From 41895ea7b83927922eebf51a2046d02f624bab99 Mon Sep 17 00:00:00 2001
From: emile <hanemile@protonmail.com>
Date: Sat, 13 Oct 2018 22:36:56 +0200
Subject: Moved the functions used for 3D drawing to another file (draw3D.go)

---
 draw/draw3D.go | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 draw/draw3D.go

diff --git a/draw/draw3D.go b/draw/draw3D.go
new file mode 100644
index 0000000..62d0f05
--- /dev/null
+++ b/draw/draw3D.go
@@ -0,0 +1,58 @@
+package draw
+
+import (
+	"../llog"
+	"../structs"
+	"github.com/fogleman/ln/ln"
+)
+
+func drawStar3D(scene ln.Scene, star structs.Star) ln.Scene {
+	starSize := 0.1
+	oneCorner := ln.Vector{star.C.X - starSize, star.C.Y - starSize, star.C.Z - starSize}
+	otherCorner := ln.Vector{star.C.X + starSize, star.C.Y + starSize, star.C.Z + starSize}
+
+	scene.Add(ln.NewCube(oneCorner, otherCorner))
+
+	return scene
+}
+
+func drawStars3D(scene ln.Scene, slice []structs.Star) ln.Scene {
+	for _, star := range slice {
+		scene = drawStar3D(scene, star)
+	}
+
+	return scene
+}
+
+func Slice3D(slice []structs.Star, path string) {
+	// create a scene and add a single cube
+	scene := ln.Scene{}
+
+	llog.Good("Drawing the Stars")
+	scene = drawStars3D(scene, slice)
+	llog.Good("Done Drawing the Stars")
+
+	// scene.Add(ln.NewCube(ln.Vector{-1, -1, -1}, ln.Vector{1, 1, 1}))
+
+	// define camera parameters
+	eye := ln.Vector{4, 3, 2}    // camera position
+	center := ln.Vector{0, 0, 0} // camera looks at
+	up := ln.Vector{0, 0, 1}     // up direction
+
+	// define rendering parameters
+	width := 1024.0  // rendered width
+	height := 1024.0 // rendered height
+	fovy := 50.0     // 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
+
+	llog.Good("Configuring path")
+	// compute 2D paths that depict the 3D scene
+	paths := scene.Render(eye, center, up, width, height, fovy, znear, zfar, step)
+	llog.Good("Done")
+
+	// render the paths in an image
+	llog.Good("Writing to png")
+	paths.WriteToPNG(path, width, height)
+}
-- 
cgit 1.4.1