher</a> → <a href="Object3D.html">Object3D</a> → <a href="Camera.html">Camera</a> → </p>
    13. 

  13. 	<h1 translate="no">PerspectiveCamera</h1>
    14. 

  14. 		<section>
    15. 

  15. 			<header>
    16. 

  16. 				<div class="class-description"><p>Camera that uses <a href="https://en.wikipedia.org/wiki/Perspective_(graphical)">perspective projection</a>.</p>
    17. 

  17. <p>This projection mode is designed to mimic the way the human eye sees. It
    18. 

  18. is the most common projection mode used for rendering a 3D scene.</p></div>
    19. 

  19. 				<h2>Code Example</h2>
    20. 

  20. 				<div translate="no"><pre><code class="language-js">const camera = new THREE.PerspectiveCamera( 45, width / height, 1, 1000 );
    21. 

  21. scene.add( camera );
    22. 

  22. </code></pre></div>
    23. 

  23. 			</header>
    24. 

  24. 			<article>
    25. 

  25. 				<div class="container-overview">
    26. 

  26. 					<h2>Constructor</h2>
    27. 

  27. 					<h3 class="name name-method" id="PerspectiveCamera" translate="no">new <a href="#PerspectiveCamera">PerspectiveCamera</a><span class="signature">( fov : <span class="param-type">number</span>, aspect : <span class="param-type">number</span>, near : <span class="param-type">number</span>, far : <span class="param-type">number</span> )</span> </h3>
    28. 

  28. 					<div class="method">
    29. 

  29. 						<div class="description">
    30. 

  30. 							<p>Constructs a new perspective camera.</p>
    31. 

  31. 						</div>
    32. 

  32. 						<table class="params">
    33. 

  33. 							<tbody>
    34. 

  34. 								<tr>
    35. 

  35. 									<td class="name"><code>fov</code></td>
    36. 

  36. 									<td class="description last"><p>The vertical field of view.<br/>Default is <code>50</code>.</p></td>
    37. 

  37. 								</tr>
    38. 

  38. 								<tr>
    39. 

  39. 									<td class="name"><code>aspect</code></td>
    40. 

  40. 									<td class="description last"><p>The aspect ratio.<br/>Default is <code>1</code>.</p></td>
    41. 

  41. 								</tr>
    42. 

  42. 								<tr>
    43. 

  43. 									<td class="name"><code>near</code></td>
    44. 

  44. 									<td class="description last"><p>The camera's near plane.<br/>Default is <code>0.1</code>.</p></td>
    45. 

  45. 								</tr>
    46. 

  46. 								<tr>
    47. 

  47. 									<td class="name"><code>far</code></td>
    48. 

  48. 									<td class="description last"><p>The camera's far plane.<br/>Default is <code>2000</code>.</p></td>
    49. 

  49. 								</tr>
    50. 

  50. 							</tbody>
    51. 

  51. 						</table>
    52. 

  52. 					</div>
    53. 

  53. 				</div>
    54. 

  54. 				<h2 class="subsection-title">Properties</h2>
    55. 

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

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

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

  58. 						<p>The aspect ratio, usually the canvas width / canvas height.<br/>Default is <code>1</code>.</p>
    59. 

  59. 					</div>
    60. 

  60. 				</div>
    61. 

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

  62. 					<h3 class="name" id="far" translate="no">.<a href="#far">far</a><span class="type-signature"> : number</span> </h3>
    63. 

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

  64. 						<p>The camera's far plane. Must be greater than the
    65. 

  65. current value of <a href="PerspectiveCamera.html#near">PerspectiveCamera#near</a>.<br/>Default is <code>2000</code>.</p>
    66. 

  66. 					</div>
    67. 

  67. 				</div>
    68. 

  68. 				<div class="member">
    69. 

  69. 					<h3 class="name" id="filmGauge" translate="no">.<a href="#filmGauge">filmGauge</a><span class="type-signature"> : number</span> </h3>
    70. 

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

  71. 						<p>Film size used for the larger axis. Default is <code>35</code> (millimeters). This
    72. 

