feat(renderer3d): add linear fog mode with start/end distance controls

.github/workflows/ci.yml

@@ -116,6 +116,13 @@ jobs:
         include: ${{ fromJSON(github.event_name == 'pull_request' && '[{"os":"ubuntu-latest","rust":"stable","lane":"full","run_windows_native_clippy":false},{"os":"ubuntu-latest","rust":"nightly","lane":"smoke","run_windows_native_clippy":false},{"os":"macos-latest","rust":"stable","lane":"smoke","run_windows_native_clippy":false},{"os":"windows-latest","rust":"stable","lane":"clippy-only","run_windows_native_clippy":true}]' || '[{"os":"ubuntu-latest","rust":"stable","lane":"full","run_windows_native_clippy":false},{"os":"macos-latest","rust":"stable","lane":"full","run_windows_native_clippy":false},{"os":"windows-latest","rust":"stable","lane":"full","run_windows_native_clippy":true},{"os":"ubuntu-latest","rust":"nightly","lane":"smoke","run_windows_native_clippy":false},{"os":"macos-latest","rust":"nightly","lane":"smoke","run_windows_native_clippy":false}]') }}
 
     steps:
+    - name: Free disk space (Ubuntu)
+      if: matrix.os == 'ubuntu-latest' && matrix.lane == 'full'
+      run: |
+        sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /opt/hostedtoolcache/CodeQL
+        sudo docker image prune --all --force || true
+        df -h /
+
     - uses: actions/checkout@v6
 
     - name: Download shared codegen artifact

.gitignore

@@ -111,6 +111,7 @@ sdks/c/tests/build/
 
 # Claude worktrees (ephemeral, per-session)
 .claude/worktrees/
+.worktrees/
 .mcp.json
 
 # Gradle build artifacts

codegen/ffi_manifest.json

@@ -1779,6 +1779,113 @@
       "return_type": "bool",
       "is_unsafe": true
     },
+    "goud_input_gamepad_axis": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "axis: u32"
+      ],
+      "return_type": "f32",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_button_just_pressed": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "button: u32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_button_just_released": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "button: u32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_button_pressed": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "button: u32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_connected": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_connected_count": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId"
+      ],
+      "return_type": "u32",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_left_stick": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "out_x: *mut f32",
+        "out_y: *mut f32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": true
+    },
+    "goud_input_gamepad_left_trigger": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32"
+      ],
+      "return_type": "f32",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_right_stick": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "out_x: *mut f32",
+        "out_y: *mut f32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": true
+    },
+    "goud_input_gamepad_right_trigger": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32"
+      ],
+      "return_type": "f32",
+      "is_unsafe": false
+    },
+    "goud_input_gamepad_set_vibration": {
+      "source_file": "ffi/input/gamepad.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "gamepad_id: u32",
+        "intensity: f32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
     "goud_input_get_mouse_delta": {
       "source_file": "ffi/input/mouse.rs",
       "params": [
@@ -3098,6 +3205,20 @@
       "return_type": "bool",
       "is_unsafe": false
     },
+    "goud_renderer3d_configure_fog_linear": {
+      "source_file": "ffi/renderer3d/environment/mod.rs",
+      "params": [
+        "context_id: GoudContextId",
+        "enabled: bool",
+        "start_distance: f32",
+        "end_distance: f32",
+        "r: f32",
+        "g: f32",
+        "b: f32"
+      ],
+      "return_type": "bool",
+      "is_unsafe": false
+    },
     "goud_renderer3d_configure_grid": {
       "source_file": "ffi/renderer3d/environment/mod.rs",
       "params": [
@@ -6404,5 +6525,5 @@
       "is_unsafe": false
     }
   },
-  "total_count": 649
+  "total_count": 661
 }

