{"id":696,"date":"2014-12-17T01:10:14","date_gmt":"2014-12-16T17:10:14","guid":{"rendered":"http:\/\/www.animator.idv.tw\/?p=696"},"modified":"2015-01-31T16:52:21","modified_gmt":"2015-01-31T08:52:21","slug":"%e8%a8%aa%e8%ab%87-ken-museth-on-openvdb","status":"publish","type":"post","link":"https:\/\/www.animator.idv.tw\/?p=696","title":{"rendered":"blenderdiplom\u8a2a\u8ac7 – Ken Museth on OpenVDB"},"content":{"rendered":"
\"Ken

Ken Museth<\/p><\/div>\n

Ken Museth\u8207blenderdiplom\u7684\u8a2a\u8ac7\uff0c\u770b\u770b\u5728Ken Museth\u7684\u5e36\u9818OpenVDB\u7684\u5718\u968a\u958b\u767c\u4e00\u500bOpenSource\u7684Library\u7684\u76ee\u7684\u8207\u672a\u4f86\u7684\u767c\u5c55\u3002<\/p>\n

\u8b6f\u8005:renderloop<\/p>\n

\u539f\u6587\u9023\u7d50
\nhttp:\/\/blenderdiplom.com\/en\/interviews\/574-interview-ken-museth-on-openvdb.html<\/a><\/p>\n

OpenVDB\u5c1a\u672a\u51fa\u73fe\u5728Blender\u4e4b\u4e2d\uff0c\u4f46\u76ee\u524dBlender\u5df2\u6709\u8a08\u756b\u5c07\u5176\u6574\u5408\u9032\u672a\u4f86\u7684\u7248\u672c\u3002\u4f60\u53ef\u80fd\u6703\u611f\u5230\u597d\u5947\uff0cOpenVDB\u5230\u5e95\u662f\u751a\u9ebc? BlenderDiplom \u9019\u6b21\u548c Dreamworks \u5167\u8ca0\u8cacOpenVDB\u958b\u767c\u9805\u76ee\u7684\u9996\u5e2d\u5de5\u7a0b\u5e2bKen Museth\uff0c\u8ac7\u8ac7\u9019\u9805\u8edf\u9ad4\u5c08\u6848\u4ee5\u53ca\u4f7f\u7528\u8005\u53ef\u4ee5\u5c0d\u4e00\u500b\u61c9\u7528OpenVDB\u7684\u8edf\u9ad4\u6709\u751a\u9ebc\u6a23\u7684\u671f\u671b\u3002<\/p>\n

BD: \u54c8\u56c9\uff0cKen\u3002\u73fe\u5728\u4f60\u6b63\u4efb\u8077\u65bcDreamworks\uff0c\u8acb\u554f\u4f60\u5728\u516c\u53f8\u5167\u5be6\u969b\u7684\u5de5\u4f5c\u5167\u5bb9\u70ba\u4f55?\u4f60\u8ca0\u8cac\u7684\u5c08\u6848\u662f\u751a\u9ebc\uff0c\u9084\u6709\u4f60\u5728OpenVDB\u4e2d\u6240\u53c3\u8207\u7684\u90e8\u5206\u70ba\u4f55?<\/span><\/p>\n

Ken: \u6211\u5f9e2009\u5e74\u958b\u59cb\u5728Los Angeles\u7684Dreamworks Animation\u5de5\u4f5c\u3002\u6211\u662f\u7279\u6548\u7814\u767c\u7e3d\u76e3(R&D VFX supervisor)\u548c\u8cc7\u6df1\u9996\u5e2d\u5de5\u7a0b\u5e2b(senior principal engineer)\u3002\u6211\u8ca0\u8cac\u4e00\u500b\u7814\u767c\u88fd\u7a0b\u5de5\u5177\u7684\u7814\u7a76\u5718\u968a\uff0c\u540c\u6642\u6211\u81ea\u5df1\u4e5f\u662f\u4e00\u4f4d\u8edf\u9ad4\u958b\u767c\u4eba\u54e1\u3002\u6211\u53c3\u8207VDB\u7684\u90e8\u5206? \u55ef\uff0c\u6211\u662f\u57282009\u5e74\u767c\u660e\u4e86VDB\u4e26\u767c\u8868\u76f8\u95dc\u7814\u7a76\u6210\u679c\u3002\u5b83\u9678\u7e8c\u88ab\u6539\u826f\u4e14\u516c\u958b\u65bc2011\u5e74\u7684SIGGRAPH\u5927\u6703\u3002\u6211\u5011\u5718\u968a\u7684\u6838\u5fc3\u8981\u52d9\u662f\u8ca0\u8cac\u7dad\u8b77\u3001\u64f4\u5c55\u548c\u767c\u4f48OpenVDB\u3002<\/p>\n

\"OpenVDB

OpenVDB \u64c1\u6709meshing \u7cfb\u7d71<\/p><\/div>\n

BD: \u4f5c\u70ba\u4e00\u822c\u4f7f\u7528\u8005\uff0c\u4f60\u53ef\u4ee5\u5f9e\u90a3\u4e9b\u652f\u63f4OpenVDB\u7684\u61c9\u7528\u7a0b\u5f0f\u4e2d\u671f\u5f85\u751a\u9ebc?<\/span><\/p>\n