  72. parameter does not influence the projection matrix unless <a href="PerspectiveCamera.html#filmOffset">PerspectiveCamera#filmOffset</a>
    73. 

  73. is set to a nonzero value.<br/>Default is <code>35</code>.</p>
    74. 

  74. 					</div>
    75. 

  75. 				</div>
    76. 

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

  77. 					<h3 class="name" id="filmOffset" translate="no">.<a href="#filmOffset">filmOffset</a><span class="type-signature"> : number</span> </h3>
    78. 

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

  79. 						<p>Horizontal off-center offset in the same unit as <a href="PerspectiveCamera.html#filmGauge">PerspectiveCamera#filmGauge</a>.<br/>Default is <code>0</code>.</p>
    80. 

  80. 					</div>
    81. 

  81. 				</div>
    82. 

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

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

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

  85. 						<p>Object distance used for stereoscopy and depth-of-field effects. This
    86. 

  86. parameter does not influence the projection matrix unless a
    87. 

  87. <a href="StereoCamera.html">StereoCamera</a> is being used.<br/>Default is <code>10</code>.</p>
    88. 

  88. 					</div>
    89. 

  89. 				</div>
    90. 

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

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

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

  93. 						<p>The vertical field of view, from bottom to top of view,
    94. 

  94. in degrees.<br/>Default is <code>50</code>.</p>
    95. 

  95. 					</div>
    96. 

  96. 				</div>
    97. 

  97. 				<div class="member">
    98. 

  98. 					<h3 class="name" id="isPerspectiveCamera" translate="no">.<a href="#isPerspectiveCamera">isPerspectiveCamera</a><span class="type-signature"> : boolean</span> <span class="type-signature">(readonly) </span></h3>
    99. 

  99. 					<div class="description">
    100. 

  100. 						<p>This flag can be used for type testing.<br/>Default is <code>true</code>.</p>
    101. 

  101. 					</div>
    102. 

  102. 				</div>
    103. 

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

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

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

  106. 						<p>The camera's near plane. The valid range is greater than <code>0</code>
    107. 

  107. and less than the current value of <a href="PerspectiveCamera.html#far">PerspectiveCamera#far</a>.</p>
    108. 

  108. <p>Note that, unlike for the <a href="OrthographicCamera.html">OrthographicCamera</a>, <code>0</code> is <em>not</em> a
    109. 

  109. valid value for a perspective camera's near plane.<br/>Default is <code>0.1</code>.</p>
    110. 

  110. 					</div>
    111. 

  111. 				</div>
    112. 

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

  113. 					<h3 class="name" id="view" translate="no">.<a href="#view">view</a><span class="type-signature"> : Object</span> </h3>
    114. 

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

  115. 						<p>Represents the frustum window specification. This property should not be edited
    116. 

  116. directly but via <a href="PerspectiveCamera.html#setViewOffset">PerspectiveCamera#setViewOffset</a> and <a href="PerspectiveCamera.html#clearViewOffset">PerspectiveCamera#clearViewOffset</a>.<br/>Default is <code>null</code>.</p>
    117. 

  117. 					</div>
    118. 

  118. 				</div>
    119. 

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

  120. 					<h3 class="name" id="zoom" translate="no">.<a href="#zoom">zoom</a><span class="type-signature"> : number</span> </h3>
    121. 

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

  122. 						<p>The zoom factor of the camera.<br/>Default is <code>1</code>.</p>
    123. 

  123. 					</div>
    124. 

  124. 				</div>
    125. 

  125. 				<h2 class="subsection-title">Methods</h2>
    126. 

  126. 					<h3 class="name name-method" id="clearViewOffset" translate="no">.<a href="#clearViewOffset">clearViewOffset</a><span class="signature">()</span> </h3>
    127. 

  127. 					<div class="method">
    128. 

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

  129. 							<p>Removes the view offset from the projection matrix.</p>
    130. 

  130. 						</div>
    131. 

  131. 					</div>
    132. 

