Opened 18 years ago

Closed 15 years ago

#197 closed defect (fixed)

interpolate can't handle a grid where one vertex is connected to 14 triangles

Reported by: duncan Owned by: James Hudson
Priority: lowest Milestone:
Component: Functionality and features Version:
Severity: normal Keywords:
Cc:

Description

Interpolate can't handle a grid where one vertex is connected to 14 triangles. Quad.py will crash with a runtimeError. it gets into a recursion loop trying to split a quadtree cell up with 14 verts in the same position, so it can't split the cell. The standard way we run ANUGA will not produce a vert connected to more than 13 triangles though.

14 triangles connected to one vert is a high ratio. If you have 13 triangles the average angle for the triangle corners is 27.7 deg. Meshes with min angles less than 28 deg cause problems with triangle. The default min angle is 28 deg.

Change History (2)

comment:1 Changed 15 years ago by James Hudson

Owner: changed from Duncan to James Hudson

comment:2 Changed 15 years ago by James Hudson

Resolution: → fixed
Status: new → closed

THe new quadtree code does not place any limits on the number of triangles per branch. A unit test was written in changeset:7722 to confirm this.

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