在我的Android的OBJ装载机上帮助紫外线
https://stackoverflow.com/questions/4558220
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14-10-2019 - |
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我正在尝试制作我的第一个Android游戏，为此，我制作了一个OBJ加载程序，该加载程序使用资源ID并使用Context.GetResources（）。OpenRawRawResource（）返回的InputStream。
我设法阅读了顶点信息和面部信息，并且可以成功地加载网格而无需任何纹理。
看到问题是纹理未正确映射。我设法通过将“ VT”之后的所有数字放入数组以及第一个'/'（即'f 1/1 ...'）之后的索引来读取文件中的信息。
不过，我不确定我应该如何处理这些数字...如果我只是将所有内容都放入字节卷中并继续像我通常从这两个教程中学到的方式一样（杰威, ，和Nehe港口）它仍然会出错。
我的想法是，文件中的“ vt”信息是错误的（因此需要“ f”数据中的“/x”），我应该以某种方式按以某种方式将其放在数组....我不知道该怎么做:(
所以我问，有人可以给我一些帮助吗？我知道互联网上还有其他OBJ装载机，但是我已经做了这个，我知道它是如何工作的，不仅如此，而且对我来说是更好的学习体验。
这是我正在使用的代码：
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Vector;
import android.content.Context;
import android.util.Log;
import com.snakeinalake.catchthemoney.Mesh.CMeshInfo;
public class CMeshParserOBJ extends CMeshParser{
public CMeshParserOBJ(){
type = "OBJ";
}
@Override
public CMeshInfo loadMesh(Context context, int FileID){
CMeshInfo ret = new CMeshInfo(type);
String buildWord = "";
int data;
int found = -1;
Vector<Float> vert = new Vector<Float>();
Vector<Float> uv = new Vector<Float>();
Vector<Short> ind = new Vector<Short>();
Vector<Short> map = new Vector<Short>();
InputStream is = context.getResources().openRawResource(FileID);
InputStreamReader rd = new InputStreamReader(is);
try {
data = rd.read();
while(data!=-1){
char c = (char)data;
if(found == -1){
if(c == 'v'){ //found vertex data
data = rd.read();
if((char)data == ' '){
found = 1;
}else if((char)data == 't'){ //found uv map data
data = rd.read();
if((char)data == ' '){
found = 3;
}
}else{
found = -1;
}
}else if(c == 'f'){ //found index data (faces)
data = rd.read();
if((char)data == ' '){
found = 2;
}else{
found = -1;
}
}else{
found = -1;
}
}
if(found == 1){
float x = 0,y = 0,z = 0;
for(int repeat = 0; repeat<3; repeat++){
buildWord="";
do{
data = rd.read();
c = (char)data;
buildWord+=c;
}while((char)data!=' ' && (char)data!='\n');
if(repeat==0)
x = Float.parseFloat(buildWord.trim());
else if(repeat==1)
y = Float.parseFloat(buildWord.trim());
else if(repeat==2)
z = Float.parseFloat(buildWord.trim());
}
vert.add(x);
vert.add(y);
vert.add(z);
found = -1;
}
if(found == 2){
short v1 = 0, v2 = 0, v3 = 0;
short map1 = 0, map2 = 0, map3 = 0;
boolean uvdata = false;
for(int repeat = 0; repeat<3; repeat++){
buildWord="";
do{
data = rd.read();
if(!uvdata && (char)data == '/'){
uvdata = true;
}else{
c = (char)data;
buildWord+=c;
}
}while((char)data!=' ' && (char)data!='\n' && (char)data!='/');
if(repeat==0){
v1 = Short.parseShort(buildWord.trim());
}else if(repeat==1){
v2 = Short.parseShort(buildWord.trim());
}else if(repeat==2){
v3 = Short.parseShort(buildWord.trim());
}
if(uvdata){
uvdata = false;
buildWord = "";
do{
data = rd.read();
c = (char)data;
buildWord+=c;
if(!uvdata && (char)data == '/'){
uvdata = true;
}
}while((char)data!=' ' && (char)data!='\n');
if(repeat == 0)
map1 = Short.parseShort(buildWord.trim());
else if(repeat == 1)
map2 = Short.parseShort(buildWord.trim());
else if(repeat == 2)
map3 = Short.parseShort(buildWord.trim());
else{
map1 = 0; map2 = 0; map3 = 0;
}
}
}
ind.add(v1);
ind.add(v2);
ind.add(v3);
map.add(map1);
map.add(map2);
map.add(map3);
found = -1;
}
if(found == 3){
float uvx = 0, uvy = 0;
for(int repeat = 0; repeat<2; repeat++){
buildWord="";
do{
data = rd.read();
c = (char)data;
buildWord+=c;
}while((char)data!=' ' && (char)data!='\n');
if(repeat==0)
uvx = Float.parseFloat(buildWord.trim());
else if(repeat==1)
uvy = Float.parseFloat(buildWord.trim());
}
uv.add(uvx);
uv.add(uvy);
found = -1;
}
data = rd.read();
}
rd.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ret.vertices = new float[vert.size()];
for(int i=0; i<ret.vertices.length; i++){
ret.vertices[i] = vert.get(i);
Log.d("CATCH", Float.toString(ret.vertices[i]));
}
ret.uvMappings = new short[map.size()];
for(int i=0; i<ret.uvMappings.length; i++){
ret.uvMappings[i] = (short) (map.get(i)-1);
Log.d("CATCH", Float.toString(ret.uvMappings[i]));
}
ret.uvtex = new float[uv.size()];
for(int i=0; i<ret.uvtex.length; i++){
ret.uvtex[i] = uv.get(i);
Log.d("CATCH", Float.toString(ret.uvtex[i]));
}
ret.indices = new short[ind.size()];
for(int i=0; i<ret.indices.length; i++){
ret.indices[i] = (short) (ind.get(i)-1);
}
ret.MapUVCoordinates();
ret.fillBuffers();
return ret;
}}
方法“ ret.mapuvcoordiantes”不起作用，只是我自己订购它们的尝试...我不会发布它，因为它只是什么都没做。下面的方法“ ret.fullbuffers”。它只是从阵列中创建字节扣：
public void fillBuffers(){
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
ByteBuffer ibb = ByteBuffer.allocateDirect(indices.length * 2);
ByteBuffer ubb = ByteBuffer.allocateDirect(uvtex.length * 4);
Log.d("CMeshInfo::fillBuffers", Float.toString(vertices.length * 4));
Log.d("CMeshInfo::fillBuffers", Float.toString((indices.length * 2)));
Log.d("CMeshInfo::fillBuffers", Float.toString(uvtex.length * 4));
vbb.order(ByteOrder.nativeOrder()); //Vertices
ubb.order(ByteOrder.nativeOrder()); //UV coordinates
ibb.order(ByteOrder.nativeOrder()); //Indices
vertBuff = vbb.asFloatBuffer();
uvBuff = ubb.asFloatBuffer();
IndBuff = ibb.asShortBuffer();
vertBuff.put(vertices);
uvBuff.put(uvtex);
IndBuff.put(indices);
vertBuff.position(0);
uvBuff.position(0);
IndBuff.position(0);
}
解决方案
如果我没记错的话，这些数字是顶点阵列中的索引。
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