Ken:\u3000\u8b93\u6211\u5011\u5148\u770b\u770b\u90a3\u4e9b\u958b\u767c\u8005\u5df2\u61c9\u7528\u591a\u5e74\u4e14\u5e38\u5728\u7b2c\u4e09\u65b9\u61c9\u7528\u7a0b\u5f0f\u4e2d\u51fa\u73fe\u7684\u5bb9\u7a4d(volume)\u67b6\u69cb\u3002\u4f7f\u7528\u8005\u5148\u5efa\u7acb\u4e00\u7a2e\u7acb\u65b9\u9ad4\u7684\u7d50\u69cb\uff0c\u800c\u6a21\u64ec\u7684\u6548\u679c\u5247\u88ab\u9650\u5236\u5728\u7acb\u65b9\u9ad4\u6240\u5305\u570d\u7684\u7bc4\u570d\u5167\uff0c\u90a3\u4e9b\u901a\u5e38\u662f\u6240\u8b02\u7684\u5bc6\u96c6\u6676\u683c(dense grids)\u3002\u7acb\u65b9\u9ad4\u7684\u5c3a\u5bf8\u5c0d\u65bc\u8a08\u7b97\u904e\u7a0b\u6240\u9700\u7684\u8a18\u61b6\u9ad4\u7528\u91cf\u6709\u8457\u5de8\u5927\u7684\u5f71\u97ff\u3002\u7576\u4f60\u63d0\u9ad8\u7acb\u65b9\u9ad4\u7684\u89e3\u6790\u5ea6\u6642\uff0c\u5176\u5167\u90e8\u4f7f\u7528voxel\u6578\u91cf\u6703\u8d8a\u4f86\u8d8a\u591a\u3002\u4e00\u500bvoxel\u53ef\u4ee5\u985e\u6bd4\u70ba\u4e00\u500b\u4e09\u7dad\u50cf\u7d20(pixel)\u3002\u6240\u4ee5\u554f\u984c\u4fbf\u662f\u90a3\u4e9b\u5bc6\u96c6\u6676\u683c\u9700\u8981\u76f8\u7576\u591a\u7684\u8a18\u61b6\u9ad4\u3002\u800cVDB\u5247\u662f\u8b93\u4f60\u62cb\u958b\u5916\u570d\u7acb\u65b9\u9ad4\u7684\u9650\u5236\uff0c\u8b93\u4f60\u7528\u4e00\u7a2e\u66f4\u7bc0\u7701\u7684\u65b9\u5f0f\u53bb\u5132\u5b58\u5167\u90e8\u7684\u8cc7\u8a0a\u3002<\/p>\n

\u5c0d\u65bc\u8edf\u9ad4\u4f7f\u7528\u8005\u800c\u8a00\uff0c\u9019\u610f\u5473\u8457\u53ef\u4ee5\u518d\u63d0\u9ad8\u90a3\u4e9b\u7159\u3001\u706b\u6216\u662f\u6c34\u7684\u6a21\u64ec\u7d30\u7bc0\u3002\u800c\u5c0d\u65bc\u6d41\u9ad4\u6a21\u64ec\u7684\u61c9\u7528\u7a0b\u5f0f\u800c\u8a00(\u5c24\u5176\u5728\u6a21\u64ec\u8cc7\u8a0a\u5132\u5b58\u5206\u5e03\u662f\u7a00\u758f\u7684\u60c5\u6cc1\u4e0b)\uff0cVDB\u6703\u662f\u4e00\u500b\u975e\u5e38\u597d\u7684\u9078\u9805\u3002OpenVDB\u5df2\u81ea2012\u5e74\u6574\u5408\u81f3Houdini\uff0c\u6240\u4ee5\u82e5\u4f60\u4f7f\u7528\u7684\u662f12.5\u6216\u4e4b\u5f8c\u7684\u7248\u672c\uff0c\u90a3\u4f60\u6b63\u662f\u4f7f\u7528\u5167\u5efa\u7684OpenVDB\u3002<\/p>\n

\u5927\u591a\u7531\u7279\u6548\u90e8\u9580\u88fd\u4f5c\u7684\u6548\u679c\u90fd\u727d\u626f\u5230\u5bb9\u7a4d(volumes)\u3002\u5178\u578b\u7684\u6548\u679c\u50cf\u662f\u52d5\u614b\u7684\u6c99\u5875\u3001\u7159\u9727\u3001\u6c34\u3001\u706b\u3001\u751a\u81f3\u662f\u7834\u788e(fracturing)\u3002\u8a31\u591a\u6548\u679c\u50cf\u662f\u525b\u9ad4\u52d5\u529b\u5b78(rigid body dynamics)\u548c\u7834\u788e\u4e26\u975e\u76f4\u63a5\u4f46\u537b\u9593\u63a5\u548c\u5bb9\u7a4d\u6709\u95dc\u4fc2\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u5bb9\u7a4d\u8cc7\u8a0a\u505a\u78b0\u649e\u5075\u6e2c\u4ee5\u907f\u514d\u7269\u4ef6\u7a7f\u63d2\u3002\u53e6\u4e00\u500b\u4f8b\u5b50\u5247\u662f\u4f7f\u7528\u5bb9\u7a4d\u8cc7\u8a0a\u505a\u5404\u985e\u578b\u7684\u7b97\u5716\u61c9\u7528\u3002\u7e3d\u800c\u8a00\u4e4b\uff0c\u8996\u89ba\u7279\u6548\u90e8\u9580\u975e\u5e38\u4ef0\u8cf4\u5bb9\u7a4d\u8cc7\u8a0a\u3002<\/p>\n

\"\u5b83\u53ef\u4ee5\u7528\u4f86\u505a\u6e05\u9664\u6a21\u578b\u7684\u4ea4\u96c6(intersection)\"

\u5b83\u53ef\u4ee5\u7528\u4f86\u505a\u6e05\u9664\u6a21\u578b\u7684\u4ea4\u96c6(intersection)<\/p><\/div>\n

BD: OpenVDB \u76ee\u524d\u88ab\u61c9\u7528\u65bc\u8a31\u591a\u7b2c\u4e09\u65b9\u5de5\u5177\u548c\u7b97\u5716\u8edf\u9ad4(renderers)\u3002<\/span><\/p>\n

