spans now good (other than direction) + refactor

src/base/frame.rs

@@ -0,0 +1,45 @@
+use crate::{Painter, UINum, UIRegion, Widget, WidgetId};
+
+pub struct Regioned {
+    pub region: UIRegion,
+    pub inner: WidgetId,
+}
+
+impl Widget for Regioned {
+    fn draw(&self, painter: &mut Painter) {
+        painter.region.select(&self.region);
+        painter.draw(&self.inner);
+    }
+}
+
+pub struct Padding {
+    left: f32,
+    right: f32,
+    top: f32,
+    bottom: f32,
+}
+
+impl Padding {
+    pub fn uniform(amt: f32) -> Self {
+        Self {
+            left: amt,
+            right: amt,
+            top: amt,
+            bottom: amt,
+        }
+    }
+    pub fn region(&self) -> UIRegion {
+        let mut region = UIRegion::full();
+        region.top_left.offset.x += self.left;
+        region.top_left.offset.y += self.top;
+        region.bot_right.offset.x -= self.right;
+        region.bot_right.offset.y -= self.bottom;
+        region
+    }
+}
+
+impl<T: UINum> From<T> for Padding {
+    fn from(amt: T) -> Self {
+        Self::uniform(amt.to_f32())
+    }
+}

src/base/mod.rs

@@ -1,171 +1,11 @@
-use std::ops::Range;
+mod frame;
+mod num;
+mod rect;
+mod span;
+mod trait_fns;
 
-use crate::{
+pub use frame::*;
-    UIColor, Widget, WidgetArrLike, WidgetFn, WidgetId, WidgetLike,
+pub use num::*;
-    primitive::{Axis, Painter, RoundedRectData, UIRegion, Vec2},
+pub use rect::*;
-};
+pub use span::*;
-
+pub use trait_fns::*;
-#[derive(Clone, Copy)]
-pub struct RoundedRect {
-    pub color: UIColor,
-    pub radius: f32,
-    pub thickness: f32,
-    pub inner_radius: f32,
-}
-
-impl RoundedRect {
-    pub fn color(mut self, color: UIColor) -> Self {
-        self.color = color;
-        self
-    }
-}
-
-impl Widget for RoundedRect {
-    fn draw(&self, painter: &mut Painter) {
-        painter.write(RoundedRectData {
-            color: self.color,
-            radius: self.radius,
-            thickness: self.thickness,
-            inner_radius: self.inner_radius,
-        });
-    }
-}
-
-pub struct Span {
-    pub elements: Vec<(Range<f32>, WidgetId)>,
-    pub axis: Axis,
-}
-
-impl Widget for Span {
-    fn draw(&self, painter: &mut Painter) {
-        for (span, child) in &self.elements {
-            let mut sub_region = UIRegion::full();
-            let view = sub_region.axis_mut(self.axis);
-            *view.top_left.anchor = span.start;
-            *view.bot_right.anchor = span.end;
-            painter.draw_within(child, sub_region);
-        }
-    }
-}
-
-impl Span {
-    pub fn proportioned<const LEN: usize>(
-        axis: Axis,
-        ratios: [impl UINum; LEN],
-        elements: [WidgetId; LEN],
-    ) -> Self {
-        let ratios = ratios.map(|r| r.to_f32());
-        let total: f32 = ratios.iter().sum();
-        let mut start = -1.0;
-        Self {
-            elements: elements
-                .into_iter()
-                .zip(ratios)
-                .map(|(e, r)| {
-                    let end = start + (r / total) * 2.0;
-                    let res = (start..end, e);
-                    start = end;
-                    res
-                })
-                .collect(),
-            axis,
-        }
-    }
-}
-
-pub struct Regioned {
-    region: UIRegion,
-    inner: WidgetId,
-}
-
-impl Widget for Regioned {
-    fn draw(&self, painter: &mut Painter) {
-        painter.region.select(&self.region);
-        painter.draw(&self.inner);
-    }
-}
-
-pub struct Padding {
-    left: f32,
-    right: f32,
-    top: f32,
-    bottom: f32,
-}
-
-impl Padding {
-    pub fn uniform(amt: f32) -> Self {
-        Self {
-            left: amt,
-            right: amt,
-            top: amt,
-            bottom: amt,
-        }
-    }
-    pub fn region(&self) -> UIRegion {
-        let mut region = UIRegion::full();
-        region.top_left.offset.x += self.left;
-        region.top_left.offset.y += self.top;
-        region.bot_right.offset.x -= self.right;
-        region.bot_right.offset.y -= self.bottom;
-        region
-    }
-}
-
-impl<T: UINum> From<T> for Padding {
-    fn from(amt: T) -> Self {
-        Self::uniform(amt.to_f32())
-    }
-}
-
-pub trait WidgetUtil {
-    fn pad(self, padding: impl Into<Padding>) -> impl WidgetLike<Widget = Regioned>;
-    fn center(self, size: impl Into<Vec2>) -> impl WidgetLike<Widget = Regioned>;
-}
-
-impl<W: WidgetLike> WidgetUtil for W {
-    fn pad(self, padding: impl Into<Padding>) -> impl WidgetLike<Widget = Regioned> {
-        WidgetFn(|ui| Regioned {
-            region: padding.into().region(),
-            inner: self.add(ui).erase_type(),
-        })
-    }
-
-    fn center(self, size: impl Into<Vec2>) -> impl WidgetLike<Widget = Regioned> {
-        WidgetFn(|ui| Regioned {
-            region: UIRegion::center(size.into()),
-            inner: self.add(ui).erase_type(),
-        })
-    }
-}
-
-pub trait WidgetArrUtil<const LEN: usize> {
-    fn span(self, axis: Axis, ratios: [impl UINum; LEN]) -> impl WidgetLike<Widget = Span>;
-}
-
-impl<const LEN: usize, Wa: WidgetArrLike<LEN>> WidgetArrUtil<LEN> for Wa {
-    fn span(self, axis: Axis, ratios: [impl UINum; LEN]) -> impl WidgetLike<Widget = Span> {
-        WidgetFn(move |ui| Span::proportioned(axis, ratios, self.ui(ui).arr))
-    }
-}
-
-pub trait UINum {
-    fn to_f32(self) -> f32;
-}
-
-impl UINum for f32 {
-    fn to_f32(self) -> f32 {
-        self
-    }
-}
-
-impl UINum for u32 {
-    fn to_f32(self) -> f32 {
-        self as f32
-    }
-}
-
-impl UINum for i32 {
-    fn to_f32(self) -> f32 {
-        self as f32
-    }
-}

