{"id":203070,"date":"2020-11-26T04:02:34","date_gmt":"2020-11-25T20:02:34","guid":{"rendered":"http:\/\/4563.org\/?p=203070"},"modified":"2020-11-26T04:02:34","modified_gmt":"2020-11-25T20:02:34","slug":"single-depth-peeling-%e9%a1%ba%e5%ba%8f%e6%97%a0%e5%85%b3%e6%b8%b2%e6%9f%93oit","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=203070","title":{"rendered":"Single Depth peeling \u987a\u5e8f\u65e0\u5173\u6e32\u67d3(OIT)"},"content":{"rendered":"
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Single Depth peeling \u987a\u5e8f\u65e0\u5173\u6e32\u67d3(OIT) <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : zoule <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u4ec0\u4e48\u662f\u987a\u5e8f\u65e0\u5173\u6e32\u67d3<\/strong><\/p>\n

\u5728 3D \u6e32\u67d3\u4e2d\uff0c\u7269\u4f53\u7684\u6e32\u67d3\u662f\u6309\u4e00\u5b9a\u7684\u987a\u5e8f\u6e32\u67d3\u7684\uff0c\u8fd9\u4e5f\u5c31\u53ef\u80fd\u5bfc\u81f4\u534a\u900f\u660e\u7684\u7269\u4f53\u5148\u4e8e\u4e0d\u900f\u660e\u7684\u7269\u4f53\u6e32\u67d3\uff0c\u7ed3\u679c\u5c31\u662f\u53ef\u80fd\u51fa\u73b0\u534a\u900f\u660e\u7269\u4f53\u540e\u7684\u7269\u4f53\u7531\u4e8e\u6df1\u5ea6\u906e\u6321\u800c\u6ca1\u6709\u6e32\u67d3\u51fa\u6765\u3002\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u4f1a\u5148\u6e32\u67d3\u6240\u6709\u7684\u4e0d\u900f\u660e\u7269\u4f53\u518d\u6e32\u67d3\u534a\u900f\u660e\u7269\u4f53\u6216\u8005\u6309\u6df1\u5ea6\u8fdb\u884c\u6392\u5e8f\u6765\u89e3\u51b3\u3002\u4f46\u8fd9\u6837\u4ecd\u7136\u65e0\u6cd5\u89e3\u51b3\u534a\u900f\u660e\u7269\u4f53\u4e4b\u95f4\u7684\u900f\u660e\u6548\u679c\u6e32\u67d3\u9519\u8bef\u95ee\u9898\uff0c\u7279\u522b\u662f\u7269\u4f53\u4e4b\u95f4\u5b58\u5728\u4ea4\u53c9\u65e0\u6cd5\u901a\u8fc7\u7b80\u5355\u7684\u6392\u5e8f\u6765\u89e3\u51b3\u3002\u4e8e\u662f\u5c31\u6709\u4e00\u4e9b\u7528\u4e13\u95e8\u6765\u89e3\u51b3\u534a\u900f\u660e\u7269\u4f53\u6e32\u67d3\u7b97\u6cd5\uff0cOIT \u7b97\u6cd5\u5373 Order Independent Transparency \uff08\u987a\u5e8f\u65e0\u5173\u7684\u534a\u900f\u660e\u6e32\u67d3\uff09\u3002Depth Peeling \u662f\u4f17\u591a OIT \u7b97\u6cd5\u91cc\u53ef\u4ee5\u5f97\u5230\u7cbe\u786e blending \u7ed3\u679c\u7684\u4e00\u4e2a\uff0c\u5728\u975e\u6e38\u620f\u7684 3d \u5e94\u7528\u573a\u666f\u4e2d\u5e94\u8be5\u8fd8\u662f\u5f88\u6709\u4ef7\u503c\u7684\u3002<\/p>\n

\"Single<\/p>\n

\u200b \u4e24\u4e2a\u4ea4\u53c9\u534a\u900f\u660e\u56db\u8fb9\u5f62\uff08\u672a\u4f7f\u7528 OIT \u6e32\u67d3\uff09<\/p>\n

\"Single<\/p>\n

\u200b \u4e24\u4e2a\u4ea4\u53c9\u534a\u900f\u660e\u56db\u8fb9\u5f62\uff08\u4f7f\u7528 OIT \u6e32\u67d3\uff09<\/p>\n