Ken:\u3000Arnold \u5df2\u900f\u904e\u5916\u639b(plug-ins)\u7684\u5f62\u5f0f\u652f\u63f4\uff0c\u6b64\u5916\u4e5f\u6709\u5c0d\u65bcPixar Renderman\u7684\u652f\u63f4\u3002Realflow\u5e95\u5c64\u4e5f\u6709\u4f7f\u7528OpenVDB\u3002\u975e\u5e38\u591a\u61c9\u7528\u7a0b\u5f0f\u4f7f\u7528OpenVDB\u3002\u9019\u4e5f\u662fDreamworks\u6c7a\u5b9a\u958b\u653e\u539f\u59cb\u78bc\u7684\u4e3b\u8981\u52d5\u6a5f\u4e4b\u4e00\uff0c\u6240\u4ee5\u9019\u4e9b\u516c\u53f8\u53ef\u4ee5\u5e6b\u6211\u5011\u505a\u61c9\u7528\u7a0b\u5f0f\u6574\u5408\u7684\u5de5\u4f5c\uff0c\u8b93\u6211\u5011\u6709\u66f4\u591a\u7684\u6642\u9593\u53bb\u505a\u5176\u4ed6\u958b\u767c\u3002\u4e00\u822c\u4eba\u4e26\u4e0d\u77e5\u9053\u6211\u5011\u82b1\u4e86\u5927\u91cf\u7684\u6642\u9593\u53bb\u5c07\u6b64\u6280\u8853\u6574\u5408\u81f3\u73fe\u6709\u7684\u88fd\u7a0b(pipeline)\uff0c\u50cf\u662f\u958b\u767c\u4f7f\u7528\u8005\u4ecb\u9762\u3001\u8173\u672c\u8a9e\u8a00\u5c0d\u61c9\u548c\u5176\u4ed6\u652f\u63f4\u3002\u9019\u4e9b\u5de5\u4f5c\u82b1\u8cbb\u76f8\u7576\u591a\u7684\u6642\u9593\u3002\u6709\u4e86\u5176\u4ed6\u516c\u53f8\u7684\u5354\u4f5c\uff0c\u5e6b\u5fd9\u8655\u7406\u9019\u4e9b\u5de5\u4f5c\uff0c\u6211\u5011\u5f97\u4ee5\u5c07\u6642\u9593\u5c08\u6ce8\u65bcOpenVDB\u7684\u6539\u9032\u4e0a\u3002\u6211\u5011\u767c\u73fe\u56e0\u70ba\u6709\u8457SideFX\u7684\u6574\u5408\u8207\u7dad\u8b77\uff0c\u6211\u5011\u64c1\u6709\u66f4\u591a\u7684\u6642\u9593\u53bb\u5f9e\u4e8b\u6211\u5011\u771f\u6b63\u7684\u8981\u52d9\u2500\u5373\u662f\u5c07\u6b64\u6280\u8853\u505a\u9032\u4e00\u6b65\u7684\u63d0\u5347\u3002<\/p>\n

BD: \u9019\u662f\u5c07\u4f60\u5011\u7684\u539f\u59cb\u78bc\u958b\u653e\u7684\u597d\u8655\u4e4b\u4e00\uff0c\u90a3\u9ebc\u7f3a\u9ede\u6703\u662f\u751a\u9ebc\u5462?<\/span><\/p>\n

Ken:\u3000\u7f3a\u9ede\u4e4b\u4e00\u662f\u8017\u6642\u3002\u5927\u91cf\u7684\u6642\u9593\u90fd\u82b1\u5728\u7dad\u8b77\u5132\u5b58\u5eab(repositories)\u3001\u5efa\u7f6e\u7cfb\u7d71\u3001\u64b0\u5beb\u6587\u4ef6\u548c\u5176\u4ed6\u985e\u4f3c\u7684\u5de5\u4f5c\u3002\u540c\u6642\u4e5f\u6709\u8a31\u591a\u4f86\u81ea\u958b\u6e90\u793e\u7fa4\u7684\u58d3\u529b\u3002\u6211\u5011\u63a5\u5230\u8a31\u591a\u95dc\u65bc\u65b0\u529f\u80fd\u7684\u8acb\u6c42\uff0c\u5178\u578b\u7684\u9700\u6c42\u50cf\u662f\u300e\u70ba\u4f55\u4f60\u5011\u4e0d\u652f\u63f4Windows\u5e73\u53f0\u300f\u4f60\u7e3d\u662f\u5fc5\u9808\u53bb\u5728\u9019\u4e9b\u8acb\u6c42\u548cDrewmworks\u5167\u90e8\u7684\u9700\u6c42\u4e4b\u9593\u505a\u53d6\u6368\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u56e0\u70baDreamworks\u5167\u90e8\u4f7f\u7528\u7684\u662fLinux\u5e73\u53f0\uff0c\u6240\u4ee5\u8f03\u6c92\u6709\u7279\u6b8a\u7684\u52d5\u529b\u53bb\u652f\u63f4Windows\u4e0a\u7684\u958b\u767c\u5de5\u4f5c\u3002\u4f46\u6211\u5011\u9084\u7b97\u5e78\u904b\uff0c\u56e0\u70baSideFX\u7684\u7522\u54c1\u652f\u63f4Windows\u5e73\u53f0\uff0c\u6240\u4ee5\u9019\u5de5\u4f5c\u662f\u7531\u4ed6\u5011\u5728\u8655\u7406\u3002\u8655\u7406\u9019\u4e9b\u5916\u90e8\u58d3\u529b\u5be6\u969b\u4e0a\u662f\u8017\u6642\u7684\uff0c\u9019\u7b97\u662f\u958b\u653e\u539f\u59cb\u78bc\u7684\u4e00\u90e8\u5206\u7f3a\u9ede\u3002\u4f46\u9019\u4e9b\u7f3a\u9ede\u7455\u4e0d\u63a9\u745c\uff0c\u5982\u540c\u6211\u4e4b\u524d\u63d0\u5230\u7684\uff0c\u9996\u8981\u7684\u512a\u9ede\u662f\u61c9\u7528\u6574\u5408\uff0c\u4e8b\u5be6\u662f\u6211\u5011\u4e0d\u9700\u8981\u53bb\u652f\u63f4\u6240\u6709\u5de5\u5177\u7684\u6574\u5408\u5de5\u4f5c\uff0c\u56e0\u6b64\u6211\u5011\u6709\u66f4\u591a\u7684\u6642\u9593\u53bb\u9032\u884c\u5176\u4ed6\u958b\u767c\u3002<\/p>\n