src/base/num.rs

@@ -0,0 +1,50 @@
+pub trait UINum {
+    fn to_f32(self) -> f32;
+}
+
+impl UINum for f32 {
+    fn to_f32(self) -> f32 {
+        self
+    }
+}
+
+impl UINum for u32 {
+    fn to_f32(self) -> f32 {
+        self as f32
+    }
+}
+
+impl UINum for i32 {
+    fn to_f32(self) -> f32 {
+        self as f32
+    }
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub enum Axis {
+    X,
+    Y,
+}
+
+#[derive(Clone, Copy, Eq, PartialEq)]
+pub struct Dir {
+    pub axis: Axis,
+    pub sign: Sign,
+}
+
+impl Dir {
+    pub const fn new(axis: Axis, dir: Sign) -> Self {
+        Self { axis, sign: dir }
+    }
+
+    pub const LEFT: Self = Self::new(Axis::X, Sign::Neg);
+    pub const RIGHT: Self = Self::new(Axis::X, Sign::Pos);
+    pub const UP: Self = Self::new(Axis::Y, Sign::Neg);
+    pub const DOWN: Self = Self::new(Axis::Y, Sign::Pos);
+}
+
+#[derive(Clone, Copy, Eq, PartialEq)]
+pub enum Sign {
+    Neg,
+    Pos,
+}

