如何正确加载和绘制此*.obj？
如何正确加载和绘制此*.obj？
提问于 2013-11-16 17:38:16
我有一个用于*.obj文件的加载器类(称为GLModel)，它有两个主要方法-
public GLModel(BufferedReader ref, boolean centerit, GL gl,Texture texture)用于加载*.obj，以及
public void opengldraw(GL gl)用于在gl上绘制它。
到目前为止，我成功地加载和绘制了具有单个*.obj和纹理(如*.png、*jpg等)的对象。
但是我怎么能画出一个有多种纹理的物体呢？
例如- 这对象包含多个纹理，我尝试用合适的*.obj和其中一个纹理绘制它，得到了与上面的链接相同的形状，但它的纹理并不完全相同。
你能给我举一个如何正确使用它的例子吗？
编辑：
我在没有注册的情况下从这里下载了该模型。
到目前为止我得到的画是-
(前)-
(后)-
我说的装载机课是-
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.StringTokenizer;
import javax.media.opengl.GL;
import com.sun.opengl.util.texture.Texture;
// This class reads Wavefront .obj files
public class GLModel {
private ArrayList<float[]> vertexsets;
private ArrayList<float[]> vertexsetsnorms;
private ArrayList<float[]> vertexsetstexs;
private ArrayList<int[]> faces;
private ArrayList<int[]> facestexs;
private ArrayList<int[]> facesnorms;
private int objectlist;
private int numpolys;
public float toppoint;
public float bottompoint;
public float leftpoint;
public float rightpoint;
public float farpoint;
public float nearpoint;
Texture texture;
public GLModel(BufferedReader ref, boolean centerit, GL gl,
Texture texture){
this.texture=texture;
vertexsets = new ArrayList<float[]>();
vertexsetsnorms = new ArrayList<float[]>();
vertexsetstexs = new ArrayList<float[]>();
faces = new ArrayList<int[]>();
facestexs = new ArrayList<int[]>();
facesnorms = new ArrayList<int[]>();
numpolys = 0;
toppoint = 0.0F;
bottompoint = 0.0F;
leftpoint = 0.0F;
rightpoint = 0.0F;
farpoint = 0.0F;
nearpoint = 0.0F;
loadobject(ref);
if(centerit)
centerit();
opengldrawtolist(gl);
numpolys = faces.size();
cleanup();
}
public GLModel(BufferedReader ref, boolean centerit, GL gl){
vertexsets = new ArrayList<float[]>();
vertexsetsnorms = new ArrayList<float[]>();
vertexsetstexs = new ArrayList<float[]>();
faces = new ArrayList<int[]>();
facestexs = new ArrayList<int[]>();
facesnorms = new ArrayList<int[]>();
numpolys = 0;
toppoint = 0.0F;
bottompoint = 0.0F;
leftpoint = 0.0F;
rightpoint = 0.0F;
farpoint = 0.0F;
nearpoint = 0.0F;
loadobject(ref);
if(centerit)
centerit();
numpolys = faces.size();
cleanup();
}
private void cleanup(){
vertexsets.clear();
vertexsetsnorms.clear();
vertexsetstexs.clear();
faces.clear();
facestexs.clear();
facesnorms.clear();
}
@SuppressWarnings("unused")
private void loadobject(BufferedReader br){
int linecounter = 0;
int facecounter = 0;
try{
boolean firstpass = true;
String newline;
while((newline = br.readLine()) != null){
linecounter++;
if(newline.length() > 0){
newline = newline.trim();
//LOADS VERTEX COORDINATES
if(newline.startsWith("v ")){
float coords[] = new float[4];
newline = newline.substring(2, newline.length());
StringTokenizer st = new StringTokenizer(newline, " ");
for(int i = 0; st.hasMoreTokens(); i++)
coords[i] = Float.parseFloat(st.nextToken());
if(firstpass){
rightpoint = coords[0];
leftpoint = coords[0];
toppoint = coords[1];
bottompoint = coords[1];
nearpoint = coords[2];
farpoint = coords[2];
firstpass = false;
}
if(coords[0] > rightpoint)
rightpoint = coords[0];
if(coords[0] < leftpoint)
leftpoint = coords[0];
if(coords[1] > toppoint)
toppoint = coords[1];
if(coords[1] < bottompoint)
bottompoint = coords[1];
if(coords[2] > nearpoint)
nearpoint = coords[2];
if(coords[2] < farpoint)
farpoint = coords[2];
vertexsets.add(coords);
}
else
//LOADS VERTEX TEXTURE COORDINATES
if(newline.startsWith("vt")){
float coords[] = new float[4];
newline = newline.substring(3, newline.length());
StringTokenizer st = new StringTokenizer(newline, " ");
for(int i = 0; st.hasMoreTokens(); i++)
coords[i] = Float.parseFloat(st.nextToken());
vertexsetstexs.add(coords);
}
else
//LOADS VERTEX NORMALS COORDINATES
if(newline.startsWith("vn")){
float coords[] = new float[4];
newline = newline.substring(3, newline.length());
StringTokenizer st = new StringTokenizer(newline, " ");
