From 2fa8e016da1911247db019d0a2e7659e9f6563db Mon Sep 17 00:00:00 2001
From: Mars <mars@pupbrained.xyz>
Date: Wed, 23 Oct 2024 13:10:18 -0400
Subject: [PATCH] weh

---
 flake.lock   | 12 +++++------
 src/main.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 61 insertions(+), 9 deletions(-)

diff --git a/flake.lock b/flake.lock
index b724458..532d46a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1729293761,
-        "narHash": "sha256-bkAI9eZGSR+RqM/ZpBV7eZAwHtek9oPC7Ma2TFN0FnQ=",
+        "lastModified": 1729632202,
+        "narHash": "sha256-BqWFOqG9Iuzf5wm9dyVWPeH1SPxSjCxo3inUSnYqxaQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f1812eb562c2253492e7f2f0122b40177e46826c",
+        "rev": "5a95c26209c2e136ef7da309824f562253b5fd7a",
         "type": "github"
       },
       "original": {
@@ -58,11 +58,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1729242555,
-        "narHash": "sha256-6jWSWxv2crIXmYSEb3LEVsFkCkyVHNllk61X4uhqfCs=",
+        "lastModified": 1729613947,
+        "narHash": "sha256-XGOvuIPW1XRfPgHtGYXd5MAmJzZtOuwlfKDgxX5KT3s=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "d986489c1c757f6921a48c1439f19bfb9b8ecab5",
+        "rev": "aac86347fb5063960eccb19493e0cadcdb4205ca",
         "type": "github"
       },
       "original": {
diff --git a/src/main.cpp b/src/main.cpp
index 7392b32..047f982 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -200,6 +200,8 @@ class VulkanApp {
   bool mFramebufferResized = false; ///< Flag indicating if the framebuffer was resized
   u32  mCurrentFrame       = 0;     ///< Index of the current frame being rendered
 
+  glm::mat4 mView; ///< View matrix
+
   /**
    * @brief Struct to store queue family indices.
    *
@@ -240,6 +242,40 @@ class VulkanApp {
     alignas(16) glm::mat4 proj;  ///< Projection matrix
   };
 
+  struct Camera {
+    glm::dvec3 position;
+    glm::dvec3 front;
+    glm::dvec3 up;
+    f64        speed {};
+
+    Camera() : position(2.0, 2.0, 2.0), front(0.0, 0.0, 0.0), up(0.0, 0.0, 1.0) {}
+
+    [[nodiscard]] fn getViewMatrix() const -> glm::mat4 { return glm::lookAt(position, front, up); }
+
+    fn moveForward(f64 deltaTime) -> void { position += speed * front * deltaTime; }
+
+    fn moveBackward(f64 deltaTime) -> void { position -= speed * front * deltaTime; }
+
+    fn moveLeft(f64 deltaTime) -> void {
+      position -= glm::normalize(glm::cross(front, up)) * speed * deltaTime;
+    }
+
+    fn moveRight(f64 deltaTime) -> void {
+      position += glm::normalize(glm::cross(front, up)) * speed * deltaTime;
+    }
+  };
+
+  static fn processInput(vkfw::Window& window, Camera& camera, const f64& deltaTime) -> void {
+    if (window.getKey(vkfw::Key::eW) == vkfw::eTrue)
+      camera.moveForward(deltaTime);
+    if (window.getKey(vkfw::Key::eA) == vkfw::eTrue)
+      camera.moveLeft(deltaTime);
+    if (window.getKey(vkfw::Key::eS) == vkfw::eTrue)
+      camera.moveBackward(deltaTime);
+    if (window.getKey(vkfw::Key::eD) == vkfw::eTrue)
+      camera.moveRight(deltaTime);
+  }
+
   /**
    * @brief Update the FPS counter in the window title.
    *
@@ -415,8 +451,25 @@ class VulkanApp {
    * polls for events and draws frames until the window is closed.
    */
   fn mainLoop() -> void {
+    Camera camera;
+
+    // Set initial time variables
+    f64 lastFrame = 0.0;
+    f64 deltaTime = 0.0;
+
     // While the window is open,
     while (!mWindow->shouldClose()) {
+      // Calculate time between frames
+      f64 currentFrame = vkfw::getTime();
+      deltaTime        = currentFrame - lastFrame;
+      lastFrame        = currentFrame;
+
+      // Process input for camera movement
+      processInput(mWindow.get(), camera, deltaTime);
+
+      // Create view matrix from camera
+      mView = camera.getViewMatrix();
+
       // Update the FPS counter
       updateFPS(mWindow.get(), "Vulkan");
 
@@ -2087,14 +2140,13 @@ class VulkanApp {
       // Model matrix - glm::rotate(matrix, angle, axis)
       .model = glm::rotate(glm::mat4(1.0F), time * glm::radians(90.0F), glm::vec3(0.0F, 0.0F, 1.0F)),
       // View matrix - glm::lookAt(eye, center, up)
-      .view =
-        glm::lookAt(glm::vec3(2.0F, 2.0F, 2.0F), glm::vec3(0.0F, 0.0F, 0.0F), glm::vec3(0.0F, 0.0F, 1.0F)),
+      .view = mView,
       // Projection matrix - glm::perspective(fov, aspect, near, far)
       .proj = glm::perspective(
         glm::radians(45.0F),
         static_cast<f32>(mSwapChainExtent.width) / static_cast<f32>(mSwapChainExtent.height),
         0.1F,
-        10.0F
+        100.0F
       )
     };