Added sliders (incorrect numbers and lagy) but the sliders work

main.cpp

@@ -2,26 +2,31 @@
 #include <windows.h>
 #include <thread>
 #include <chrono>
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#include "imgui.h"
+#include "imgui_impl_glfw.h"
+#include "imgui_impl_opengl3.h"
 
+// Forward declarations
 void generateRandomColors(unsigned char& r, unsigned char& g, unsigned char& b);
+void sendDMXData(HANDLE hSerial, unsigned char* data, int length);
+void setupImGui(GLFWwindow* window);
+void renderImGui();
 
-void sendDMXData(HANDLE hSerial, unsigned char* data, int length) {
-    // Start with a DMX break condition
-    EscapeCommFunction(hSerial, SETBREAK);
-    std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Break duration
-    EscapeCommFunction(hSerial, CLRBREAK);
-    std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Mark-after-break duration
+// DMX data buffer
+const int num_channels = 512;
+unsigned char buffer[num_channels] = { 0 };
 
-    // Write the start code followed by the DMX data
-    DWORD bytesWritten;
-    unsigned char startCode = 0;
-    WriteFile(hSerial, &startCode, 1, &bytesWritten, NULL);
-    WriteFile(hSerial, data, length, &bytesWritten, NULL);
-}
+// Function to initialize OpenGL and create a window
+GLFWwindow* initOpenGL();
+
+// Serial port handle
+HANDLE hSerial;
 
 int main() {
     // Open the serial port
-    HANDLE hSerial = CreateFileA("\\\\.\\COM3", GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
+    hSerial = CreateFileA("\\\\.\\COM3", GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
     if (hSerial == INVALID_HANDLE_VALUE) {
         std::cerr << "Error opening COM3 port" << std::endl;
         return 1;
@@ -61,24 +66,54 @@ int main() {
         return 1;
     }
 
-    srand(static_cast<unsigned int>(time(nullptr)));
-
-    // DMX data (512 channels, all set to 255)
-    const int num_channels = 512;
-    unsigned char buffer[num_channels];
-    memset(buffer, 255, sizeof(buffer)); // Fill the buffer with 255
-
-    // Send DMX data in an infinite loop
-    while (true) {
-        // Generate and send random colors for channels 1, 2, and 3
-        generateRandomColors(buffer[0], buffer[1], buffer[2]);
-
-        // Send DMX data with random colors
-        sendDMXData(hSerial, buffer, num_channels);
-        std::this_thread::sleep_for(std::chrono::milliseconds(25)); // DMX refresh rate
+    // Initialize OpenGL and create a window
+    GLFWwindow* window = initOpenGL();
+    if (!window) {
+        CloseHandle(hSerial);
+        return 1;
     }
 
-    // Close the serial port
+    // Setup ImGui
+    setupImGui(window);
+
+    // Main loop
+    while (!glfwWindowShouldClose(window)) {
+        // Poll events
+        glfwPollEvents();
+
+        // Start the ImGui frame
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplGlfw_NewFrame();
+        ImGui::NewFrame();
+
+        // Render ImGui components
+        renderImGui();
+
+        // Update DMX data with values from sliders
+        sendDMXData(hSerial, buffer, num_channels);
+
+        // Rendering
+        ImGui::Render();
+        int display_w, display_h;
+        glfwGetFramebufferSize(window, &display_w, &display_h);
+        glViewport(0, 0, display_w, display_h);
+        glClearColor(0.45f, 0.55f, 0.60f, 1.00f);
+        glClear(GL_COLOR_BUFFER_BIT);
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
+        // Swap buffers
+        glfwSwapBuffers(window);
+
+        // Simulate DMX refresh rate
+        std::this_thread::sleep_for(std::chrono::milliseconds(25));
+    }
+
+    // Cleanup
+    ImGui_ImplOpenGL3_Shutdown();
+    ImGui_ImplGlfw_Shutdown();
+    ImGui::DestroyContext();
+    glfwDestroyWindow(window);
+    glfwTerminate();
     CloseHandle(hSerial);
 
     return 0;
@@ -88,4 +123,74 @@ void generateRandomColors(unsigned char& r, unsigned char& g, unsigned char& b)
     r = rand() % 256;
     g = rand() % 256;
     b = rand() % 256;
-}
+}
+
+void sendDMXData(HANDLE hSerial, unsigned char* data, int length) {
+    // Start with a DMX break condition
+    EscapeCommFunction(hSerial, SETBREAK);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Break duration
+    EscapeCommFunction(hSerial, CLRBREAK);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Mark-after-break duration
+
+    // Write the start code followed by the DMX data
+    DWORD bytesWritten;
+    unsigned char startCode = 0;
+    WriteFile(hSerial, &startCode, 1, &bytesWritten, NULL);
+    WriteFile(hSerial, data, length, &bytesWritten, NULL);
+}
+
+GLFWwindow* initOpenGL() {
+    // Initialize GLFW
+    if (!glfwInit()) {
+        std::cerr << "Failed to initialize GLFW" << std::endl;
+        return nullptr;
+    }
+
+    // Create a windowed mode window and its OpenGL context
+    GLFWwindow* window = glfwCreateWindow(1280, 720, "DMX Controller", NULL, NULL);
+    if (!window) {
+        std::cerr << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return nullptr;
+    }
+
+    // Make the window's context current
+    glfwMakeContextCurrent(window);
+    glfwSwapInterval(1); // Enable vsync
+
+    // Initialize GLEW
+    if (glewInit() != GLEW_OK) {
+        std::cerr << "Failed to initialize GLEW" << std::endl;
+        glfwDestroyWindow(window);
+        glfwTerminate();
+        return nullptr;
+    }
+
+    return window;
+}
+
+void setupImGui(GLFWwindow* window) {
+    // Setup ImGui context
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO(); (void)io;
+
+    // Setup ImGui style
+    ImGui::StyleColorsDark();
+
+    // Setup Platform/Renderer bindings
+    ImGui_ImplGlfw_InitForOpenGL(window, true);
+    ImGui_ImplOpenGL3_Init("#version 130");
+}
+
+void renderImGui() {
+    // Create a window
+    ImGui::Begin("DMX Controller");
+
+    // Create sliders for the first three DMX channels
+    ImGui::SliderInt("Channel 1", (int*)&buffer[0], 0, 255);
+    ImGui::SliderInt("Channel 2", (int*)&buffer[1], 0, 255);
+    ImGui::SliderInt("Channel 3", (int*)&buffer[2], 0, 255);
+
+    ImGui::End();
+}