{"topic":{"id":13747,"title":"实验 2.3 如何增加线程数量","slug":"topic","userId":3734,"categoryId":56,"createdAt":"2024-10-24 02:16:57.618507","bumpedAt":"2024-11-23 13:16:31.186889","views":265,"postsCount":3,"highestPostNumber":3,"likeCount":0,"closed":false,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"在图形界面中修改线程数量后似乎没有影响到渲染时间 (在没修过线程代码的情况下也没有发生文档中说的会出现的问题)。如果是修改 render_engine 文件中构造函数的参数，在没有修改线程函数的前提下，我尝试增加光栅化线程数量，虽然渲染时间发生变化，可是无论增加多少个，渲染时间的变化都是一样的，比如：渲染 cow 这种短时间的怎么增加都只减一半，而渲染 dragon 这种长时间的都只能减 2 秒 (这让我很疑惑)。所以如何增加线程数量呢…","deletedAt":null,"isAnonymous":false,"isPrivate":false,"isMembersOnly":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":3734,"username":"K-方块","name":"L","avatarUrl":null},"realAuthor":{"id":3734,"username":"K-方块","name":"L","avatarUrl":null},"tags":[]},"posts":[{"id":41999,"postNumber":1,"raw":"在图形界面中修改线程数量后似乎没有影响到渲染时间 (在没修过线程代码的情况下也没有发生文档中说的会出现的问题)。如果是修改 render_engine 文件中构造函数的参数，在没有修改线程函数的前提下，我尝试增加光栅化线程数量，虽然渲染时间发生变化，可是无论增加多少个，渲染时间的变化都是一样的，比如：渲染 cow 这种短时间的怎么增加都只减一半，而渲染 dragon 这种长时间的都只能减 2 秒 (这让我很疑惑)。所以如何增加线程数量呢，我没有在文档中看到关于增加线程数量的说明，而且文档提到的主要需要修改的部分仅在于三个线程函数、fragmentbuff 和 context","cooked":"

在图形界面中修改线程数量后似乎没有影响到渲染时间 (在没修过线程代码的情况下也没有发生文档中说的会出现的问题)。如果是修改 render_engine 文件中构造函数的参数，在没有修改线程函数的前提下，我尝试增加光栅化线程数量，虽然渲染时间发生变化，可是无论增加多少个，渲染时间的变化都是一样的，比如：渲染 cow 这种短时间的怎么增加都只减一半，而渲染 dragon 这种长时间的都只能减 2 秒 (这让我很疑惑)。所以如何增加线程数量呢，我没有在文档中看到关于增加线程数量的说明，而且文档提到的主要需要修改的部分仅在于三个线程函数、fragmentbuff 和 context

\n","createdAt":"2024-10-24 02:16:57.89732","updatedAt":"2024-11-28 07:35:03.150759","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":239,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":3734,"username":"K-方块","name":"L","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":43489,"postNumber":2,"raw":"有人知道解决办法吗","cooked":"

有人知道解决办法吗

\n","createdAt":"2024-11-22 16:54:38.776433","updatedAt":"2024-11-22 16:54:38.776433","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":9,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":2329,"username":"Arcw","name":"void face","avatarUrl":"/uploads/image/9c/c7/9cc78443c9741385f89b03dd23dd4a504f973932bedd05666ed18e83a959c8a4.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":43523,"postNumber":3,"raw":"// choose render type\nvoid RenderEngine::render(Scene& scene, RendererType type)\n{\n switch (type) {\n case RendererType::RASTERIZER: {\n rasterizer_render = std::make_unique(*this, n_threads, n_threads, n_threads);\n rasterizer_render->render(scene); break;}\n // case RendererType::RASTERIZER_MT: rasterizer_render->render_mt(scene); break;\n case RendererType::WHITTED_STYLE: whitted_render->render(scene); break;\n default: break;\n }\n}\n试试把 render_engine.cpp 文件中 RenderEngine::render 函数原来的 case 语句改成上面的代码\n多了一句 rasterizer_render = std::make_unique(*this, n_threads, n_threads, n_threads);","cooked":"

// choose render type
\nvoid RenderEngine::render(Scene& scene, RendererType type)
\n{
\nswitch (type) {
\ncase RendererType::RASTERIZER: {
\nrasterizer_render = std::make_unique(*this, n_threads, n_threads, n_threads);
\nrasterizer_render->render(scene); break;}
\n// case RendererType::RASTERIZER_MT: rasterizer_render->render_mt(scene); break;
\ncase RendererType::WHITTED_STYLE: whitted_render->render(scene); break;
\ndefault: break;
\n}
\n}
\n试试把 render_engine.cpp 文件中 RenderEngine::render 函数原来的 case 语句改成上面的代码
\n多了一句 rasterizer_render = std::make_unique(*this, n_threads, n_threads, n_threads);

\n","createdAt":"2024-11-23 13:10:15.766438","updatedAt":"2024-11-23 13:16:31.154271","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":70,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":2425,"username":"JaysonNew","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":3,"hasUrlPostNumber":true}