init

src/sprite.c

@@ -0,0 +1,84 @@
+#include "sprite.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "raylib.h"
+#include "raymath.h"
+
+void* xmalloc(size_t size)
+{
+    void* p = malloc(size);
+    if (!p) abort();
+    return p;
+}
+
+Sprite* sprite_new(const char* path,
+                   Vector2* pos,
+                   Vector2* anchor,
+                   Rectangle* source,
+                   Color* color)
+{
+    assert(path && "path must not be empty");
+
+    Sprite* sprite = xmalloc(sizeof(Sprite));
+    if (!sprite) abort();
+
+    sprite->tex = LoadTexture(path);
+
+    sprite->pos = pos != NULL ? *pos : (Vector2){0, 0};
+
+    sprite->source =
+        source != NULL
+            ? *source
+            : (Rectangle){0, 0, sprite->tex.width, sprite->tex.height};
+
+    sprite->anchor = anchor != NULL ? *anchor
+                                    : (Vector2){sprite->source.width / 2.0f,
+                                                sprite->source.height / 2.0f};
+
+    sprite->color = color != NULL ? *color : (Color){26, 164, 98, 255};
+
+    sprite->animation = NULL;
+
+    return sprite;
+}
+
+void sprite_draw(Sprite* s)
+{
+    Rectangle source = s->source;
+
+    // update source rect if sprite has animation
+    if (s->animation) {
+        source.x = source.width * (float)s->animation->current_frame;
+    }
+
+    DrawTextureRec(
+        s->tex, source, Vector2Subtract(s->pos, s->anchor), s->color);
+}
+
+void sprite_free(Sprite* s)
+{
+    if (s->animation) free(s->animation);
+    UnloadTexture(s->tex);
+    free(s);
+}
+
+//
+// Animation System
+//
+void animation_update(Animation* a)
+{
+    float dt = GetFrameTime();
+    a->current_time += dt;
+
+    if (a->current_time >= 1.0f / a->fps) {
+        a->current_time = 0;
+        a->current_frame++;
+
+        if (a->current_frame >= a->frame_count) {
+            a->current_frame = 0;
+        }
+    }
+}