using OpenTK.Graphics.OpenGL4;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Voxel
{

    public class Triangle
    {
        private int _vao;
        private Shader _shader;

        public Triangle()
        {
            string vertexPath = "Shaders/shader.vert";
            string fragmentPath = "Shaders/shader.frag";
            _shader = new Shader(vertexPath, fragmentPath);

            float[] vertices =
            {
                -0.5f, -0.5f, 0.0f, //top
                0.5f, -0.5f, 0.0f, // bottom right
                0.0f, 0.5f, 0.0f // bottom left
            };

            _vao = GL.GenVertexArray();
            GL.BindVertexArray(_vao);

            int vbo = GL.GenBuffer();
            GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
            GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.StaticDraw);

            GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 3 * sizeof(float), 0);
            GL.EnableVertexAttribArray(0);

            _shader.Use();
        }

        public void Draw()
        {
            GL.BindVertexArray(_vao);
            GL.DrawArrays(PrimitiveType.Triangles, 0, 3);
        }
    }
}