Add screen to world example to the basic_3d scene

examples/scenes/basic_3d/basic_3d.collection

@@ -265,6 +265,8 @@ embedded_instances {
   "    z: 0.0\n"
   "    w: 1.0\n"
   "  }\n"
+  "  property_decls {\n"
+  "  }\n"
   "}\n"
   ""
   position {
@@ -284,3 +286,45 @@ embedded_instances {
     z: 1.0
   }
 }
+embedded_instances {
+  id: "raycast_target"
+  data: "embedded_components {\n"
+  "  id: \"mesh\"\n"
+  "  type: \"mesh\"\n"
+  "  data: \"material: \\\"/scene3d/materials/primitive_max_yellow_red.material\\\"\\n"
+  "vertices: \\\"/scene3d/assets/meshes/primitive_sphere.buffer\\\"\\n"
+  "textures: \\\"/scene3d/assets/textures/grid_10x10.png\\\"\\n"
+  "primitive_type: PRIMITIVE_TRIANGLES\\n"
+  "position_stream: \\\"position\\\"\\n"
+  "normal_stream: \\\"normal\\\"\\n"
+  "\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
+  ""
+  position {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+  scale3 {
+    x: 0.5
+    y: 0.5
+    z: 0.5
+  }
+}

examples/scenes/basic_3d/basic_3d_main.script

@@ -19,5 +19,26 @@ end
 function on_message(self, message_id, message, sender)
 end
 
+local RAYCAST_GROUPS = { hash("default") }
+local CLOSEST = { all = false }
+
 function on_input(self, action_id, action)
+    if action_id == nil or action_id == hash("touch") then
+        local from = render3d.screen_to_world(action.screen_x, action.screen_y, 1)
+        local to = render3d.screen_to_world(action.screen_x, action.screen_y, 50)
+        -- UNCOMMENT TO DEBUG
+        -- if action.pressed then
+        --     go.set("/raycast_target", "position", from)
+        --     go.animate("/raycast_target", "position", go.PLAYBACK_ONCE_FORWARD, to, go.EASING_LINEAR, 3)
+        -- else
+            local results = physics.raycast(from, to, RAYCAST_GROUPS, CLOSEST)
+            if results ~= nil then
+                for _, result in ipairs(results) do
+                    go.cancel_animations("/raycast_target", "position")
+                    go.animate("/raycast_target", "position", go.PLAYBACK_ONCE_FORWARD, result.position, go.EASING_OUTQUAD, 0.1)
+                    break
+                end
+            end
+        -- end
+    end
 end