From 3a2ae5044433aa3125c6d753d64d0a277b496c4d Mon Sep 17 00:00:00 2001
From: fredrikr79 <fredrikrobertsen7@gmail.com>
Date: Wed, 27 Aug 2025 21:23:52 +0200
Subject: [PATCH] trungle

---
 shaders/simple.frag |  4 +--
 shaders/simple.vert |  6 ++--
 src/main.rs         | 67 +++++++++++++++++++++++++++++----------------
 3 files changed, 49 insertions(+), 28 deletions(-)

diff --git a/shaders/simple.frag b/shaders/simple.frag
index 1029717..e9f180f 100644
--- a/shaders/simple.frag
+++ b/shaders/simple.frag
@@ -1,8 +1,8 @@
-#version 430 core
+#version 450 core
 
 out vec4 color;
 
 void main()
 {
     color = vec4(1.0f, 1.0f, 1.0f, 1.0f);
-}
\ No newline at end of file
+}
diff --git a/shaders/simple.vert b/shaders/simple.vert
index 446d1dc..0d3541b 100644
--- a/shaders/simple.vert
+++ b/shaders/simple.vert
@@ -1,8 +1,8 @@
-#version 430 core
+#version 450 core
 
-in vec3 position;
+in layout(location=0) vec3 position;
 
 void main()
 {
     gl_Position = vec4(position, 1.0f);
-}
\ No newline at end of file
+}
diff --git a/src/main.rs b/src/main.rs
index 8617821..169524b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -52,22 +52,43 @@ fn offset<T>(n: u32) -> *const c_void {
 // ptr::null()
 
 
-// == // Generate your VAO here
 unsafe fn create_vao(vertices: &Vec<f32>, indices: &Vec<u32>) -> u32 {
-    // Implement me!
+    // generate a VAO and bind it
+    let mut vao_id: u32 = 0;
+    gl::GenVertexArrays(1, &mut vao_id);
+    gl::BindVertexArray(vao_id);
 
-    // Also, feel free to delete comments :)
+    // generate a VBO and bind it
+    let mut vbo_id: u32 = 0;
+    gl::GenBuffers(1, &mut vbo_id);
+    gl::BindBuffer(gl::ARRAY_BUFFER, vbo_id);
 
-    // This should:
-    // * Generate a VAO and bind it
-    // * Generate a VBO and bind it
-    // * Fill it with data
-    // * Configure a VAP for the data and enable it
-    // * Generate a IBO and bind it
-    // * Fill it with data
-    // * Return the ID of the VAO
+    // fill it with data
+    gl::BufferData(
+        gl::ARRAY_BUFFER, 
+        byte_size_of_array(&vertices),
+        pointer_to_array(&vertices), 
+        gl::STATIC_DRAW
+    );
 
-    0
+    // configure a VAP for the data and enable it
+    gl::VertexAttribPointer(0, 3, gl::FLOAT, gl::FALSE, size_of::<f32>()*3, ptr::null());
+    gl::EnableVertexAttribArray(0);
+
+    // generate a IBO and bind it
+    let mut ibo_id: u32 = 0;
+    gl::GenBuffers(1, &mut ibo_id);
+    gl::BindBuffer(gl::ELEMENT_ARRAY_BUFFER, ibo_id);
+
+    // fill it with data
+    gl::BufferData(
+        gl::ELEMENT_ARRAY_BUFFER, 
+        byte_size_of_array(&indices), 
+        pointer_to_array(&indices), 
+        gl::STATIC_DRAW
+    );
+
+    return vao_id;
 }
 
 
@@ -130,9 +151,13 @@ fn main() {
             println!("GLSL\t: {}", util::get_gl_string(gl::SHADING_LANGUAGE_VERSION));
         }
 
-        // == // Set up your VAO around here
-
-        let my_vao = unsafe { 1337 };
+        let vertices = vec![
+            -0.6, -0.6, 0.0, 
+            0.6, -0.6, 0.0, 
+            0.0, 0.6, 0.0
+        ];
+        let indices = vec![ 0, 1, 2 ];
+        let vao_id = unsafe { create_vao(&vertices, &indices) };
 
 
         // == // Set up your shaders here
@@ -144,13 +169,13 @@ fn main() {
         // This snippet is not enough to do the exercise, and will need to be modified (outside
         // of just using the correct path), but it only needs to be called once
 
-        /*
         let simple_shader = unsafe {
             shader::ShaderBuilder::new()
-                .attach_file("./path/to/simple/shader.file")
+                .attach_file("./shaders/simple.vert")
+                .attach_file("./shaders/simple.frag")
                 .link()
         };
-        */
+        unsafe { simple_shader.activate(); };
 
 
         // Used to demonstrate keyboard handling for exercise 2.
@@ -215,11 +240,7 @@ fn main() {
                 gl::ClearColor(0.035, 0.046, 0.078, 1.0); // night sky
                 gl::Clear(gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT);
 
-
-                // == // Issue the necessary gl:: commands to draw your scene here
-
-
-
+                gl::DrawElements(gl::TRIANGLE_STRIP, 3, gl::UNSIGNED_INT, ptr::null());
             }
 
             // Display the new color buffer on the display