1 files changed, 16 insertions, 0 deletions
diff --git a/src/ui.cpp b/src/ui.cpp
index fdb9eee..f356afa 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -4,6 +4,14 @@
 
 #include <imgui.h>
 
+static void AddSand(Sandbox& sb) {
+    for (int y = 80; y <= 90; ++y) {
+        for (int x = 10; x <= 13; ++x) {
+            sb.set_sand(x, y, Tile{ .so = Tile::SAND });
+        }
+    }
+}
+
 void ShowEverything() {
     ImGui::Begin("Sandbox");
     constexpr int kWidth = 40;
@@ -13,6 +21,14 @@ void ShowEverything() {
     static OglImage gl;
     sandbox.simulate_step();
     gl.upload(reinterpret_cast<const char*>(sandbox._bitmap.data()), kWidth, kHeight);
+
+    if (ImGui::Button("Reset sandbox")) {
+        sandbox = Sandbox(40, 100);
+    }
+    if (ImGui::Button("Add sand")) {
+        AddSand(sandbox);
+    }
+
     constexpr float kScale = 4.0f;
     constexpr ImVec2 kSize(kWidth * kScale, kHeight * kScale);
     ImGui::Image(gl.as_imgui(), kSize, ImVec2(0, 1), ImVec2(1, 0));