diff options
Diffstat (limited to 'draw.go')
| -rw-r--r-- | draw.go | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/draw.go b/draw.go deleted file mode 100644 index 277a8d2..0000000 --- a/draw.go +++ /dev/null @@ -1,156 +0,0 @@ -package structs - -import ( - "fmt" - "log" - - "github.com/fogleman/gg" -) - -func initializePlot(imageWidth int, imageHeight int) *gg.Context { - - // define an new context using the given image width and height - context := gg.NewContext(imageWidth, imageHeight) - - // set the background color to black - context.SetRGB(0, 0, 0) - context.Clear() - context.SetRGB(1, 1, 1) - - // translate the coordinate origin to the midpoint of the image - context.Translate(float64(imageWidth/2), float64(imageHeight/2)) - - return context -} - -// drawQuadtree draws a given quadtree and the stars in it recursively to the given canvas -func drawQuadtree(context *gg.Context, q Quadtree) { - - // find out if the node is a leaf find out if the node is a leaf find out if the node is a leaf find out if the node is a leaf - var draw bool = false - for i := 0; i < 4; i++ { - if q.Quadrants[i] == nil { - draw = true - } - } - - // draw the bounding box and the star if the node is a leaf - if draw == true { - - // Don't draw nonexistent stars - if q.Star != (Star2D{}) { - - // define the current star - x := q.Star.C.X - y := q.Star.C.Y - starsize := 2 - - // set the color of the stars to green - context.SetRGB(0, 1, 1) - context.DrawPoint(x, y, float64(starsize)) - context.Fill() - // context.DrawString(fmt.Sprintf("(%f, %f)", x, y), x, y) - context.Stroke() - log.Printf("[***] Drawing Star (%f, %f)", x, y) - } - - // define the bounding box - boundingx := q.Boundary.Center.X - boundingy := q.Boundary.Center.Y - boundingw := q.Boundary.Width - - // bottom left corner - contextx := boundingx - (boundingw / 2) - contexty := boundingy - (boundingw / 2) - - // draw the rectangle - context.SetRGB(1, 1, 1) - context.DrawRectangle(contextx, contexty, boundingw, boundingw) - context.Stroke() - - log.Printf("[***] Drawing Box ((%f, %f), %f)", contextx, contexty, boundingw) - } - - // draw all the other trees recursively... - for i := 0; i < 4; i++ { - // ... but only if they exist - if q.Quadrants[i] != nil { - drawQuadtree(context, *q.Quadrants[i]) - } - } -} - -// saveImage saves the given context to the given path as a png -func saveImage(context *gg.Context, outpath string) { - savePngError := context.SavePNG(outpath) - if savePngError != nil { - panic(savePngError) - } -} - -// DrawGalaxy draws the given quadtree to the given output path -func (q Quadtree) DrawGalaxy(outpath string) { - log.Printf("Drawing the quadtree to %s", outpath) - - // define the image dimensions - imageWidth := 1024 * 8 - imageHeight := 1024 * 8 - - // define a new context to draw on - context := initializePlot(imageWidth, imageHeight) - - // first recursive call of drawQuadtree - drawQuadtree(context, q) - - // save the context to the given output path - saveImage(context, outpath) -} - -// GeneratePrintTree generates forest code for drawing a tree -func (q Quadtree) GeneratePrintTree(depth int) string { - returnString := "" - if q.Star != (Star2D{}) { - returnString += "[a" - fmt.Printf("[a") - } else { - returnString += "[" - fmt.Printf("[") - } - - for i := 0; i < 4; i++ { - if q.Quadrants[i] != nil { - returnString += fmt.Sprintf("[%d]", depth) - returnString += q.Quadrants[i].GeneratePrintTree(depth + 1) - } - } - - // ok, the reason the final image will only show the nodes in the leaf is, that in the latex - // forest package that I use, trees must be drawn like this: [a[b]] and not like this: [[b]a]. - // [[b]a] == [[b]]. So there might be a lot of zeros, but that's ok! - if q.Star != (Star2D{}) { - returnString += "a]" - fmt.Printf("a]") - } else { - returnString += "]" - fmt.Printf("]") - } - - return returnString -} - -// DrawTree returns a valid LaTeX Document as a string drawing the quadtree it is called on using the forest package -func (q Quadtree) DrawTree() string { - s1 := `\documentclass{article} -\usepackage{tikz} -\usepackage{forest} -\begin{document} -\begin{forest} -for tree={circle,draw, s sep+=0.25em}` - - s2 := q.GeneratePrintTree(0) - - s3 := `\end{forest} -\end{document}` - - return fmt.Sprintf("%s\n%s\n%s\n", s1, s2, s3) -} |
