Make shape entities

src/play_clj/core.clj

@@ -26,7 +26,8 @@
            [com.badlogic.gdx.scenes.scene2d Actor Stage]
            [com.badlogic.gdx.scenes.scene2d.utils ActorGestureListener Align
             ChangeListener ClickListener DragListener FocusListener]
-           [com.badlogic.gdx.utils Timer$Task]))
+           [com.badlogic.gdx.utils Timer$Task]
+           [play_clj.entities ShapeEntity]))
 
 (load "core_basics")
 (load "core_cameras")

src/play_clj/core_graphics.clj

@@ -14,21 +14,6 @@
   [object k & options]
   `(u/call! ^Pixmap ~object ~k ~@options))
 
-(defn shape
-  "Returns a [ShapeRenderer](http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/glutils/ShapeRenderer.html).
-
-    (shape)"
-  ([]
-    (ShapeRenderer.))
-  ([max-vertices]
-    (ShapeRenderer. max-vertices)))
-
-(defmacro shape!
-  "Calls a single method on a `shape`."
-  [screen k & options]
-  `(let [^ShapeRenderer object# (u/get-obj ~screen :renderer)]
-     (u/call! object# ~k ~@options)))
-
 (defmacro shape-type
   "Returns a static field from [ShapeRenderer.ShapeType](http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/glutils/ShapeRenderer.ShapeType.html).
 
@@ -36,6 +21,33 @@
   [k]
   `~(u/gdx-field :graphics :glutils "ShapeRenderer$ShapeType" (u/key->pascal k)))
 
+(defn shape*
+  ([]
+    (ShapeEntity. (ShapeRenderer.)))
+  ([max-vertices]
+    (ShapeEntity. (ShapeRenderer. max-vertices))))
+
+(defmacro shape
+  "Returns an entity based on [ShapeRenderer](http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/glutils/ShapeRenderer.html).
+
+    (shape :filled)"
+  [type & options]
+  (when (seq (clojure.set/intersection #{:begin :end} (set options)))
+    (-> "No need to call :begin or :end, because it's done for you."
+        Throwable.
+        throw))
+  `(let [entity# ~(if (keyword? type)
+                    `(assoc (shape*) :type (shape-type ~type))
+                    type)
+         ^ShapeRenderer object# (u/get-obj entity# :object)]
+     (assoc entity# :draw! (fn [] (u/calls! object# ~@options)))))
+
+(defmacro shape!
+  "Calls a single method on a `shape`."
+  [entity k & options]
+  `(let [^ShapeRenderer object# (u/get-obj ~entity :object)]
+     (u/call! object# ~k ~@options)))
+
 ; tiled maps
 
 (defn tiled-map*
@@ -274,20 +286,20 @@ with the tiled map file at `path` and `unit` scale.
   (fn [screen _] (-> screen :renderer class)))
 
 (defmethod draw! BatchTiledMapRenderer
-  [{:keys [^BatchTiledMapRenderer renderer]} entities]
+  [{:keys [^BatchTiledMapRenderer renderer] :as screen} entities]
   (let [^SpriteBatch batch (.getSpriteBatch renderer)]
     (.begin batch)
     (doseq [entity entities]
-      (e/draw-entity! entity batch))
+      (e/draw-entity! entity screen batch))
     (.end batch))
   entities)
 
 (defmethod draw! Stage
-  [{:keys [^Stage renderer]} entities]
+  [{:keys [^Stage renderer] :as screen} entities]
   (let [^SpriteBatch batch (.getSpriteBatch renderer)]
     (.begin batch)
     (doseq [entity entities]
-      (e/draw-entity! entity batch))
+      (e/draw-entity! entity screen batch))
     (.end batch))
   entities)
 
@@ -295,7 +307,7 @@ with the tiled map file at `path` and `unit` scale.
   [{:keys [^ModelBatch renderer ^Camera camera] :as screen} entities]
   (.begin renderer camera)
   (doseq [entity entities]
-    (e/draw-entity! entity screen))
+    (e/draw-entity! entity screen nil))
   (.end renderer)
   entities)
 
