adding in sandbox

sandbox/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Vulkan playground. Links the engine (and its third-party libraries), and
+# can also include the engine's internal headers from engine/src.
+file(GLOB_RECURSE SOURCES CONFIGURE_DEPENDS *.cpp)
+
+add_executable(sandbox ${SOURCES})
+
+target_compile_definitions(sandbox PRIVATE
+  SANDBOX_SHADER_DIR="${CMAKE_CURRENT_SOURCE_DIR}/shaders"
+)
+
+# engine/include comes in through the engine's public include path.
+target_include_directories(sandbox PRIVATE
+  "${CMAKE_SOURCE_DIR}/engine/src"
+)
+
+# The engine publicly provides vulkan, vma, shaderc, glfw, glm, imgui, entt
+# and Tracy, plus the GLM defines. The rest are engine-private.
+target_link_libraries(sandbox PRIVATE
+  ${PROJECT_NAME}
+  imguizmo
+  stb_image
+)

sandbox/main.cpp

@@ -0,0 +1,28 @@
+#define GLFW_INCLUDE_VULKAN
+#include <GLFW/glfw3.h>
+
+#include <algorithm>
+#include <array>
+#include <cmath>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <glm/mat4x4.hpp>
+#include <glm/vec4.hpp>
+#include <vector>
+
+#define VK_CHECK(expr)                                                     \
+  do {                                                                     \
+    vk::Result result_ = (expr);                                           \
+    if (result_ != vk::Result::eSuccess) {                                 \
+      std::fprintf(stderr, "%s:%d: %s -> %d\n", __FILE__, __LINE__, #expr, \
+                   result_);                                               \
+      std::abort();                                                        \
+    }                                                                      \
+  } while (0)
+
+constexpr uint32_t WIDTH = 1280;
+constexpr uint32_t HEIGHT = 720;
+constexpr const char* NAME = "";
+
+int main() { return EXIT_SUCCESS; }