多视角3D可旋转的HTML5 Logo动画_html5教程技巧

这是一款基于HTML5和CSS3的3D动画特效，与之前的3D特效不同的是，这款是完全用HTML5特性实现的，而并非用多张图片叠加起来。这款3D动画还有一个特点是可以无限的旋转，从而可以从多个视角来观察HTML5 Logo。

在线演示 源码下载

HTML代码

XML/HTML Code复制内容到剪贴板

1. div class="link-overlay">
3. div>
4. canvas id="canvas" style="background-color:#ddd">canvas>

JavaScript代码

JavaScript Code复制内容到剪贴板

1. // bind to window onload handler
2. window.addEventListener('load', onloadHandler, false);
4. /**
5. * Window onload handler
6. */
7. function onloadHandler()
8. {
9. var canvas = document.getElementById('canvas');
10. canvas.width = window.innerWidth;
11. canvas.height = window.innerHeight;
12. var k3dmain = new K3D.Controller(canvas, true);
14. // generate 3D objects
16. var obj1 = new K3D.K3DObject();
17. with (obj1)
18. {
19. drawmode = "solid";
20. shademode = "lightsource";
21. sortmode = "unsorted";
22. addphi = -0.5;
23. abouty = -90;
24. perslevel = 1000;
25. init(
26. [{x:-80,y:180,z:0},{x:0,y:180,z:-80},{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:-50,y:150,z:-30},{x:0,y:150,z:-80},{x:0,y:130,z:-80},{x:-30,y:130,z:-50},{x:-28,y:110,z:-52},{x:0,y:110,z:-80},{x:0,y:90,z:-80},{x:-45,y:90,z:-35},{x:-44,y:80,z:-36},{x:-25,y:80,z:-55},{x:-22,y:66,z:-58},{x:0,y:60,z:-80},{x:0,y:40,z:-80},{x:-40,y:50,z:-40}],
27. [],
28. [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
29. );
30. }
31. k3dmain.addK3DObject(obj1);
33. var obj2 = new K3D.K3DObject();
34. with (obj2)
35. {
36. drawmode = "solid";
37. shademode = "lightsource";
38. sortmode = "unsorted";
39. addphi = -0.5;
40. abouty = -90;
41. perslevel = 1000;
42. init(
43. [{x:0,y:180,z:-80},{x:80,y:180,z:0},{x:80,y:20,z:0},{x:0,y:0,z:-80},{x:0,y:165,z:-80},{x:68,y:165,z:-12},{x:55,y:35,z:-25},{x:0,y:20,z:-80},{x:0,y:150,z:-80},{x:50,y:150,z:-30},{x:47,y:130,z:-33},{x:0,y:130,z:-80},{x:0,y:110,z:-80},{x:45,y:110,z:-35},{x:40,y:50,z:-40},{x:0,y:40,z:-80},{x:0,y:60,z:-80},{x:20,y:66,z:-60},{x:23,y:90,z:-57},{x:0,y:90,z:-80}],
44. [],
45. [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
46. );
47. }
48. k3dmain.addK3DObject(obj2);
50. var obj3 = new K3D.K3DObject();
51. with (obj3)
52. {
53. drawmode = "solid";
54. shademode = "lightsource";
55. sortmode = "unsorted";
56. addphi = -0.5;
57. abouty = -90;
58. perslevel = 1000;
59. init(
60. [{x:80,y:180,z:0},{x:0,y:180,z:80},{x:0,y:0,z:80},{x:80,y:20,z:0},{x:50,y:150,z:30},{x:0,y:150,z:80},{x:0,y:130,z:80},{x:30,y:130,z:50},{x:28,y:110,z:52},{x:0,y:110,z:80},{x:0,y:90,z:80},{x:45,y:90,z:35},{x:44,y:80,z:36},{x:25,y:80,z:55},{x:22,y:66,z:58},{x:0,y:60,z:80},{x:0,y:40,z:80},{x:40,y:50,z:40}],
61. [],
62. [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
63. );
64. }
65. k3dmain.addK3DObject(obj3);
67. var obj4 = new K3D.K3DObject();
68. with (obj4)
69. {
70. drawmode = "solid";
71. shademode = "lightsource";
72. sortmode = "unsorted";
73. addphi = -0.5;
74. abouty = -90;
75. perslevel = 1000;
76. init(
77. [{x:0,y:180,z:80},{x:-80,y:180,z:0},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:0,y:165,z:80},{x:-68,y:165,z:12},{x:-55,y:35,z:25},{x:0,y:20,z:80},{x:0,y:150,z:80},{x:-50,y:150,z:30},{x:-47,y:130,z:33},{x:0,y:130,z:80},{x:0,y:110,z:80},{x:-45,y:110,z:35},{x:-40,y:50,z:40},{x:0,y:40,z:80},{x:0,y:60,z:80},{x:-20,y:66,z:60},{x:-23,y:90,z:57},{x:0,y:90,z:80}],