Single Depth Peeling \u539f\u7406<\/strong><\/p>\n

Single Depth Peeling \u539f\u6587<\/p>\n

Single Depth Peeling \u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u901a\u8fc7\u591a\u6b21\u7ed8\u5236\uff0c\u6bcf\u6b21\u7ed8\u5236\u5265\u79bb\u79bb\u76f8\u673a\u6700\u9760\u8fd1\u7684\u4e00\u5c42\uff0c\u50cf\u5265\u6d0b\u8471\u4e00\u6837\u5c42\u5c42\u5265\u5f00\uff0c\u6309\u987a\u5e8f\u6df7\u5408\u5c31\u5f97\u5230\u4e86\u7cbe\u786e\u7684\u6df7\u5408\u7ed3\u679c\u3002\u65e2\u7136\u6709 Single Depth Peeling\uff0c\u8fd8\u6709\u4e00\u79cd\u4f18\u5316\u7248\u672c\u5c31\u662fDual Depth Peeling\uff0c\u4ece\u524d\u540e\u4e24\u4e2a\u65b9\u5411\u5265\u79bb\uff0c\u4e0d\u5728\u672c\u6b21\u8ba8\u8bba\u7684\u8303\u56f4\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u53c2\u8003\u94fe\u63a5\u8bba\u6587\u3002<\/p>\n

\u6df1\u5ea6\u5265\u79bb\u662f\u4e00\u79cd\u5bf9\u6df1\u5ea6\u503c\u8fdb\u884c\u6392\u5e8f\u7684\u6280\u672f\u3002\u5b83\u7684\u539f\u7406\u6bd4\u8f83\u76f4\u89c2\uff0c\u901a\u5e38\u7684\u6df1\u5ea6\u68c0\u6d4b\u662f\u5c06\u573a\u666f\u4e2d Z \u503c\u6700\u5c0f\u7684\u50cf\u7d20\u8f93\u51fa\u5230\u5c4f\u5e55\u4e0a\uff0c\u5c31\u662f\u91cc\u76f8\u673a\u6700\u8fd1\u7684\u50cf\u7d20\u3002\u5982\u6b64\u4e00\u6765\u5c31\u4e00\u5b9a\u6709\u79bb\u76f8\u673a\u7b2c\u4e8c\u8fd1\u7684\u70b9\uff0c\u7b2c\u4e09\u8fd1\u7684\u70b9\u00b7\u00b7\u00b7\u00b7\u00b7\u3002\u901a\u8fc7\u591a\u6b21\u6e32\u67d3\u7684\u65b9\u6cd5\uff0c\u7b2c\u4e00\u6b21\u6b63\u5e38\u6e32\u67d3\uff0c\u5c06\u6df1\u5ea6\u503c\u5b58\u5165\u7eb9\u7406\u5c31\u5f97\u5230\u6765\u79bb\u76f8\u673a\u6700\u8fd1\u50cf\u7d20\u7684\u6df1\u5ea6\u548c\u989c\u8272\u3002\u7b2c\u4e8c\u904d\u6e32\u67d3\u65f6\uff0c\u628a\u6bcf\u4e2a\u50cf\u7d20\u7684\u6df1\u5ea6\u4e0e\u4e0a\u6b21\u7684\u6df1\u5ea6\u503c\u505a\u6bd4\u8f83\uff0c\u51e1\u662f\u5c0f\u4e8e\u4e0a\u6b21\u6df1\u5ea6\u503c\u7684\u90fd\u901a\u8fc7\u6d4b\u8bd5\uff0c\u5728\u52a0\u4e0a FBO \u6df1\u5ea6\u6d4b\u8bd5\u7684\u6700\u5c0f\u503c\u529f\u80fd\u5c31\u80fd\u5f97\u5230\u4e0b\u4e00\u4e2a\u6700\u5c0f\u7684\u6df1\u5ea6\u503c\u4e0e\u989c\u8272\u503c\uff0c\u4ee5\u6b64\u7c7b\u63a8\u5373\u53ef\u3002<\/p>\n

