{"id":22455,"date":"2026-10-13T17:10:18","date_gmt":"2026-10-13T08:10:18","guid":{"rendered":"https:\/\/cg-method.com\/unity\/?p=22455"},"modified":"2026-10-13T17:10:18","modified_gmt":"2026-10-13T08:10:18","slug":"unity-physics-raycast-basics","status":"publish","type":"post","link":"https:\/\/cg-method.com\/unity\/unity-physics-raycast-basics\/","title":{"rendered":"Unity\u306eRaycast\u306e\u4f7f\u3044\u65b9\uff5c3D\u306e\u5f53\u305f\u308a\u5224\u5b9a\u3068\u5f53\u305f\u3089\u306a\u3044\u539f\u56e0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Unity\u306eRaycast\u306f\u3001\u3042\u308b\u4f4d\u7f6e\u304b\u3089\u7279\u5b9a\u306e\u65b9\u5411\u3078\u898b\u3048\u306a\u3044\u7dda\u3092\u98db\u3070\u3057\u3001Collider\u306b\u5f53\u305f\u308b\u304b\u3092\u8abf\u3079\u308b\u6a5f\u80fd\u3067\u3059\u3002\u524d\u65b9\u306e\u58c1\u3092\u8abf\u3079\u308b\u3001\u7167\u6e96\u306e\u5148\u306b\u3042\u308b\u7269\u3092\u5224\u5b9a\u3059\u308b\u3001\u3068\u3044\u3063\u305f\u51e6\u7406\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3D\u3067\u306fPhysics.Raycast\u30012D\u3067\u306fPhysics2D.Raycast\u3092\u4f7f\u3044\u307e\u3059\u3002\u898b\u305f\u76ee\u304c\u5e73\u9762\u7684\u306a\u30b2\u30fc\u30e0\u3067\u3082\u3001\u4f7f\u7528\u3057\u3066\u3044\u308bCollider\u304c3D\u7528\u306a\u3089Physics\u5074\u3067\u3059\u3002\u6700\u521d\u306b\u3001\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Raycast\u306b\u5fc5\u8981\u306a4\u3064\u306e\u60c5\u5831<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u60c5\u5831<\/th><th>\u610f\u5473<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>origin<\/td><td>\u7dda\u3092\u98db\u3070\u3059\u958b\u59cb\u4f4d\u7f6e<\/td><td>\u30ab\u30e1\u30e9\u3084\u30bb\u30f3\u30b5\u30fc\u306e\u4f4d\u7f6e<\/td><\/tr><tr><td>direction<\/td><td>\u7dda\u3092\u98db\u3070\u3059\u65b9\u5411<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u524d\u65b9<\/td><\/tr><tr><td>maxDistance<\/td><td>\u5224\u5b9a\u3059\u308b\u8ddd\u96e2<\/td><td>\u524d\u65b910\u5358\u4f4d<\/td><\/tr><tr><td>layerMask<\/td><td>\u5224\u5b9a\u5bfe\u8c61\u306e\u30ec\u30a4\u30e4\u30fc<\/td><td>\u58c1\u3084\u64cd\u4f5c\u3067\u304d\u308b\u7269\u3060\u3051<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">direction\u306b\u306f\u3001\u76ee\u7684\u5730\u306e\u30ef\u30fc\u30eb\u30c9\u5ea7\u6a19\u3092\u305d\u306e\u307e\u307e\u5165\u308c\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u958b\u59cb\u4f4d\u7f6e\u304b\u3089\u898b\u305f\u65b9\u5411\u3092\u6e21\u3057\u307e\u3059\u3002\u3042\u308b\u5730\u70b9\u3092\u72d9\u3046\u306a\u3089targetPosition &#8211; origin\u304b\u3089\u65b9\u5411\u3092\u6c42\u3081\u307e\u3059\u3002\u8ddd\u96e2\u3092\u6709\u9650\u306b\u3057\u3066\u304a\u304f\u3068\u3001\u60f3\u5b9a\u5916\u306e\u9060\u3044\u7269\u307e\u3067\u5224\u5b9a\u3059\u308b\u306e\u3092\u907f\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u524d\u65b9\u306eCollider\u3092\u8abf\u3079\u308b\u30b3\u30fc\u30c9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ForwardRayExample.cs\u3068\u3044\u3046\u540d\u524d\u3067\u4fdd\u5b58\u3057\u3001\u7a7a\u306eGameObject\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002Input