Mercurial > gemma
annotate cmd/octree2contour/vertex.go @ 726:5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sat, 22 Sep 2018 21:34:12 +0200 |
parents | c0bba602b60e |
children |
rev | line source |
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674
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
1 package main |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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2 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
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3 import ( |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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4 "encoding/binary" |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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5 "io" |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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6 "math" |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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7 ) |
674
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
diff
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8 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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9 type ( |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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10 Vertex struct { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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11 x float64 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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12 y float64 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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13 z float64 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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14 } |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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15 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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16 Triangle [3]Vertex |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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17 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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18 Line [2]Vertex |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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19 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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20 LineStringZ []Vertex |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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21 MultiLineStringZ []LineStringZ |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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22 ) |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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23 |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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24 func (v *Vertex) Minimize(w Vertex) { |
674
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
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25 if w.x < v.x { |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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26 v.x = w.x |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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27 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
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28 if w.y < v.y { |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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29 v.y = w.y |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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30 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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31 if w.z < v.z { |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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32 v.z = w.z |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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33 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
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34 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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35 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
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36 func (v *Vertex) Maximize(w Vertex) { |
674
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
diff
changeset
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37 if w.x > v.x { |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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38 v.x = w.x |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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39 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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40 if w.y > v.y { |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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41 v.y = w.y |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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42 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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43 if w.z > v.z { |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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44 v.z = w.z |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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45 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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46 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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47 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
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48 func (v Vertex) Sub(w Vertex) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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49 return Vertex{ |
674
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octree: Added loading frame for contour generation.
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parents:
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50 v.x - w.x, |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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51 v.y - w.y, |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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52 v.z - w.z, |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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53 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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54 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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55 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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56 func (v Vertex) Add(w Vertex) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
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57 return Vertex{ |
687
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
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58 v.x + w.x, |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
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59 v.y + w.y, |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
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60 v.z + w.z, |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
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61 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
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62 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
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63 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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64 func (v Vertex) scale(s float64) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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65 return Vertex{ |
687
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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66 s * v.x, |
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67 s * v.y, |
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68 s * v.z, |
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
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69 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
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70 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
diff
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71 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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72 func Interpolate(v1, v2 Vertex) func(Vertex) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
diff
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73 v2 = v2.Sub(v1) |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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74 return func(s Vertex) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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75 return Vertex{ |
674
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
diff
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76 v2.x*s.x + v1.x, |
120a82bd9953
octree: Added loading frame for contour generation.
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77 v2.y*s.y + v1.y, |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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78 v2.z*s.z + v1.z, |
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
diff
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79 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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80 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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81 } |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
82 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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83 func (a Vertex) Less(b Vertex) bool { |
674
120a82bd9953
octree: Added loading frame for contour generation.
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parents:
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84 return a.x < b.x || a.y < b.y || a.z < b.z |
120a82bd9953
octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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85 } |
687
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
diff
changeset
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86 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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87 func NewLine(p1, p2 Vertex) Line { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
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88 return Line{ |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
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89 p2.Sub(p1), |
687
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
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90 p1, |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
diff
changeset
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91 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
diff
changeset
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92 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
diff
changeset
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93 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
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94 func (l Line) Eval(t float64) Vertex { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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95 return l[0].scale(t).Add(l[1]) |
687
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
diff
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96 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
674
diff
changeset
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97 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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98 func (l Line) IntersectHorizontal(h float64) Vertex { |
687
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99 t := (h - l[1].z) / l[0].z |
726
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Renamed a few types to uppercase names to prepare the move to the octree package.
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parents:
718
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100 return l.Eval(t) |
687
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
diff
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101 } |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
diff
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102 |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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103 func side(z, h float64) int { |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
674
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104 switch { |
be90ab542aa7
octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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105 case z < h: |
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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106 return -1 |
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octree: contouring: Do the math to calculate the intersection points of the triangles and the planes.
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parents:
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107 case z > h: |
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108 return +1 |
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109 } |
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110 return 0 |
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111 } |
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112 |
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113 func (t *Triangle) IntersectHorizontal(h float64) LineStringZ { |
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114 sides := [3]int{ |
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115 side(t[0].z, h), |
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116 side(t[1].z, h), |
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117 side(t[2].z, h), |
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118 } |
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119 |
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120 var points LineStringZ |
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121 |
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122 for i := 0; i < 3; i++ { |
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123 j := (i + 1) % 3 |
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124 si := sides[i] |
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125 sj := sides[j] |
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126 |
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127 switch { |
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128 case si == 0 && sj == 0: |
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129 // both on plane |
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130 points = append(points, t[i], t[j]) |
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131 case si == 0 && sj != 0: |
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132 // first on plane |
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133 points = append(points, t[i]) |
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134 case si != 0 && sj == 0: |
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135 // second on plane |
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136 points = append(points, t[j]) |
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137 case si == sj: |
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138 // both on same side |
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139 default: |
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140 // real intersection |
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141 v := NewLine(t[i], t[j]).IntersectHorizontal(h) |
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142 points = append(points, v) |
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143 } |
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144 } |
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145 |
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146 return points |
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147 } |
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148 |
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149 func (v *Vertex) read(r io.Reader) error { |
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150 var buf [8]byte |
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151 b := buf[:] |
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152 if _, err := io.ReadFull(r, b); err != nil { |
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153 return nil |
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154 } |
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155 v.x = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
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156 if _, err := io.ReadFull(r, b); err != nil { |
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157 return nil |
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158 } |
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159 v.y = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
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160 if _, err := io.ReadFull(r, b); err != nil { |
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161 return nil |
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162 } |
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163 v.z = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
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164 return nil |
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165 } |