\u6211\u5011\u767c\u73fe\u7684\u53e6\u4e00\u9805\u512a\u9ede\u662f\uff0c\u958b\u653e\u539f\u59cb\u78bc\u662f\u4e00\u7a2e\u975e\u5e38\u597d\u7684\u65b9\u5f0f\u53bb\u548c\u5176\u4ed6\u96fb\u5f71\u5de5\u4f5c\u5ba4\u53ca\u5b78\u754c\u7814\u7a76\u4eba\u54e1\u9032\u884c\u5354\u4f5c\u3002\u5be6\u969b\u60c5\u6cc1\u662f\u6211\u5011\u6709\u4e00\u500b\u8edf\u9ad4\uff0c\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u4f7f\u7528\u4e26\u505a\u51fa\u8ca2\u737b\u800c\u6c92\u6709\u667a\u6167\u7522\u6b0a\u65b9\u9762\u7684\u554f\u984c\uff0c\u9019\u5c0d\u5354\u4f5c\u76f8\u7576\u6709\u76ca\u8655\uff0c\u4e14\u6211\u5011\u5df2\u591a\u6b21\u6574\u5408\u904e\u5916\u90e8\u958b\u767c\u8005\u7684\u7a0b\u5f0f\u78bc\u8ca2\u737b\u3002\u6709\u4e9b\u6642\u5019\u5b78\u8853\u7814\u7a76\u793e\u7fa4\u6703\u4f7f\u7528VDB\u7576\u4f5c\u7814\u7a76\u958b\u767c\u7684\u57fa\u790e\uff0c\u800c\u4e00\u4e9b\u4ed6\u5011\u7684\u7814\u7a76\u60f3\u6cd5\u4e5f\u6709\u53ef\u80fd\u6703\u53cd\u904e\u4f86\u88ab\u6574\u5408\u9032\u4f86\uff0c\u6211\u5011\u4e5f\u66fe\u7d93\u548c\u5176\u4ed6\u5de5\u4f5c\u5ba4\u6709\u904e\u5e7e\u6b21\u9019\u6a23\u7684\u7d93\u9a57\u3002<\/p>\n

BD: \u5728\u5169\u5e74\u524d\u7684FMX\u6703\u8b70\u4e2d\uff0c\u53e6\u4e00\u9805\u53d7\u6b61\u8fce\u7684VFX\u958b\u6e90\u8a08\u756b\u7684\u9996\u5e2d\u5de5\u7a0b\u5e2b\u66fe\u8aaa\uff0c\u76f8\u8f03\u65bc\u5167\u90e8\u958b\u767c\uff0c\u958b\u653e\u539f\u59cb\u78bc\u4e26\u4e0d\u4e00\u5b9a\u8f03\u7bc0\u7701\u6210\u672c\uff0c\u4f46\u4e5f\u4e0d\u6703\u66f4\u70ba\u6602\u8cb4\u3002\u8acb\u554f\u4f60\u5c0d\u65bc\u9019\u65b9\u9762\u76f4\u89c0\u7684\u60f3\u6cd5\u70ba\u4f55?<\/span><\/p>\n

Ken: \u6211\u60f3\u6211\u6703\u540c\u610f\u4ed6\u7684\u8aaa\u6cd5\uff0c\u958b\u653e\u4e26\u4e0d\u6703\u66f4\u6602\u8cb4\u3002\u4f46\u66f4\u91cd\u8981\u7684\u662f\uff0c\u958b\u653e\u539f\u59cb\u78bc\u63d0\u9ad8\u4e86\u54c1\u8cea\u7684\u6a19\u6e96! \u516c\u958b\u7a0b\u5f0f\u78bc\u7684\u54c1\u8cea\u9060\u512a\u65bc\u90a3\u4e9b\u91dd\u5c0d\u5167\u90e8\u958b\u767c\u7684\u7a0b\u5f0f\u78bc\u3002\u4f60\u548c\u5168\u4e16\u754c\u5171\u4eab\u7a0b\u5f0f\u78bc\uff0c\u6bcf\u500b\u4eba\u90fd\u53ef\u4ee5\u770b\u4f60\u7684\u6210\u54c1\uff0c\u9019\u662f\u63d0\u5347\u7a0b\u5f0f\u78bc\u548c\u6587\u4ef6\u54c1\u8cea\u7684\u5de8\u5927\u9a45\u52d5\u529b\u3002\u826f\u597d\u7de8\u5beb\u7684\u7a0b\u5f0f\u78bc\u3001\u8aaa\u660e\u6587\u4ef6\u548c\u7c21\u6f54\u7684API\u6703\u4f7f\u5f97\u5c08\u6848\u7dad\u8b77\u7684\u5de5\u4f5c\u8f03\u7c21\u55ae\u3002<\/p>\n

