From 6df816e778a7067eeb36f423aa507d74e89ecb26 Mon Sep 17 00:00:00 2001
From: Sara <sara@saragerretsen.nl>
Date: Sun, 8 Oct 2023 23:07:04 +0200
Subject: [PATCH] added sprite entity trait

---
 src/sprite_entity.c |  8 ++++++++
 src/sprite_entity.h | 29 +++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 src/sprite_entity.c
 create mode 100644 src/sprite_entity.h

diff --git a/src/sprite_entity.c b/src/sprite_entity.c
new file mode 100644
index 0000000..4b3a0a9
--- /dev/null
+++ b/src/sprite_entity.c
@@ -0,0 +1,8 @@
+#include "sprite_entity.h"
+#include "sprite.h"
+
+void sprite_entity_draw(SpriteEntity self) {
+    Sprite* sprite = self.tc->get_sprite(self.data);
+    Transform* transform = self.transformable->get_transform(self.data);
+    sprite_draw(sprite, *transform);
+}
diff --git a/src/sprite_entity.h b/src/sprite_entity.h
new file mode 100644
index 0000000..3869c10
--- /dev/null
+++ b/src/sprite_entity.h
@@ -0,0 +1,29 @@
+#ifndef _fencer_sprite_entity_h
+#define _fencer_sprite_entity_h
+
+#include "typeclass_helpers.h"
+#include "sprite.h"
+
+typedef struct {
+    Sprite* (*const get_sprite)(void*);
+} ISpriteEntity;
+
+typedef struct {
+    void* data;
+    ISpriteEntity const* tc;
+    ITransformable const* transformable;
+} SpriteEntity;
+
+extern void sprite_entity_draw(SpriteEntity self);
+
+#define impl_SpriteEntity_for(T, get_sprite_f)\
+static inline SpriteEntity T##_as_SpriteEntity(T* x) {\
+    TC_FN_TYPECHECK(Sprite*, get_sprite_f, T*);\
+    static ISpriteEntity const tc = {\
+        .get_sprite = (Sprite*(*const)(void*)) get_sprite_f,\
+    };\
+    Transformable t = T##_as_Transformable(x);\
+    return (SpriteEntity){.tc = &tc, .transformable = t.tc, .data = x};\
+}
+
+#endif // !_fencer_sprite_entity_h