{"id":6444,"date":"2020-05-29T12:00:53","date_gmt":"2020-05-29T03:00:53","guid":{"rendered":"https:\/\/virtualcast.jp\/blog\/?p=6444"},"modified":"2024-10-23T15:28:14","modified_gmt":"2024-10-23T06:28:14","slug":"shadergraph_raymarching","status":"publish","type":"post","link":"https:\/\/blog.virtualcast.jp\/blog\/2020\/05\/shadergraph_raymarching\/","title":{"rendered":"URP+ShaderGraph\u3067\u3082\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u304c\u3057\u305f\u3044\uff01"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u3053\u3093\u306b\u3061\u306f\u3002\u30d0\u30fc\u30c1\u30e3\u30eb\u30ad\u30e3\u30b9\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u958b\u767a\u306enotargs(\u306e\u305f\u3050\u3059)\u3067\u3059\u3002<br \/>\n\u65e9\u901f\u3067\u3059\u304c\u3001\u307f\u306a\u3055\u3093\u306f<code>\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0<\/code>\u3068\u3044\u3046\u8a00\u8449\u3092\u805e\u3044\u305f\u3053\u3068\u306f\u3042\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p><code>\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0<\/code>\u306f\u3001\u5404\u30d4\u30af\u30bb\u30eb\u3054\u3068\u306b\u30ec\u30a4\u3092\u98db\u3070\u3057\u3001\u5168\u3066\u306e\u30ec\u30a4\u3092\u5c11\u3057\u305a\u3064\u9032\u3081\u3066\u3044\u304f\u3053\u3068\u3067\u7269\u4f53\u3092\u63cf\u753b\u3059\u308b\u6280\u8853\u306e\u7dcf\u79f0\u3067\u3059\u3002<br \/>\n\u6b21\u306e\u753b\u50cf\u306e\u3088\u3046\u306a\u30d5\u30e9\u30af\u30bf\u30eb\u3084\u96f2\u306a\u3069\u3001\u30dd\u30ea\u30b4\u30f3\u3067\u30e2\u30c7\u30ea\u30f3\u30b0\u3059\u308b\u306e\u304c\u96e3\u3057\u3044\u7269\u4f53\u306e\u63cf\u753b\u306b\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture.gif\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture.gif\" alt=\"\" \/><\/a><br \/>\n\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<code>URP(Universal Render Pipeline)<\/code>\u3068<code>ShaderGraph<\/code>\u3092\u4f7f\u3063\u3066\u3001\u3067\u304d\u308b\u3060\u3051\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u305a\u306b\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u3092\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8abf\u67fb\u3057\u3066\u307f\u307e\u3057\u305f\uff01<\/p>\n<h2>\u7403\u3092\u63cf\u753b\u3057\u3066\u307f\u308b<\/h2>\n<p>\u4eca\u56de\u306f\u30e9\u30a4\u30c6\u30a3\u30f3\u30b0\u3092\u81ea\u524d\u3067\u884c\u3044\u305f\u3044\u306e\u3067\u3001Unlit Graph\u3092\u9078\u3093\u3067\u304a\u304d\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-6.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-6.png\" alt=\"\" \/><\/a><\/p>\n<h3>\u30ec\u30a4\u3092\u5b9a\u7fa9\u3059\u308b<\/h3>\n<p>\u307e\u305a\u306f\u3001ShaderGraph\u4e0a\u3067\u30ec\u30a4\u306e\u8d77\u70b9\u3068\u30ec\u30a4\u306e\u65b9\u5411\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<br \/>\n\u30ab\u30e1\u30e9\u306e\u4f4d\u7f6e\u3092\u8d77\u70b9\u306b\u3001\u7269\u4f53\u306e\u4eca\u63cf\u753b\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u5ea7\u6a19\u3078\u30ec\u30a4\u3092\u98db\u3070\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-4.