\u7f3a\u70b9<\/strong><\/p>\n

\u9700\u8981\u5265\u79bb N \u6b21\u624d\u80fd\u5b8c\u6210\uff0c\u5c31\u9700\u8981 N \u4e2a Pass\uff0cN \u662f\u6df1\u5ea6\u590d\u6742\u5ea6\u3002\u56e0\u6b64\u6027\u80fd\u662f\u4e25\u91cd\u7684\u74f6\u9888\uff0c\u53e6\u5916\u5982\u4f55\u786e\u5b9a N \u4e5f\u662f\u4e2a\u95ee\u9898\u3002<\/p>\n

\u5177\u4f53\u6d41\u7a0b<\/strong><\/p>\n

1 \u3001\u521b\u5efa\u4e24\u5bf9\u989c\u8272\u7eb9\u7406\u548c\u4e24\u5bf9 GL_FLOAT \u7c7b\u578b\u7684\u6df1\u5ea6\u7eb9\u7406\u7528\u6765 pingpong \u3002<\/p>\n

2 \u3001clear \u6df1\u5ea6\u7eb9\u7406\u4e3a 0\uff0c\u5173\u95ed OpenGL \u6df7\u5408<\/p>\n

2 \u3001\u6b63\u5e38\u6e32\u67d3\uff0c\u5927\u4e8e\u6df1\u5ea6\u7eb9\u7406\u4e0a\u7684\u503c\u90fd\u53ef\u4ee5\u901a\u8fc7\u6d4b\u8bd5\uff0c\u52a0\u4e0a\u6df1\u5ea6\u7f13\u51b2\u6d4b\u8bd5\u7684\u6700\u5c0f\u6df1\u5ea6\u503c\u5c31\u53ef\u4ee5\u5f97\u5230\u79bb\u76f8\u673a\u6700\u8fd1\u7684\u6df1\u5ea6\u4e0e\u989c\u8272\u503c\u3002\u5c06\u989c\u8272\u7ed3\u679c\u4e0e\u989c\u8272\u7eb9\u7406\u4e2d\u7684\u989c\u8272\u505a\u6df7\u5408\uff0c\u6df1\u5ea6\u5199\u5165\u6df1\u5ea6\u7eb9\u7406\u3002<\/p>\n

3 \u3001\u4f7f\u7528\u4e0a\u6b21\u5f97\u5230\u7684\u989c\u8272\u4e0e\u6df1\u5ea6\u4f5c\u4e3a\u8f93\u5165\u7eb9\u7406\u91cd\u590d 2 \u7684\u64cd\u4f5c\uff0c\u76f4\u5230\u5265\u79bb\u5b8c\u6210\u3002<\/p>\n

\u5982\u4f55\u4ece\u524d\u5411\u540e\u6df7\u5408\u989c\u8272<\/strong><\/p>\n

\u4ece\u524d\u5411\u540e\u76f4\u63a5\u6df7\u5408\u660e\u663e\u662f\u9519\u8bef\u7684\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u6df7\u5408\u7b97\u6cd5\u63a8\u5bfc\u51fa\u53cd\u5411\u6df7\u5408\u7684\u7b97\u6cd5\uff0c\u5177\u4f53\u63a8\u5bfc\u53ef\u4ee5\u53c2\u8003 Dual Peth Peeling \u7684 paper \u3002\u5177\u4f53\u6df7\u5408\u7b97\u6cd5\u4e3a\uff1a<\/p>\n

