Interpolated HUD and radial menu UI.

mods/artifact_player/radial_menu.lua

@@ -0,0 +1,48 @@
+local ns = artifact
+
+function ns.show_radial_menu(m, menu)
+    m._menu = {
+        name = menu.name,
+        count = #menu,
+        step = math.pi *2 /#menu,
+        pos = vector.zero(),
+        cursor = artifact.hud_add(m, {
+            type = "image",
+            pos = {x=0.5, y=0.5},
+            offset = {x=0, y=0},
+            image = "artifact_radial_cursor.png"
+        })
+    }
+    for i, x in ipairs(menu) do
+        local size = 150
+        local angle = m._menu.step *(i -1) -math.pi
+        local el = artifact.hud_add(m, {
+            name = menu.name.."_"..i,
+            type = "image",
+            pos = {x=0.5,y=0.5},
+            scale = {x=0.1,y=0.1},
+            offset = {x=math.sin(angle) *size,y=math.cos(angle) *size},
+            image = "artifact_construct_test_icon.png",
+            opacity = 128
+        })
+        el:animate {
+            scale = {
+                value = {x=0.7, y=0.7},
+                duration = 0.1
+            }
+        }
+        m._menu[#m._menu +1] = el
+    end
+    m.object:hud_set_flags{crosshair = false}
+end
+
+function ns.dismiss_radial_menu(m, name)
+    -- This is in case we only want to close a specific menu while leaving others intact.
+    if name and m._menu.name ~= name then return end
+    for _, x in ipairs(m._menu) do
+        x:remove(m)
+    end
+    m._menu.cursor:remove(m)
+    m._menu = nil
+    m.object:hud_set_flags{crosshair = true}
+end