diff --git a/share/twn_api.json b/share/twn_api.json
index 3559f98..bf4057d 100644
--- a/share/twn_api.json
+++ b/share/twn_api.json
@@ -251,6 +251,29 @@
             "restriction": "parameters"
         },
 
+        "draw_camera_unproject": {
+            "module": "draw",
+            "symbol": "camera_unproject",
+            "header": "twn_draw.h",
+            "params": [
+                { "name": "point", "type": "Vec2", "default": { "x": 0, "y": 0 } },
+                { "name": "position", "type": "Vec3", "default": { "x": 0, "y": 0, "z": 0 } },
+                { "name": "direction", "type": "Vec3", "default": { "x": 0, "y": 0, "z": -1 } },
+                { "name": "up", "type": "Vec3", "default": { "x": 0, "y": 1, "z": 0 } },
+                { "name": "fov", "type": "float", "default": 1.57079632679 },
+                { "name": "zoom", "type": "float", "default": 1 },
+                { "name": "draw_distance", "type": "float", "default": 100 }
+            ],
+            "return": {
+                "fields": [
+                    { "name": "position", "type": "Vec3" },
+                    { "name": "direction", "type": "Vec3" }
+                ],
+                "c_type": "DrawCameraUnprojectResult"
+            },
+            "restriction": "parameters"
+        },
+
         "draw_skybox": {
             "module": "draw",
             "symbol": "skybox",