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use std::mem::size_of;
use crate::color::Color;
use crate::vector::Vec3;
#[derive(Debug)]
#[repr(C)]
pub struct Vertex
{
pos: Vec3<f32>,
color: Color<f32>,
}
#[derive(Debug, Default)]
pub struct Builder
{
pos: Option<Vec3<f32>>,
color: Option<Color<f32>>,
}
impl Builder
{
#[must_use]
pub fn new() -> Self
{
Self { pos: None, color: None }
}
#[must_use]
pub fn pos(mut self, pos: Vec3<f32>) -> Self
{
self.pos = Some(pos);
self
}
#[must_use]
pub fn color(mut self, color: Color<f32>) -> Self
{
self.color = Some(color);
self
}
#[must_use]
pub fn build(self) -> Option<Vertex>
{
let pos = self.pos?;
let color = self.color?;
Some(Vertex { pos, color })
}
}
impl Vertex
{
pub(crate) fn attrs() -> &'static [Attribute]
{
&[
Attribute {
index: 0,
component_type: AttributeComponentType::Float,
component_cnt: AttributeComponentCnt::Three,
component_size: size_of::<f32>(),
},
Attribute {
index: 1,
component_type: AttributeComponentType::Float,
component_cnt: AttributeComponentCnt::Three,
component_size: size_of::<f32>(),
},
]
}
}
pub(crate) struct Attribute
{
pub(crate) index: usize,
pub(crate) component_type: AttributeComponentType,
pub(crate) component_cnt: AttributeComponentCnt,
pub(crate) component_size: usize,
}
pub(crate) enum AttributeComponentType
{
Float,
}
#[derive(Debug, Clone, Copy)]
#[repr(u32)]
#[allow(dead_code)]
pub(crate) enum AttributeComponentCnt
{
One = 1,
Two = 2,
Three = 3,
Four = 4,
}
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