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finished coding obj parsing
1 parent 25981cb commit 9ef9587

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Lines changed: 143 additions & 20 deletions

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‎android/core/src/processing/core/PShape3D.java‎

Lines changed: 143 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -1714,8 +1714,8 @@ protected BufferedReader getBufferedReader(String filename) {
17141714

17151715

17161716
protected void parseOBJ(BufferedReader reader, ArrayList<PVector> vertices, ArrayList<PVector> normals, ArrayList<PVector> textures, ArrayList<OBJFace> faces, ArrayList<OBJMaterial> materials) {
1717-
Hashtable<String, Integer> mtlHash = new Hashtable<String, Integer>();
1718-
1717+
Hashtable<String, Integer> materialsHash = new Hashtable<String, Integer>();
1718+
int mtlIdxCur = -1;
17191719
try {
17201720
// Parse the line.
17211721

@@ -1760,32 +1760,130 @@ protected void parseOBJ(BufferedReader reader, ArrayList<PVector> vertices, Arra
17601760
// Object name is ignored, for now.
17611761
} else if (elements[0].equals("mtllib")) {
17621762
if (elements[1] != null) {
1763-
parseMTL(getBufferedReader(elements[1]), materials, mtlHash);
1763+
parseMTL(getBufferedReader(elements[1]), materials, materialsHash);
17641764
}
17651765
} else if (elements[0].equals("g")) {
17661766
// Grouping is ignored, for now. Groups are automaticallty generated during recording by the triangulator.
17671767
} else if (elements[0].equals("usemtl")) {
1768-
1768+
// Getting material index for the material set for use.
1769+
if (elements[1] != null) {
1770+
String mtlname = elements[1];
1771+
if (materialsHash.containsKey(mtlname)) {
1772+
Integer tmpInt = materialsHash.get(mtlname);
1773+
mtlIdxCur = tmpInt.intValue();
1774+
} else {
1775+
mtlIdxCur = -1;
1776+
}
1777+
}
17691778
} else if (elements[0].equals("f")) {
1770-
// face setting
1779+
// Face setting
1780+
OBJFace face = new OBJFace();
1781+
face.matIdx = mtlIdxCur;
1782+
1783+
for (int i = 1; i < elements.length; i++) {
1784+
String seg = elements[i];
1785+
1786+
if (seg.indexOf("/") > 0) {
1787+
String[] forder = seg.split("/");
1788+
1789+
if (forder.length > 2) {
1790+
if (forder[0].length() > 0) {
1791+
face.vertIdx.add(Integer.valueOf(forder[0]));
1792+
}
1793+
1794+
if (forder[1].length() > 0) {
1795+
face.texIdx.add(Integer.valueOf(forder[1]));
1796+
}
1797+
1798+
if (forder[2].length() > 0) {
1799+
face.normIdx.add(Integer.valueOf(forder[2]));
1800+
// f.normals.add(getVertex(Integer.valueOf(forder[2])));
1801+
}
1802+
} else if (forder.length > 1) {
1803+
if (forder[0].length() > 0) {
1804+
face.vertIdx.add(Integer.valueOf(forder[0]));
1805+
}
1806+
1807+
if (forder[1].length() > 0) {
1808+
face.texIdx.add(Integer.valueOf(forder[1]));
1809+
}
1810+
} else if (forder.length > 0) {
1811+
if (forder[0].length() > 0) {
1812+
face.vertIdx.add(Integer.valueOf(forder[0]));
1813+
}
1814+
}
1815+
} else {
1816+
if (seg.length() > 0) {
1817+
face.vertIdx.add(Integer.valueOf(seg));
1818+
}
1819+
}
1820+
}
1821+
1822+
faces.add(face);
1823+
17711824
}
17721825
}
17731826
}
1827+
1828+
if (materials.size() == 0) {
1829+
// No materials definition so far. Adding one default material.
1830+
OBJMaterial defMtl = new OBJMaterial();
1831+
materials.add(defMtl);
1832+
}
17741833

17751834
} catch (Exception e) {
17761835
e.printStackTrace();
17771836
}
17781837
}
17791838

17801839

1781-
protected void parseMTL(BufferedReader reader, ArrayList<OBJMaterial> materials, Hashtable<String, Integer> mtlHash) {
1840+
protected void parseMTL(BufferedReader reader, ArrayList<OBJMaterial> materials, Hashtable<String, Integer> materialsHash) {
17821841
try {
17831842
String line;
1843+
OBJMaterial currentMtl = null;
1844+
while ((line = reader.readLine()) != null) {
1845+
// Parse the line
1846+
line = line.trim();
17841847

1785-
//Material currentMtl = null;
1848+
String elements[] = line.split("\\s+");
17861849