78. [],
79. [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
80. );
81. }
82. k3dmain.addK3DObject(obj4);
84. var objBase = new K3D.K3DObject();
85. with (objBase)
86. {
87. drawmode = "solid";
88. shademode = "lightsource";
89. sortmode = "unsorted";
90. addphi = -0.5;
91. abouty = -90;
92. perslevel = 1000;
93. init(
94. [{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:80,y:20,z:0}],
95. [],
96. [{color:[227,76,38],vertices:[0,2,1,0]},{color:[227,76,38],vertices:[0,3,2,0]}]
97. );
98. }
99. k3dmain.addK3DObject(objBase);
101. var objHtml = new K3D.K3DObject();
102. with (objHtml)
103. {
104. drawmode = "solid";
105. shademode = "lightsource";
106. //sortmode = "unsorted";
107. color = [64,64,64];
108. doublesided = true;
109. addphi = -0.5;
110. abouty = 100;
111. scale = 0.75;
112. perslevel = 1000;
113. init(
114. [{x:-80,y:40,z:0},{x:-70,y:40,z:0},{x:-70,y:30,z:0},{x:-60,y:30,z:0},{x:-60,y:40,z:0},{x:-50,y:40,z:0},{x:-50,y:10,z:0},{x:-60,y:10,z:0},{x:-60,y:20,z:0},{x:-70,y:20,z:0},{x:-70,y:10,z:0},{x:-80,y:10,z:0},{x:-40,y:40,z:0},{x:-10,y:40,z:0},{x:-10,y:30,z:0},{x:-20,y:30,z:0},{x:-20,y:10,z:0},{x:-30,y:10,z:0},{x:-30,y:30,z:0},{x:-40,y:30,z:0},{x:0,y:40,z:0},{x:10,y:40,z:0},{x:20,y:30,z:0},{x:30,y:40,z:0},{x:40,y:40,z:0},{x:40,y:10,z:0},{x:30,y:10,z:0},{x:30,y:30,z:0},{x:20,y:20,z:0},{x:10,y:30,z:0},{x:10,y:10,z:0},{x:0,y:10,z:0},{x:50,y:40,z:0},{x:60,y:40,z:0},{x:60,y:20,z:0},{x:80,y:20,z:0},{x:80,y:10,z:0},{x:50,y:10,z:0}],
115. [],
116. [{vertices:[0,1,2,3,4,5,6,7,8,9,10,11,0]},{vertices:[12,13,14,15,16,17,18,19,12]},{vertices:[20,21,22,23,24,25,26,27,28,29,30,31,20]},{vertices:[32,33,34,35,36,37,32]}]
117. );
118. }
119. k3dmain.addK3DObject(objHtml);
121. // add render loop callback
122. var ctx = canvas.getContext('2d');
123. var rotationOffset = 0;
124. var len = (canvas.height > canvas.width ? canvas.height : canvas.width) * 0.7;
125. k3dmain.clearBackground = false;
126. k3dmain.callback = function()
127. {
128. // manually clear bg - as we want to render some extra goodies
129. ctx.clearRect(0, 0, canvas.width, canvas.height);
131. // draw bg effect before K3D does its 3D rendering
132. ctx.save();
133. ctx.translate(canvas.width/2, canvas.height/2);
134. ctx.rotate(rotationOffset);
136. // first fill pass - outer rays
137. var RAYCOUNT = 24;
138. ctx.fillStyle = "#eee";
139. ctx.beginPath();
140. for (var i=0; i
141. {
142. // rotate context
143. ctx.rotate(TWOPI / RAYCOUNT);
144. ctx.moveTo(0, 0);
145. ctx.lineTo(-20, len);
146. ctx.lineTo(20, len);
147. }
148. ctx.closePath();
149. ctx.fill();
150. // second fill pass - inner rays
151. ctx.fillStyle = "#fff";
152. ctx.beginPath();
153. for (var i=0; i
154. {
155. // rotate context
156. ctx.rotate(TWOPI / RAYCOUNT);
157. ctx.moveTo(0, 0);
158. ctx.lineTo(-15, len);
159. ctx.lineTo(15, len);
160. }
161. ctx.closePath();
162. ctx.fill();
163. ctx.restore();
164. rotationOffset += 0.005;
166. // apply user interaction to rotation
167. for (var i=0, objs=k3dmain.objects; i
168. {
