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Merkaba rendered with fogleman/ln
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| package main | |
| // Instructions | |
| // go get github.com/fogleman/ln/ln | |
| // go build merkaba.go | |
| // ./merkaba | |
| // convert -loop 0 -delay 1.5 out0*.png out.gif | |
| import "fmt" | |
| import "github.com/fogleman/ln/ln" | |
| func main() { | |
| // add two tetrahedrons | |
| a1 := ln.Vector{ 1, 1, 1} | |
| a2 := ln.Vector{ 1, -1, -1} | |
| a3 := ln.Vector{-1, 1, -1} | |
| a4 := ln.Vector{-1, -1, 1} | |
| b1 := ln.Vector{-1, -1, -1} | |
| b2 := ln.Vector{-1, 1, 1} | |
| b3 := ln.Vector{ 1, -1, 1} | |
| b4 := ln.Vector{ 1, 1, -1} | |
| t1 := ln.NewTriangle(a1, a2, a3) | |
| t2 := ln.NewTriangle(a1, a2, a4) | |
| t3 := ln.NewTriangle(a1, a3, a4) | |
| t4 := ln.NewTriangle(a2, a3, a4) | |
| t5 := ln.NewTriangle(b1, b2, b3) | |
| t6 := ln.NewTriangle(b1, b2, b4) | |
| t7 := ln.NewTriangle(b1, b3, b4) | |
| t8 := ln.NewTriangle(b2, b3, b4) | |
| tetra := ln.NewMesh([]*ln.Triangle {t1, t2, t3, t4, t5, t6, t7, t8}) | |
| for i := 0; i < 90; i += 1 { | |
| fmt.Println(i) | |
| m := ln.Rotate(ln.Vector{0, 0, -1}, ln.Radians(float64(i))) | |
| shape := ln.NewTransformedShape(tetra, m) | |
| render(shape, fmt.Sprintf("out%03d.png", i)) | |
| } | |
| } | |
| func render(shape ln.Shape, path string) { | |
| // create a scene | |
| scene := ln.Scene{} | |
| scene.Add(shape) | |
| // define camera parameters | |
| eye := ln.Vector{4, 4, 4} // camera position | |
| center := ln.Vector{0, 0, 0} // camera looks at | |
| up := ln.Vector{0, 0, 1} // up direction | |
| // define rendering parameters | |
| width := 512.0 // rendered width | |
| height := 512.0 // rendered height | |
| fovy := 40.0 // vertical field of view, degrees | |
| znear := 0.1 // near z plane | |
| zfar := 10.0 // far z plane | |
| step := 0.01 // how finely to chop the paths for visibility testing | |
| // compute 2D paths that depict the 3D scene | |
| paths := scene.Render(eye, center, up, width, height, fovy, znear, zfar, step) | |
| // render the paths in an image | |
| paths.WriteToPNG(path, width, height) | |
| // save the paths as an svg | |
| // paths.WriteToSVG("out.svg", width, height) | |
| } |
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