public void Flush()
{
// Return if there's nothing to draw
if (indexCount == 0)
{
return;
}
// Use the shader program
Program.Use(shader => {
// Bind the array buffer object
GL.BindVertexArray(abo);
// Upload vertices to the vertex buffer object
vbo.UploadData(dataArray: Vertices);
// Point the vertex buffer object to the right point
vbo.PointTo(shader.Attrib("v_pos"), 2, 0);
vbo.PointTo(shader.Attrib("v_tex"), 2, 3 * sizeof(float));
vbo.PointTo(shader.Attrib("v_col"), 4, 5 * sizeof(float));
// Bind the current texture to texture unit 0
CurrentTexture.Bind(TextureUnit.Texture0);
// Bind the index buffer object
ibo.Bind();
// Set the MVP uniform to the view projection matrix of the camera
shader["MVP"] = CurrentCamera.ViewProjectionMatrix;
// Draw the elements
GL.DrawElements(BeginMode.Triangles, ibo.Buffer.Count, DrawElementsType.UnsignedInt, 0);
// Unbind the array buffer object
GL.BindVertexArray(0);
Array.Clear(Vertices, 0, Vertices.Length);
// Reset the vertex and index counts
vertexCount = 0;
indexCount = 0;
});
}