System\u306b\u306f\u4f9d\u5b58\u3057\u306a\u3044\u4f8b\u3067\u3001\u518d\u751f\u4e2d\u306b\u524d\u65b9\u306e\u5224\u5b9a\u7d50\u679c\u3092Inspector\u3078\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using UnityEngine;\n\npublic class ForwardRayExample : MonoBehaviour\n{\n    [SerializeField] private float distance = 10f;\n    [SerializeField] private LayerMask targetLayers = Physics.DefaultRaycastLayers;\n    [SerializeField] private string hitObjectName;\n\n    private void Update()\n    {\n        Vector3 origin = transform.position;\n        Vector3 direction = transform.forward;\n        float length = Mathf.Max(0f, distance);\n        bool found = Physics.Raycast(\n            origin, direction, out RaycastHit hit, length,\n            targetLayers, QueryTriggerInteraction.Ignore);\n\n        hitObjectName = found ? hit.collider.name : &quot;\u306a\u3057&quot;;\n        float drawLength = found ? hit.distance : length;\n        Debug.DrawRay(origin, direction * drawLength,\n            found ? Color.green : Color.red);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Update\u3067\u8abf\u3079\u308b\u305f\u3073\u306bConsole\u3078\u30ed\u30b0\u3092\u51fa\u3059\u3068\u3001\u5224\u5b9a\u7d50\u679c\u304c\u5927\u91cf\u306b\u4e26\u3073\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001Hit Object Name\u306e\u8868\u793a\u3060\u3051\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002Debug.DrawRay\u306f\u78ba\u8a8d\u7528\u306e\u7dda\u3067\u3042\u308a\u3001\u88fd\u54c1\u5185\u306e\u30ec\u30fc\u30b6\u30fc\u8868\u73fe\u3092\u63cf\u753b\u3059\u308b\u6a5f\u80fd\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cube\u3092\u7f6e\u3044\u3066\u52d5\u4f5c\u3092\u78ba\u8a8d\u3059\u308b<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7a7a\u306eGameObject\u3092\u539f\u70b9\u306b\u7f6e\u304d\u3001\u56de\u8ee2\u30920\u306b\u3057\u307e\u3059\u3002<\/li>\n\n\n<li>Cube\u3092\u4f4d\u7f6e\uff080, 0, 5\uff09\u4ed8\u8fd1\u306b\u7f6e\u304d\u3001Box Collider\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/li>\n\n\n<li>\u7a7a\u306eGameObject\u3078\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u8ffd\u52a0\u3057\u3001Distance\u309210\u306b\u3057\u307e\u3059\u3002<\/li>\n\n\n<li>\u518d\u751f\u3057\u3066\u3001Hit Object Name\u306bCube\u306e\u540d\u524d\u304c\u51fa\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n\n\n<li>Scene\u30d3\u30e5\u30fc\u306eGizmos\u3092\u6709\u52b9\u306b\u3057\u3001\u7dda\u306e\u65b9\u5411\u3092\u898b\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b21\u306bCube\u3092\u6a2a\u3078\u79fb\u52d5\u3057\u3001\u5224\u5b9a\u304c\u300c\u306a\u3057\u300d\u3078\u5909\u308f\u308b\u304b\u3092\u78ba\u304b\u3081\u307e\u3059\u3002\u3055\u3089\u306bDistance\u30922\u306b\u3059\u308b\u3068\u3001\u524d\u65b95\u4ed8\u8fd1\u306eCube\u306b\u306f\u5c4a\u304b\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