From ef1786df2218f813680f3b06367edd6dceb4006a Mon Sep 17 00:00:00 2001
From: Nickiel12 <nicholasyoungsumner@gmail.com>
Date: Mon, 7 Oct 2024 09:37:48 -0700
Subject: [PATCH] got vertex buffers running

---
 src/main.zig | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/main.zig b/src/main.zig
index c2ebfb4..351557e 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -49,15 +49,36 @@ pub fn main() void {
 
     // callback function returned?
     _ = gl.glfwSetFramebufferSizeCallback(window, &framebuffer_resize_callback);
+
+    const verticies: [3][3]f32 = .{ .{-0.5, -0.5, 0.0}, .{0.5, -0.5, 0.0}, .{0.0, 0.5, 0.0} };
+    var vbo: gl.GLuint = undefined;
+    gl.glad_glGenBuffers.?(1, &vbo);
+    std.debug.print("buffer id: '{d}'\n", .{ vbo });
+    gl.glad_glBindBuffer.?(gl.GL_ARRAY_BUFFER, vbo);
+    gl.glBufferData(gl.GL_ARRAY_BUFFER, 4 * 3 * @sizeOf(f32), @ptrCast(&verticies), gl.GL_STATIC_DRAW);
     
     while(gl.glfwWindowShouldClose(window) == 0)
     {
-        gl.glfwSwapBuffers(window);
         gl.glfwPollEvents();    
+        handle_input(window.?);
+
+        gl.glClearColor(0.2, 0.3, 0.4, 0.5); // state setting, followed by state using
+        gl.glClear(gl.GL_COLOR_BUFFER_BIT); // color buffer, depth buffer, and stencil buffer
+
+        // This swaps the "displayed" buffer with the "rendering" buffer
+        gl.glfwSwapBuffers(window);
     }
 
+    gl.glfwTerminate();
+
 }
 
 export fn framebuffer_resize_callback(_: ?*gl.GLFWwindow, width: c_int, height: c_int) callconv(.C) void {
     gl.glViewport(0, 0, width, height);
 }
+
+fn handle_input(window: *gl.GLFWwindow) void {
+    if (gl.glfwGetKey(window, gl.GLFW_KEY_ESCAPE) == gl.GLFW_PRESS) {
+        gl.glfwSetWindowShouldClose(window, 1);
+    }
+}