INITIAL COMMIT

main.c

@@ -0,0 +1,126 @@
+#include "wapp.h"
+#include "raylib.h"
+#include <stdint.h>
+#include <assert.h>
+
+#define WIDTH 1280
+#define HEIGHT 720
+#define HALF_WIDTH (WIDTH * 0.5f)
+#define HALF_HEIGHT (HEIGHT * 0.5f)
+#define MAX_OBJ_DIM 80
+#define MIN_OBJ_DIM 20
+#define BG_COLOR (Color){.r = 0xea, .g = 0xf2, .b = 0xe3, .a = 0xff}
+#define FG_COLOR (Color){.r = 0x42, .g = 0x4C, .b = 0x55, .a = 0xff}
+#define OBJECT_COUNT 1
+#define MSG_BUF_LEN 4096
+#define abs(A) (A < 0 ? A * -1 : A)
+#define min(A, B) (A < B ? A : B)
+#define max(A, B) (A > B ? A : B)
+
+typedef struct Position Position;
+struct Position {
+  f32 x;
+  f32 y;
+};
+
+typedef struct Scale Scale;
+struct Scale {
+  f32 width;
+  f32 height;
+};
+
+typedef struct Velocity Velocity;
+struct Velocity {
+  f32 x;
+  f32 y;
+};
+
+typedef struct Object Object;
+struct Object {
+  Position position;
+  Scale scale;
+  Velocity velocity;
+};
+
+void init_object(Object *object, XOR256State *state);
+void update_object(Object *object);
+void move_object(Object *object);
+f32 get_random_float(XOR256State *state);
+
+int main(void) {
+  InitWindow(WIDTH, HEIGHT, "Handle test");
+  SetTargetFPS(120);
+
+  Allocator arena   = wapp_mem_arena_allocator_init(MB(10));
+  XOR256State state = wapp_prng_xorshift_init_state();
+  Object *objects   = wapp_mem_allocator_alloc(&arena, sizeof(Object) * OBJECT_COUNT);
+  assert(objects != NULL);
+
+  for (u64 i = 0; i < OBJECT_COUNT; ++i) {
+    Object *object = &(objects[i]);
+    init_object(object, &state);
+  }
+
+  while (!WindowShouldClose()) {
+    for (u64 i = 0; i < OBJECT_COUNT; ++i) {
+      Object *object = &(objects[i]);
+      move_object(object);
+    }
+
+    BeginDrawing();
+
+    ClearBackground(BG_COLOR);
+
+    for (u64 i = 0; i < OBJECT_COUNT; ++i) {
+      Object *object = &(objects[i]);
+      DrawRectangle(
+          (i32)object->position.x,
+          (i32)object->position.y,
+          (i32)object->scale.width,
+          (i32)object->scale.height,
+          FG_COLOR
+      );
+    }
+
+    EndDrawing();
+  }
+
+  wapp_mem_arena_allocator_destroy(&arena);
+
+  CloseWindow();
+
+  return 0;
+}
+
+void init_object(Object *object, XOR256State *state) {
+  object->position = (Position){
+    .x = wapp_prng_xorshift_256(state) % WIDTH,
+    .y = wapp_prng_xorshift_256(state) % HEIGHT,
+  };
+  object->scale = (Scale){
+    .width  = max(wapp_prng_xorshift_256(state) % MAX_OBJ_DIM, MIN_OBJ_DIM),
+    .height = max(wapp_prng_xorshift_256(state) % MAX_OBJ_DIM, MIN_OBJ_DIM),
+  };
+  object->velocity = (Velocity){
+    .x = get_random_float(state),
+    // .y = get_random_float(state),
+    .y = 0.0f,
+  };
+}
+
+void move_object(Object *object) {
+  object->position.x += object->velocity.x;
+  object->position.y += object->velocity.y;
+
+  if (object->position.x > WIDTH ||
+      object->position.x + object->scale.width < 0 ||
+      object->position.y > HEIGHT ||
+      object->position.y + object->scale.height < 0
+  ) {
+  }
+}
+
+f32 get_random_float(XOR256State *state) {
+  i64 random = (i64)wapp_prng_xorshift_256(state) - INT64_MAX;
+  return (f32)(random) / (f32)(INT64_MAX);
+}