BD: \u9019\u6b63\u662f Larry Gritz\u544a\u8a34\u6211\u5011\u95dc\u65bc\u958b\u653eOSL(Open Shading Language)\u7684\u7d93\u9a57\u3002\u4ed6\u540c\u6642\u63d0\u5230\u958b\u653e\u539f\u59cb\u78bc\u8b93\u958b\u767c\u8005\u9762\u5c0d\u4f7f\u7528\u7fa4\u773e\u3002\u50cf\u662f\u6536\u5230\u4e00\u5806\u96fb\u5b50\u4fe1\u4ef6\u4e4b\u985e\u7684\uff0c\u8acb\u554f\u9019\u662f\u597d\u3001\u9084\u662f\u4e0d\u592a\u597d\u5462?<\/span><\/p>\n

Ken: \u6b63\u662f\u5982\u6b64! \u5766\u767d\u8aaa\uff0c\u6211\u5011\u5728\u8a08\u756b\u4e00\u958b\u59cb\u524d\u4e26\u6c92\u610f\u8b58\u5230\uff0c\u4f46\u9019\u7684\u78ba\u8b93\u6211\u5011\u611f\u5230\u9a5a\u8a1d\uff0c\u662f\u4ee4\u4eba\u975e\u5e38\u6109\u6085\u7684\u90a3\u4e00\u7a2e\u9a5a\u559c\u3002\u66fe\u6709Dreamworks\u7684\u958b\u767c\u8005\u770b\u8457OpenVDB\u7684\u539f\u59cb\u78bc\uff0c\u7136\u5f8c\u544a\u8a34\u6211\u5011\u8aaa\u9019\u662f\u4ed6\u5011\u5728\u516c\u53f8\u5167\u770b\u904e\u6700\u7c21\u6f54\u7684\u7a0b\u5f0f\u78bc\uff0c\u800c\u9019\u6b63\u662f\u6211\u5011\u60f3\u8981\u9054\u6210\u7684\u76ee\u6a19\u3002<\/p>\n

BD: \u4f60\u5011\u6709\u5f9e\u5916\u90e8\u7372\u5f97\u5927\u91cf\u8b9a\u7f8e\u6216\u662f\u66f4\u591a\u6279\u8a55\u55ce?<\/span><\/p>\n

Ken: \u6211\u60f3OpenVDB\u7684\u554f\u984c\u4e4b\u4e00\u662f\u4f7f\u7528\u5927\u91cfmetaprogramming\u7684\u6280\u5de7\u4f86\u5be6\u4f5c\u3002\u5118\u7ba1\u5df2\u6709\u8a73\u76e1\u7684\u6587\u4ef6\u8a18\u9304\uff0c\u4f46\u82e5\u662f\u4f60\u4e0d\u719f\u6089\u9019\u985e\u578b\u7684\u7de8\u7a0b\u6280\u8853\u7684\u8a71\uff0c\u5728\u770b\u7a0b\u5f0f\u78bc\u7684\u6642\u5019\u6703\u8f03\u96e3\u53bb\u4e86\u89e3\u8207\u8ffd\u6714\u3002\u5be6\u969b\u4e0a\uff0c\u95dc\u65bcVDB\u9019\u8cc7\u6599\u7d50\u69cb\u672c\u8eab\u662f\u6709\u4e00\u9ede\u8907\u96dc\uff0c\u6211\u5011\u50c5\u6709\u5c11\u6578\u4eba\u66fe\u91dd\u5c0d\u9019\u90e8\u5206\u505a\u904e\u7de8\u4fee\u8ca2\u737b\uff0c\u6211\u60f3\u9019\u662f\u56e0\u70ba\u5b83\u8907\u96dc\u5230\u6709\u9ede\u5687\u4eba\u7684\u7de3\u6545\u3002\u76f4\u63a5\u53bb\u4e86\u89e3\u4e26\u4f7f\u7528\u6b64\u8cc7\u6599\u7d50\u69cb\uff0c\u4e26\u4e0d\u662f\u5bb9\u6613\u7684\u4e00\u4ef6\u4e8b\u3002\u800c\u6211\u5011\u7372\u5f97\u7684\u5927\u591a\u6578\u7de8\u4fee\u8ca2\u737b\uff0c\u4e3b\u8981\u4f86\u81ea\u65bc\u5efa\u69cb\u5728\u6b64\u8cc7\u6599\u7d50\u69cb\u4e4b\u4e0a\u7684\u5de5\u5177\u7a0b\u5f0f\uff0c\u7576\u7136\u9019\u4e5f\u662f\u975e\u5e38\u975e\u5e38\u6709\u5e6b\u52a9\u3002<\/p>\n

\"OpenVDB\u53ef\u4ee5\u5132\u5b58\u5927\u91cf\u4e0d\u540c\u5c6c\u6027\u7684\u9ad4\u7a4d\u8cc7\u8a0a\"

OpenVDB\u53ef\u4ee5\u5132\u5b58\u5927\u91cf\u4e0d\u540c\u5c6c\u6027\u7684\u9ad4\u7a4d\u8cc7\u8a0a<\/p><\/div>\n

BD: \u8acb\u554f\u9019\u6b21\u958b\u653e\u539f\u59cb\u78bc\u7684\u904e\u7a0b\u662f\u8271\u8f9b\u7684\u55ce?<\/span><\/p>\n

Ken: \u7576\u7136! OpenVDB \u662f Dreamworks Animation \u7b2c\u4e00\u9805\u4e14\u662f\u76ee\u524d\u552f\u4e00\u7684\u958b\u6e90\u8a08\u756b\u3002\u5e7e\u4e4e\u82b1\u4e86\u6574\u6574\u5169\u5e74\u624d\u7372\u5f97\u6279\u51c6\u3002\u5927\u5bb6\u4e00\u8def\u4e0a\u90fd\u975e\u5e38\u652f\u6301\uff0c\u6211\u5011\u672a\u66fe\u78b0\u904e\u7a92\u7919\u96e3\u884c\u7684\u60c5\u6cc1\uff0c\u4f46\u904e\u7a0b\u82b1\u4e86\u6cd5\u5f8b\u90e8\u9580\u76f8\u7576\u591a\u7684\u6642\u9593\u53bb\u5be9\u8996\u3002\u7b2c\u4e09\u65b9\u61c9\u7528\u6574\u5408\u662f\u4e3b\u8981\u7684\u8ce3\u9ede\u3002\u4e8b\u5be6\u4e0aSideFX\u61c9\u5141\u652f\u63f4\u6211\u5011\u7684\u958b\u767c\u5de5\u4f5c\u5c0d\u9019\u65b9\u9762\u6709\u8457\u6975\u5927\u7684\u5e6b\u52a9\u3002<\/p>\n

