1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183

use crate::color::conv::IntoLinSrgba;
use crate::draw::primitive::polygon::{self, PolygonInit, PolygonOptions, SetPolygon};
use crate::draw::primitive::Primitive;
use crate::draw::properties::spatial::{dimension, orientation, position};
use crate::draw::properties::{
    spatial, ColorScalar, LinSrgba, SetColor, SetDimensions, SetOrientation, SetPosition, SetStroke,
};
use crate::draw::{self, Drawing};
use crate::geom::{self, pt2, Point2};
use crate::glam::vec2;
use lyon::tessellation::StrokeOptions;

/// Properties related to drawing a **Quad**.
#[derive(Clone, Debug)]
pub struct Quad {
    quad: geom::Quad<Point2>,
    polygon: PolygonInit,
    dimensions: spatial::dimension::Properties,
}

/// The drawing context for a `Quad`.
pub type DrawingQuad<'a> = Drawing<'a, Quad>;

// Quad-specific methods.

impl Quad {
    /// Stroke the outline with the given color.
    pub fn stroke<C>(self, color: C) -> Self
    where
        C: IntoLinSrgba<ColorScalar>,
    {
        self.stroke_color(color)
    }

    /// Use the given four points as the vertices (corners) of the quad.
    pub fn points<P>(mut self, a: P, b: P, c: P, d: P) -> Self
    where
        P: Into<Point2>,
    {
        let a = a.into();
        let b = b.into();
        let c = c.into();
        let d = d.into();
        self.quad = geom::Quad([a, b, c, d]);
        self
    }
}

// Trait implementations.
impl draw::renderer::RenderPrimitive for Quad {
    fn render_primitive(
        self,
        ctxt: draw::renderer::RenderContext,
        mesh: &mut draw::Mesh,
    ) -> draw::renderer::PrimitiveRender {
        let Quad {
            mut quad,
            polygon,
            dimensions,
        } = self;

        // If dimensions were specified, scale the points to those dimensions.
        let (maybe_x, maybe_y, _maybe_z) = (dimensions.x, dimensions.y, dimensions.z);
        if maybe_x.is_some() || maybe_y.is_some() {
            let cuboid = quad.bounding_rect();
            let centroid = quad.centroid();
            let x_scale = maybe_x.map(|x| x / cuboid.w()).unwrap_or(1.0);
            let y_scale = maybe_y.map(|y| y / cuboid.h()).unwrap_or(1.0);
            let scale = vec2(x_scale, y_scale);
            let (a, b, c, d) = quad.into();
            let translate = |v: Point2| centroid + ((v - centroid) * scale);
            let new_a = translate(a);
            let new_b = translate(b);
            let new_c = translate(c);
            let new_d = translate(d);
            quad = geom::Quad([new_a, new_b, new_c, new_d]);
        }

        let points = quad.vertices();
        polygon::render_points_themed(
            polygon.opts,
            points,
            ctxt,
            &draw::theme::Primitive::Quad,
            mesh,
        );

        draw::renderer::PrimitiveRender::default()
    }
}

impl From<geom::Quad<Point2>> for Quad {
    fn from(quad: geom::Quad<Point2>) -> Self {
        let polygon = Default::default();
        let dimensions = Default::default();
        Quad {
            polygon,
            dimensions,
            quad,
        }
    }
}

impl Default for Quad {
    fn default() -> Self {
        // Create a quad pointing towards 0.0 radians.
        let fifty = 50.0;
        let left = -fifty;
        let bottom = -fifty;
        let right = fifty;
        let top = fifty;
        let a = pt2(left, bottom);
        let b = pt2(left, top);
        let c = pt2(right, top);
        let d = pt2(right, bottom);
        Quad::from(geom::Quad([a, b, c, d]))
    }
}

impl SetOrientation for Quad {
    fn properties(&mut self) -> &mut orientation::Properties {
        SetOrientation::properties(&mut self.polygon)
    }
}

impl SetPosition for Quad {
    fn properties(&mut self) -> &mut position::Properties {
        SetPosition::properties(&mut self.polygon)
    }
}

impl SetDimensions for Quad {
    fn properties(&mut self) -> &mut dimension::Properties {
        SetDimensions::properties(&mut self.dimensions)
    }
}

impl SetColor<ColorScalar> for Quad {
    fn rgba_mut(&mut self) -> &mut Option<LinSrgba> {
        SetColor::rgba_mut(&mut self.polygon)
    }
}

impl SetStroke for Quad {
    fn stroke_options_mut(&mut self) -> &mut StrokeOptions {
        SetStroke::stroke_options_mut(&mut self.polygon)
    }
}

impl SetPolygon for Quad {
    fn polygon_options_mut(&mut self) -> &mut PolygonOptions {
        SetPolygon::polygon_options_mut(&mut self.polygon)
    }
}

// Primitive conversions.

impl From<Quad> for Primitive {
    fn from(prim: Quad) -> Self {
        Primitive::Quad(prim)
    }
}

impl Into<Option<Quad>> for Primitive {
    fn into(self) -> Option<Quad> {
        match self {
            Primitive::Quad(prim) => Some(prim),
            _ => None,
        }
    }
}

// Drawing methods.

impl<'a> DrawingQuad<'a> {
    /// Use the given points as the vertices (corners) of the quad.
    pub fn points<P>(self, a: P, b: P, c: P, d: P) -> Self
    where
        P: Into<Point2>,
    {
        self.map_ty(|ty| ty.points(a, b, c, d))
    }
}