46 lines
883 B
Go
46 lines
883 B
Go
package main
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import "github.com/divan/three"
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// NewEthereumGeometry creates a geometry for representing Ethereum node (non-regular 3D octahedron).
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// It scales object according to the given scale.
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func NewEthereumGeometry(scale float64) three.Geometry {
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var geom = three.NewBasicGeometry(three.BasicGeometryParams{})
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vertices := []struct {
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x, y, z float64
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}{
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{scale * 1.0, 0.0, 0.0},
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{scale * -1.0, 0.0, 0.0},
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{0.0, scale * 1.5, 0.0},
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{0.0, scale * -1.5, 0.0},
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{0.0, 0.0, scale * 1.0},
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{0.0, 0.0, scale * -1.0},
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}
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for _, v := range vertices {
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geom.AddVertice(v.x, v.y, v.z)
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}
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faces := []struct {
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a, b, c int
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}{
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{0, 2, 4},
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{0, 4, 3},
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{0, 3, 5},
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{0, 5, 2},
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{1, 2, 5},
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{1, 5, 3},
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{1, 3, 4},
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{1, 4, 2},
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}
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for _, f := range faces {
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geom.AddFace(f.a, f.b, f.c)
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}
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geom.ComputeBoundingSphere()
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geom.ComputeFaceNormals()
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return geom
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}
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