BD: SideFX \u662f\u5f9e\u4e00\u958b\u59cb\u5c31\u53c3\u8207OpenVDB\u7684\u5354\u4f5c\u55ce?<\/span><\/p>\n

Ken: \u662f\u7684\uff0c\u6211\u5011\u548cSideFX\u7684\u958b\u767c\u4eba\u54e1\u5bc6\u5207\u5730\u5408\u4f5c\uff0c\u4ed6\u5011\u6703\u5be9\u8996\u6211\u5011\u7684\u7a0b\u5f0f\u78bc\u4e26\u63d0\u4f9b\u4fee\u6b63\u7684\u5efa\u8b70\u3002\u9019\u662f\u975e\u5e38\u7dca\u5bc6\u7684\u5354\u4f5c\u95dc\u4fc2\u3002<\/p>\n

BD: \u4f60\u5e0c\u671b\u770b\u5230\u90a3\u4e9b\u7b2c\u4e09\u65b9\u61c9\u7528\u7a0b\u5f0f\u63a1\u7528OpenVDB?<\/span><\/p>\n

Ken: \u8209\u4f8b\u4f86\u8aaa\uff0c\u6211\u5011\u5e0c\u671b\u5b83\u88ab\u6574\u5408\u9032Maya\uff0c\u540c\u6642\u4e5f\u6a02\u898b\u88abBlender\u6240\u63a1\u7528\u3002\u6211\u5011\u5e0c\u671b\u770b\u5230OpenVDB\u88ab\u61c9\u7528\u65bc\u9019\u5169\u5927\u4e3b\u8981\u7684\u7b2c\u4e09\u65b9\u5c08\u6848\u3002\u6211\u5011\u91dd\u5c0dMaya\u6709\u4e00\u4e9b\u57fa\u672c\u7684\u652f\u63f4\uff0c\u5be6\u969b\u4e0a\u5df2\u958b\u653e\u5e7e\u500bMaya\u7bc0\u9ede(nodes)\u5be6\u4f5c\uff0c\u4f46\u6211\u5011\u5167\u90e8\u4e26\u4e0d\u5e38\u4f7f\u7528Maya\u4f86\u88fd\u4f5c\u5bb9\u7a4d\u7279\u6548\uff0c\u6240\u4ee5\u6211\u5011\u5e0c\u671b\u958b\u6e90\u793e\u7fa4\u4e2d\u6703\u6709\u4eba\u63a5\u624b\u9019\u90e8\u5206\u7684\u958b\u767c\u5de5\u4f5c\u3002<\/p>\n

BD: \u4f60\u76ee\u524d\u662f\u5426\u6709\u8a08\u756b\u5c07OpenVDB\u79fb\u690d\u5230GPU\u67b6\u69cb\u4e0a?<\/span><\/p>\n

Ken: \u90a3\u662f\u5f88\u597d\u7684\u60f3\u6cd5\u3002\u4f46\u6211\u5011\u76ee\u524d\u5c1a\u672a\u6392\u5b9a\u8a08\u756b\uff0c\u800c\u4e14\u79fb\u690d\u5de5\u4f5c\u4e5f\u4e26\u975e\u5168\u7136\u76f4\u89c0\u660e\u77ad\u3002OpenVDB\u904e\u53bb\u91dd\u5c0dCPU\u67b6\u69cb\u505a\u9ad8\u5ea6\u6700\u4f73\u5316\uff0c\u4f46GPU\u662f\u4e00\u500b\u5fb9\u5e95\u4e0d\u540c\u7684\u786c\u9ad4\u67b6\u69cb\u3002\u9019\u4e0d\u662f\u4e00\u9805\u5bb9\u6613\u7684\u5de5\u4f5c\uff0c\u4f46\u7121\u7591\u662f\u4e00\u500b\u975e\u5e38\u6709\u8da3\u7684\u65b9\u5411\u3002\u6211\u5011\u904e\u53bb\u66fe\u548cNVidia\u63a5\u89f8\uff0c\u4ed6\u5011\u544a\u8a34\u6211\u5011\u4ed6\u5011\u5728\u79fb\u690d\u7684\u90e8\u5206\u5df2\u6709\u521d\u6b65\u7684\u6210\u529f\u7d50\u679c\uff0c\u4f46\u6211\u731c\u6211\u5011\u5728\u5be6\u4f5c\u9762\u5fc5\u9808\u505a\u8a31\u591a\u76f8\u95dc\u8b8a\u52d5\u3002\u6211\u5011\u516c\u53f8\u5167\u90e8\u6709\u4e00\u500bGPU\u7684\u7b97\u5716\u5de5\u5177\u7b97\u662f\u6709\u67d0\u7a2e\u7a0b\u5ea6\u7684\u76f8\u95dc\u652f\u63f4\uff0c\u4f46\u5b83\u4e3b\u8981\u662f\u5728\u628a\u8cc7\u6599\u8b80\u9032\u986f\u793a\u5361\u8a18\u61b6\u9ad4\u524d\uff0c\u5c07OpenVDB\u7684\u8cc7\u6599\u7d50\u69cb\u8f49\u63db\u81f3\u4e00\u500b\u968e\u5c64\u5316\u7684\u8cc7\u6599\u6846\u683c(tiled grid)\u3002
\n\u7c21\u55ae\u7684\u7b54\u6848\u662f: GPU\u67b6\u69cb\u7684\u652f\u63f4\u5de5\u4f5c\u662f\u6211\u5011\u6703\u53bb\u95dc\u6ce8\u7684\u65b9\u5411\u3002<\/p>\n