u65b9\u5411\u3001\u8ddd\u96e2\u3001Collider\u306e\u95a2\u4fc2\u30921\u3064\u305a\u3064\u5909\u3048\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u610f\u5473\u3092\u8ffd\u3044\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">LayerMask\u306f\u30ec\u30a4\u30e4\u30fc\u756a\u53f7\u305d\u306e\u3082\u306e\u3067\u306f\u306a\u3044<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5224\u5b9a\u5bfe\u8c61\u3092\u7d5e\u308b\u3068\u304d\u306f\u3001Inspector\u306eTarget Layers\u3067\u30ec\u30a4\u30e4\u30fc\u3092\u9078\u3073\u307e\u3059\u3002\u30b3\u30fc\u30c9\u3067\u6307\u5b9a\u3059\u308b\u306a\u3089LayerMask.GetMask(&#8220;\u540d\u524d&#8221;)\u306a\u3069\u3092\u4f7f\u3044\u307e\u3059\u3002\u30ec\u30a4\u30e4\u30fc\u756a\u53f7\u306e8\u3068\u30018\u756a\u30ec\u30a4\u30e4\u30fc\u3092\u8868\u3059\u30d3\u30c3\u30c8\u30de\u30b9\u30af\u306f\u540c\u3058\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u306fTrigger\u3092\u7121\u8996\u3059\u308b\u8a2d\u5b9a\u3067\u3059\u3002Trigger\u3078\u3082\u5f53\u3066\u305f\u3044\u306a\u3089\u3001QueryTriggerInteraction.Collide\u306a\u3069\u3001\u7528\u9014\u306b\u5408\u3046\u6307\u5b9a\u3078\u5909\u66f4\u3057\u307e\u3059\u3002\u57fa\u672c\u306e\u5f15\u6570\u3001\u8fd4\u308a\u5024\u3001Trigger\u306e\u6271\u3044\u306f<a href=\"https:\/\/docs.unity3d.com\/6000.0\/Documentation\/ScriptReference\/Physics.Raycast.html\">Unity 6\u306ePhysics.Raycast\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/a>\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5f53\u305f\u3089\u306a\u3044\u3068\u304d\u306b\u78ba\u8a8d\u3059\u308b\u9806\u756a<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mesh Renderer\u3060\u3051\u3067\u306a\u304f\u3001Collider\u304c\u4ed8\u3044\u3066\u3044\u308b\u304b\u3002<\/li>\n\n\n<li>Collider\u3068GameObject\u304c\u6709\u52b9\u304b\u3002<\/li>\n\n\n<li>2D\u7528\u30683D\u7528\u306e\u7269\u7406API\u3092\u6df7\u305c\u3066\u3044\u306a\u3044\u304b\u3002<\/li>\n\n\n<li>\u958b\u59cb\u4f4d\u7f6e\u3068\u524d\u65b9\u5411\u304c\u610f\u56f3\u3057\u305f\u4f4d\u7f6e\u30fb\u5411\u304d\u304b\u3002<\/li>\n\n\n<li>\u5224\u5b9a\u8ddd\u96e2\u3068LayerMask\u304c\u5bfe\u8c61\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3002<\/li>\n\n\n<li>Trigger\u3092\u7121\u8996\u3059\u308b\u8a2d\u5b9a\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u304b\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u958b\u59cb\u70b9\u304cCollider\u306e\u5185\u90e8\u306b\u3042\u308b\u5834\u5408\u3001\u305d\u306eCollider\u3092\u691c\u51fa\u3067\u304d\u306a\u3044\u30b1\u30fc\u30b9\u306b\u3082\u6ce8\u610f\u3057\u307e\u3059\u3002\u81ea\u5206\u81ea\u8eab\u306e\u4e2d\u5fc3\u304b\u3089\u7dda\u3092\u51fa\u3057\u3066\u5916\u6bbb\u3092\u8abf\u3079\u3088\u3046\u3068\u3059\u308b\u3088\u308a\u3001\u958b\u59cb\u4f4d\u7f6e\u3092\u5916\u3078\u7f6e\u304f\u304b\u3001\u76ee\u7684\u306b\u5408\u3046\u5225\u306e\u5224\u5b9a\u65b9\u6cd5\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7dda\u3067\u306f\u306a\u304f\u592a\u3055\u304c\