1787-
while ((line = reader.readLine()) != null) {
1788-
1850+
if (elements.length > 0) {
1851+
// Extract the material data.
1852+
1853+
if (elements[0].equals("newmtl")) {
1854+
// Starting new material.
1855+
String mtlname = elements[1];
1856+
currentMtl = new OBJMaterial(mtlname);
1857+
materialsHash.put(mtlname, new Integer(materials.size()));
1858+
materials.add(currentMtl);
1859+
} else if (elements[0].equals("map_Kd") && elements.length > 1) {
1860+
// Loading texture map.
1861+
String texname = elements[1];
1862+
currentMtl.kdMap = parent.loadImage(texname);
1863+
} else if (elements[0].equals("Ka") && elements.length > 3) {
1864+
// The ambient color of the material
1865+
currentMtl.ka.x = Float.valueOf(elements[1]).floatValue();
1866+
currentMtl.ka.y = Float.valueOf(elements[2]).floatValue();
1867+
currentMtl.ka.z = Float.valueOf(elements[3]).floatValue();
1868+
} else if (elements[0].equals("Kd") && elements.length > 3) {
1869+
// The diffuse color of the material
1870+
currentMtl.kd.x = Float.valueOf(elements[1]).floatValue();
1871+
currentMtl.kd.y = Float.valueOf(elements[2]).floatValue();
1872+
currentMtl.kd.z = Float.valueOf(elements[3]).floatValue();
1873+
} else if (elements[0].equals("Ks") && elements.length > 3) {
1874+
// The specular color weighted by the specular coefficient
1875+
currentMtl.ks.x = Float.valueOf(elements[1]).floatValue();
1876+
currentMtl.ks.y = Float.valueOf(elements[2]).floatValue();
1877+
currentMtl.ks.z = Float.valueOf(elements[3]).floatValue();
1878+
} else if ((elements[0].equals("d") || elements[0].equals("Tr")) && elements.length > 1) {
1879+
// Reading the alpha transparency.
1880+
currentMtl.d = Float.valueOf(elements[1]).floatValue();
1881+
} else if (elements[0].equals("ns") && elements.length > 1) {
1882+
// The specular component of the Phong shading model
1883+
currentMtl.ns = Float.valueOf(elements[1]).floatValue();
1884+
}
1885+
1886+
}
17891887
}
17901888
} catch (Exception e) {
17911889
e.printStackTrace();
@@ -1816,22 +1914,43 @@ protected void recordOBJ(ArrayList<PVector> vertices, ArrayList<PVector> normals
18161914
// Recording current face.
18171915
a3d.beginShape();
18181916
for (int j = 0; j < face.vertIdx.size(); j++){
1819-
int vertIdx = face.vertIdx.get(j).intValue() - 1;
1820-
int normIdx = face.normIdx.get(j).intValue() - 1;
1821-
PVector vert = (PVector) vertices.get(vertIdx);
1822-
PVector norms = (PVector) normals.get(normIdx);
1917+
int vertIdx, normIdx;
1918+
PVector vert, norms;
1919+
1920+
vert = norms = null;
1921+
1922+
vertIdx = face.vertIdx.get(j).intValue() - 1;
1923+
vert = (PVector) vertices.get(vertIdx);
1924+
1925+
if (j < face.normIdx.size()) {
1926+
normIdx = face.normIdx.get(j).intValue() - 1;
1927+
norms = (PVector) normals.get(normIdx);
1928+
}
18231929

18241930
if (mtl != null && mtl.kdMap != null) {
18251931
// This face is textured.
1826-
int texIdx = face.texIdx.get(j).intValue() - 1;
1827-
PVector tex = (PVector) textures.get(texIdx);
1932+
int texIdx;
1933+
PVector tex = null;
1934+
1935+
if (j < face.texIdx.size()) {
1936+
texIdx = face.texIdx.get(j).intValue() - 1;
1937+
tex = (PVector) textures.get(texIdx);
1938+
}
18281939

18291940
a3d.texture(mtl.kdMap);
1830-
a3d.normal(norms.x, norms.y, norms.z);
1831-
a3d.vertex(vert.x, vert.y, vert.z, tex.x, tex.y);
1941+
if (norms != null) {
1942+
a3d.normal(norms.x, norms.y, norms.z);
1943+
}
1944+
if (tex != null) {
1945+
a3d.vertex(vert.x, vert.y, vert.z, tex.x, tex.y);
1946+
} else {
1947+
a3d.vertex(vert.x, vert.y, vert.z);
1948+
}
18321949
} else {
18331950
// This face is not textured.
1834-
a3d.normal(norms.x, norms.y, norms.z);
1951+
if (norms != null) {
1952+
a3d.normal(norms.x, norms.y, norms.z);
1953+
}
18351954
a3d.vertex(vert.x, vert.y, vert.z);
18361955
}
18371956
}
@@ -1865,13 +1984,17 @@ protected class OBJMaterial {
18651984
PImage kdMap;
18661985

18671986
OBJMaterial() {
1868-
name = "default";
1987+
this("default");
1988+
}
1989+
1990+
OBJMaterial(String name) {
1991+
this.name = name;
18691992
ka = new PVector(0.5f, 0.5f, 0.5f);
18701993
kd = new PVector(0.5f, 0.5f, 0.5f);
18711994
ks = new PVector(0.5f, 0.5f, 0.5f);
18721995
d = 1.0f;
18731996
ns = 0.0f;
18741997
kdMap = null;
1875-
}
1998+
}
18761999
}
18772000
}

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