  132. 					<h3 class="name name-method" id="getEffectiveFOV" translate="no">.<a href="#getEffectiveFOV">getEffectiveFOV</a><span class="signature">()</span><span class="type-signature"> : number</span> </h3>
    133. 

  133. 					<div class="method">
    134. 

  134. 						<div class="description">
    135. 

  135. 							<p>Returns the current vertical field of view angle in degrees considering <a href="PerspectiveCamera.html#zoom">PerspectiveCamera#zoom</a>.</p>
    136. 

  136. 						</div>
    137. 

  137. 						<dl class="details">
    138. 

  138. 							<dt class="tag-returns"><strong>Returns:</strong> The effective FOV.</dt>
    139. 

  139. 						</dl>
    140. 

  140. 					</div>
    141. 

  141. 					<h3 class="name name-method" id="getFilmHeight" translate="no">.<a href="#getFilmHeight">getFilmHeight</a><span class="signature">()</span><span class="type-signature"> : number</span> </h3>
    142. 

  142. 					<div class="method">
    143. 

  143. 						<div class="description">
    144. 

  144. 							<p>Returns the height of the image on the film. If <a href="PerspectiveCamera.html#aspect">PerspectiveCamera#aspect</a> is greater than or
    145. 

  145. equal to one (landscape format), the result equals <a href="PerspectiveCamera.html#filmGauge">PerspectiveCamera#filmGauge</a>.</p>
    146. 

  146. 						</div>
    147. 

  147. 						<dl class="details">
    148. 

  148. 							<dt class="tag-returns"><strong>Returns:</strong> The film width.</dt>
    149. 

  149. 						</dl>
    150. 

  150. 					</div>
    151. 

  151. 					<h3 class="name name-method" id="getFilmWidth" translate="no">.<a href="#getFilmWidth">getFilmWidth</a><span class="signature">()</span><span class="type-signature"> : number</span> </h3>
    152. 

  152. 					<div class="method">
    153. 

  153. 						<div class="description">
    154. 

  154. 							<p>Returns the width of the image on the film. If <a href="PerspectiveCamera.html#aspect">PerspectiveCamera#aspect</a> is greater than or
    155. 

  155. equal to one (landscape format), the result equals <a href="PerspectiveCamera.html#filmGauge">PerspectiveCamera#filmGauge</a>.</p>
    156. 

  156. 						</div>
    157. 

  157. 						<dl class="details">
    158. 

  158. 							<dt class="tag-returns"><strong>Returns:</strong> The film width.</dt>
    159. 

  159. 						</dl>
    160. 

  160. 					</div>
    161. 

  161. 					<h3 class="name name-method" id="getFocalLength" translate="no">.<a href="#getFocalLength">getFocalLength</a><span class="signature">()</span><span class="type-signature"> : number</span> </h3>
    162. 

  162. 					<div class="method">
    163. 

  163. 						<div class="description">
    164. 

  164. 							<p>Returns the focal length from the current <a href="PerspectiveCamera.html#fov">PerspectiveCamera#fov</a> and
    165. 

  165. <a href="PerspectiveCamera.html#filmGauge">PerspectiveCamera#filmGauge</a>.</p>
    166. 

  166. 						</div>
    167. 

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

  168. 							<dt class="tag-returns"><strong>Returns:</strong> The computed focal length.</dt>
    169. 

  169. 						</dl>
    170. 

  170. 					</div>
    171. 

  171. 					<h3 class="name name-method" id="getViewBounds" translate="no">.<a href="#getViewBounds">getViewBounds</a><span class="signature">( distance : <span class="param-type">number</span>, minTarget : <span class="param-type">Vector2</span>, maxTarget : <span class="param-type">Vector2</span> )</span> </h3>
    172. 

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

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

  174. 							<p>Computes the 2D bounds of the camera's viewable rectangle at a given distance along the viewing direction.
    175. 

  175. Sets <code>minTarget</code> and <code>maxTarget</code> to the coordinates of the lower-left and upper-right corners of the view rectangle.</p>
    176. 

  176. 						</div>
    177. 

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

  178. 							<tbody>
    179. 

  179. 								<tr>
    180. 