src/base/rect.rs

@@ -0,0 +1,27 @@
+use crate::{Painter, UIColor, Widget, primitive::RoundedRectData};
+
+#[derive(Clone, Copy)]
+pub struct Rect {
+    pub color: UIColor,
+    pub radius: f32,
+    pub thickness: f32,
+    pub inner_radius: f32,
+}
+
+impl Rect {
+    pub fn color(mut self, color: UIColor) -> Self {
+        self.color = color;
+        self
+    }
+}
+
+impl Widget for Rect {
+    fn draw(&self, painter: &mut Painter) {
+        painter.write(RoundedRectData {
+            color: self.color,
+            radius: self.radius,
+            thickness: self.thickness,
+            inner_radius: self.inner_radius,
+        });
+    }
+}

src/base/span.rs

@@ -0,0 +1,89 @@
+use crate::{Dir, Painter, UINum, UIRegion, UIScalar, Widget, WidgetId};
+
+pub struct Span {
+    pub children: Vec<(WidgetId, SpanLen)>,
+    pub dir: Dir,
+}
+
+impl Widget for Span {
+    fn draw(&self, painter: &mut Painter) {
+        let total = self.sums();
+        let mut start = UIScalar::min();
+        for (child, length) in &self.children {
+            let mut child_region = UIRegion::full();
+            let mut axis = child_region.axis_mut(self.dir.axis);
+            axis.top_left.set(start);
+            match *length {
+                SpanLen::Fixed(offset) => {
+                    start.offset += offset;
+                    *axis.bot_right.offset = start.offset;
+                    *axis.bot_right.anchor = *axis.top_left.anchor;
+                }
+                SpanLen::Ratio(ratio) => {
+                    let offset = UIScalar::new(total.relative, total.fixed);
+                    let rel_end = UIScalar::from_anchor(ratio / total.ratio);
+                    start = rel_end.within(start, (UIScalar::max() + start) - offset);
+                    axis.bot_right.set(start);
+                }
+                SpanLen::Relative(rel) => {
+                    start.anchor += rel;
+                    axis.bot_right.set(start);
+                }
+            }
+            painter.draw_within(child, child_region);
+        }
+    }
+}
+
+#[derive(Default)]
+pub struct SpanLenSums {
+    pub fixed: f32,
+    pub ratio: f32,
+    pub relative: f32,
+}
+
+impl Span {
+    pub fn sums(&self) -> SpanLenSums {
+        self.lengths().fold(SpanLenSums::default(), |mut s, l| {
+            match l {
+                SpanLen::Fixed(v) => s.fixed += v,
+                SpanLen::Ratio(v) => s.ratio += v,
+                SpanLen::Relative(v) => s.relative += v,
+            }
+            s
+        })
+    }
+    pub fn lengths(&self) -> impl ExactSizeIterator<Item = &SpanLen> {
+        self.children.iter().map(|(_, s)| s)
+    }
+}
+
+#[derive(Clone, Copy)]
+pub enum SpanLen {
+    /// exact (non dynamic) size
+    Fixed(f32),
+    /// relative to remaining free space and other ratios
+    /// eg. 1 and 2 would take up 1/3 and 2/3 of the remaining space (after others)
+    Ratio(f32),
+    /// relative to the total space
+    /// eg. 0.5 means 1/2 of the total space
+    Relative(f32),
+}
+
+pub fn fixed<N: UINum>(x: N) -> SpanLen {
+    SpanLen::Fixed(x.to_f32())
+}
+
+pub fn ratio<N: UINum>(x: N) -> SpanLen {
+    SpanLen::Ratio(x.to_f32())
+}
+
+pub fn rel<N: UINum>(x: N) -> SpanLen {
+    SpanLen::Relative(x.to_f32())
+}
+
+impl<N: UINum> From<N> for SpanLen {
+    fn from(value: N) -> Self {
+        Self::Ratio(value.to_f32())
+    }
+}

