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comparison cmd/tin2octree/vertex.go @ 673:9a0246ab3021 octree

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octree: simplified vertex interpolation.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 19 Sep 2018 11:03:00 +0200
parents be0327dc3119
children b17e3ce53285
comparison
equal deleted inserted replaced
672:5fa2eaffac84 673:9a0246ab3021
28 if w.z > v.z { 28 if w.z > v.z {
29 v.z = w.z 29 v.z = w.z
30 } 30 }
31 } 31 }
32 32
33 func (v vertex) sub(w vertex) vertex {
34 return vertex{
35 v.x - w.x,
36 v.y - w.y,
37 v.z - w.z,
38 }
39 }
40
33 func interpolate(v1, v2 vertex) func(vertex) vertex { 41 func interpolate(v1, v2 vertex) func(vertex) vertex {
42 v2 = v2.sub(v1)
34 return func(s vertex) vertex { 43 return func(s vertex) vertex {
35 return vertex{ 44 return vertex{
36 (v2.x-v1.x)*s.x + v1.x, 45 v2.x*s.x + v1.x,
37 (v2.y-v1.y)*s.y + v1.y, 46 v2.y*s.y + v1.y,
38 (v2.z-v1.z)*s.z + v1.z, 47 v2.z*s.z + v1.z,
39 } 48 }
40 } 49 }
41 } 50 }
42 51
43 func (a vertex) less(b vertex) bool { 52 func (a vertex) less(b vertex) bool {