codegen/ffi_mapping.json

@@ -650,6 +650,7 @@
       "goud_renderer3d_set_grid_enabled": {},
       "goud_renderer3d_configure_skybox": {},
       "goud_renderer3d_configure_fog": {},
+      "goud_renderer3d_configure_fog_linear": {},
       "goud_renderer3d_set_fog_enabled": {},
       "goud_renderer3d_set_frustum_culling_enabled": {},
       "goud_renderer3d_set_skinning_mode": {},
@@ -763,7 +764,20 @@
       "goud_input_mouse_button_just_released": {},
       "goud_input_get_mouse_position": {},
       "goud_input_get_mouse_delta": {},
-      "goud_input_get_scroll_delta": {}
+      "goud_input_get_scroll_delta": {},
+      "goud_input_gamepad_button_pressed": {},
+      "goud_input_gamepad_button_just_pressed": {},
+      "goud_input_gamepad_button_just_released": {},
+      "goud_input_gamepad_axis": {}
+    },
+    "input_gamepad": {
+      "goud_input_gamepad_connected": {},
+      "goud_input_gamepad_connected_count": {},
+      "goud_input_gamepad_left_stick": {},
+      "goud_input_gamepad_right_stick": {},
+      "goud_input_gamepad_left_trigger": {},
+      "goud_input_gamepad_right_trigger": {},
+      "goud_input_gamepad_set_vibration": {}
     },
     "input_touch": {
       "goud_input_touch_count": {},

codegen/gen_ts_web.py

@@ -842,6 +842,13 @@ def gen_web_wrapper():
     lines.append("  getTouchDelta(_touchId: number): IVec2 { return { x: 0, y: 0 }; }")
     lines.append("")
 
+    # Gamepad input (stubs — WASM gamepad bindings not yet implemented)
+    lines.append("  isGamepadButtonPressed(_gamepadId: number, _button: number): boolean { return false; }")
+    lines.append("  isGamepadButtonJustPressed(_gamepadId: number, _button: number): boolean { return false; }")
+    lines.append("  isGamepadButtonJustReleased(_gamepadId: number, _button: number): boolean { return false; }")
+    lines.append("  getGamepadAxis(_gamepadId: number, _axis: number): number { return 0; }")
+    lines.append("")
+
     emit_jsdoc(lines, _method_docs.get("map_action_key"))
     lines.append("  mapActionKey(action: string, key: number): boolean { return this.handle.map_action_key(action, key); }")
     emit_jsdoc(lines, _method_docs.get("is_action_pressed"))
@@ -1124,6 +1131,7 @@ def gen_web_wrapper():
     lines.append("  setGridEnabled(_enabled: boolean): boolean { return false; }")
     lines.append("  configureSkybox(_enabled: boolean, _r: number, _g: number, _b: number, _a: number): boolean { return false; }")
     lines.append("  configureFog(_enabled: boolean, _r: number, _g: number, _b: number, _density: number): boolean { return false; }")
+    lines.append("  configureFogLinear(_enabled: boolean, _startDistance: number, _endDistance: number, _r: number, _g: number, _b: number): boolean { return false; }")
     lines.append("  setFogEnabled(_enabled: boolean): boolean { return false; }")
     lines.append("  render3D(): boolean { return false; }")
     lines.append("  setFrustumCullingEnabled(_enabled: boolean): number { return 0; }")

codegen/generated/goud_engine.h

@@ -2278,6 +2278,11 @@ bool goud_renderer3d_configure_skybox(struct GoudContextId context_id, bool enab
  */
 bool goud_renderer3d_configure_fog(struct GoudContextId context_id, bool enabled, float r, float g, float b, float density);
 