src/base/trait_fns.rs

@@ -0,0 +1,37 @@
+use super::*;
+use crate::{UIRegion, Vec2, WidgetArrLike, WidgetFn, WidgetLike};
+
+pub trait WidgetUtil {
+    fn pad(self, padding: impl Into<Padding>) -> impl WidgetLike<Widget = Regioned>;
+    fn center(self, size: impl Into<Vec2>) -> impl WidgetLike<Widget = Regioned>;
+}
+
+impl<W: WidgetLike> WidgetUtil for W {
+    fn pad(self, padding: impl Into<Padding>) -> impl WidgetLike<Widget = Regioned> {
+        WidgetFn(|ui| Regioned {
+            region: padding.into().region(),
+            inner: self.add(ui).erase_type(),
+        })
+    }
+
+    fn center(self, size: impl Into<Vec2>) -> impl WidgetLike<Widget = Regioned> {
+        WidgetFn(|ui| Regioned {
+            region: UIRegion::center(size.into()),
+            inner: self.add(ui).erase_type(),
+        })
+    }
+}
+
+pub trait WidgetArrUtil<const LEN: usize> {
+    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> impl WidgetLike<Widget = Span>;
+}
+
+impl<const LEN: usize, Wa: WidgetArrLike<LEN>> WidgetArrUtil<LEN> for Wa {
+    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> impl WidgetLike<Widget = Span> {
+        let lengths = lengths.map(Into::into);
+        WidgetFn(move |ui| Span {
+            dir,
+            children: self.ui(ui).arr.into_iter().zip(lengths).collect(),
+        })
+    }
+}

src/layout/mod.rs

@@ -1,8 +1,15 @@
+mod color;
+mod painter;
+mod region;
 mod ui;
+mod vec2;
 mod widget;
 
+pub use color::*;
+pub use region::*;
 pub use ui::*;
+pub use vec2::*;
 pub use widget::*;
+pub use painter::*;
 
-use crate::primitive::Color;
 pub type UIColor = Color<u8>;

src/layout/painter.rs

@@ -1,21 +1,7 @@
-mod color;
+use crate::{
-mod def;
+    UIRegion, WidgetId, Widgets,
-mod format;
+    primitive::{PrimitiveData, PrimitiveInstance, Primitives},
-mod vec2;
+};
-
-pub use color::*;
-pub use def::*;
-pub use format::*;
-pub use vec2::*;
-
-use crate::{render::data::PrimitiveInstance, WidgetId, Widgets};
-use bytemuck::Pod;
-
-#[derive(Default)]
-pub struct Primitives {
-    pub instances: Vec<PrimitiveInstance>,
-    pub data: Vec<u32>,
-}
 
 pub struct Painter<'a> {
     nodes: &'a Widgets,
@@ -23,11 +9,6 @@ pub struct Painter<'a> {
     pub region: UIRegion,
 }
 
-/// NOTE: Self must have at least u32 alignment
-pub trait PrimitiveData: Pod {
-    const DISCRIM: u32;
-}
-
 impl<'a> Painter<'a> {
     pub fn new(nodes: &'a Widgets) -> Self {
         Self {

src/layout/region.rs

@@ -1,4 +1,8 @@
-use crate::primitive::{Vec2, vec2::point};
+use crate::{
+    Axis, Vec2,
+    layout::vec2,
+    util::{F32Util, impl_op},
+};
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable, Default)]
@@ -10,17 +14,17 @@ pub struct UIPos {
 impl UIPos {
     pub const fn anchor_offset(anchor_x: f32, anchor_y: f32, offset_x: f32, offset_y: f32) -> Self {
         Self {
-            anchor: point(anchor_x, anchor_y),
+            anchor: vec2(anchor_x, anchor_y),
-            offset: point(offset_x, offset_y),
+            offset: vec2(offset_x, offset_y),
         }
     }
 
     pub const fn center() -> Self {
-        Self::anchor_offset(0.0, 0.0, 0.0, 0.0)
+        Self::anchor_offset(0.5, 0.5, 0.0, 0.0)
     }
 
     pub const fn top_left() -> Self {
-        Self::anchor_offset(-1.0, -1.0, 0.0, 0.0)
+        Self::anchor_offset(0.0, 0.0, 0.0, 0.0)
     }
 
     pub const fn bottom_right() -> Self {
@@ -33,23 +37,23 @@ impl UIPos {
     }
 
     pub const fn within(&self, region: &UIRegion) -> UIPos {
-        let lerp = self.anchor_01();
+        let anchor = self
-        let anchor = region.top_left.anchor.lerp(region.bot_right.anchor, lerp);
+            .anchor
-        let offset = self.offset + region.top_left.offset.lerp(region.bot_right.offset, lerp);
+            .lerp(region.top_left.anchor, region.bot_right.anchor);
+        let offset = self.offset;
+        // + self
+        //     .anchor
+        //     .lerp(region.top_left.offset, region.bot_right.offset);
         UIPos { anchor, offset }
     }
 
