From 2385167e872d5f5eaf34d6a61ca4a6fded11956c Mon Sep 17 00:00:00 2001
From: Dendy <dendy@fai.st>
Date: Fri, 22 Jul 2022 11:48:44 +0200
Subject: [PATCH] Draw triangle

---
 src/main.zig | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/main.zig b/src/main.zig
index fd8cc79..5ae2fc0 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -27,6 +27,19 @@ pub fn main() !void {
     const ctx = try sdl.gl.createContext(window);
     defer sdl.gl.deleteContext(ctx);
 
+    var vertex_array = gl.VertexArray.gen();
+    vertex_array.bind();
+
+    const vertex_buffer = [_]f32{
+        -1.0, -1.0, 0.0,
+        1.0, -1.0, 0.0,
+        0.0, 1.0, 0.0,
+    };
+
+    const buffer = gl.Buffer.gen();
+    buffer.bind(.array_buffer);
+    buffer.data(f32, &vertex_buffer, .static_draw);
+
     //var renderer = SDL.SDL_CreateRenderer(window, -1, SDL.SDL_RENDERER_PRESENTVSYNC | SDL.SDL_RENDERER_ACCELERATED) orelse return;
     //defer _ = SDL.SDL_DestroyRenderer(renderer);
 
@@ -48,6 +61,13 @@ pub fn main() !void {
 
         gl.clear(.{});
 
+        gl.enableVertexAttribArray(0);
+        buffer.bind(.array_buffer);
+
+        gl.vertexAttribPointer(0, 3, .float, false, 0, 0);
+        gl.drawArrays(.triangles, 0, 3);
+        gl.disableVertexAttribArray(0);
+
         sdl.gl.swapWindow(window);
 
         //_ = SDL.SDL_SetRenderDrawColor(renderer, 231, 247, 255, 0xFF);