+/**
+ * Configures linear fog with explicit start/end distances.
+ */
+bool goud_renderer3d_configure_fog_linear(struct GoudContextId context_id, bool enabled, float start_distance, float end_distance, float r, float g, float b);
+
 /**
  * Sets fog enabled state.
  */

codegen/goud_sdk.schema.json

@@ -4756,6 +4756,66 @@
           ],
           "returns": "Vec2"
         },
+        {
+          "name": "isGamepadButtonPressed",
+          "doc": "Returns true if the specified gamepad button is currently pressed",
+          "params": [
+            {
+              "name": "gamepadId",
+              "type": "u32"
+            },
+            {
+              "name": "button",
+              "type": "u32"
+            }
+          ],
+          "returns": "bool"
+        },
+        {
+          "name": "isGamepadButtonJustPressed",
+          "doc": "Returns true if the specified gamepad button was just pressed this frame",
+          "params": [
+            {
+              "name": "gamepadId",
+              "type": "u32"
+            },
+            {
+              "name": "button",
+              "type": "u32"
+            }
+          ],
+          "returns": "bool"
+        },
+        {
+          "name": "isGamepadButtonJustReleased",
+          "doc": "Returns true if the specified gamepad button was just released this frame",
+          "params": [
+            {
+              "name": "gamepadId",
+              "type": "u32"
+            },
+            {
+              "name": "button",
+              "type": "u32"
+            }
+          ],
+          "returns": "bool"
+        },
+        {
+          "name": "getGamepadAxis",
+          "doc": "Returns the current value of a gamepad analog axis (-1.0 to 1.0)",
+          "params": [
+            {
+              "name": "gamepadId",
+              "type": "u32"
+            },
+            {
+              "name": "axis",
+              "type": "u32"
+            }
+          ],
+          "returns": "f32"
+        },
         {
           "$ref": "EcsMethods",
           "name": "spawnEmpty"
@@ -5359,6 +5419,37 @@
           ],
           "returns": "bool"
         },
+        {
+          "name": "configureFogLinear",
+          "doc": "Configures linear fog with explicit start and end distances",
+          "params": [
+            {
+              "name": "enabled",
+              "type": "bool"
+            },
+            {
+              "name": "startDistance",
+              "type": "f32"
+            },
+            {
+              "name": "endDistance",
+              "type": "f32"
+            },
+            {
+              "name": "r",
+              "type": "f32"
+            },
+            {
+              "name": "g",
+              "type": "f32"
+            },
+            {
+              "name": "b",
+              "type": "f32"
+            }
+          ],
+          "returns": "bool"
+        },
         {
           "name": "setFogEnabled",
           "doc": "Sets fog visibility",
@@ -8659,6 +8750,18 @@
         {
           "method": "getTouchDelta"
         },
+        {
+          "method": "isGamepadButtonPressed"
+        },
+        {
+          "method": "isGamepadButtonJustPressed"
+        },
+        {
+          "method": "isGamepadButtonJustReleased"
+        },
+        {
+          "method": "getGamepadAxis"
+        },
         {
           "method": "mapActionKey"
         },
@@ -12576,6 +12679,18 @@
           ],
           "returns_struct": "Vec2"
         },
+        "isGamepadButtonPressed": {
+          "ffi": "goud_input_gamepad_button_pressed"
+        },
+        "isGamepadButtonJustPressed": {
+          "ffi": "goud_input_gamepad_button_just_pressed"
+        },
+        "isGamepadButtonJustReleased": {
+          "ffi": "goud_input_gamepad_button_just_released"
+        },
+        "getGamepadAxis": {
+          "ffi": "goud_input_gamepad_axis"
+        },
         "getTouchCount": {
           "ffi": "goud_input_touch_count"
         },
@@ -12861,6 +12976,9 @@
         "configureFog": {
           "ffi": "goud_renderer3d_configure_fog"
         },
+        "configureFogLinear": {
+          "ffi": "goud_renderer3d_configure_fog_linear"
+        },
         "setFogEnabled": {
           "ffi": "goud_renderer3d_set_fog_enabled"
         },

goud_engine/build_support/ffi_manifest.rs

@@ -92,6 +92,7 @@ const FFI_SOURCE_FILES: &[&str] = &[
     "src/ffi/input/mouse.rs",
     "src/ffi/input/actions.rs",
     "src/ffi/input/touch.rs",
+    "src/ffi/input/gamepad.rs",
     // collision (not yet split)
     "src/ffi/collision.rs",
     // scene module