using SharpGL.Shaders;
using SharpGL;
using System.Collections.Generic;
using SharpGL.VertexBuffers;

namespace Graphics.Objects {
    class gridBackground : iGraphicalObject {
        
        VertexBuffer vbo = new VertexBuffer();
        VertexBufferArray vao = new VertexBufferArray();
        ShaderProgram gridRender = new ShaderProgram();

        public gridBackground(renderCam context) {
            vao.Create(context.GL);
            vao.Bind(context.GL);
            gridRender.Create(context.GL, Shader.FromFile("default.vert"),
                Shader.FromFile("background.frag"), new Dictionary<uint, string>()
                { { 0, "position" } });
            vbo.Create(context.GL);
            vbo.Bind(context.GL);
            vbo.SetData(context.GL, 0, new float[] { -1.0f, -1.0f,
            1.0f, -1.0f,
            1.0f, 1.0f,
            -1.0f, 1.0f }, false, 2);
            vao.Unbind(context.GL);
        }

        const double realTileSize = 24.0f;
        public void render(renderCam context) {

            gridRender.Bind(context.GL);

            vao.Bind(context.GL);
            context.GL.DrawArrays(OpenGL.GL_QUADS, 0, 8);

            vao.Unbind(context.GL);
            gridRender.Unbind(context.GL);
        }
    }
}