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play-clj/src/play_clj/entities.clj

119 lines
4.3 KiB
Clojure

(ns play-clj.entities
(:import [com.badlogic.gdx Gdx Graphics]
[com.badlogic.gdx.graphics Camera]
[com.badlogic.gdx.graphics.g2d Batch NinePatch ParticleEffect
TextureRegion]
[com.badlogic.gdx.graphics.g3d Environment ModelBatch ModelInstance]
[com.badlogic.gdx.graphics.glutils ShapeRenderer]
[com.badlogic.gdx.math Matrix4]
[com.badlogic.gdx.scenes.scene2d Actor]))
(defprotocol Entity
(draw! [this screen batch] "Draws the entity"))
(extend-protocol Entity
clojure.lang.PersistentArrayMap
(draw! [this screen batch])
clojure.lang.PersistentHashMap
(draw! [this screen batch])
nil
(draw! [this screen batch]))
(defrecord TextureEntity [object] Entity
(draw! [{:keys [^TextureRegion object x y width height
scale-x scale-y angle origin-x origin-y]}
_
batch]
(let [x (float (or x 0))
y (float (or y 0))
width (float (or width (.getRegionWidth object)))
height (float (or height (.getRegionHeight object)))]
(if (or scale-x scale-y angle)
(let [scale-x (float (or scale-x 1))
scale-y (float (or scale-y 1))
origin-x (float (or origin-x (/ width 2)))
origin-y (float (or origin-y (/ height 2)))
angle (float (or angle 0))]
(.draw ^Batch batch object x y origin-x origin-y width height
scale-x scale-y angle))
(.draw ^Batch batch object x y width height)))))
(defrecord NinePatchEntity [object] Entity
(draw! [{: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)))
height (float (or height (.getTotalHeight object)))]
(.draw object ^Batch batch x y width height))))
(defrecord ParticleEffectEntity [object] Entity
(draw! [{:keys [^ParticleEffect object x y delta-time]} _ batch]
(let [x (float (or x 0))
y (float (or y 0))
^Graphics g (Gdx/graphics)
delta-time (float (or delta-time (.getDeltaTime g)))]
(.setPosition object x y)
(.draw object ^Batch batch delta-time))))
(defrecord ActorEntity [object] Entity
(draw! [{:keys [^Actor object x y width height
scale-x scale-y angle origin-x origin-y]} _ batch]
(some->> x (.setX object))
(some->> y (.setY object))
(some->> width (.setWidth object))
(some->> height (.setHeight object))
(when (or scale-x scale-y angle)
(let [scale-x (float (or scale-x 1))
scale-y (float (or scale-y 1))
origin-x (float (or origin-x (/ (.getWidth object) 2)))
origin-y (float (or origin-y (/ (.getHeight object) 2)))
angle (float (or angle 0))]
(.setScaleX object scale-x)
(.setScaleY object scale-y)
(.setOriginX object origin-x)
(.setOriginY object origin-y)
(.setRotation object angle)))
(.draw object ^Batch batch 1)))
(defrecord ModelEntity [object] Entity
(draw! [{:keys [^ModelInstance object x y z]}
{:keys [^ModelBatch renderer ^Environment attributes]}
_]
(when (or x y z)
(let [^Matrix4 m (. object transform)
x (float (or x 0))
y (float (or y 0))
z (float (or z 0))]
(.setTranslation m x y z)))
(.render renderer object attributes)))
(defrecord ShapeEntity [object] Entity
(draw! [{:keys [^ShapeRenderer object type draw!
x y scale-x scale-y angle]}
{:keys [^Camera camera]}
batch]
(when batch
(.end ^Batch batch))
(when camera
(.setProjectionMatrix object (. camera combined)))
(.begin object type)
(when (or x y scale-x scale-y angle)
(let [x (float (or x 0))
y (float (or y 0))
scale-x (float (or scale-x 1))
scale-y (float (or scale-y 1))
angle (float (or angle 0))]
(.identity object)
(.translate object x y 0)
(.scale object scale-x scale-y 1)
(.rotate object 0 0 1 angle)))
(draw!)
(.end object)
(when batch
(.begin ^Batch batch))))
(defrecord BundleEntity [entities] Entity
(draw! [{:keys [entities] :as entity} screen batch]
(doseq [e entities]
(draw! (merge e (apply dissoc entity (keys e))) screen batch))))