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-4.png\" alt=\"\" \/><\/a><\/p>\n<h4>\u30ec\u30a4\u306e\u4f4d\u7f6e\u3092\u6c7a\u3081\u308b\u30ce\u30fc\u30c9<\/h4>\n<p><code>Camera\u30ce\u30fc\u30c9<\/code>\u3068<code>Transform\u30ce\u30fc\u30c9<\/code>\u3092\u4f7f\u3063\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7a7a\u9593\u5185\u3067\u306e\u30ab\u30e1\u30e9\u4f4d\u7f6e\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e.png\" alt=\"\" \/><\/a><\/p>\n<h3>\u30ec\u30a4\u306e\u65b9\u5411\u3092\u6c7a\u3081\u308b\u30ce\u30fc\u30c9<\/h3>\n<p><code>Position\u30ce\u30fc\u30c9<\/code>\u3068<code>Camera\u30ce\u30fc\u30c9<\/code>\u306e\u5dee\u5206\u3092\u6c42\u3081\u3066\u6b63\u898f\u5316\u3057\u3001\u30ab\u30e1\u30e9\u304b\u3089\u63cf\u753b\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u4f4d\u7f6e\u307e\u3067\u306e\u5411\u304d\u3092\u6c42\u3081\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-1.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-1.png\" alt=\"\" \/><\/a><\/p>\n<h3>\u30de\u30fc\u30c1\u30f3\u30b0\u30eb\u30fc\u30d7<\/h3>\n<p>\u7d9a\u3044\u3066\u3001\u5b9f\u969b\u306b\u30ec\u30a4\u3092\u5c11\u3057\u305a\u3064\u9032\u3081\u3066\u3044\u304d\u3001\u885d\u7a81\u5224\u5b9a\u3092\u884c\u3046\u51e6\u7406\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\nShaderGraph\u3067\u306f\u30eb\u30fc\u30d7\u304c\u66f8\u3051\u306a\u3044\u305f\u3081\u3001\u3053\u3053\u3060\u3051\u306f\u30b3\u30fc\u30c9\u3067\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306a<code>Custom Function\u30ce\u30fc\u30c9<\/code>\u3092\u7528\u610f\u3057\u3001Type\u306b\u306f<code>File<\/code>\u3092\u6307\u5b9a\u3057\u3066\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-3.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-3.png\" alt=\"\" \/><\/a><\/p>\n<h4>RayMarching.hlsl<\/h4>\n<pre><code class=\"language-c\">\/\/ \u4f4d\u7f6e\u3092\u53d7\u3051\u53d6\u308a\u3001\u7269\u4f53\u307e\u3067\u306e\u8ddd\u96e2\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\n\/\/ \u8cea\u70b9\u306e\u8ddd\u96e2\u95a2\u6570 `length(p)` \u304b\u3089\u534a\u5f84\u3092\u5f15\u304f\u3068\u3001\u7403\u306e\u8ddd\u96e2\u95a2\u6570\u304c\u5b9a\u7fa9\u3067\u304d\u308b\nfloat Dist(float3 p)\n{\n    return length(p) - 0.5;\n}\n\n\/\/ \u6cd5\u7dda\u3092\u8a08\u7b97\u3059\u308b\nfloat3 CalcNormal(float3 p)\n{\n    \/\/ \u8ddd\u96e2\u95a2\u6570\u306e\u52fe\u914d\u3092\u53d6\u3063\u3066\u6b63\u898f\u5316\u3059\u308b\u3068\u6cd5\u7dda\u304c\u8a08\u7b97\u3067\u304d\u308b\n    float2 ep = float2(0, 0.001);\n    return normalize(\n        float3(\n            Dist(p + ep.yxx) - Dist(p),\n            Dist(p + ep.xyx) - Dist(p),\n            Dist(p + ep.xxy) - Dist(p)\n        )\n    );\n}\n\n\/\/ \u30de\u30fc\u30c1\u30f3\u30b0\u30eb\u30fc\u30d7\u306e\u672c\u4f53\nvoid RayMarching_float(\n    float3 RayPosition,\n    float3 RayDirection,\n    out bool Hit,\n    out float3 HitPosition,\n    out float3 HitNormal)\n{\n    float3 pos = RayPosition;\n\n    \/\/ \u5404\u30d4\u30af\u30bb\u30eb\u3054\u3068\u306b64\u56de\u306e\u30eb\u30fc\u30d7\u3092\u307e\u308f\u3059\n    for (int i = 0; i &lt; 64; ++i)\n    {\n        \/\/ \u8ddd\u96e2\u95a2\u6570\u306e\u5206\u3060\u3051\u30ec\u30a4\u3092\u9032\u3081\u308b\n        