\"\u5728OpenGL\u4f7f\u7528GPU\u505a\u5373\u6642\u986f\u793aOpenVDB\u7684\u8cc7\u6599\"

\u5728OpenGL\u4f7f\u7528GPU\u505a\u5373\u6642\u986f\u793aOpenVDB\u7684\u8cc7\u6599<\/p><\/div>\n

BD: \u4f60\u9084\u6709\u751a\u9ebc\u5176\u4ed6\u91dd\u5c0dOpenVDB\u7684\u8a08\u756b? \u5132\u5b58\u7c92\u5b50\u8cc7\u6599(particle data)\u7684\u8cc7\u6599\u7d50\u69cb\u6703\u662f\u5176\u4e2d\u4e4b\u4e00\u55ce?<\/span><\/p>\n

Ken: \u662f\u7684\uff0c\u7c92\u5b50\u8cc7\u6599\u662f\u6211\u6b63\u5728\u63a8\u52d5\u7684\u4e00\u9805\u5927\u8a08\u756b\u3002\u5728\u5373\u5c07\u4e0a\u6620\u7684\u300e\u99b4\u9f8d\u9ad8\u624b2\u300f\u7684\u88fd\u4f5c\u904e\u7a0b\u4e2d\uff0c\u6211\u5011\u9762\u81e8\u5230\u5c07\u5927\u91cf\u7c92\u5b50\u8cc7\u6599(\u50cf\u662f\u4e09\u5104\u9846\u7c92\u5b50)\u8f49\u63db\u5230VDB\u7684\u554f\u984c\uff0c\u6211\u5011\u767c\u89ba\u76ee\u524d\u64c1\u6709\u7684\u5de5\u5177\u7121\u6cd5\u6709\u6548\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u56e0\u6b64\u6211\u5011\u958b\u59cb\u627e\u5c0b\u53ef\u4ee5\u5c07\u7c92\u5b50\u8cc7\u6599\u5132\u5b58\u5728\u76f8\u540c\u6a39\u72c0\u8cc7\u6599\u7d50\u69cb\u7684\u65b9\u5f0f\uff0c\u5f8c\u4f86\u6211\u5011\u5728\u9019\u90e8\u5206\u4e5f\u7372\u5f97\u986f\u8457\u7684\u6210\u529f\u3002\u5728\u4eca\u5e74\u590f\u5929\u7684SIGGRAPH\u5927\u6703\u4e0a\uff0c\u6211\u5011\u5e0c\u671b\u5728\u5c07\u5176\u7576\u4f5cOpenVDB 3.0\u7684\u4e00\u90e8\u5206\u800c\u516c\u958b\u3002\u9019\u540c\u6642\u4e5f\u662f\u4e00\u9805\u6709\u8da3\u7684\u8a08\u756b\uff0c\u56e0\u70ba\u9019\u662f\u6211\u5011\u7b2c\u4e00\u6b21\u6b63\u5f0f\u8207\u5176\u4ed6\u5de5\u4f5c\u5ba4\u5354\u4f5c\u958b\u767c\u3002\u4e00\u4f4d\u4f86\u81eaDouble Negative\u7684\u7814\u7a76\u54e1\u5c07\u6703\u904e\u4f86\u8207\u6211\u5011\u5408\u4f5c\u3002<\/p>\n

\u9019\u5927\u6982\u662f\u6211\u5011\u76ee\u524d\u6700\u5927\u7684\u958b\u767c\u8a08\u756b\uff0c\u4f46\u6211\u5011\u540c\u6642\u95dc\u6ce8\u7d30\u7bc0\u5c64\u6b21(level-of-detail)\u3002\u6240\u4ee5\u6211\u5011\u5617\u8a66\u8457\u53bb\u627e\u51fa\u5982\u4f55\u5132\u5b58\u4e0d\u540c\u89e3\u6790\u5ea6\u7684\u5bb9\u7a4d\u8cc7\u6599\uff0c\u9019\u6a23\u7b97\u5716\u8edf\u9ad4\u5c31\u53ef\u4ee5\u6839\u64da\u8207\u93e1\u982d\u7684\u8ddd\u96e2\u9060\u8fd1\u53bb\u9078\u64c7\u9069\u7576\u7684\u8cc7\u6599\u89e3\u6790\u5ea6\u3002<\/p>\n

\u6211\u5011\u4e5f\u60f3\u8981\u6709\u96f2\u7684\u5efa\u6a21\u5de5\u5177\uff0c\u540c\u6642\u6211\u5011\u4e5f\u6b63\u5728\u7814\u7a76\u8a18\u61b6\u9ad4\u8d85\u8f09(out-of-core)\u7684\u8b80\u53d6\u6280\u8853\u3002VDB\u6703\u7ba1\u7406\u5ef6\u9072\u8b80\u53d6\u7684\u6642\u6a5f\uff0c\u6240\u4ee5\u7576\u5f9e\u7b97\u5716\u8edf\u9ad4\u767c\u51fa\u7684\u5149\u7dda\u5c04\u5230\u4e0d\u540c\u7684\u7a7a\u9593\u5340\u57df\u6642\uff0c\u5b83\u50c5\u6703\u8b80\u53d6\u5468\u906d\u76f8\u9130\u90e8\u5206\u7684\u8cc7\u6599\uff0c\u800c\u975e\u5c07\u6240\u6709\u7684\u5bb9\u7a4d\u8cc7\u8a0a\u8b80\u9032\u8a18\u61b6\u9ad4\u3002<\/p>\n