@@ -413,24 +425,6 @@ supplied, they will be sorted by :y (latitude).
                           sort-fn)]
         (if-let [layer (:layer entity)]
           (.renderTileLayer renderer layer)
-          (e/draw-entity! entity batch)))
+          (e/draw-entity! entity screen batch)))
       (.end batch))
     entities))
-
-(defmacro render-shapes!
-  "Draws shapes with a `shape` renderer.
-
-    (render-shapes! screen :filled
-                    :set-color (color :blue)
-                    :line 0 0 10 10
-                    :rect 10 10 20 20
-                    :circle 0 30 5)"
-  [screen type & options]
-  (when (seq (clojure.set/intersection #{:begin :end} (set options)))
-    (-> "No need to call :begin or :end, because it's done for you."
-        Throwable.
-        throw))
-  `(let [^ShapeRenderer object# (u/get-obj ~screen :renderer)]
-     (.begin object# (shape-type ~type))
-     (u/calls! object# ~@options)
-     (.end object#)))

src/play_clj/core_listeners.clj

@@ -205,9 +205,7 @@
           (.destroyJoint world joint))))))
 
 (defn ^:private update-screen!
-  ([{:keys [renderer ^Camera camera world g2dp-listener]}]
-    (when (and camera (isa? (type renderer) ShapeRenderer))
-      (.setProjectionMatrix ^ShapeRenderer renderer (. camera combined)))
+  ([{:keys [world g2dp-listener]}]
     (when (isa? (type world) World)
       (.setContactListener ^World world g2dp-listener)))
   ([{:keys [renderer world] :as screen} entities]

src/play_clj/entities.clj

@@ -1,21 +1,23 @@
 (ns play-clj.entities
   (:import [com.badlogic.gdx Gdx Graphics]
+           [com.badlogic.gdx.graphics Camera]
            [com.badlogic.gdx.graphics.g2d NinePatch ParticleEffect SpriteBatch
             TextureRegion]
            [com.badlogic.gdx.graphics.g3d Environment ModelBatch ModelInstance]
+           [com.badlogic.gdx.graphics.glutils ShapeRenderer]
            [com.badlogic.gdx.scenes.scene2d Actor]))
 
 (defprotocol Entity
-  (draw-entity! [this batch] "Draws the entity"))
+  (draw-entity! [this screen batch] "Draws the entity"))
 
 (extend-protocol Entity
   clojure.lang.PersistentArrayMap
-  (draw-entity! [this batch])
+  (draw-entity! [this screen batch])
   clojure.lang.PersistentHashMap
-  (draw-entity! [this batch]))
+  (draw-entity! [this screen batch]))
 
 (defrecord TextureEntity [object] Entity
-  (draw-entity! [{:keys [^TextureRegion object x y width height]} batch]
+  (draw-entity! [{:keys [^TextureRegion object x y width height]} _ batch]
     (let [x (float (or x 0))
           y (float (or y 0))
           width (float (or width (.getRegionWidth object)))
@@ -23,7 +25,7 @@
       (.draw ^SpriteBatch batch object x y width height))))
 
 (defrecord NinePatchEntity [object] Entity
-  (draw-entity! [{:keys [^NinePatch object x y width height]} batch]
+  (draw-entity! [{:keys [^NinePatch object x y width height]} _ batch]
     (let [x (float (or x 0))
           y (float (or y 0))
           width (float (or width (.getTotalWidth object)))
@@ -31,7 +33,7 @@
       (.draw object ^SpriteBatch batch x y width height))))
 
 (defrecord ParticleEffectEntity [object] Entity
-  (draw-entity! [{:keys [^ParticleEffect object x y delta-time]} batch]
+  (draw-entity! [{:keys [^ParticleEffect object x y delta-time]} _ batch]
     (let [x (float (or x 0))
           y (float (or y 0))
           ^Graphics g (Gdx/graphics)
@@ -40,7 +42,7 @@
       (.draw object ^SpriteBatch batch delta-time))))
 
 (defrecord ActorEntity [object] Entity
-  (draw-entity! [{:keys [^Actor object] :as entity} batch]
+  (draw-entity! [{:keys [^Actor object] :as entity} _ batch]
     (doseq [[k v] entity]
       (case k
         :x (.setX object v)
@@ -52,5 +54,16 @@
 
 (defrecord ModelEntity [object] Entity
   (draw-entity! [{:keys [^ModelInstance object]}
-                 {:keys [^ModelBatch renderer ^Environment attributes]}]
+                 {:keys [^ModelBatch renderer ^Environment attributes]}
+                 _]
     (.render renderer object attributes)))
+
+(defrecord ShapeEntity [object] Entity
+  (draw-entity! [{:keys [^ShapeRenderer object type draw!]}
+                 {:keys [^Camera camera]}
+                 _]
+    (when camera
+      (.setProjectionMatrix object (. camera combined)))
+    (.begin object type)
+    (draw!)
+    (.end object)))