float d = Dist(pos);\n        pos += d * RayDirection;\n\n        \/\/ \u8ddd\u96e2\u95a2\u6570\u304c\u3042\u308b\u7a0b\u5ea6\u5c0f\u3055\u3051\u308c\u3070\u885d\u7a81\u3057\u3066\u3044\u308b\u3068\u898b\u306a\u3059\n        if (d &lt; 0.001)\n        {\n            Hit = true;\n            HitPosition = pos;\n            HitNormal = CalcNormal(pos);\n            return;\n        }\n    }\n}<\/code><\/pre>\n<p><code>Ray Position\u30d4\u30f3<\/code>\u3068<code>Ray Direction\u30d4\u30f3<\/code>\u306b\u5148\u307b\u3069\u8a08\u7b97\u3057\u305f\u30ec\u30a4\u306e\u539f\u70b9\u3068\u5411\u304d\u3092\u523a\u3057\u3066\u304a\u304d\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-10.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-10.png\" alt=\"\" \/><\/a><\/p>\n<h3>Unlit Master\u30ce\u30fc\u30c9\u306b\u3064\u306a\u3050<\/h3>\n<p>Branch\u30ce\u30fc\u30c9\u3092\u4f7f\u3044\u3001\u7269\u4f53\u3068\u885d\u7a81\u3057\u3066\u3044\u308c\u30701\u3001\u885d\u7a81\u3057\u3066\u3044\u306a\u3051\u308c\u30700\u3092<code>Unlit Master\u30ce\u30fc\u30c9<\/code>\u306e<code>Alpha<\/code>\u30d4\u30f3\u306b\u6d41\u3057\u8fbc\u307f\u307e\u3059\u3002<br \/>\n<code>Unlit Master\u30ce\u30fc\u30c9<\/code>\u306e<code>Surface<\/code>\u3092<code>Transparent<\/code>\u3001<code>Blend<\/code>\u3092<code>Alpha<\/code>\u3001<code>Two Sided<\/code>\u3092\u6709\u52b9\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-11.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-11.png\" alt=\"\" \/><\/a><\/p>\n<h3>\u7269\u4f53\u306b\u30a2\u30bf\u30c3\u30c1\u3057\u3066\u307f\u308b<\/h3>\n<p>\u3053\u3053\u307e\u3067\u3067\u4f5c\u3063\u305f\u30b7\u30a7\u30fc\u30c0\u30fc\u306e\u30de\u30c6\u30ea\u30a2\u30eb\u3092\u4f5c\u308a\u3001<code>GameObject\/3D Object\/Cube<\/code>\u304b\u3089\u4f5c\u3063\u305f<code>Cube<\/code>\u306b\u30a2\u30bf\u30c3\u30c1\u3057\u3066\u307f\u307e\u3059\u3002<br \/>\n\u3088\u3046\u3084\u304f\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u3067\u7403\u304c\u63cf\u753b\u3067\u304d\u307e\u3057\u305f\uff01<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-1.gif\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-1.gif\" alt=\"\" \/><\/a><\/p>\n<h2>\u30e9\u30a4\u30c6\u30a3\u30f3\u30b0\u3057\u3066\u307f\u308b<\/h2>\n<p>\u7d9a\u3044\u3066\u3001\u3053\u306e\u63cf\u753b\u3057\u305f\u7403\u3092\u30e9\u30a4\u30c6\u30a3\u30f3\u30b0\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<h3>\u30e9\u30a4\u30c8\u306e\u60c5\u5831\u3092\u53d6\u3063\u3066\u304f\u308b<\/h3>\n<p>\u30e9\u30a4\u30c8\u306e\u60c5\u5831\u3092\u53d6\u3063\u3066\u304f\u308b\u305f\u3081\u306e\u30ce\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<br \/>\n<code>Custom Function\u30ce\u30fc\u30c9<\/code>\u3092\u4f5c\u6210\u3057\u3001\u6b21\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092Body\u306b\u5165\u529b\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-12.