diff --git a/konabot/plugins/marchtoy/__init__.py b/konabot/plugins/marchtoy/__init__.py
index 903b226..104f611 100644
--- a/konabot/plugins/marchtoy/__init__.py
+++ b/konabot/plugins/marchtoy/__init__.py
@@ -8,8 +8,11 @@ cmd_marchtoy = on_command("march")
 @cmd_marchtoy.handle()
 async def _(args: Message = CommandArg()):
     if cmd := args.extract_plain_text():
-        img = await render.render(cmd, (256, 256))     
-        buffer = io.BytesIO()
-        img.save(buffer, format="PNG")
-        buffer.seek(0)
-        await cmd_marchtoy.send(await UniMessage().image(raw=buffer).export())
\ No newline at end of file
+        try:
+            img = await render.render(cmd, (256, 256))     
+            buffer = io.BytesIO()
+            img.save(buffer, format="PNG")
+            buffer.seek(0)
+            await cmd_marchtoy.send(await UniMessage().image(raw=buffer).export())
+        except Exception as e:
+            await cmd_marchtoy.send(await Message(message=f"发生了错误: {e}"))
\ No newline at end of file
diff --git a/konabot/plugins/marchtoy/obj.py b/konabot/plugins/marchtoy/obj.py
index ceabaf6..cc6217a 100644
--- a/konabot/plugins/marchtoy/obj.py
+++ b/konabot/plugins/marchtoy/obj.py
@@ -113,6 +113,55 @@ class Sphere(Object):
         return f"sdSphere({self.transform.p_expr()}, {self.radius})"
 
 
+@make_obj("cylinder", "cyl")
+class Cylinder(Object):
+    def __init__(self, _radius: float = 1.0, _height: float = 1.0) -> None:
+        super().__init__()
+        self.radius = _radius
+        self.height = _height
+
+    def parse_args(self, args: list[str]):
+        param = ArgParser.as_vec2(args)
+        self.radius = param[0]
+        self.height = param[1]
+
+    def sdf_block(self) -> str:
+        return f"sdCappedCylinder({self.transform.p_expr()}, {self.radius}, {self.height})"
+
+
+
+@make_obj("torus")
+class Torus(Object):
+    def __init__(self, _r1: float = 0.5, _r2: float = 1.0) -> None:
+        super().__init__()
+        self.r1 = _r1
+        self.r2 = _r2
+
+    def parse_args(self, args: list[str]):
+        param = ArgParser.as_vec2(args)
+        self.r1 = param[0]
+        self.r2 = param[1]
+
+    def sdf_block(self) -> str:
+        return f"sdTorus({self.transform.p_expr()}, vec2({self.r1}, {self.r2}))"
+
+@make_obj("capsule", "pill")
+class Capsule(Object):
+    def __init__(self, _h: float = 1.0, _r: float = 0.25) -> None:
+        super().__init__()
+        self._h = _h
+        self._r = _r
+
+    def parse_args(self, args: list[str]):
+        param = ArgParser.as_vec2(args)
+        self._h = param[0]
+        self._r = param[1]
+
+    def sdf_block(self) -> str:
+        return f"sdVerticalCapsule({self.transform.p_expr()}, {self._h}, {self._r})"
+
+
+
 @make_obj("camera", "cam")
 class Camera(Object):
     def __init__(self, _focus: float = 1.0) -> None:
diff --git a/konabot/plugins/marchtoy/shaders/frag.glsl b/konabot/plugins/marchtoy/shaders/frag.glsl
index 4bc65e8..5dd62b0 100644
--- a/konabot/plugins/marchtoy/shaders/frag.glsl
+++ b/konabot/plugins/marchtoy/shaders/frag.glsl
@@ -25,6 +25,23 @@ float sdSphere(vec3 p, float r) {
     return length(p) - r;
 }
 
+float sdCappedCylinder( vec3 p, float r, float h )
+{
+    vec2 d = abs(vec2(length(p.xz),p.y)) - vec2(r,h);
+    return min(max(d.x,d.y),0.0) + length(max(d,0.0));
+}
+
+float sdVerticalCapsule( vec3 p, float h, float r )
+{
+    p.y -= clamp( p.y, 0.0, h );
+    return length( p ) - r;
+}
+float sdTorus( vec3 p, vec2 t )
+{
+    vec2 q = vec2(length(p.xz)-t.x,p.y);
+    return length(q)-t.y;
+}
+
 sdQuery sd(vec3 p) {
     sdQuery qry;
     qry.value = 100000000.0;
diff --git a/konabot/plugins/marchtoy/utilities.py b/konabot/plugins/marchtoy/utilities.py
index 0806c75..7ff1b7e 100644
--- a/konabot/plugins/marchtoy/utilities.py
+++ b/konabot/plugins/marchtoy/utilities.py
@@ -36,6 +36,22 @@ class ArgParser:
             raise Exception(f"cannot parse {args}")
         return default
 
+    @staticmethod
+    def as_vec2(
+        args: list[str], default: np.ndarray = np.array((0.0, 0.0))
+    ) -> np.ndarray:
+        try:
+            if len(args) == 1:
+                x = float(args[0])
+                return np.array((x, x))
+            elif len(args) == 2:
+                x = float(args[0])
+                y = float(args[1])
+                return np.array((x, y))
+        except:
+            raise Exception(f"cannot parse {args}")
+        return default
+
     @staticmethod
     def as_vec3(
         args: list[str], default: np.ndarray = np.array((0.0, 0.0, 0.0))