Android中opengl es要实现Obj格式的3D导入

package com.example.objLoader; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.util.Vector; import android.content.Context; import android.util.Log; public class OBJParser { int numVertices=0; int numFaces=0; Context context; Vector<Short> faces=new Vector<Short>(); Vector<Short> vtPointer=new Vector<Short>(); Vector<Short> vnPointer=new Vector<Short>(); Vector<Float> v=new Vector<Float>(); Vector<Float> vn=new Vector<Float>(); Vector<Float> vt=new Vector<Float>(); Vector<TDModelPart> parts=new Vector<TDModelPart>(); Vector<Material> materials=null; public OBJParser(Context ctx){ context=ctx; } public TDModel parseOBJ(String fileName) { BufferedReader reader=null; String line = null; Material m=null; try { //try to open file reader = new BufferedReader(new InputStreamReader(new FileInputStream(fileName))); } catch(IOException e){ } try {//try to read lines of the file while((line = reader.readLine()) != null) { Log.v("obj",line); if(line.startsWith("f")){//a polygonal face processFLine(line); } else if(line.startsWith("vn")){ processVNLine(line); } else if(line.startsWith("vt")){ processVTLine(line); } else if(line.startsWith("v")){ //line having geometric position of single vertex processVLine(line); } /*else if(line.startsWith("usemtl")){ try{//start of new group if(faces.size()!=0){//if not this is not the start of the first group TDModelPart model=new TDModelPart(faces, vtPointer, vnPointer, m,vn); parts.add(model); } String mtlName=line.split("[ ]+",2)[1]; //get the name of the material for(int i=0; i<materials.size(); i++){//suppose .mtl file already parsed m=materials.get(i); if(m.getName().equals(mtlName)){//if found, return from loop break; } m=null;//if material not found, set to null } faces=new Vector<Short>(); vtPointer=new Vector<Short>(); vnPointer=new Vector<Short>(); } catch (Exception e) { // TODO: handle exception } } else if(line.startsWith("mtllib")){ materials=MTLParser.loadMTL(line.split("[ ]+")[1]); for(int i=0; i<materials.size(); i++){ Material mat=materials.get(i); Log.v("materials",mat.toString()); } }*/ } } catch(IOException e){ System.out.println("wtf..."); } if(faces!= null){//if not this is not the start of the first group TDModelPart model=new TDModelPart(faces, vtPointer, vnPointer, m,vn); parts.add(model); } TDModel t=new TDModel(v,vn,vt,parts); t.buildVertexBuffer(); Log.v("models",t.toString()); return t; } private void processVLine(String line){ String [] tokens=line.split("[ ]+"); //split the line at the spaces int c=tokens.length; for(int i=1; i<c; i++){ //add the vertex to the vertex array v.add(Float.valueOf(tokens[i])); } } private void processVNLine(String line){ String [] tokens=line.split("[ ]+"); //split the line at the spaces int c=tokens.length; for(int i=1; i<c; i++){ //add the vertex to the vertex array vn.add(Float.valueOf(tokens[i])); } } private void processVTLine(String line){ String [] tokens=line.split("[ ]+"); //split the line at the spaces int c=tokens.length; for(int i=1; i<c; i++){ //add the vertex to the vertex array vt.add(Float.valueOf(tokens[i])); } } private void processFLine(String line){ String [] tokens=line.split("[ ]+"); int c=tokens.length; if(tokens[1].matches("[0-9]+")){//f: v if(c==4){//3 faces for(int i=1; i<c; i++){ Short s=Short.valueOf(tokens[i]); s--; faces.add(s); } } else{//more faces Vector<Short> polygon=new Vector<Short>(); for(int i=1; i<tokens.length; i++){ Short s=Short.valueOf(tokens[i]); s--; polygon.add(s); } faces.addAll(Triangulator.triangulate(polygon));//triangulate the polygon and add the resulting faces } } if(tokens[1].matches("[0-9]+/[0-9]+")){//if: v/vt if(c==4){//3 faces for(int i=1; i<c; i++){ Short s=Short.valueOf(tokens[i].split("/")[0]); s--; faces.add(s); s=Short.valueOf(tokens[i].split("/")[1]); s--; vtPointer.add(s); } } else{//triangulate Vector<Short> tmpFaces=new Vector<Short>(); Vector<Short> tmpVt=new Vector<Short>(); for(int i=1; i<tokens.length; i++){ Short s=Short.valueOf(tokens[i].split("/")[0]); s--; tmpFaces.add(s); s=Short.valueOf(tokens[i].split("/")[1]); s--; tmpVt.add(s); } faces.addAll(Triangulator.triangulate(tmpFaces)); vtPointer.addAll(Triangulator.triangulate(tmpVt)); } } if(tokens[1].matches("[0-9]+//[0-9]+")){//f: v//vn if(c==4){//3 faces for(int i=1; i<c; i++){ Short s=Short.valueOf(tokens[i].split("//")[0]); s--; faces.add(s); s=Short.valueOf(tokens[i].split("//")[1]); s--; vnPointer.add(s); } } else{//triangulate Vector<Short> tmpFaces=new Vector<Short>(); Vector<Short> tmpVn=new Vector<Short>(); for(int i=1; i<tokens.length; i++){ Short s=Short.valueOf(tokens[i].split("//")[0]); s--; tmpFaces.add(s); s=Short.valueOf(tokens[i].split("//")[1]); s--; tmpVn.add(s); } faces.addAll(Triangulator.triangulate(tmpFaces)); vnPointer.addAll(Triangulator.triangulate(tmpVn)); } } if(tokens[1].matches("[0-9]+/[0-9]+/[0-9]+")){//f: v/vt/vn if(c==4){//3 faces for(int i=1; i<c; i++){ Short s=Short.valueOf(tokens[i].split("/")[0]); s--; faces.add(s); s=Short.valueOf(tokens[i].split("/")[1]); s--; vtPointer.add(s); s=Short.valueOf(tokens[i].split("/")[2]); s--; vnPointer.add(s); } } else{//triangulate Vector<Short> tmpFaces=new Vector<Short>(); Vector<Short> tmpVn=new Vector<Short>(); //Vector<Short> tmpVt=new Vector<Short>(); for(int i=1; i<tokens.length; i++){ Short s=Short.valueOf(tokens[i].split("/")[0]); s--; tmpFaces.add(s); //s=Short.valueOf(tokens[i].split("/")[1]); //s--; //tmpVt.add(s); //s=Short.valueOf(tokens[i].split("/")[2]); //s--; //tmpVn.add(s); } faces.addAll(Triangulator.triangulate(tmpFaces)); vtPointer.addAll(Triangulator.triangulate(tmpVn)); vnPointer.addAll(Triangulator.triangulate(tmpVn)); } } } }