u5fc5\u8981\u306a\u5224\u5b9a\u306f\u5225\u306b\u8003\u3048\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d30\u3044\u7dda1\u672c\u306e\u5224\u5b9a\u3067\u306f\u3001\u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u306e\u5e45\u3084\u8db3\u5143\u5168\u4f53\u3092\u8868\u73fe\u3067\u304d\u307e\u305b\u3093\u3002\u524d\u9032\u3067\u304d\u308b\u9699\u9593\u3092\u8abf\u3079\u305f\u3044\u306a\u3089\u3001SphereCast\u3084CapsuleCast\u306a\u3069\u3001\u5f62\u72b6\u3092\u6301\u3064\u5224\u5b9a\u304c\u9069\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305aRaycast\u3067\u4f4d\u7f6e\u30fb\u65b9\u5411\u30fb\u8ddd\u96e2\u3092\u7406\u89e3\u3057\u3001\u305d\u306e\u5f8c\u3067\u7528\u9014\u306b\u5408\u3046\u5f62\u3078\u5e83\u3052\u308b\u3068\u6574\u7406\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u4eca\u56de\u306e\u30b5\u30f3\u30d7\u30eb\u3082\u3001\u7269\u7406\u7684\u306b\u79fb\u52d5\u3092\u6b62\u3081\u308b\u51e6\u7406\u306f\u542b\u307e\u305a\u3001\u524d\u65b9\u306b\u4f55\u304c\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unity\u306ePhysics.Raycast\u3067\u524d\u65b9\u306eCollider\u3092\u8abf\u3079\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\u65b9\u5411\u30fb\u8ddd\u96e2\u30fbLayerMask\u30fbTrigger\u306e\u6307\u5b9a\u3001\u78ba\u8a8d\u7528\u30b3\u30fc\u30c9\u3001\u5f53\u305f\u3089\u306a\u3044\u3068\u304d\u306e\u5207\u308a\u5206\u3051\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":22454,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","book_review_data":"","footnotes":"","ssp_meta_title":"Unity\u306eRaycast\u306e\u4f7f\u3044\u65b9\uff5c3D\u306e\u5f53\u305f\u308a\u5224\u5b9a\u3068\u5f53\u305f\u3089\u306a\u3044\u539f\u56e0","ssp_meta_description":"Unity\u306ePhysics.Raycast\u3067\u524d\u65b9\u306eCollider\u3092\u8abf\u3079\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\u65b9\u5411\u30fb\u8ddd\u96e2\u30fbLayerMask\u30fbTrigger\u306e\u6307\u5b9a\u3001\u78ba\u8a8d\u7528\u30b3\u30fc\u30c9\u3001\u5f53\u305f\u3089\u306a\u3044\u3068\u304d\u306e\u5207\u308a\u5206\u3051\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002"},"categories":[25],"tags":[],"class_list":["post-22455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scripting"],"_links":{"self":[{"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/posts\/22455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/comments?post=22455"}],"version-history":[{"count":1,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/posts\/22455\/revisions"}],"predecessor-version":[{"id":22463,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/posts\/22455\/revisions\/22463"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/media\/22454"}],"wp:attachment":[{"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/media?parent=22455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/categories?post=22455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cg-method.com\/unity\/wp-json\/wp\/v2\/tags?post=22455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}