-    pub const fn anchor_01(&self) -> Vec2 {
+    pub fn axis_mut(&mut self, axis: Axis) -> UIScalarView<'_> {
-        (self.anchor + 1.0) / 2.0
-    }
-
-    pub fn axis_mut(&mut self, axis: Axis) -> UIPosAxisView<'_> {
         match axis {
-            Axis::X => UIPosAxisView {
+            Axis::X => UIScalarView {
                 anchor: &mut self.anchor.x,
                 offset: &mut self.offset.x,
             },
-            Axis::Y => UIPosAxisView {
+            Axis::Y => UIScalarView {
                 anchor: &mut self.anchor.y,
                 offset: &mut self.offset.y,
             },
@@ -57,13 +61,45 @@ impl UIPos {
     }
 }
 
-pub struct UIPosAxisView<'a> {
+#[derive(Clone, Copy, Debug)]
-    pub anchor: &'a mut f32,
+pub struct UIScalar {
-    pub offset: &'a mut f32,
+    pub anchor: f32,
+    pub offset: f32,
+}
+
+impl_op!(UIScalar Add add; anchor offset);
+impl_op!(UIScalar Sub sub; anchor offset);
+
+impl UIScalar {
+    pub fn new(anchor: f32, offset: f32) -> Self {
+        Self { anchor, offset }
+    }
+    pub fn min() -> Self {
+        Self::new(0.0, 0.0)
+    }
+
+    pub fn max() -> Self {
+        Self::new(1.0, 0.0)
+    }
+
+    pub fn from_anchor(anchor: f32) -> Self {
+        Self::new(anchor, 0.0)
+    }
+
+    pub fn offset(mut self, amt: f32) -> Self {
+        self.offset += amt;
+        self
+    }
+
+    pub fn within(&self, start: UIScalar, end: UIScalar) -> Self {
+        let anchor = self.anchor.lerp(start.anchor, end.anchor);
+        let offset = self.offset + self.anchor.lerp(start.offset, end.offset);
+        Self { anchor, offset }
+    }
 }
 
 #[repr(C)]
-#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+#[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
 pub struct UIRegion {
     pub top_left: UIPos,
     pub bot_right: UIPos,
@@ -100,12 +136,24 @@ impl UIRegion {
 }
 
 pub struct UIRegionAxisView<'a> {
-    pub top_left: UIPosAxisView<'a>,
+    pub top_left: UIScalarView<'a>,
-    pub bot_right: UIPosAxisView<'a>,
+    pub bot_right: UIScalarView<'a>,
 }
 
-#[derive(Copy, Clone)]
+pub struct UIScalarView<'a> {
-pub enum Axis {
+    pub anchor: &'a mut f32,
-    X,
+    pub offset: &'a mut f32,
-    Y,
+}
+
+impl UIScalarView<'_> {
+    pub fn set(&mut self, scalar: UIScalar) {
+        *self.anchor = scalar.anchor;
+        *self.offset = scalar.offset;
+    }
+    pub fn get(self) -> UIScalar {
+        UIScalar {
+            anchor: *self.anchor,
+            offset: *self.offset,
+        }
+    }
 }

src/layout/ui.rs

@@ -1,7 +1,7 @@
 use crate::{
-    primitive::{Painter, Primitives},
+    HashMap, Painter, Widget, WidgetId, WidgetLike, WidgetRef,
-    util::{IDTracker, ID},
+    primitive::Primitives,
-    HashMap, Widget, WidgetId, WidgetLike, WidgetRef,
+    util::{ID, IDTracker},
 };
 use std::{
     any::{Any, TypeId},

