From 0373b7581eaa37abfcd1e354db509036cf350b1a Mon Sep 17 00:00:00 2001
From: Nathan Chapman <nathan@windmillapps.org>
Date: Sun, 13 Jul 2025 13:09:57 -0600
Subject: [PATCH] Add more ui

---
 src/main.cpp           |  2 +-
 src/render_data.h      |  2 ++
 src/renderer.cpp       |  4 ++--
 src/renderer.h         |  1 -
 src/user_interface.cpp | 29 +++++++++++++++++++++++++++++
 src/window.cpp         |  4 ++--
 src/window.h           |  2 +-
 7 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index bde02ac..5083e3d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4,7 +4,7 @@
 int main(int argc, char *argv[]) {
     Window window;
 
-    if (!init(&window, 640, 480, "OpenGL Renderer")) {
+    if (!init_window(&window, 640, 480, "OpenGL Renderer")) {
         log(1, "%s error: Window init error\n", __FUNCTION__);
         return -1;
     }
diff --git a/src/render_data.h b/src/render_data.h
index 3cb54a9..a996be9 100644
--- a/src/render_data.h
+++ b/src/render_data.h
@@ -22,4 +22,6 @@ struct Render_Data {
   s32 triangle_count = 0;
   f32 frame_time = 0.0f;
   f32 user_interface_generate_time = 0.0f;
+  bool use_alt_shader = false;
+  s32 field_of_view = 90;
 };
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 2d7960f..8cece55 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -111,12 +111,12 @@ void draw_renderer(Renderer *renderer) {
   Vector3 camera_look_at_position = Vector3(0.0f, 0.0f, 0.0f);
   Vector3 camera_up_vector = Vector3(0.0f, 1.0f, 0.0f);
 
-  renderer->projection_matrix = glm::perspective(glm::radians(90.0f), static_cast<f32>(renderer->render_data.width) / static_cast<f32>(renderer->render_data.height), 0.1f, 100.0f);
+  renderer->projection_matrix = glm::perspective(glm::radians(static_cast<f32>(renderer->render_data.field_of_view)), static_cast<f32>(renderer->render_data.width) / static_cast<f32>(renderer->render_data.height), 0.1f, 10.0f);
 
   f32 dt = glfwGetTime();
   Matrix4 model = Matrix4(1.0);
 
-  if (!renderer->use_alt_shader) {
+  if (!renderer->render_data.use_alt_shader) {
     use_shader(&renderer->shader);
     model = glm::rotate(Matrix4(1.0f), dt, Vector3(0.0f, 0.0f, 1.0f));
   } else {
diff --git a/src/renderer.h b/src/renderer.h
index 0bb839c..8fccba3 100644
--- a/src/renderer.h
+++ b/src/renderer.h
@@ -47,7 +47,6 @@ struct Renderer {
   Uniform_Buffer uniform_buffer;
   Texture texture;
   Mesh mesh;
-  bool use_alt_shader = false;
   Matrix4 view_matrix = Matrix4(1.0f);
   Matrix4 projection_matrix = Matrix4(1.0f);
   User_Interface user_interface;
diff --git a/src/user_interface.cpp b/src/user_interface.cpp
index ca77b37..00b4709 100644
--- a/src/user_interface.cpp
+++ b/src/user_interface.cpp
@@ -49,6 +49,35 @@ void create_user_interface_frame(User_Interface *user_interface, Render_Data *re
   ImGui::Text("ImGui Window Position:");
   ImGui::SameLine();
   ImGui::Text(img_window_position.c_str());
+
+  // Checkbox
+  static bool checkbox_is_checked = false;
+  ImGui::Checkbox("Check me", &checkbox_is_checked);
+
+  if (checkbox_is_checked) {
+    ImGui::SameLine();
+    ImGui::PushStyleColor(ImGuiCol_Text, IM_COL32(0, 255, 0, 255));
+    ImGui::Text("Yes");
+    ImGui::PopStyleColor();
+  }
+
+  // Alt shader toggler
+  if (ImGui::Button("Toggle shader")) {
+    render_data->use_alt_shader = !render_data->use_alt_shader;
+  }
+
+  ImGui::SameLine();
+  if (!render_data->use_alt_shader) {
+    ImGui::Text("Basic shader");
+  } else {
+    ImGui::Text("Alt shader");
+  }
+
+  // Field of view slider
+  ImGui::Text("Field of view");
+  ImGui::SameLine();
+  ImGui::SliderInt("##FOV", &render_data->field_of_view, 40, 150);
+
   ImGui::End();
 }
 
diff --git a/src/window.cpp b/src/window.cpp
index 6245ab2..a330580 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1,7 +1,7 @@
 #include "window.h"
 #include "logger.h"
 
-bool init(Window *window, u32 width, u32 height, string title) {
+bool init_window(Window *window, u32 width, u32 height, string title) {
   glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_WAYLAND);
 
   if (!glfwInit()) {
@@ -85,7 +85,7 @@ void handle_key_events(GLFWwindow *gl_window, s32 key, s32 scancode, s32 action,
   Window *window = static_cast<Window *>(glfwGetWindowUserPointer(gl_window));
 
   if (glfwGetKey(window->glfw_window, GLFW_KEY_SPACE) == GLFW_PRESS) {
-    window->renderer->use_alt_shader = !window->renderer->use_alt_shader;
+    window->renderer->render_data.use_alt_shader = !window->renderer->render_data.use_alt_shader;
   }
 }
 
diff --git a/src/window.h b/src/window.h
index be575b0..9f974e4 100644
--- a/src/window.h
+++ b/src/window.h
@@ -9,7 +9,7 @@ struct Window {
     Model* model = nullptr;
 };
 
-bool init(Window *window, u32 width, u32 height, string title);
+bool init_window(Window *window, u32 width, u32 height, string title);
 void main_loop(Window *window);
 void cleanup(Window *window);
 void handle_close(GLFWwindow *gl_window);