commit a02ceec3359b9f24d607b5dd835869a87c5852d9 Author: John Thornton Date: Thu Oct 15 05:42:37 2015 -0500 First commit diff --git a/dxf2gcode.go b/dxf2gcode.go new file mode 100644 index 0000000..0d53da1 --- /dev/null +++ b/dxf2gcode.go @@ -0,0 +1,244 @@ +package main +// dxf2g version 0.0000001 +import ( + "bufio" + "os" + "fmt" + "strconv" + "math" + "sort" + "strings" +) + +func check(e error) { + if e != nil { + panic(e) + os.Exit(0) + } +} + +func iniRead(m map[string]string) { + f, err := os.Open("dxf2gcode.ini") + check(err) + defer f.Close() + scanner := bufio.NewScanner(f) + for scanner.Scan() { + line := scanner.Text() + parts := strings.Split(line, "=") + for range parts { + m[parts[0]] = parts[1] + } + } +} + +func getXcartesian(radius, angle float64) (coordinate float64){ + return radius * math.Cos(angle * (math.Pi / 180)) +} +func getYcartesian(radius, angle float64) (coordinate float64){ + return radius * math.Sin(angle * (math.Pi / 180)) +} + +func getLines(filename string) ([]string) { + lines := []string{} + f, err := os.Open(filename) + defer f.Close() + if err != nil { + fmt.Println(err) + os.Exit(1) + } + scanner := bufio.NewScanner(f) + scanner.Split(bufio.ScanLines) + inEntities := false + // extract all the lines of entities + for scanner.Scan() { + switch scanner.Text() { + case "ENTITIES": + inEntities = true + case "ENDSEC": + inEntities = false + } + if inEntities { + lines = append(lines, scanner.Text()) + } + } + return lines +} + +func getEnt(list []string, e []Ent) ([]Ent){ + // add error handling + group := "" + count := 0 + for i := range list { + if len(group) > 0 { + switch group { + case " 0": + if len(e) > 0 {count++} + e = append(e, Ent{}) + e[count].G0 = list[i] + case " 8": + e[count].G8 = list[i] + case " 10": + e[count].G10, _ = strconv.ParseFloat(list[i],64) + case " 11": + e[count].G11, _ = strconv.ParseFloat(list[i],64) + case " 20": + e[count].G20, _ = strconv.ParseFloat(list[i],64) + case " 21": + e[count].G21, _ = strconv.ParseFloat(list[i],64) + case " 30": + e[count].G30, _ = strconv.ParseFloat(list[i],64) + case " 31": + e[count].G31, _ = strconv.ParseFloat(list[i],64) + case " 40": + e[count].G40, _ = strconv.ParseFloat(list[i],64) + case " 50": + e[count].G50, _ = strconv.ParseFloat(list[i],64) + case " 51": + e[count].G51, _ = strconv.ParseFloat(list[i],64) + } + group = "" + } + switch list[i] { // trigger when a group is found + case " 0", " 8", " 10", " 11", " 20", " 21", + " 30", " 31", " 40", " 50", " 51": + group = list[i] + } + } + return e +} + +func findEndPoints (e []Ent) ([]Ent){ + // add error handling + for i := range e { + switch e[i].G0 { + case "ARC": // get the X and Y end points + e[i].Xs = getXcartesian(e[i].G40, e[i].G50) + e[i].G10 + e[i].Xe = getXcartesian(e[i].G40, e[i].G51) + e[i].G10 + e[i].Ys = getYcartesian(e[i].G40, e[i].G50) + e[i].G20 + e[i].Ye = getYcartesian(e[i].G40, e[i].G51) + e[i].G20 + case "LINE": + e[i].Xs = e[i].G10 + e[i].Ys = e[i].G20 + e[i].Zs = e[i].G30 + e[i].Xe = e[i].G11 + e[i].Ye = e[i].G21 + e[i].Zs = e[i].G31 + case "CIRCLE": // if it is a circle it must be the only entity on that layer + fmt.Println("Circle") + } + } + return e +} + +// find the matching start points for each entity and assign index +func findIndex(s int, t string, e []Ent) ([]Ent) { + // add error handling + xe := e[s].Xe + ye := e[s].Ye + index := 1 + tol, err := strconv.ParseFloat(t, 64) + check(err) + for skip, _ := range e { + if skip != s { + for i := range e { + if math.Abs(e[i].Xs - xe) < tol && math.Abs(e[i].Ys - ye) < tol { + e[i].Index = index + index++ + xe = e[i].Xe + ye = e[i].Ye + break + } + } + } + } + return e +} + +type Ent struct { + Index int + G0, G8 string + G10, G11, G20, G21, G30, G31, G40, G50, G51, + Xs, Xe, Ys, Ye, Zs, Ze float64 +} + +type ByIndex []Ent + +func (a ByIndex) Len() int { return len(a) } +func (a ByIndex) Swap(i, j int) { a[i], a[j] = a[j], a[i] } +func (a ByIndex) Less(i, j int) bool { return a[i].Index < a[j].Index } + +func genGcode (e []Ent, fileout string) { +/* +need to figure out if the start point of first entity and the end point +of the last entity are the same if so then make the last move to the +start point. +*/ + xo, yo := 0.0, 0.0 + feed := 25.0 + //outfile := "/home/john/linuxcnc/nc_files/output.ngc" + f, err := os.Create(fileout) + if err != nil { + fmt.Println(err) + os.Exit(1) + } + defer f.Close() + + fmt.Fprintf(f, "G0 X%f Y%f\n", e[0].Xs, e[0].Ys) + fmt.Fprintf(f, "F%.1f\n",feed) + for _, ent := range e { + switch ent.G0 { + case "LINE": + fmt.Fprintf(f, "G1 X%.4f Y%.4f\n", ent.G11, ent.G21) + case "ARC": + switch { + case ent.G50 <= 90.0: + xo = -(ent.Xs - ent.G10) + yo = -(ent.Ys - ent.G20) + case ent.G50 > 90 && ent.G50 <= 180.0: + xo = math.Abs(ent.Xs - ent.G10) + yo = -(ent.Ys - ent.G20) + case ent.G50 > 180 && ent.G50 <= 270.0: + xo = math.Abs(ent.Xs - ent.G10) + yo = math.Abs(ent.Ys - ent.G20) + case ent.G50 > 270 && ent.G50 <= 360.0: + xo = -(ent.Xs - ent.G10) + yo = -(ent.Ys - ent.G20) + } + fmt.Fprintf(f, "G3 X%.4f Y%.4f I%.4f J%.4f\n", ent.Xe, ent.Ye, xo, yo) + case "CIRCLE": + fmt.Println("Circle") + } + } + fmt.Fprintf(f, "M2") + fmt.Println("Processing Done.") +} + +func main(){ + iniMap := make(map[string]string) + var inFile string + if len(os.Args) == 2 { + switch os.Args[1]{ + case "-v": + fmt.Println("Version 0.001") + os.Exit(0) + default: + inFile = os.Args[1] + } + } else { + //inFile = "test.dxf" + fmt.Println("Usage is: dxf2g filename.ext") + fmt.Println("Usage is: dxf2g -v") + os.Exit(0) + } + iniRead(iniMap) + fmt.Println(iniMap) + fmt.Println(iniMap["SAVEAS"]) + var entities []Ent + lines := getLines(inFile) + entities = getEnt(lines, entities) + entities = findEndPoints(entities) + start := 1 + entities = findIndex(start, iniMap["TOLERANCE"], entities) + sort.Sort(ByIndex(entities)) + genGcode(entities, iniMap["SAVEAS"]) +} diff --git a/dxf2gcode.ini b/dxf2gcode.ini new file mode 100644 index 0000000..7a7f495 --- 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