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cpp/spinner.cpp

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+#include <Windows.h>
+#include <cstdio>
+#include <cmath>
+#include <tuple>
+
+constexpr auto num_points = 10;
+constexpr auto sleep_msec = 1;
+constexpr auto radius = 100.0f;
+
+int main() {
+	const auto window_handle = FindWindow(nullptr, "osu!");
+	if (!window_handle) {
+		printf("FATAL: Could not find osu!. (0x%X)\n", GetLastError());
+		return -1;
+	}
+
+	auto get_desired_pos = [&]() -> std::tuple<int, int> {
+		static auto counter = 0;
+		counter++;
+
+		RECT rect;
+		GetWindowRect(window_handle, &rect);
+
+		const auto center_x = rect.left + (rect.right - rect.left) / 2;
+		const auto center_y = rect.top + (rect.bottom - rect.top) / 2;
+
+		const auto angle = 3.1415926f * 2.0f * (float)counter / (float)num_points;
+		
+		if (counter > num_points) {
+			counter = 0;
+		}
+
+		return { center_x + radius * sin(angle), center_y + radius * cos(angle) };
+	};
+
+	while (!GetAsyncKeyState(VK_DELETE)) {
+		if (GetAsyncKeyState('P')) {
+			std::apply(SetCursorPos, get_desired_pos());
+		}
+
+		Sleep(sleep_msec);
+	}
+}