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* feat: simple binary stl writer added * feat: simple binary stl reader added * feat: simple ascii stl reader added --------- Co-authored-by: dennis.madsen <dennis.madsen@unibas.ch> Co-authored-by: Andreas Morel-Forster <Forster.Andreas@gmail.com>
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| package scalismo.io | ||
|
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| import java.io.RandomAccessFile | ||
| import java.nio.ByteBuffer | ||
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| object FileReader { | ||
| def readFileToByteBuffer(file: String): ByteBuffer = { | ||
| val raf = new RandomAccessFile(file, "r") | ||
| val channel = raf.getChannel | ||
| val buffer = ByteBuffer.allocate(channel.size.toInt) | ||
| channel.read(buffer) | ||
| buffer.rewind() | ||
| buffer | ||
| } | ||
| } |
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| /* | ||
| * Copyright 2015 University of Basel, Graphics and Vision Research Group | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package scalismo.io.stl | ||
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|
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| import scalismo.geometry.{EuclideanVector3D, Point3D} | ||
| import scalismo.mesh.TriangleMesh3D | ||
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| import java.io.{BufferedReader, FileReader} | ||
| import java.nio.ByteOrder | ||
| import scala.util.Try | ||
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| object STL { | ||
| // Binary numbers are assumed to be little-endian in the STL format. | ||
| private[stl] val STL_BYTE_ORDER = ByteOrder.LITTLE_ENDIAN | ||
| private[stl] val STL_HEADER_LENGTH = 80 | ||
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| def write(mesh: TriangleMesh3D, filename: String): Try[Unit] = { | ||
| STLMeshWriter.write(mesh, filename, "Scalismo generated STL File") | ||
| } | ||
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| def read(filename: String): Try[TriangleMesh3D] = { | ||
| val breader = new BufferedReader(new FileReader(filename)) | ||
| val fileType = breader.readLine().take(5) | ||
| if (fileType == "solid") { | ||
| STLMeshReaderAscii.read(filename) | ||
| } else { | ||
| STLMeshReaderBinary.read(filename) | ||
| } | ||
| } | ||
| } |
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| /* | ||
| * Copyright 2015 University of Basel, Graphics and Vision Research Group | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package scalismo.io.stl | ||
|
|
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| import scalismo.geometry.{EuclideanVector, EuclideanVector3D, Point3D} | ||
| import scalismo.mesh.TriangleMesh3D | ||
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| import java.io.{BufferedReader, FileReader, IOException} | ||
| import scala.collection.mutable.ArrayBuffer | ||
| import scala.util.Try | ||
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| object STLMeshReaderAscii { | ||
| def read(file: String): Try[TriangleMesh3D] = Try { | ||
| val breader = new BufferedReader(new FileReader(file)) | ||
| val header = breader.readLine() | ||
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| val triangles = ArrayBuffer.empty[STLTriangle] | ||
| var line: String = null | ||
| def hasLineToProcess: Boolean = { | ||
| line = breader.readLine(); | ||
| line != null && !line.trim.startsWith("endsolid") | ||
| } | ||
| while (hasLineToProcess) { | ||
| line = line.trim.replaceAll(" +", " ") | ||
| val triangleStrings: Array[String] = Array(line) ++ | ||
| (0 until 6).map(_ => breader.readLine().trim.replaceAll(" +", " ")).toArray | ||
| val triangle = parseTriangleStrings(triangleStrings) | ||
| triangles += triangle | ||
| } | ||
| breader.close() | ||
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| STLTriangle.STLTrianglesToTriangleMesh(triangles.toSeq) | ||
| } | ||
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| private def parseTriangleStrings(data: Seq[String]): STLTriangle = { | ||
| if (data.length != 7) { | ||
| throw new IOException("Wrong faces description format does not include all 7 descriptors.") | ||
| } | ||
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| checkTag(data(1), "outer loop") | ||
| checkTag(data(5), "endloop") | ||
| checkTag(data(6), "endfacet") | ||
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| STLTriangle( | ||
| parseNormalString(data(0)), | ||
| parseVertexString(data(2)), | ||
| parseVertexString(data(3)), | ||
| parseVertexString(data(4)) | ||
| ) | ||
| } | ||
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| private def checkTag(part: String, tag: String): Unit = { | ||
| if (!part.startsWith(tag)) { | ||
| throw new IOException(f"Wrong start of line, expected ${tag} but start is ${part.take(tag.length)}") | ||
| } | ||
| } | ||
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| private def splitChecked(part: String, tag: String, nElements: Int) = { | ||
| if (!part.startsWith(tag)) { | ||
| throw new IOException(f"Wrong identifier at beginning, expected ${tag} but start is ${part.take(tag.length)}") | ||
| } | ||
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| val parts = part.replace(tag, "").trim.split(" ") | ||
| if (parts.length != nElements) { | ||
| throw new IOException(f"Wrong number of elements for ${tag}. Found ${parts.length}, expected ${nElements}") | ||
| } | ||
| parts | ||
| } | ||
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| private def parseNormalString(part: String): EuclideanVector3D = { | ||
| val tag = "facet normal" | ||
| val expectedValues = 3 | ||
| val parts = splitChecked(part, tag, expectedValues).map(_.toDouble) | ||
| EuclideanVector3D(parts(0), parts(1), parts(2)) | ||
| } | ||
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| private def parseVertexString(part: String): Point3D = { | ||
| val tag = "vertex" | ||
| val expectedValues = 3 | ||
| val parts = splitChecked(part, tag, expectedValues).map(_.toDouble) | ||
| Point3D(parts(0), parts(1), parts(2)) | ||
| } | ||
| } |
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| /* | ||
| * Copyright 2015 University of Basel, Graphics and Vision Research Group | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package scalismo.io.stl | ||
|
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| import scalismo.geometry.Point3D | ||
| import scalismo.io.FileReader | ||
| import scalismo.io.stl.STL.{STL_BYTE_ORDER, STL_HEADER_LENGTH} | ||
| import scalismo.io.stl.STLTriangle | ||
| import scalismo.mesh.TriangleMesh3D | ||
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| import java.nio.ByteBuffer | ||
| import scala.util.Try | ||
|
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| object STLMeshReaderBinary { | ||
| def read(file: String): Try[TriangleMesh3D] = Try { | ||
| val dataBuffer = FileReader.readFileToByteBuffer(file) | ||
| dataBuffer.position(STL_HEADER_LENGTH).order(STL_BYTE_ORDER) | ||
|
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| val numTriangles = readInt(dataBuffer) | ||
| val trianglesArray = new Array[STLTriangle](numTriangles) | ||
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| val triangles = (0 until numTriangles).map { _ => | ||
| val n = readVertex(dataBuffer).toVector | ||
| val p1 = readVertex(dataBuffer) | ||
| val p2 = readVertex(dataBuffer) | ||
| val p3 = readVertex(dataBuffer) | ||
| readShort(dataBuffer) | ||
| STLTriangle(n, p1, p2, p3) | ||
| } | ||
| STLTriangle.STLTrianglesToTriangleMesh(triangles) | ||
| } | ||
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| private def readShort(bb: ByteBuffer): Short = { | ||
| bb.getShort | ||
| } | ||
|
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| private def readInt(bb: ByteBuffer): Int = { | ||
| bb.getInt | ||
| } | ||
|
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| private def readVertex(bb: ByteBuffer): Point3D = { | ||
| Point3D(readFloat(bb), readFloat(bb), readFloat(bb)) | ||
| } | ||
|
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| private def readFloat(bb: ByteBuffer): Float = { | ||
| bb.getFloat | ||
| } | ||
| } |
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