Give roofs their actual shapes

sermuns commented

2026-10-17 20:40:03 +00:00

Owner

Every roof in the world is a flat cap: mesh::roof_tris fans the
footprint at collision::building_roof_height, and the shell has no roof form at
all. The extract has 329 roof:shape tags:

182  flat        86  gabled       40  skillion     13  hipped
  3  gambrel      3  saltbox      1  many         1  quadruple_saltbox

86 gabled and 40 skillion roofs are currently drawn as flat lids, which is most
of the visible silhouette of every OSM shell outside the MazeMap footprints.

roof:shape plus the footprint's longest edge gives the ridge direction and
form; roof:height (14 ways, mostly 5 and 2) gives the rise, and falls back to
a fraction of the footprint's short side when absent.

MazeMap buildings have no roof:shape and keep their flat cap -- only the OSM
shells this touches.

Needs a decision about collision: a gabled roof is not a walkable surface. The
flat cap should stay as the collision surface and the gable drawn over it, rather
than making the walker climb.

Related

#14 the same tags, colour rather than shape
#51 the tag census this came from

Every roof in the world is a flat cap: `mesh::roof_tris` fans the footprint at `collision::building_roof_height`, and the shell has no roof form at all. The extract has **329 `roof:shape` tags**: ``` 182 flat 86 gabled 40 skillion 13 hipped 3 gambrel 3 saltbox 1 many 1 quadruple_saltbox ``` 86 gabled and 40 skillion roofs are currently drawn as flat lids, which is most of the visible silhouette of every OSM shell outside the MazeMap footprints. `roof:shape` plus the footprint's longest edge gives the ridge direction and form; `roof:height` (14 ways, mostly 5 and 2) gives the rise, and falls back to a fraction of the footprint's short side when absent. MazeMap buildings have no `roof:shape` and keep their flat cap -- only the OSM shells this touches. Needs a decision about collision: a gabled roof is not a walkable surface. The flat cap should stay as the collision surface and the gable drawn over it, rather than making the walker climb. --- **Related** - #14 the same tags, colour rather than shape - #51 the tag census this came from

sermuns referenced this issue

2026-10-17 20:43:46 +00:00

Use roof and facade colours from OSM #14

sermuns referenced this issue

2026-10-19 21:41:36 +00:00

Light the windows with the real campus #64

sermuns added the

feature request

medium

labels

2026-10-19 22:14:04 +00:00

sermuns added this to the Buildings & landmarks milestone

2026-10-19 22:18:44 +00:00

sermuns referenced this issue

2026-10-19 22:35:28 +00:00

Studenthuset's sail still needs work #72

sermuns commented

2026-10-19 22:46:14 +00:00

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Owner

Roof shapes are the biggest silhouette win per line of code in the list. Using the footprint's longest edge for the ridge, falling back to a fraction of the short side, and keeping the flat cap as collision is the right set of compromises. Pair it with #14 since they parse the same tags.

sermuns commented

2026-10-20 07:39:23 +00:00

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Owner

Implemented in 2d7ddc5 on roof-shapes-colours (not yet merged to main): roof:shape, roof:height and roof:direction are parsed and gabled, skillion, hipped, gambrel and saltbox roofs are drawn over the flat collision cap.

Implemented in 2d7ddc5 on `roof-shapes-colours` (not yet merged to `main`): `roof:shape`, `roof:height` and `roof:direction` are parsed and gabled, skillion, hipped, gambrel and saltbox roofs are drawn over the flat collision cap.

sermuns closed this issue

2026-10-20 07:39:24 +00:00

sermuns referenced this issue from a commit

2026-10-20 07:42:32 +00:00

(slop) draw tagged roof shapes and colours

sermuns referenced this issue from a pull request that will close it,

2026-10-20 07:43:42 +00:00

Draw tagged roof shapes and colours #75

sermuns referenced this issue from a commit

2026-10-20 08:29:34 +00:00

(slop) draw tagged roof shapes and colours

sermuns referenced this issue