From 27c10af4248bfd3150850006ecdbd6833c7c27c9 Mon Sep 17 00:00:00 2001
From: Henrik Hautakoski <henrik.hautakoski@gmail.com>
Date: Sun, 14 Sep 2025 22:07:34 +0200
Subject: [PATCH] feat: add CheckShapeCollision()

---
 game/collision.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 game/collision.go

diff --git a/game/collision.go b/game/collision.go
new file mode 100644
index 0000000..5761563
--- /dev/null
+++ b/game/collision.go
@@ -0,0 +1,21 @@
+package game
+
+import "tetris/engine/core"
+
+func CheckShapeCollision(pos core.Vec2i8, shape *Shape, grid *Grid) bool {
+	for _, block := range shape.Coordinates() {
+		block = pos.Add(block)
+
+		// Can't collide if block is above the grid.
+		if block.Y < 0 {
+			continue
+		}
+
+		// Check if the block collides with the bottom of the grid.
+		if block.Y >= int8(grid.Height()) {
+			return true
+		}
+	}
+
+	return false
+}