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

  181. 									<td class="description last"><p>The viewing distance.</p></td>
    182. 

  182. 								</tr>
    183. 

  183. 								<tr>
    184. 

  184. 									<td class="name"><code>minTarget</code></td>
    185. 

  185. 									<td class="description last"><p>The lower-left corner of the view rectangle is written into this vector.</p></td>
    186. 

  186. 								</tr>
    187. 

  187. 								<tr>
    188. 

  188. 									<td class="name"><code>maxTarget</code></td>
    189. 

  189. 									<td class="description last"><p>The upper-right corner of the view rectangle is written into this vector.</p></td>
    190. 

  190. 								</tr>
    191. 

  191. 							</tbody>
    192. 

  192. 						</table>
    193. 

  193. 					</div>
    194. 

  194. 					<h3 class="name name-method" id="getViewSize" translate="no">.<a href="#getViewSize">getViewSize</a><span class="signature">( distance : <span class="param-type">number</span>, target : <span class="param-type">Vector2</span> )</span><span class="type-signature"> : <a href="Vector2.html">Vector2</a></span> </h3>
    195. 

  195. 					<div class="method">
    196. 

  196. 						<div class="description">
    197. 

  197. 							<p>Computes the width and height of the camera's viewable rectangle at a given distance along the viewing direction.</p>
    198. 

  198. 						</div>
    199. 

  199. 						<table class="params">
    200. 

  200. 							<tbody>
    201. 

  201. 								<tr>
    202. 

  202. 									<td class="name"><code>distance</code></td>
    203. 

  203. 									<td class="description last"><p>The viewing distance.</p></td>
    204. 

  204. 								</tr>
    205. 

  205. 								<tr>
    206. 

  206. 									<td class="name"><code>target</code></td>
    207. 

  207. 									<td class="description last"><p>The target vector that is used to store result where x is width and y is height.</p></td>
    208. 

  208. 								</tr>
    209. 

  209. 							</tbody>
    210. 

  210. 						</table>
    211. 

  211. 						<dl class="details">
    212. 

  212. 							<dt class="tag-returns"><strong>Returns:</strong> The view size.</dt>
    213. 

  213. 						</dl>
    214. 

  214. 					</div>
    215. 

  215. 					<h3 class="name name-method" id="setFocalLength" translate="no">.<a href="#setFocalLength">setFocalLength</a><span class="signature">( focalLength : <span class="param-type">number</span> )</span> </h3>
    216. 

  216. 					<div class="method">
    217. 

  217. 						<div class="description">
    218. 

  218. 							<p>Sets the FOV by focal length in respect to the current <a href="PerspectiveCamera.html#filmGauge">PerspectiveCamera#filmGauge</a>.</p>
    219. 

  219. <p>The default film gauge is 35, so that the focal length can be specified for
    220. 

  220. a 35mm (full frame) camera.</p>
    221. 

  221. 						</div>
    222. 

  222. 						<table class="params">
    223. 

  223. 							<tbody>
    224. 

  224. 								<tr>
    225. 

  225. 									<td class="name"><code>focalLength</code></td>
    226. 

  226. 									<td class="description last"><p>Values for focal length and film gauge must have the same unit.</p></td>
    227. 

  227. 								</tr>
    228. 

  228. 							</tbody>
    229. 

  229. 						</table>
    230. 

  230. 					</div>
    231. 

  231. 					<h3 class="name name-method" id="setViewOffset" translate="no">.<a href="#setViewOffset">setViewOffset</a><span class="signature">( fullWidth : <span class="param-type">number</span>, fullHeight : <span class="param-type">number</span>, x : <span class="param-type">number</span>, y : <span class="param-type">number</span>, width : <span class="param-type">number</span>, height : <span class="param-type">number</span> )</span> </h3>
    232. 

  232. 					<div class="method">
    233. 

  233. 						<div class="description">
    234. 

  234. 							<p>Sets an offset in a larger frustum. This is useful for multi-window or
    235. 

  235. multi-monitor/multi-machine setups.</p>
    236. 

