use super::CodePiece;
use glsl::syntax::ShaderStage;
use glsl::syntax::TranslationUnit;
use glsl::transpiler::glsl::show_translation_unit;

use crate::impl_code_piece;

pub struct Trackball(pub ShaderStage);

impl Trackball {
    pub fn new() -> Self {
        let raw = glsl_quasiquote::glsl! {
            uniform mat4 trackball_view;
            uniform mat4 trackball_model;
            uniform mat4 trackball_projection;

            vec4 transform(vec4 position)
            {
                return trackball_projection
                       * trackball_view
                       * trackball_model
                       * position;
            }
        };

        Self(raw)
    }
}

impl_code_piece!(Trackball, 0);