{"id":46993,"date":"2025-07-30T05:08:16","date_gmt":"2025-07-29T21:08:16","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/46993.html"},"modified":"2025-07-30T05:08:16","modified_gmt":"2025-07-29T21:08:16","slug":"vex%e5%ae%9e%e7%8e%b0pixel_sorted%e6%95%88%e6%9e%9c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/46993.html","title":{"rendered":"VEX\u5b9e\u73b0pixel_sorted\u6548\u679c"},"content":{"rendered":"

Sort\u51b3\u5b9a\u65b9\u5411：\u00a0<\/p>\n

\"\"<\/p>\n

UV：<\/p>\n

\"\"\"\"<\/p>\n

vector rel = relbbox(0,@P);
\nfloat x = rel.x;
\nfloat z = rel.z;<\/p>\n

int invertu = chi("invertu");
\nint invertv = chi("invertv");
\nfloat scaleu = chf("scaleu");
\nfloat scalev = chf("scalev");
\nfloat scale = chf("scale");<\/p>\n

if(invertu==1) x=1-x;
\nif(invertv==1) z=1-z;
\nx *= scaleu * scale;
\nz *= scalev * scale;<\/p>\n

@Cd = texture(chs("tex"),x,z);<\/p>\n

\u62c9\u4f38：\u00a0<\/p>\n

1.<\/p>\n

\"\"<\/p>\n

int length = chi("length");
\nfloat threshold = chf("threshold");
\nfloat brightness = 0.299 * @Cd.r + 0.587 * @Cd.g + 0.114 * @Cd.b;
\nint idx = @primnum;<\/p>\n

int seed = chi("seed");
\nvector mixcolor = prim(0,"Cd",idx+seed);
\nif(brightness>=threshold)
\n{
\n for(int i=0;i<length;++i)
\n {
\n if(inprimgroup(0,"border",idx+i)==1) break;
\n vector color = prim(0,"Cd",idx+i);
\n float ratio = i*1.0\/length;
\n color = lerp(@Cd,mixcolor,1-ratio);
\n setprimattrib(0,"Cd",idx+i,color);
\n }
\n}<\/p>\n

2.\u00a0<\/p>\n

1-ratio\u4f1a\u8ba9\u504f\u79fb\u7684\u6700\u540e\u4e00\u4e2a\u989c\u8272\u7b49\u4e8e\u62c9\u4f38\u7684\u989c\u8272;\u66ff\u6362\u6210ratio\u5219\u4f1a\u4f7f\u504f\u79fb\u7684\u7b2c\u4e00\u4e2a\u989c\u8272\u7b49\u4e8e\u62c9\u4f38\u7684\u989c\u8272\u3002<\/p>\n

\"\"<\/p>\n

int length = chi("length");
\nfloat threshold = chf("threshold");
\nfloat brightness = 0.299 * @Cd.r + 0.587 * @Cd.g + 0.114 * @Cd.b;
\nint idx = @primnum;<\/p>\n

int seed = chi("seed");
\nvector mixcolor = prim(0,"Cd",idx+seed);
\nif(brightness>=threshold)
\n{
\n for(int i=0;i<length;++i)
\n {
\n if(inprimgroup(0,"border",idx+i)==1) break;
\n float ratio = i*1.0\/length;
\n vector color = lerp(@Cd,mixcolor,ratio);
\n setprimattrib(0,"Cd",idx+i,color);
\n }
\n}<\/p>\n

3.<\/p>\n

\u4e0d\u4f7f\u7528mixcolor\u6df7\u5408，\u800c\u4f7f\u7528\u81ea\u5df1\u539f\u672c\u7684\u989c\u8272\u6df7\u5408，\u53ef\u4ee5\u4f7f\u5c3e\u90e8\u53d8\u67d4\u548c\u3002\u00a0<\/p>\n

\"\"<\/p>\n

int length = chi("length");
\nfloat threshold = chf("threshold");
\nfloat brightness = 0.299 * @Cd.r + 0.587 * @Cd.g + 0.114 * @Cd.b;
\nint idx = @primnum;<\/p>\n

int seed = chi("seed");
\nvector mixcolor = prim(0,"Cd",idx+seed);
\nif(brightness>=threshold)
\n{
\n for(int i=0;i<length;++i)
\n {
\n if(inprimgroup(0,"border",idx+i)==1) break;
\n vector col = prim(0,"Cd",idx+i);
\n float ratio = i*1.0\/length;
\n vector color = lerp(@Cd,col,ratio);
\n setprimattrib(0,"Cd",idx+i,color);
\n }
\n}<\/p>\n

4.<\/p>\n

\u5bf9ratio\u8fdb\u884c\u6620\u5c04\u3002<\/p>\n

\"\"<\/p>\n

int length = chi("length");
\nfloat threshold = chf("threshold");
\nfloat brightness = 0.299 * @Cd.r + 0.587 * @Cd.g + 0.114 * @Cd.b;
\nint idx = @primnum;<\/p>\n

int seed = chi("seed");
\nvector mixcolor = prim(0,"Cd",idx+seed);
\nif(brightness>=threshold)
\n{
\n for(int i=0;i<length;++i)
\n {
\n if(inprimgroup(0,"border",idx+i)==1) break;
\n vector col = prim(0,"Cd",idx+i);
\n float ratio = i*1.0\/length;
\n ratio = chramp("ratio",ratio);
\n vector color = lerp(@Cd,col,ratio);
\n setprimattrib(0,"Cd",idx+i,color);
\n }
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb505\u6b21\uff0c\u70b9\u8d5e20\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u4e24\u79cdHoudini VEX\u5904\u7406\u6280\u672f\uff1aUV\u65b9\u5411\u63a7\u5236\u548c\u989c\u8272\u62c9\u4f38\u6548\u679c\u3002UV\u5904\u7406\u90e8\u5206\u901a\u8fc7\u53c2\u6570\u8c03\u6574\u7eb9\u7406\u5750\u6807\u65b9\u5411\uff08invertu\/v\uff09\u548c\u7f29\u653e\u6bd4\u4f8b\uff08scaleu\/v\uff09\u3002\u989c\u8272\u62c9\u4f38\u90e8\u5206\u63d0\u4f9b\u4e86\u56db\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff1a1)\u57fa\u4e8e\u4eae\u5ea6\u9608\u503c\u5411\u540e\u5ef6\u4f38\u989c\u8272\uff1b2)\u8c03\u6574\u6df7\u5408\u65b9\u5411\uff1b3)\u4f7f\u7528\u539f\u8272\u6df7\u5408\u5b9e\u73b0\u67d4\u548c\u8fc7\u6e21\uff1b4)\u901a\u8fc7ramp\u63a7\u5236\u6df7\u5408\u6bd4\u4f8b\u3002\u5173\u952e\u53c2\u6570\u5305\u62ec\u62c9\u4f38\u957f\u5ea6(length)\u3001\u4eae\u5ea6\u9608\u503c(threshold)\u548c\u968f\u673a\u79cd\u5b50(seed)\uff0c\u901a\u8fc7lerp\u51fd\u6570\u5b9e\u73b0\u989c\u8272\u63d2\u503c\uff0c\u5e76\u652f\u6301\u8fb9\u754c\u68c0\u6d4b\u9632\u6b62\u8d8a\u754c\u3002<\/p>\n","protected":false},"author":2,"featured_media":46966,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4481,4482],"topic":[],"class_list":["post-46993","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-vex","tag-houdini"],"yoast_head":"\nVEX\u5b9e\u73b0pixel_sorted\u6548\u679c - 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