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Make debug lines visible from more directions

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This commit is contained in:
Ludvig Böklin
2021-06-22 15:32:13 +02:00
parent 09bb35075b
commit 5debf68821
1 changed files with 18 additions and 2 deletions
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20
voxygen/src/scene/debug.rs
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@ -24,8 +24,24 @@ impl DebugShape {
};
match self {
DebugShape::Line([a, b]) => {
let h = Vec3::new(0.0, 1.0, 0.0);
mesh.push_quad(quad(*a, a + h, b + h, *b));
// Creates two quads to make the line visible from all directions (except when
// perfectly parallel to the view). Duplicate both quads with
// opposite normals to make them double-sided.
// Width
let w = 0.05;
let vert = Vec3::unit_z() * w;
mesh.push_quad(quad(*a - vert, a + vert, b + vert, *b - vert));
mesh.push_quad(quad(*b - vert, b + vert, a + vert, *a - vert));
let horiz = (b - a)
.cross(Vec3::unit_z())
.try_normalized()
.unwrap_or_else(Vec3::unit_y)
* w;
mesh.push_quad(quad(*a - horiz, a + horiz, b + horiz, *b - horiz));
mesh.push_quad(quad(*b - horiz, b + horiz, a + horiz, *a - horiz));
},
DebugShape::Cylinder { radius, height } => {
const SUBDIVISIONS: usize = 16;