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-12.png\" alt=\"\" \/><\/a><\/p>\n<pre><code class=\"language-c\">#if SHADERGRAPH_PREVIEW\n    Direction = half3(0.5, 0.5, 0);\n    Color = 1;\n#else\n    Light light = GetMainLight();\n    Direction = light.direction;\n    Color = light.color;\n#endif<\/code><\/pre>\n<h3>Lambert\u3067\u30e9\u30a4\u30c6\u30a3\u30f3\u30b0\u3059\u308b<\/h3>\n<p>RayMarching\u3067\u8a08\u7b97\u3057\u305f\u6cd5\u7dda\u306f\u3001<code>Transform\u30ce\u30fc\u30c9<\/code>\u3067<code>World\u7a7a\u9593<\/code>\u306b\u5909\u5f62\u3057\u3066\u304a\u304d\u307e\u3059\u3002<br \/>\n<code>Type<\/code>\u306b<code>Direction<\/code>\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u3092\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-15.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-15.png\" alt=\"\" \/><\/a><\/p>\n<p>\u6cd5\u7dda\u3068\u30e9\u30a4\u30c8\u306e\u5411\u304d\u306eDot\u3092\u53d6\u308b\u3053\u3068\u3067\u3001\u5149\u304c\u3069\u306e\u7a0b\u5ea6\u5f53\u305f\u3063\u3066\u3044\u308b\u304b\u304c\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<br \/>\n<code>Maximum\u30ce\u30fc\u30c9<\/code>\u30670\u4ee5\u4e0b\u306e\u5024\u3092\u5207\u308a\u843d\u3068\u3057\u3001\u30e9\u30a4\u30c8\u306e\u8272\u3068\u639b\u3051\u5408\u308f\u305b\u3066<code>Unlit Master\u30ce\u30fc\u30c9<\/code>\u306e<code>Color\u30d4\u30f3<\/code>\u306b\u7e4b\u3052\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-14.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-14.png\" alt=\"\" \/><\/a><\/p>\n<p>\u30e9\u30a4\u30c8\u304c\u53cd\u6620\u3067\u304d\u307e\u3057\u305f\uff01<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-2.gif\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-2.gif\" alt=\"\" \/><\/a><\/p>\n<p>\u5c11\u3057\u5f71\u304c\u5f37\u3059\u304e\u308b\u306e\u3067\u3001<code>Ambient\u30ce\u30fc\u30c9<\/code>\u306e\u51fa\u529b\u3092\u8db3\u3057\u5408\u308f\u305b\u3066\u3042\u3052\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-16.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-16.png\" alt=\"\" \/><\/a><br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-17.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-17.png\" alt=\"\" \/><\/a><\/p>\n<h2>\u4ed6\u306e\u7269\u4f53\u3068\u306e\u885d\u7a81\u5224\u5b9a\u3092\u884c\u3046<\/h2>\n<p>Cube\u3092\u5207\u308a\u629c\u3044\u3066\u3044\u308b\u305f\u3081\u3001\u4ed6\u306e\u7269\u4f53\u3068\u885d\u7a81\u3057\u3066\u3044\u308b\u3068\u304d\u306bCube\u306e\u5f62\u304c\u305d\u306e\u307e\u307e\u51fa\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3053\u3061\u3089\u306fZTest\u3092\u81ea\u524d\u3067\u884c\u3046\u3053\u3068\u3067\u5c11\u3057\u6539\u5584\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-18.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-18.png\" alt=\"\" \/><\/a><\/p>\n<h3>SceneDepth\u3092\u8a08\u7b97\u3059\u308b<\/h3>\n<p><code>Linear 01<\/code>\u306e<code>SceneDepth\u30ce\u30fc\u30c9<\/code>\u306b<code>Camera\u30ce\u30fc\u30c9<\/code>\u306e<code>Far Plane(1)<\/code>\u3092\u639b\u3051\u3001\u30b7\u30fc\u30f3\u306b\u3059\u3067\u306b\u63cf\u753b\u3055\u308c\u3066\u3044\u308b\u30d4\u30af\u30bb\u30eb\u306e\u5965\u884c\u304d\u3092\u8a08\u7b97\u3057\u3066\u304a\u304d\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-20.