From c664ddaf47e078219b848b9e2d9c3c4241420261 Mon Sep 17 00:00:00 2001
From: ilotterytea <iltsu@alright.party>
Date: Tue, 10 Dec 2024 19:50:26 +0500
Subject: feat: render stars!

---
 src/star.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/star.c

(limited to 'src/star.c')

diff --git a/src/star.c b/src/star.c
new file mode 100644
index 0000000..6251e03
--- /dev/null
+++ b/src/star.c
@@ -0,0 +1,43 @@
+#include "star.h"
+
+#include <math.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "constants.h"
+#include "raylib.h"
+
+Vector3 Generate3DPosition() {
+  srand(time(0));
+  double random = (double)rand() / RAND_MAX;
+
+  double angle = random * 2.0 * M_PI;
+  double radius =
+      (GetScreenHeight() / SPACE_SIZE) + (random * GetScreenHeight());
+
+  float x = radius * sin(angle);
+  float y = radius * cos(angle);
+
+  Vector3 v = {x, y, STAR_START_POS_Z};
+  return v;
+}
+
+Star StarCreate() {
+  return (Star){Generate3DPosition(), {1, 1}, {0, 0}, 0.25f, BLACK};
+}
+
+void StarUpdate(Star *star) {
+  float screen_center_x = GetScreenWidth() / 2.0;
+  float screen_center_y = GetScreenHeight() / 2.0;
+
+  float x = star->position.x / star->position.z + screen_center_x;
+  float y = star->position.y / star->position.z + screen_center_y;
+
+  star->renderPosition.x = x;
+  star->renderPosition.y = y;
+
+  float size = (STAR_START_POS_Z - star->position.z) / (0.2 * star->position.z);
+
+  star->size.x = size;
+  star->size.y = size;
+}
-- 
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