use crate::wgpu;

#[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
#[repr(C)]
pub struct Vertex {
    pub pos: glam::Vec3,
    pub normal: glam::Vec3,
    pub tangent: glam::Vec3,
    pub uv: glam::Vec2,
}

impl Vertex {
    const ATTRIBS: [wgpu::VertexAttribute; 4] = wgpu::vertex_attr_array![
        //position
        0 => Float32x3,
        //normal
        1 => Float32x3,
        //tangent
        2 => Float32x3,
        //uv
        3 => Float32x2,
    ];

    pub fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
        wgpu::VertexBufferLayout {
            array_stride: std::mem::size_of::<Self>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Vertex,
            attributes: &Self::ATTRIBS,
        }
    }
}