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-20.png\" alt=\"\" \/><\/a><\/p>\n<p>\u540c\u69d8\u306b\u3001\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u306e\u623b\u308a\u5024\u306e<code>Hit Position<\/code>\u304b\u3089\u3001\u885d\u7a81\u4f4d\u7f6e\u306e\u5965\u884c\u304d\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-22.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-22.png\" alt=\"\" \/><\/a><\/p>\n<h3>Alpha\u306e\u8a08\u7b97\u306b\u3064\u306a\u304e\u3053\u3080<\/h3>\n<p>\u30b7\u30fc\u30f3\u306e\u5965\u884c\u304d\u3068\u885d\u7a81\u4f4d\u7f6e\u306e\u5965\u884c\u304d\u3092\u6bd4\u8f03\u3057\u3001Hit\u304b\u3089Alpha\u3092\u8a08\u7b97\u3057\u3066\u3044\u308b\u51e6\u7406\u306b\u3064\u306a\u304e\u8fbc\u3093\u3067\u3042\u3052\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-21.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-21.png\" alt=\"\" \/><\/a><\/p>\n<p>\u7269\u4f53\u304c\u6b63\u3057\u304f\u7403\u306e\u5f62\u3067\u5207\u308a\u629c\u304b\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\uff01<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-23.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-23.png\" alt=\"\" \/><\/a><\/p>\n<h2>\u30d5\u30e9\u30af\u30bf\u30eb\u3092\u63cf\u753b\u3059\u308b<\/h2>\n<p>\u6b21\u306egif\u306e\u3088\u3046\u306b\u63cf\u304b\u308c\u308b\u30d5\u30e9\u30af\u30bf\u30eb\u3092\u3001\u300c\u53cd\u5fa9\u95a2\u6570\u7cfb(Iterated function system\u3001IFS)\u300d\u3068\u547c\u3073\u307e\u3059\u3002<br \/>\nWikipedia: <a href=\"https:\/\/ja.wikipedia.org\/wiki\/%E5%8F%8D%E5%BE%A9%E9%96%A2%E6%95%B0%E7%B3%BB\">https:\/\/ja.wikipedia.org\/wiki\/%E5%8F%8D%E5%BE%A9%E9%96%A2%E6%95%B0%E7%B3%BB<\/a><\/p>\n<p><a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-3.gif\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-3.gif\" alt=\"\" \/><\/a><\/p>\n<p>\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u3092\u4f7f\u3063\u3066\u3053\u308c\u3092\u63cf\u753b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30d5\u30e9\u30af\u30bf\u30eb\u306e\u8ddd\u96e2\u95a2\u6570\u3092\u66f8\u304f<\/h3>\n<p>Dist\u95a2\u6570\u3092\u6b21\u306e\u3088\u3046\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-c\">\/\/ \u4f4d\u7f6e\u3092\u53d7\u3051\u53d6\u308a\u3001\u7269\u4f53\u307e\u3067\u306e\u8ddd\u96e2\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\nfloat Dist(float3 p)\n{\n    \/\/ \u53cd\u5fa9\u95a2\u6570\u7cfb\u3067\u9069\u5f53\u306a\u30d5\u30e9\u30af\u30bf\u30eb\u3092\u63cf\u753b\u3057\u3066\u307f\u308b\n    float scale = 1.0;\n\n    \/\/ \u9069\u5f53\u306a\u56de\u6570\u7e70\u308a\u8fd4\u3057\u3066\u7a7a\u9593\u3092\u6298\u308a\u305f\u305f\u3080\n    for (int i = 0; i &lt; 12; ++i)\n    {\n        \/\/ \u5de6\u53f3\u4e0a\u4e0b\u524d\u5f8c\u3092\u305d\u308c\u305e\u308c\u5bfe\u79f0\u5316\u3059\u308b\n        p = abs(p);\n\n        \/\/ 45\u5ea6\u306e\u5e73\u9762\u3067\u533a\u5207\u3063\u3066\u5bfe\u79f0\u5316\u3059\u308b\n        if (p.x &gt; p.y) p.xy = p.yx;\n        if (p.x &gt; p.z) p.xz = p.zx;\n        if (p.z &gt; p.y) p.zy = p.yz;\n\n        \/\/ \u6642\u9593\u3092\u4f7f\u3063\u3066\u9069\u5f53\u306b\u4f4d\u7f6e\u3092\u30ba\u30e9\u3059\n        p -= float3(0.1, 0.2, 0.15) + sin(float3(0, 1, 2) + _Time.y * float3(4, 