Example #1
0
File: earth.go Project: fogleman/ln
func Circle(r float64) ln.Path {
	var result ln.Path
	for i := 0; i <= 360; i++ {
		a := ln.Radians(float64(i))
		x := math.Cos(a) * r
		y := math.Sin(a) * r
		result = append(result, ln.Vector{x, y, 0})
	}
	return result
}
Example #2
0
File: csg.go Project: fogleman/ln
func main() {
	shape := ln.NewDifference(
		ln.NewIntersection(
			ln.NewSphere(ln.Vector{}, 1),
			ln.NewCube(ln.Vector{-0.8, -0.8, -0.8}, ln.Vector{0.8, 0.8, 0.8}),
		),
		ln.NewCylinder(0.4, -2, 2),
		ln.NewTransformedShape(ln.NewCylinder(0.4, -2, 2), ln.Rotate(ln.Vector{1, 0, 0}, ln.Radians(90))),
		ln.NewTransformedShape(ln.NewCylinder(0.4, -2, 2), ln.Rotate(ln.Vector{0, 1, 0}, ln.Radians(90))),
	)
	for i := 0; i < 90; i += 2 {
		fmt.Println(i)
		scene := ln.Scene{}
		m := ln.Rotate(ln.Vector{0, 0, 1}, ln.Radians(float64(i)))
		scene.Add(ln.NewTransformedShape(shape, m))
		eye := ln.Vector{0, 6, 2}
		center := ln.Vector{0, 0, 0}
		up := ln.Vector{0, 0, 1}
		width := 750.0
		height := 750.0
		paths := scene.Render(eye, center, up, width, height, 20, 0.1, 100, 0.01)
		paths.WriteToPNG(fmt.Sprintf("out%03d.png", i), width, height)
	}
}
Example #3
0
File: earth.go Project: fogleman/ln
func main() {
	lines := LoadPaths()
	m := ln.Identity()
	paths := Render(lines, m)
	paths = append(paths, Circle(0.95))
	paths = append(paths, Circle(0.953))
	paths = append(paths, Circle(0.956))
	paths.WriteToPNG("earth.png", 256)
	// paths.Print()
	for i := 0; i < 360; i += 2 {
		fmt.Println(i)
		m := ln.Rotate(ln.Vector{0, 0, 1}, ln.Radians(float64(i)))
		paths := Render(lines, m)
		paths = append(paths, Circle(0.95))
		paths = append(paths, Circle(0.953))
		paths = append(paths, Circle(0.956))
		filename := fmt.Sprintf("out%03d.png", i)
		paths.WriteToPNG(filename, 256)
	}
}
Example #4
0
File: graph.go Project: fogleman/ln
func render(frame int) {
	cx := math.Cos(ln.Radians(float64(frame)))
	cy := math.Sin(ln.Radians(float64(frame)))
	scene := ln.Scene{}
	eye := ln.Vector{cx, cy, 0}.MulScalar(8)
	center := ln.Vector{0, 0, 0}
	up := ln.Vector{0, 0, 1}

	nodes := []ln.Vector{
		{1.047, -0.000, -1.312},
		{-0.208, -0.000, -1.790},
		{2.176, 0.000, -2.246},
		{1.285, -0.001, 0.016},
		{-1.276, -0.000, -0.971},
		{-0.384, 0.000, -2.993},
		{-2.629, -0.000, -1.533},
		{-1.098, -0.000, 0.402},
		{0.193, 0.005, 0.911},
		{-1.934, -0.000, 1.444},
		{2.428, -0.000, 0.437},
		{0.068, -0.000, 2.286},
		{-1.251, -0.000, 2.560},
		{1.161, -0.000, 3.261},
		{1.800, 0.001, -3.269},
		{2.783, 0.890, -2.082},
		{2.783, -0.889, -2.083},
		{-2.570, -0.000, -2.622},
		{-3.162, -0.890, -1.198},
		{-3.162, 0.889, -1.198},
		{-1.679, 0.000, 3.552},
		{1.432, -1.028, 3.503},
		{2.024, 0.513, 2.839},
		{0.839, 0.513, 4.167},
		// {0.000000, 0.000000, 0.000000},
		// {0.000000, 0.000000, 1.089000},
		// {1.026719, 0.000000, -0.363000},
		// {-0.513360, -0.889165, -0.363000},
		// {-0.513360, 0.889165, -0.363000},
		//
		// {0, 0, 0},
		// {-1, 0, 0},
		// {1, 0, 0},
		// {0, 1, 0},
		// {0, -1, 0},
		// {0, 0, 1},
		// {0, 0, -1},
		//
		// {-1, 1, 1},
		// {-1, 1, -1},
		// {-1, -1, 1},
		// {-1, -1, -1},
		// {1, 1, 1},
		// {1, 1, -1},
		// {1, -1, 1},
		// {1, -1, -1},
	}

	edges := [][2]int{
		{0, 1},
		{0, 2},
		{0, 3},
		{1, 4},
		{1, 5},
		{2, 14},
		{2, 15},
		{2, 16},
		{3, 8},
		{3, 10},
		{4, 6},
		{4, 7},
		{6, 17},
		{6, 18},
		{6, 19},
		{7, 8},
		{7, 9},
		{8, 11},
		{9, 12},
		{11, 12},
		{11, 13},
		{12, 20},
		{13, 21},
		{13, 22},
		{13, 23},
	}

	for _, v := range nodes {
		scene.Add(ln.NewOutlineSphere(eye, up, v, 0.333))
	}

	// for _, v0 := range nodes {
	// 	for _, v1 := range nodes {
	// 		if v0 == v1 {
	// 			continue
	// 		}
	for _, edge := range edges {
		v0 := nodes[edge[0]]
		v1 := nodes[edge[1]]
		d := v1.Sub(v0)
		z := d.Length()
		u := d.Cross(up).Normalize()
		a := math.Acos(d.Normalize().Dot(up))
		m := ln.Translate(v0)
		if a != 0 {
			m = ln.Rotate(u, a).Translate(v0)
		}
		c := ln.NewOutlineCylinder(m.Inverse().MulPosition(eye), up, 0.1, 0, z)
		scene.Add(ln.NewTransformedShape(c, m))
	}
	// }

	width := 750.0
	height := 750.0
	paths := scene.Render(eye, center, up, width, height, 60, 0.1, 100, 0.01)
	paths.WriteToPNG(fmt.Sprintf("out%03d.png", frame), width, height)
}