Mercurial > gemma

annotate cmd/tin2octree/vertex.go @ 720:aeaa2adf5a8b octree

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octree: write SQL insert statements for octree indices.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 21 Sep 2018 17:36:00 +0200
parents b17e3ce53285
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package main
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2
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3 type vertex struct {
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4 x float64
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5 y float64
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6 z float64
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7 }
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8
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9 func (v *vertex) minimize(w vertex) {
af1d4d44a88a Experimental tin octree indexer.
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10 if w.x < v.x {
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11 v.x = w.x
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12 }
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13 if w.y < v.y {
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14 v.y = w.y
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15 }
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16 if w.z < v.z {
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17 v.z = w.z
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18 }
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19 }
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20
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21 func (v *vertex) maximize(w vertex) {
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22 if w.x > v.x {
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23 v.x = w.x
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24 }
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25 if w.y > v.y {
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26 v.y = w.y
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27 }
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28 if w.z > v.z {
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29 v.z = w.z
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30 }
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31 }
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32
673
9a0246ab3021 octree: simplified vertex interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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33 func (v vertex) sub(w vertex) vertex {
9a0246ab3021 octree: simplified vertex interpolation.
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34 return vertex{
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35 v.x - w.x,
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36 v.y - w.y,
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37 v.z - w.z,
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38 }
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39 }
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40
682
b17e3ce53285 octree: simplified cube indexing.
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41 func (v vertex) add(w vertex) vertex {
b17e3ce53285 octree: simplified cube indexing.
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42 return vertex{
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43 v.x + w.x,
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44 v.y + w.y,
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45 v.z + w.z,
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46 }
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47 }
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48
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49 func interpolate(v1, v2 vertex) func(vertex) vertex {
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50 v2 = v2.sub(v1)
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51 return func(s vertex) vertex {
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52 return vertex{
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53 v2.x*s.x + v1.x,
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54 v2.y*s.y + v1.y,
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55 v2.z*s.z + v1.z,
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56 }
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57 }
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58 }
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59
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60 func (a vertex) less(b vertex) bool {
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61 return a.x < b.x || a.y < b.y || a.z < b.z
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62 }