From 6dedf2c8289368bfd6969365113ba772fc7fb746 Mon Sep 17 00:00:00 2001
From: Miguel <m.i@gmx.at>
Date: Wed, 28 Apr 2021 23:39:13 +0200
Subject: initial commit

---
 Makefile    | 16 ++++++++++++
 example.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 Makefile
 create mode 100644 example.cpp

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..55391b4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,16 @@
+run: a.exe glfw3.dll
+	./a.exe
+
+glad.c:
+	cp /cygdrive/c/PROG/glad/src/glad.c .
+
+glfw3.dll:
+	cp /cygdrive/c/PROG/glfw-3.3.4.bin.WIN64/lib-static-ucrt/glfw3.dll .
+
+a.exe: example.cpp glad.c
+	g++ -I /cygdrive/C/PROG/glad/include/ -I /cygdrive/C/PROG/glfw-3.3.4.bin.WIN64/include/ -L /cygdrive/C/PROG/glfw-3.3.4.bin.WIN64/lib-static-ucrt/ -lglfw3 example.cpp glad.c
+
+clean: 
+	rm glfw3.dll
+	rm glad.c
+	rm a.exe
diff --git a/example.cpp b/example.cpp
new file mode 100644
index 0000000..97cf5b2
--- /dev/null
+++ b/example.cpp
@@ -0,0 +1,86 @@
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+#include <iostream>
+
+void framebuffer_size_callback(GLFWwindow* window, int width, int height);
+void processInput(GLFWwindow *window);
+
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
+int main()
+{
+    // glfw: initialize and configure
+    // ------------------------------
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+#ifdef __APPLE__
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+
+    // glfw window creation
+    // --------------------
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
+    if (window == NULL)
+    {
+        std::cout << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return -1;
+    }
+    glfwMakeContextCurrent(window);
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+    // glad: load all OpenGL function pointers
+    // ---------------------------------------
+    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+    {
+        std::cout << "Failed to initialize GLAD" << std::endl;
+        return -1;
+    }    
+
+    // render loop
+    // -----------
+    while (!glfwWindowShouldClose(window))
+    {
+        // input
+        // -----
+        processInput(window);
+
+        // render
+        // ------
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
+        // -------------------------------------------------------------------------------
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+
+    // glfw: terminate, clearing all previously allocated GLFW resources.
+    // ------------------------------------------------------------------
+    glfwTerminate();
+    return 0;
+}
+
+// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
+// ---------------------------------------------------------------------------------------------------------
+void processInput(GLFWwindow *window)
+{
+    if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, true);
+}
+
+// glfw: whenever the window size changed (by OS or user resize) this callback function executes
+// ---------------------------------------------------------------------------------------------
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    // make sure the viewport matches the new window dimensions; note that width and 
+    // height will be significantly larger than specified on retina displays.
+    glViewport(0, 0, width, height);
+}
-- 
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