  236. <p>For example, if you have 3x2 monitors and each monitor is 1920x1080 and
    237. 

  237. the monitors are in grid like this</p>
    238. 

  238. <pre class="prettyprint source"><code>  +---+---+---+
    239. 

  239.   | A | B | C |
    240. 

  240.   +---+---+---+
    241. 

  241.   | D | E | F |
    242. 

  242.   +---+---+---+
    243. 

  243. </code></pre>
    244. 

  244. <p>then for each monitor you would call it like this:</p>
    245. 

  245. <pre><code class="language-js">const w = 1920;
    246. 

  246. const h = 1080;
    247. 

  247. const fullWidth = w * 3;
    248. 

  248. const fullHeight = h * 2;
    249. 

  249. // --A--
    250. 

  250. camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
    251. 

  251. // --B--
    252. 

  252. camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
    253. 

  253. // --C--
    254. 

  254. camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
    255. 

  255. // --D--
    256. 

  256. camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
    257. 

  257. // --E--
    258. 

  258. camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
    259. 

  259. // --F--
    260. 

  260. camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
    261. 

  261. </code></pre>
    262. 

  262. <p>Note there is no reason monitors have to be the same size or in a grid.</p>
    263. 

  263. 						</div>
    264. 

  264. 						<table class="params">
    265. 

  265. 							<tbody>
    266. 

  266. 								<tr>
    267. 

  267. 									<td class="name"><code>fullWidth</code></td>
    268. 

  268. 									<td class="description last"><p>The full width of multiview setup.</p></td>
    269. 

  269. 								</tr>
    270. 

  270. 								<tr>
    271. 

  271. 									<td class="name"><code>fullHeight</code></td>
    272. 

  272. 									<td class="description last"><p>The full height of multiview setup.</p></td>
    273. 

  273. 								</tr>
    274. 

  274. 								<tr>
    275. 

  275. 									<td class="name"><code>x</code></td>
    276. 

  276. 									<td class="description last"><p>The horizontal offset of the subcamera.</p></td>
    277. 

  277. 								</tr>
    278. 

  278. 								<tr>
    279. 

  279. 									<td class="name"><code>y</code></td>
    280. 

  280. 									<td class="description last"><p>The vertical offset of the subcamera.</p></td>
    281. 

  281. 								</tr>
    282. 

  282. 								<tr>
    283. 

  283. 									<td class="name"><code>width</code></td>
    284. 

  284. 									<td class="description last"><p>The width of subcamera.</p></td>
    285. 

  285. 								</tr>
    286. 

  286. 								<tr>
    287. 

  287. 									<td class="name"><code>height</code></td>
    288. 

  288. 									<td class="description last"><p>The height of subcamera.</p></td>
    289. 

  289. 								</tr>
    290. 

  290. 							</tbody>
    291. 

  291. 						</table>
    292. 

  292. 					</div>
    293. 

  293. 					<h3 class="name name-method" id="updateProjectionMatrix" translate="no">.<a href="#updateProjectionMatrix">updateProjectionMatrix</a><span class="signature">()</span> </h3>
    294. 

  294. 					<div class="method">
    295. 

  295. 						<div class="description">
    296. 

  296. 							<p>Updates the camera's projection matrix. Must be called after any change of
    297. 

  297. camera properties.</p>
    298. 

  298. 						</div>
    299. 

  299. 					</div>
    300. 

  300. 				<h2 class="subsection-title">Source</h2>
    301. 

  301. 				<p>
    302. 

  302. 					<a href="https://github.com/mrdoob/three.js/blob/master/src/cameras/PerspectiveCamera.js" target="_blank" rel="noopener" translate="no">src/cameras/PerspectiveCamera.js</a>
    303. 

  303. 				</p>
    304. 

  304. 			</article>
    305. 

  305. 		</section>
    306. 

  306. <script src="../scripts/linenumber.js"></script>
    307. 

  307. <script src="../scripts/page.js"></script>
    308. 

  308. </body>
    309. 

  309. </html>
    310.
粤ICP备19079148号