src/layout/vec2.rs

@@ -0,0 +1,59 @@
+use crate::util::{F32Util, impl_op};
+use std::ops::*;
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy, PartialEq, Default, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct Vec2 {
+    pub x: f32,
+    pub y: f32,
+}
+
+pub const fn vec2(x: f32, y: f32) -> Vec2 {
+    Vec2::new(x, y)
+}
+
+impl Vec2 {
+    pub const ZERO: Self = Self::new(0.0, 0.0);
+    pub const ONE: Self = Self::new(1.0, 1.0);
+
+    pub const fn new(x: f32, y: f32) -> Self {
+        Self { x, y }
+    }
+
+    pub const fn lerp(self, from: impl const Into<Self>, to: impl const Into<Self>) -> Self {
+        let from = from.into();
+        let to = to.into();
+        Self {
+            x: self.x.lerp(from.x, to.x),
+            y: self.y.lerp(from.y, to.y),
+        }
+    }
+}
+
+impl const From<f32> for Vec2 {
+    fn from(v: f32) -> Self {
+        Self { x: v, y: v }
+    }
+}
+
+// this version looks kinda cool... is it more readable? more annoying to copy and change though
+impl_op!(impl Add for Vec2: add x y);
+impl_op!(Vec2 Sub sub; x y);
+impl_op!(Vec2 Mul mul; x y);
+impl_op!(Vec2 Div div; x y);
+
+impl Neg for Vec2 {
+    type Output = Self;
+
+    fn neg(mut self) -> Self::Output {
+        self.x = -self.x;
+        self.y = -self.y;
+        self
+    }
+}
+
+impl From<(f32, f32)> for Vec2 {
+    fn from((x, y): (f32, f32)) -> Self {
+        Self { x, y }
+    }
+}

src/layout/widget.rs

@@ -3,7 +3,7 @@ use std::{
     marker::PhantomData,
 };
 
-use crate::{primitive::Painter, util::ID, UIBuilder};
+use crate::{Painter, util::ID, UIBuilder};
 
 pub trait Widget: 'static + Any {
     fn draw(&self, painter: &mut Painter);

src/render/data.rs

@@ -1,12 +1,6 @@
-use crate::primitive::UIRegion;
 use wgpu::VertexAttribute;
 
-#[repr(C)]
+use crate::UIRegion;
-#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
-pub struct PrimitiveInstance {
-    pub region: UIRegion,
-    pub ptr: u32,
-}
 
 #[repr(C)]
 #[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable, Default)]
@@ -15,6 +9,13 @@ pub struct WindowUniform {
     pub height: f32,
 }
 
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct PrimitiveInstance {
+    pub region: UIRegion,
+    pub ptr: u32,
+}
+
 impl PrimitiveInstance {
     const ATTRIBS: [VertexAttribute; 5] = wgpu::vertex_attr_array![
         0 => Float32x2,

src/render/mod.rs

@@ -1,7 +1,4 @@
-use crate::{
+use crate::{UI, primitive::PrimitiveInstance, render::util::ArrBuf};
-    render::{data::PrimitiveInstance, util::ArrBuf},
-    UI,
-};
 use data::WindowUniform;
 use wgpu::{
     util::{BufferInitDescriptor, DeviceExt},

src/render/primitive.rs

@@ -0,0 +1,27 @@
+use crate::Color;
+
+pub use super::data::PrimitiveInstance;
+
+#[derive(Default)]
+pub struct Primitives {
+    pub instances: Vec<PrimitiveInstance>,
+    pub data: Vec<u32>,
+}
+
+/// NOTE: Self must have at least u32 alignment
+pub trait PrimitiveData: bytemuck::Pod {
+    const DISCRIM: u32;
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct RoundedRectData {
+    pub color: Color<u8>,
+    pub radius: f32,
+    pub thickness: f32,
+    pub inner_radius: f32,
+}
+
+impl PrimitiveData for RoundedRectData {
+    const DISCRIM: u32 = 0;
+}

src/render/primitive/def.rs

@@ -1,14 +0,0 @@
-use crate::primitive::{Color, PrimitiveData};
-
-#[repr(C)]
-#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
-pub struct RoundedRectData {
-    pub color: Color<u8>,
-    pub radius: f32,
-    pub thickness: f32,
-    pub inner_radius: f32,
-}
-
-impl PrimitiveData for RoundedRectData {
-    const DISCRIM: u32 = 0;
-}