169. objs[i].ophi += targetRotationX;
170. }
172. if (targetRotationX > -0.5) targetRotationX -= 0.05;
173. else if (targetRotationX
174. if (targetRotationX > -0.55 && targetRotationX
175. };
177. // start demo loop
178. k3dmain.paused = true;
179. setInterval(function(){k3dmain.tick()}, 1000/60);
180. }
182. // nifty drag/touch event capture code borrowed from Mr Doob http://mrdoob.com/
183. var targetRotationX = 0;
184. var targetRotationOnMouseDownX = 0;
185. var mouseX = 0;
186. var mouseXOnMouseDown = 0;
187. var targetRotationY = 0;
188. var targetRotationOnMouseDownY = 0;
189. var mouseY = 0;
190. var mouseYOnMouseDown = 0;
192. var windowHalfX = window.innerWidth / 2;
193. var windowHalfY = window.innerHeight / 2;
195. document.addEventListener('mousedown', onDocumentMouseDown, false);
196. document.addEventListener('touchstart', onDocumentTouchStart, false);
197. document.addEventListener('touchmove', onDocumentTouchMove, false);
199. function onDocumentMouseDown( event ) {
201. event.preventDefault();
203. document.addEventListener('mousemove', onDocumentMouseMove, false);
204. document.addEventListener('mouseup', onDocumentMouseUp, false);
205. document.addEventListener('mouseout', onDocumentMouseOut, false);
207. mouseXOnMouseDown = event.clientX - windowHalfX;
208. targetRotationOnMouseDownX = targetRotationX;
209. mouseYOnMouseDown = event.clientY - windowHalfY;
210. targetRotationOnMouseDownY = targetRotationY;
211. }
213. function onDocumentMouseMove( event )
214. {
215. mouseX = event.clientX - windowHalfX;
216. targetRotationX = targetRotationOnMouseDownX + (mouseX - mouseXOnMouseDown) * 0.02;
217. mouseY = event.clientY - windowHalfY;
218. targetRotationY = targetRotationOnMouseDownY + (mouseY - mouseYOnMouseDown) * 0.02;
219. }
221. function onDocumentMouseUp( event )
222. {
223. document.removeEventListener('mousemove', onDocumentMouseMove, false);
224. document.removeEventListener('mouseup', onDocumentMouseUp, false);
225. document.removeEventListener('mouseout', onDocumentMouseOut, false);
226. }
228. function onDocumentMouseOut( event )
229. {
230. document.removeEventListener('mousemove', onDocumentMouseMove, false);
231. document.removeEventListener('mouseup', onDocumentMouseUp, false);
232. document.removeEventListener('mouseout', onDocumentMouseOut, false);
233. }
235. function onDocumentTouchStart( event )
236. {
237. if (event.touches.length == 1)
238. {
239. event.preventDefault();
241. mouseXOnMouseDown = event.touches[0].pageX - windowHalfX;
242. targetRotationOnMouseDownX = targetRotationX;
243. mouseYOnMouseDown = event.touches[0].pageY - windowHalfY;
244. targetRotationOnMouseDownY = targetRotationY;
245. }
246. }
248. function onDocumentTouchMove( event )
249. {
250. if (event.touches.length == 1)
251. {
252. event.preventDefault();
254. mouseX = event.touches[0].pageX - windowHalfX;
255. targetRotationX = targetRotationOnMouseDownX + (mouseX - mouseXOnMouseDown) * 0.05;
256. mouseY = event.touches[0].pageY - windowHalfY;
257. targetRotationY = targetRotationOnMouseDownY + (mouseX - mouseYOnMouseDown) * 0.05;
258. }
259. }

以上就是本文的全部内容，希望对大家的学习有所帮助。