// Writes the OMF header
func writeOmfHeader(out io.Writer, q *data.Slice) (err error) {
gridsize := q.Mesh().Size()
cellsize := q.Mesh().CellSize()
err = hdr(out, "OOMMF", "rectangular mesh v1.0")
hdr(out, "Segment count", "1")
hdr(out, "Begin", "Segment")
hdr(out, "Begin", "Header")
dsc(out, "Time", 0) //q.Time) // TODO !!
hdr(out, "Title", q.Tag())
hdr(out, "meshtype", "rectangular")
hdr(out, "meshunit", "m")
hdr(out, "xbase", cellsize[Z]/2)
hdr(out, "ybase", cellsize[Y]/2)
hdr(out, "zbase", cellsize[X]/2)
hdr(out, "xstepsize", cellsize[Z])
hdr(out, "ystepsize", cellsize[Y])
hdr(out, "zstepsize", cellsize[X])
hdr(out, "xmin", 0)
hdr(out, "ymin", 0)
hdr(out, "zmin", 0)
hdr(out, "xmax", cellsize[Z]*float64(gridsize[Z]))
hdr(out, "ymax", cellsize[Y]*float64(gridsize[Y]))
hdr(out, "zmax", cellsize[X]*float64(gridsize[X]))
hdr(out, "xnodes", gridsize[Z])
hdr(out, "ynodes", gridsize[Y])
hdr(out, "znodes", gridsize[X])
hdr(out, "ValueRangeMinMag", 1e-08) // not so "optional" as the OOMMF manual suggests...
hdr(out, "ValueRangeMaxMag", 1) // TODO
hdr(out, "valueunit", "?")
hdr(out, "valuemultiplier", 1)
hdr(out, "End", "Header")
return
}
func writeVTKCellData(out io.Writer, q *data.Slice, dataformat string) (err error) {
N := q.NComp()
data := q.Tensors()
switch N {
case 1:
fmt.Fprintf(out, "\t\t\t<PointData Scalars=\"%s\">\n", q.Tag())
fmt.Fprintf(out, "\t\t\t\t<DataArray type=\"Float32\" Name=\"%s\" NumberOfComponents=\"%d\" format=\"%s\">\n\t\t\t\t\t", q.Tag(), N, dataformat)
case 3:
fmt.Fprintf(out, "\t\t\t<PointData Vectors=\"%s\">\n", q.Tag())
fmt.Fprintf(out, "\t\t\t\t<DataArray type=\"Float32\" Name=\"%s\" NumberOfComponents=\"%d\" format=\"%s\">\n\t\t\t\t\t", q.Tag(), N, dataformat)
case 6, 9:
fmt.Fprintf(out, "\t\t\t<PointData Tensors=\"%s\">\n", q.Tag())
fmt.Fprintf(out, "\t\t\t\t<DataArray type=\"Float32\" Name=\"%s\" NumberOfComponents=\"%d\" format=\"%s\">\n\t\t\t\t\t", q.Tag(), 9, dataformat) // must be 9!
default:
log.Fatalf("vtk: cannot handle %v components", N)
}
gridsize := q.Mesh().Size()
switch dataformat {
case "ascii":
for i := 0; i < gridsize[X]; i++ {
for j := 0; j < gridsize[Y]; j++ {
for k := 0; k < gridsize[Z]; k++ {
// if symmetric tensor manage it appart to write the full 9 components
if N == 6 {
fmt.Fprint(out, data[swapIndex(0, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(1, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(2, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(1, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(3, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(4, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(2, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(4, 9)][i][j][k], " ")
fmt.Fprint(out, data[swapIndex(5, 9)][i][j][k], " ")
} else {
for c := 0; c < N; c++ {
fmt.Fprint(out, data[swapIndex(c, N)][i][j][k], " ")
}
}
}
}
}
case "binary":
// Inlined for performance, terabytes of data will pass here...
buffer := new(bytes.Buffer)
for i := 0; i < gridsize[X]; i++ {
for j := 0; j < gridsize[Y]; j++ {
for k := 0; k < gridsize[Z]; k++ {
// if symmetric tensor manage it appart to write the full 9 components
if N == 6 {
binary.Write(buffer, binary.LittleEndian, data[swapIndex(0, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(1, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(2, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(1, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(3, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(4, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(2, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(4, 9)][i][j][k])
binary.Write(buffer, binary.LittleEndian, data[swapIndex(5, 9)][i][j][k])
} else {
for c := 0; c < N; c++ {
binary.Write(buffer, binary.LittleEndian, data[swapIndex(c, N)][i][j][k])
}
}
}
}
}
b64len := uint32(len(buffer.Bytes()))
bufLen := new(bytes.Buffer)
binary.Write(bufLen, binary.LittleEndian, b64len)
base64out := base64.NewEncoder(base64.StdEncoding, out)
base64out.Write(bufLen.Bytes())
base64out.Write(buffer.Bytes())
base64out.Close()
default:
panic(fmt.Errorf("vtk: illegal data format " + dataformat + ". Options are: ascii, binary"))
}
fmt.Fprintln(out, "\n\t\t\t\t</DataArray>")
fmt.Fprintln(out, "\t\t\t</PointData>")
return
}
func writeOvf2Header(out io.Writer, q *data.Slice, time, tstep float64) {
gridsize := q.Mesh().Size()
cellsize := q.Mesh().CellSize()
fmt.Fprintln(out, "# OOMMF OVF 2.0")
fmt.Fprintln(out, "#")
hdr(out, "Segment count", "1")
fmt.Fprintln(out, "#")
hdr(out, "Begin", "Segment")
hdr(out, "Begin", "Header")
fmt.Fprintln(out, "#")
hdr(out, "Title", q.Tag()) // TODO
hdr(out, "meshtype", "rectangular")
hdr(out, "meshunit", "m")
hdr(out, "xmin", 0)
hdr(out, "ymin", 0)
hdr(out, "zmin", 0)
hdr(out, "xmax", cellsize[Z]*float64(gridsize[Z]))
hdr(out, "ymax", cellsize[Y]*float64(gridsize[Y]))
hdr(out, "zmax", cellsize[X]*float64(gridsize[X]))
name := q.Tag()
var labels []interface{}
if q.NComp() == 1 {
labels = []interface{}{name}
} else {
for i := 0; i < q.NComp(); i++ {
labels = append(labels, name+"_"+string('x'+i))
}
}
hdr(out, "valuedim", q.NComp())
hdr(out, "valuelabels", labels...) // TODO
unit := q.Unit()
if unit == "" {
unit = "1"
}
if q.NComp() == 1 {
hdr(out, "valueunits", unit)
} else {
hdr(out, "valueunits", unit, unit, unit)
}
// We don't really have stages
fmt.Fprintln(out, "# Desc: Stage simulation time: ", tstep, " s")
fmt.Fprintln(out, "# Desc: Total simulation time: ", time, " s")
hdr(out, "xbase", cellsize[Z]/2)
hdr(out, "ybase", cellsize[Y]/2)
hdr(out, "zbase", cellsize[X]/2)
hdr(out, "xnodes", gridsize[Z])
hdr(out, "ynodes", gridsize[Y])
hdr(out, "znodes", gridsize[X])
hdr(out, "xstepsize", cellsize[Z])
hdr(out, "ystepsize", cellsize[Y])
hdr(out, "zstepsize", cellsize[X])
fmt.Fprintln(out, "#")
hdr(out, "End", "Header")
fmt.Fprintln(out, "#")
}