src/render/primitive/vec2.rs

@@ -1,100 +0,0 @@
-use std::ops::*;
-
-#[repr(C)]
-#[derive(Debug, Clone, Copy, PartialEq, Default, bytemuck::Pod, bytemuck::Zeroable)]
-pub struct Vec2 {
-    pub x: f32,
-    pub y: f32,
-}
-
-pub const fn point(x: f32, y: f32) -> Vec2 {
-    Vec2::new(x, y)
-}
-
-impl Vec2 {
-    pub const fn new(x: f32, y: f32) -> Self {
-        Self { x, y }
-    }
-
-    pub const fn lerp(self, to: Self, amt: impl const Into<Self>) -> Self {
-        let amt = amt.into();
-        Self {
-            x: lerp(self.x, to.x, amt.x),
-            y: lerp(self.y, to.y, amt.y),
-        }
-    }
-}
-
-const fn lerp(x: f32, y: f32, amt: f32) -> f32 {
-    (1.0 - amt) * x + y * amt
-}
-
-impl const From<f32> for Vec2 {
-    fn from(v: f32) -> Self {
-        Self { x: v, y: v }
-    }
-}
-
-macro_rules! impl_op_inner {
-    ($op:ident $fn:ident $opa:ident $fna:ident) => {
-        impl const $op for Vec2 {
-            type Output = Self;
-
-            fn $fn(self, rhs: Self) -> Self::Output {
-                Self {
-                    x: self.x.$fn(rhs.x),
-                    y: self.y.$fn(rhs.y),
-                }
-            }
-        }
-        impl $opa for Vec2 {
-            fn $fna(&mut self, rhs: Self) {
-                self.x.$fna(rhs.x);
-                self.y.$fna(rhs.y);
-            }
-        }
-        impl const $op<f32> for Vec2 {
-            type Output = Self;
-
-            fn $fn(self, rhs: f32) -> Self::Output {
-                Self {
-                    x: self.x.$fn(rhs),
-                    y: self.y.$fn(rhs),
-                }
-            }
-        }
-        impl $opa<f32> for Vec2 {
-            fn $fna(&mut self, rhs: f32) {
-                self.x.$fna(rhs);
-                self.y.$fna(rhs);
-            }
-        }
-    };
-}
-
-macro_rules! impl_op {
-    ($op:ident $fn:ident) => {
-        impl_op_inner!($op $fn ${concat($op,Assign)} ${concat($fn,_assign)});
-    };
-}
-
-impl_op!(Add add);
-impl_op!(Sub sub);
-impl_op!(Mul mul);
-impl_op!(Div div);
-
-impl Neg for Vec2 {
-    type Output = Self;
-
-    fn neg(mut self) -> Self::Output {
-        self.x = -self.x;
-        self.y = -self.y;
-        self
-    }
-}
-
-impl From<(f32, f32)> for Vec2 {
-    fn from((x, y): (f32, f32)) -> Self {
-        Self { x, y }
-    }
-}

src/render/shader.wgsl

@@ -42,8 +42,8 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
 
-    let top_left = (in.top_left_anchor + 1.0) / 2.0 * window.dim + in.top_left_offset;
+    let top_left = in.top_left_anchor * window.dim + in.top_left_offset;
-    let bot_right = (in.bottom_right_anchor + 1.0) / 2.0 * window.dim + in.bottom_right_offset;
+    let bot_right = in.bottom_right_anchor * window.dim + in.bottom_right_offset;
     let size = bot_right - top_left;
 
     var pos = top_left + vec2<f32>(

src/testing/mod.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use app::App;
-use gui::{RoundedRect, UI, UIColor, WidgetArrUtil, WidgetUtil, primitive::Axis};
+use gui::{Dir, Rect, UI, UIColor, WidgetArrUtil, WidgetUtil, fixed, ratio, rel};
 use render::Renderer;
 use winit::{event::WindowEvent, event_loop::ActiveEventLoop, window::Window};
 