glBlendEquation(GL_FUNC_ADD);  glBlendFuncSeparate(GL_DST_ALPHA, GL_ONE,  GL_ZERO, GL_ONE_MINUS_SRC_ALPHA); <\/code><\/pre>\n
\u5982\u4f55\u786e\u5b9a N<\/strong><\/p>\n
\u6211\u4eec\u65e0\u6cd5\u786e\u5b9a\u9700\u8981\u5265\u79bb\u591a\u5c11\u6b21\uff0c\u56e0\u4e3a\u4e0d\u540c\u7684\u6e32\u67d3\u76ee\u6807\u7684\u6df1\u5ea6\u590d\u6742\u5ea6\u662f\u4e0d\u540c\u7684\u3002\u76ee\u524d\u6765\u8bf4\u6700\u597d\u7684\u65b9\u6cd5\u662f\u91c7\u7528\u906e\u6321\u67e5\u8be2\u7684\u65b9\u5f0f\u6765\u68c0\u6d4b\u662f\u5426\u5265\u79bb\u5b8c\u6210\u3002\u4f46\u8fd9\u79cd\u65b9\u5f0f\u9700\u8981 GPU \u540c\u6b65\uff0c\u4e5f\u4f1a\u5e26\u6765\u4e25\u91cd\u7684\u6027\u80fd\u95ee\u9898\u3002\u65b9\u5f0f\u5982\u4e0b<\/p>\n
GLuint queryId; glBeginQuery(GL_SAMPLES_PASSED, queryId); \/\/depth peeling glEndQuery(GL_SAMPLES_PASSED); GLuint queryReady = GL_FALSE; glGetQueryObjectuiv(queryId, GL_QUERY_RESULT_AVAILABLE, &queryReady); GLuint samples = 0; glGetQueryObjectuiv(mOITQueryId, GL_QUERY_RESULT, &samples); <\/code><\/pre>\n
samples \u4e3a 0 \u65f6\u5c31\u5265\u79bb\u5b8c\u6210\u4e86\uff0c\u4e0d\u80fd 0 \u5219\u7ee7\u7eed\u5265\u79bb\u3002<\/p>\n
\u5b9e\u9645\u5e94\u7528\u4e2d\u503c\u5f97\u6ce8\u610f\u7684\u5730\u65b9<\/strong><\/p>\n
\u7531\u4e8e\u6df1\u5ea6\u7cbe\u5ea6\u95ee\u9898\u53ef\u80fd\u4f1a\u9020\u6210\u4ea4\u53c9\u7684\u5730\u65b9\u6709\u63a5\u7f1d\uff0c\u5177\u4f53\u505a\u6cd5\u5982\u4e0b\uff1a<\/p>\n
1 \u3001\u6df1\u5ea6\u7f13\u51b2\u53ca\u7eb9\u7406\u4f7f\u7528 GL_FLOAT \u7c7b\u578b\u589e\u52a0\u7cbe\u5ea6\u3002<\/p>\n
2 \u3001\u7eb9\u7406\u9700\u8981\u4f7f\u7528\u9ad8\u7cbe\u5ea6\u7684\u7eb9\u7406 precision highp sampler2D;<\/p>\n
3 \u3001\u79bb\u6444\u50cf\u673a\u8fc7\u4e8e\u4ecd\u7136\u4f1a\u7531\u4e8e\u7cbe\u5ea6\u4e0d\u8db3\u800c\u51fa\u73b0\u63a5\u7f1d\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u52a8\u6001\u8c03\u6574\u6444\u50cf\u673a\u8fdc\u8fd1\u5e73\u9762\u6765\u63d0\u5347\u7cbe\u5ea6<\/p>\n
4 \u3001\u4f18\u5316\u906e\u6321\u67e5\u8be2\u4e2d\u7684\u540c\u6b65\u64cd\u4f5c<\/p>\n
5 \u3001\u907f\u514d\u906e\u6321\u67e5\u8be2\u51fa\u73b0\u6b7b\u5faa\u73af<\/p>\n
\u4f18\u5316\u65b9\u5411<\/strong><\/p>\n
1 \u3001\u672c\u6587\u91c7\u7528\u4ece\u524d\u5411\u540e\u5265\u79bb\uff0c\u5728\u7ec6\u8282\u8981\u6c42\u4e0d\u9ad8\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u56fa\u5b9a N\uff0c\u5ffd\u7565\u540e\u7eed\u7684\u5265\u79bb\u5f71\u54cd\u4e0d\u5927\u3002<\/p>\n
2 \u3001\u4f7f\u7528 Dpeth Peeling \u7684\u4f18\u5316\u7248\u672c Dual Dpeth Peeling<\/p>\n
3 \u3001\u4f7f\u7528\u9ad8\u7248\u672c\u624d\u80fd\u652f\u6301\u7684 per pixel linked list \u65b9\u6cd5<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (0<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n","protected":false},"excerpt":{"rendered":"
    Single Depth peel…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/203070"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=203070"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/203070\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=203070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=203070"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=203070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}