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70 lines
2.6 KiB
Python
70 lines
2.6 KiB
Python
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import os
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from sextante.parameters.ParameterMultipleInput import ParameterMultipleInput
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from sextante.grass.GrassUtils import GrassUtils
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from sextante.core.GeoAlgorithm import GeoAlgorithm
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from PyQt4 import QtGui
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from sextante.core.SextanteUtils import SextanteUtils
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import time
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class nviz(GeoAlgorithm):
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ELEVATION = "ELEVATION"
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VECTOR = "VECTOR"
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def getIcon(self):
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return QtGui.QIcon(os.path.dirname(__file__) + "/../images/grass.png")
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def defineCharacteristics(self):
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self.name = "nviz"
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self.group = "Visualization(NVIZ)"
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self.addParameter(ParameterMultipleInput(nviz.ELEVATION, "Elevation layers", ParameterMultipleInput.TYPE_RASTER, True))
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self.addParameter(ParameterMultipleInput(nviz.VECTOR, "Vector layers", ParameterMultipleInput.TYPE_VECTOR_ANY, True))
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def processAlgorithm(self, progress):
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commands = []
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command = "nviz"
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vector = self.getParameterValue(self.VECTOR);
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elevation = self.getParameterValue(self.ELEVATION);
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if vector:
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layers = vector.split(";")
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for layer in layers:
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newfilename = self.exportVectorLayer(layer)
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vector = vector.replace(layer, newfilename)
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command += (" vector=" + vector.replace(";", ","))
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if elevation:
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layers = elevation.split(";")
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for layer in layers:
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newfilename = self.exportRasterLayer(layer)
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elevation = elevation.replace(layer, newfilename)
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command += (" elevation=" + elevation.replace(";", ","))
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if elevation is None and vector is None:
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command += " -q"
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commands.append(command)
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GrassUtils.createTempMapset();
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GrassUtils.executeGrass(commands, progress)
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def getTempFilename(self):
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filename = "tmp" + str(time.time()).replace(".","") + str(SextanteUtils.getNumExportedLayers())
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return filename
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def exportVectorLayer(self,layer):
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destFilename = self.getTempFilename()
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command = "v.in.ogr"
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command += " min_area=-1"
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command +=" dsn=\"" + os.path.dirname(layer) + "\""
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command +=" layer=" + os.path.basename(layer)[:-4]
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command +=" output=" + destFilename;
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command +=" --overwrite -o"
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return destFilename
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def exportRasterLayer(self, layer):
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destFilename = self.getTempFilename()
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command = "r.in.gdal"
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command +=" input=\"" + layer + "\""
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command +=" band=1"
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command +=" out=" + destFilename;
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command +=" --overwrite -o"
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return destFilename
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