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use std::mem::size_of;
use crate::color::Color;
use crate::vector::{Vec2, Vec3};
#[derive(Debug, Clone, Default)]
#[repr(C)]
pub struct Vertex
{
pos: Vec3<f32>,
color: Color<f32>,
texture_coords: Vec2<f32>,
normal: Vec3<f32>,
}
#[derive(Debug, Default)]
pub struct Builder
{
pos: Option<Vec3<f32>>,
color: Option<Color<f32>>,
texture_coords: Vec2<f32>,
normal: Option<Vec3<f32>>,
}
impl Builder
{
#[must_use]
pub fn new() -> Self
{
Self::default()
}
#[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 texture_coords(mut self, texture_coords: Vec2<f32>) -> Self
{
self.texture_coords = texture_coords;
self
}
#[must_use]
pub fn normal(mut self, normal: Vec3<f32>) -> Self
{
self.normal = Some(normal);
self
}
#[must_use]
pub fn build(self) -> Option<Vertex>
{
let pos = self.pos?;
let color = self.color.unwrap_or_default();
let normal = self.normal.unwrap_or_default();
Some(Vertex {
pos,
color,
texture_coords: self.texture_coords,
normal,
})
}
}
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>(),
},
Attribute {
index: 2,
component_type: AttributeComponentType::Float,
component_cnt: AttributeComponentCnt::Two,
component_size: size_of::<f32>(),
},
Attribute {
index: 3,
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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