Add scrolling for 3DOF devices.

src/input-mappings.js

@@ -32,13 +32,16 @@ const config = {
         axisMoveWithDeadzone: "msft_mr_axis_with_deadzone"
       },
       "daydream-controls": {
-        trackpad: "trackpad_dpad4"
+        trackpad: "trackpad_dpad4",
+        trackpad_scrolling: "trackpad_scrolling"
       },
       "gearvr-controls": {
-        trackpad: "trackpad_dpad4"
+        trackpad: "trackpad_dpad4",
+        trackpad_scrolling: "trackpad_scrolling"
       },
       "oculus-go-controls": {
-        trackpad: "trackpad_dpad4"
+        trackpad: "trackpad_dpad4",
+        trackpad_scrolling: "trackpad_scrolling"
       }
     }
   },
@@ -117,7 +120,8 @@ const config = {
         trackpad_dpad4_pressed_center_down: ["action_primary_down"],
         trackpad_dpad4_pressed_north_down: ["action_primary_down"],
         trackpad_dpad4_pressed_south_down: ["action_primary_down"],
-        trackpadup: ["action_primary_up"]
+        trackpadup: ["action_primary_up"],
+        scroll: { right: "move_duck" }
       },
       "gearvr-controls": {
         trackpad_dpad4_pressed_west_down: "snap_rotate_left",
@@ -127,7 +131,8 @@ const config = {
         trackpad_dpad4_pressed_south_down: ["action_primary_down"],
         trackpadup: ["action_primary_up"],
         triggerdown: ["action_primary_down"],
-        triggerup: ["action_primary_up"]
+        triggerup: ["action_primary_up"],
+        scroll: { right: "move_duck" }
       },
       "oculus-go-controls": {
         trackpad_dpad4_pressed_west_down: "snap_rotate_left",
@@ -137,7 +142,8 @@ const config = {
         trackpad_dpad4_pressed_south_down: ["action_primary_down"],
         trackpadup: ["action_primary_up"],
         triggerdown: ["action_primary_down"],
-        triggerup: ["action_primary_up"]
+        triggerup: ["action_primary_up"],
+        scroll: { right: "move_duck" }
       },
       keyboard: {
         m_press: "action_mute",