@@ -19,9 +19,9 @@ pub struct Client {
 impl Client {
     pub fn new(window: Arc<Window>) -> Self {
         let mut renderer = Renderer::new(window);
-        let rect = RoundedRect {
+        let rect = Rect {
             color: UIColor::WHITE,
-            radius: 10.0,
+            radius: 20.0,
             thickness: 0.0,
             inner_radius: 0.0,
         };
@@ -38,19 +38,36 @@ impl Client {
                             rect.color(UIColor::ORANGE),
                             rect.color(UIColor::LIME).pad(10.0),
                         )
-                            .span(Axis::Y, [1, 1]),
+                            .span(Dir::RIGHT, [1, 1]),
                         rect.color(UIColor::YELLOW),
                     )
-                        .span(Axis::X, [2, 2, 1])
+                        .span(Dir::RIGHT, [2, 2, 1])
                         .pad(10),
                 )
-                    .span(Axis::X, [1, 3]),
+                    .span(Dir::RIGHT, [1, 3]),
+                (
                     rect.color(UIColor::GREEN),
+                    rect.color(UIColor::ORANGE),
+                    rect.color(UIColor::CYAN),
+                    rect.color(UIColor::BLUE),
+                    rect.color(UIColor::MAGENTA),
+                    rect.color(UIColor::RED),
                 )
-                .span(Axis::Y, [3, 1])
+                    .span(
+                        Dir::RIGHT,
+                        [
+                            fixed(100),
+                            ratio(1),
+                            ratio(1),
+                            rel(0.5),
+                            fixed(100),
+                            fixed(100),
+                        ],
+                    ),
+            )
+                .span(Dir::DOWN, [3, 1])
                 .pad(10),
         );
-        // let mut ui = ui.finish((blue, rect.color(UIColor::RED)).span(Axis::X, [1, 1]));
         ui.widgets.get_mut(&handle).unwrap().color = UIColor::MAGENTA;
         renderer.update(&ui);
         Self { renderer }

src/util/math.rs

@@ -0,0 +1,58 @@
+use std::ops::*;
+
+#[const_trait]
+pub trait F32Util {
+    fn lerp<T: const Mul<f32, Output = T> + const Add<Output = T>>(self, from: T, to: T) -> T;
+}
+
+impl const F32Util for f32 {
+    fn lerp<T: const Mul<f32, Output = T> + const Add<Output = T>>(self, from: T, to: T) -> T {
+        from * (1.0 - self) + to * self
+    }
+}
+
+macro_rules! impl_op {
+    ($T:ident $op:ident $fn:ident $opa:ident $fna:ident; $($field:ident)*) => {
+    mod ${concat(op_, $fn, _impl)} {
+        use super::*;
+        #[allow(unused_imports)]
+        use std::ops::*;
+        impl const $op for $T {
+            type Output = Self;
+
+            fn $fn(self, rhs: Self) -> Self::Output {
+                Self {
+                    $($field: self.$field.$fn(rhs.$field),)*
+                }
+            }
+        }
+        impl $opa for $T {
+            fn $fna(&mut self, rhs: Self) {
+                $(self.$field.$fna(rhs.$field);)*
+            }
+        }
+        impl const $op<f32> for $T {
+            type Output = Self;
+
+            fn $fn(self, rhs: f32) -> Self::Output {
+                Self {
+                    $($field: self.$field.$fn(rhs),)*
+                }
+            }
+        }
+        impl $opa<f32> for $T {
+            fn $fna(&mut self, rhs: f32) {
+                $(self.$field.$fna(rhs);)*
+            }
+        }
+    }
+    };
+    ($T:ident $op:ident $fn:ident; $($field:ident)*) => {
+        impl_op!($T $op $fn ${concat($op,Assign)} ${concat($fn,_assign)}; $($field)*);
+    };
+    (impl $op:ident for $T:ident: $fn:ident $($field:ident)*) => {
+        impl_op!($T $op $fn ${concat($op,Assign)} ${concat($fn,_assign)}; $($field)*);
+    };
+}
+
+pub(crate) use impl_op;

src/util/mod.rs

@@ -1,3 +1,5 @@
 mod id;
+mod math;
 
 pub use id::*;
+pub use math::*;