Mercurial > gemma
comparison pkg/octree/contours.go @ 2479:c85b16db8a02 octree-diff
Calculate better triangulation and store it into database.
A bit fake by now. Needs extra:
CREATE TABLE diff_contour_lines (
height numeric NOT NULL,
lines geography(MultiLineString,4326) NOT NULL
);
GRANT ALL ON diff_contour_lines TO sophie;
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Thu, 28 Feb 2019 15:55:32 +0100 |
| parents | f4dcbe8941a1 |
| children | 45d51a49f191 |
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| 2478:930ca9c4e2a7 | 2479:c85b16db8a02 |
|---|---|
| 13 // * Tom Gottfried <tom.gottfried@intevation.de> | 13 // * Tom Gottfried <tom.gottfried@intevation.de> |
| 14 | 14 |
| 15 package octree | 15 package octree |
| 16 | 16 |
| 17 import ( | 17 import ( |
| 18 "log" | |
| 18 "runtime" | 19 "runtime" |
| 19 "sync" | 20 "sync" |
| 20 ) | 21 ) |
| 21 | 22 |
| 22 // ContourResult stores an calculated iso line for a given height. | 23 // ContourResult stores an calculated iso line for a given height. |
| 64 // This is done concurrently. | 65 // This is done concurrently. |
| 65 // It is guaranteed that the results are given to the store | 66 // It is guaranteed that the results are given to the store |
| 66 // function in order of the original heights values. | 67 // function in order of the original heights values. |
| 67 func DoContours(tree *Tree, heights []float64, store func(*ContourResult)) { | 68 func DoContours(tree *Tree, heights []float64, store func(*ContourResult)) { |
| 68 | 69 |
| 70 if len(heights) == 0 { | |
| 71 return | |
| 72 } | |
| 73 | |
| 74 log.Printf("num heights: %d\n", len(heights)) | |
| 75 | |
| 69 contours := make([]*ContourResult, len(heights)) | 76 contours := make([]*ContourResult, len(heights)) |
| 70 | 77 |
| 71 for i, h := range heights { | 78 for i, h := range heights { |
| 72 contours[i] = NewContourResult(h) | 79 contours[i] = NewContourResult(h) |
| 73 } | 80 } |