BD: \u5f9e\u8a18\u61b6\u9ad4\u4f7f\u7528\u91cf\u7684\u89d2\u5ea6\u4f86\u770b\uff0c\u4f60\u8a8d\u70ba\u4f7f\u7528GPU\u7b97\u5716\u5728\u672a\u4f86\u6703\u662f\u53ef\u884c\u7684\u55ce?<\/span><\/p>\n

Ken: \u57fa\u672c\u4e0a\uff0c\u6211\u5011\u8655\u7406\u7684\u5bb9\u7a4d\u8cc7\u6599\u5f88\u5c11\u8d85\u904e\u5e7eGB\uff0c\u6240\u4ee5\u53ea\u8981\u4f60\u7684\u986f\u793a\u5361\u6709\u8db3\u5920\u91cf\u7684\u8a18\u61b6\u9ad4\uff0c\u90a3\u61c9\u8a72\u662f\u53ef\u884c\u7684\u3002<\/p>\n

BD: \u90a3\u95dc\u65bc\u5206\u6563\u5f0f\u7db2\u8def\u7b97\u5716\u7684\u6280\u8853\u5462?<\/span><\/p>\n

Ken: \u6211\u5011\u8003\u616e\u904e\u6b64\u4e8b\uff0c\u4f46\u9019\u4e26\u4e0d\u662f\u6211\u5011\u5728Dreamworks\u901a\u5e38\u4f7f\u7528\u7684\u6a5f\u5236\u3002\u6211\u5011\u6709\u4e00\u500b\u7b97\u5716\u8fb2\u5834(render farm)\uff0c\u4f46\u6bcf\u4e00\u500b\u8a08\u7b97\u6838\u5fc3\u90fd\u64c1\u6709\u5b8c\u6574\u5834\u666f\u7684\u526f\u672c\u3002\u6211\u60f3OpenVDB\u53ef\u4ee5\u61c9\u4ed8\u6b64\u985e\u578b\u7684\u7b97\u5716\u6a5f\u5236\uff0c\u56e0\u70ba\u5b83\u662f\u4f7f\u7528\u4e00\u500b\u968e\u5c64\u5316\u8cc7\u6599\u6846\u683c(tile grid)\uff0c\u672b\u7aef\u7bc0\u9ede(leaf node)\u53ef\u4ee5\u88ab\u5206\u914d\u81f3\u8a31\u591a\u4e0d\u540c\u7684\u96fb\u8166\u3002\u6211\u66fe\u807d\u8aaa\u6709\u4e00\u9593\u516c\u53f8\u5be6\u969b\u61c9\u7528\u6b64\u6982\u5ff5\u5230\u6db2\u9ad4\u89e3\u7b97\u5668\u4e0a(liquid solver)\uff0c\u4ed6\u5011\u56de\u5831\u8aaa\u9019\u662f\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u5f0f\u3002<\/p>\n

BD: \u4f60\u8a8d\u70ba\u76ee\u524d\u5728Dreamworks\u5167\u90e8\uff0c\u662f\u5426\u6709\u5176\u4ed6\u4efb\u4f55\u4e00\u9805\u958b\u767c\u5c08\u6848\u6703\u5f9e\u958b\u653e\u539f\u59cb\u78bc\u4e2d\u53d7\u76ca?<\/span><\/p>\n

Ken: \u6211\u5011\u8a0e\u8ad6\u904e\u4e00\u4e9b\u5c08\u6848\uff0c\u4f46\u6211\u60f3\u5176\u4e2d\u6c92\u6709\u4efb\u4f55\u4e00\u9805\u662f\u6b63\u5728\u88fd\u7a0b\u4e0a\u904b\u4f5c\u7684\u5c08\u6848\u3002\u904e\u53bb\u66fe\u6709\u4e00\u4e9b\u8a0e\u8ad6\u662f\u95dc\u65bc\u5728OpenVDB\u4e4b\u524d\uff0c\u5148\u555f\u7528\u4e00\u500b\u5c08\u6848\u7576\u5be6\u9a57\u6e2c\u8a66\u3002\u6211\u4e26\u4e0d\u77e5\u6089\u5167\u90e8\u6709\u4efb\u4f55\u5373\u5c07\u958b\u653e\u7684\u8edf\u9ad4\u5c08\u6848\uff0c\u4f46\u5728OpenVDB\u7684\u6210\u529f\u7d93\u9a57\u4e0b\uff0c\u82e5\u6709\u4efb\u4f55\u5176\u4ed6\u958b\u653e\u539f\u59cb\u78bc\u7684\u8a08\u756b\u9678\u7e8c\u958b\u555f\uff0c\u6211\u4e5f\u4e0d\u6703\u611f\u5230\u610f\u5916\u3002<\/p>\n

\u6240\u6709\u7684\u6587\u7ae0\u5167\u7684\u5716\u7247\u7248\u6b0a\u7686\u5c6c Dreamworks Animation \u6240\u6709<\/p>\n","protected":false},"excerpt":{"rendered":"

Ken Museth\u8207blenderdiplom\u7684\u8a2a\u8ac7\uff0c\u770b\u770b\u5728Ken Museth\u7684\u5e36\u9818OpenVDB\u7684\u5718\u968a\u958b\u767c\u4e00\u500bOpenSource\u7684Library\u7684\u76ee\u7684\u8207\u672a\u4f86\u7684\u767c\u5c55\u3002 \u8b6f\u8005:renderloop\u2026<\/p>\n

\u7e7c\u7e8c\u95b1\u8b80<\/i><\/a><\/p>\n","protected":false},"author":2,"featured_media":697,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[78,60,61],"_links":{"self":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/696"}],"collection":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=696"}],"version-history":[{"count":5,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/696\/revisions"}],"predecessor-version":[{"id":894,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/696\/revisions\/894"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/media\/697"}],"wp:attachment":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}