3, 2.5) + i) * 0.05;\n\n        \/\/ \u7a7a\u9593\u3092\u7e2e\u5c0f\u3057\u3066\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u306b\u9032\u3080\n        scale *= 2.0;\n        p *= 2.0;\n    }\n\n    \/\/ \u6298\u308a\u305f\u305f\u307e\u308c\u305f\u7a7a\u9593\u306e\u4e2d\u3067\u3001\u7403\u3092\u63cf\u753b\u3059\u308b\n    return (length(p) - 0.3) \/ scale;\n}<\/code><\/pre>\n<p>\u30d5\u30e9\u30af\u30bf\u30eb\u304c\u63cf\u753b\u3067\u304d\u307e\u3057\u305f\uff01<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-4.gif\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/capture-4.gif\" alt=\"\" \/><\/a><\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3053\u3053\u307e\u3067\u306e\u30b0\u30e9\u30d5\u306e\u5168\u4f53\u50cf\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002<br \/>\n<a href=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-25.png\"><img src=\"https:\/\/virtualcast.jp\/blog\/wp-content\/uploads\/2020\/05\/0d40a5e4a645fc6b96e767d64ac0878e-25.png\" alt=\"\" \/><\/a><\/p>\n<p>ShaderGraph\u3067\u3082\u304c\u3093\u3070\u308c\u3070\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u304c\u3067\u304d\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\uff01<br \/>\n\u51e6\u7406\u304c\u91cd\u3059\u304e\u308b\u305f\u3081\u4f7f\u3044\u6240\u306f\u304b\u306a\u308a\u96e3\u3057\u3044\u3067\u3059\u304c\u3001\u4f8b\u3048\u3070\u7570\u4e16\u754c\u611f\u306e\u8868\u73fe\u306a\u3069\u3001\u30b2\u30fc\u30e0\u5185\u306e\u30ef\u30f3\u30dd\u30a4\u30f3\u30c8\u3068\u3057\u3066\u6d3b\u7528\u3057\u3066\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u3053\u3093\u306b\u3061\u306f\u3002\u30d0\u30fc\u30c1\u30e3\u30eb\u30ad\u30e3\u30b9\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u958b\u767a\u306enotargs(\u306e\u305f\u3050\u3059)\u3067\u3059\u3002 \u65e9\u901f\u3067\u3059\u304c\u3001\u307f\u306a\u3055\u3093\u306f\u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u3068\u3044\u3046\u8a00\u8449\u3092\u805e\u3044\u305f\u3053\u3068\u306f\u3042\u308b\u3067\u3057\u3087\u3046\u304b\uff1f \u30ec\u30a4\u30de\u30fc\u30c1\u30f3\u30b0\u306f\u3001\u5404\u30d4\u30af\u30bb\u30eb\u3054\u3068\u306b\u30ec\u30a4\u3092\u98db\u3070\u3057\u3001\u5168\u3066\u306e...<\/p>\n","protected":false},"author":16,"featured_media":6586,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[25,26],"tags":[23],"_links":{"self":[{"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/posts\/6444"}],"collection":[{"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/comments?post=6444"}],"version-history":[{"count":25,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/posts\/6444\/revisions"}],"predecessor-version":[{"id":6622,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/posts\/6444\/revisions\/6622"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/media\/6586"}],"wp:attachment":[{"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/media?parent=6444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/categories?post=6444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.virtualcast.jp\/blog\/wp-json\/wp\/v2\/tags?post=6444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}