for(int i = 0; st.hasMoreTokens(); i++)
coords[i] = Float.parseFloat(st.nextToken());
vertexsetsnorms.add(coords);
}
else
//LOADS FACES COORDINATES
if(newline.startsWith("f ")){
facecounter++;
newline = newline.substring(2, newline.length());
StringTokenizer st = new StringTokenizer(newline, " ");
int count = st.countTokens();
int v[] = new int[count];
int vt[] = new int[count];
int vn[] = new int[count];
for(int i = 0; i < count; i++){
char chars[] = st.nextToken().toCharArray();
StringBuffer sb = new StringBuffer();
char lc = 'x';
for(int k = 0; k < chars.length; k++){
if(chars[k] == '/' && lc == '/')
sb.append('0');
lc = chars[k];
sb.append(lc);
}
StringTokenizer st2 = new StringTokenizer
(sb.toString(), "/");
int num = st2.countTokens();
v[i] = Integer.parseInt(st2.nextToken());
if(num > 1)
vt[i] = Integer.parseInt(st2.nextToken());
else
vt[i] = 0;
if(num > 2)
vn[i] = Integer.parseInt(st2.nextToken());
else
vn[i] = 0;
}
faces.add(v);
facestexs.add(vt);
facesnorms.add(vn);
}
else
//LOADS MATERIALS
if (newline.charAt(0) == 'm' && newline.charAt(1) == 't' && newline.charAt(2) == 'l' && newline.charAt(3) == 'l' && newline.charAt(4) == 'i' && newline.charAt(5) == 'b') {}
else
//USES MATERIALS
if (newline.charAt(0) == 'u' && newline.charAt(1) == 's' && newline.charAt(2) == 'e' && newline.charAt(3) == 'm' && newline.charAt(4) == 't' && newline.charAt(5) == 'l') {}
}
}
}
catch(IOException e){
System.out.println("Failed to read file: " + br.toString());
}
catch(NumberFormatException e){
System.out.println("Malformed OBJ file: " + br.toString() + "\r \r"+ e.getMessage());
}
}
private void centerit(){
float xshift = (rightpoint - leftpoint) / 2.0F;
float yshift = (toppoint - bottompoint) / 2.0F;
float zshift = (nearpoint - farpoint) / 2.0F;
for(int i = 0; i < vertexsets.size(); i++){
float coords[] = new float[4];
coords[0] = ((float[])vertexsets.get(i))[0] - leftpoint - xshift;
coords[1] = ((float[])vertexsets.get(i))[1] - bottompoint - yshift;
coords[2] = ((float[])vertexsets.get(i))[2] - farpoint - zshift;
vertexsets.set(i, coords);
}
}
public float getXWidth(){
float returnval = 0.0F;
returnval = rightpoint - leftpoint;
return returnval;
}
public float getYHeight(){
float returnval = 0.0F;
returnval = toppoint - bottompoint;
return returnval;
}
public float getZDepth(){
float returnval = 0.0F;
returnval = nearpoint - farpoint;
return returnval;
}
public int numpolygons(){
return numpolys;
}
public void opengldrawtolist(GL gl){
// retrieving object list
this.objectlist = gl.glGenLists(1);
gl.glNewList(objectlist, GL.GL_COMPILE);
texture.enable();
texture.bind();
gl.glTexParameteri(GL.GL_TEXTURE_2D,GL.GL_TEXTURE_WRAP_T, GL.GL_REPEAT);
gl.glTexParameteri(GL.GL_TEXTURE_2D,GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
gl.glTexParameteri(GL.GL_TEXTURE_2D,GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D,GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
for (int i=0;i<faces.size();i++) {
int[] tempfaces = (int[])(faces.get(i));
int[] tempfacesnorms = (int[])(facesnorms.get(i));
int[] tempfacestexs = (int[])(facestexs.get(i));
//// Quad Begin Header ////
int polytype;
if (tempfaces.length == 3) {
polytype = GL.GL_TRIANGLES;
} else if (tempfaces.length == 4) {
polytype = GL.GL_QUADS;
} else {
polytype = GL.GL_POLYGON;
}
gl.glBegin(polytype);
for (int w=0;w<tempfaces.length;w++) {
if (tempfacesnorms[w] != 0) {
float normtempx = ((float[])vertexsetsnorms.get(tempfacesnorms[w] - 1))[0];
float normtempy = ((float[])vertexsetsnorms.get(tempfacesnorms[w] - 1))[1];
float normtempz = ((float[])vertexsetsnorms.get(tempfacesnorms[w] - 1))[2];
gl.glNormal3f(normtempx, normtempy, normtempz);
}
if (tempfacestexs[w] != 0) {
float textempx = ((float[])vertexsetstexs.get(tempfacestexs[w] - 1))[0];
float textempy = ((float[])vertexsetstexs.get(tempfacestexs[w] - 1))[1];
float textempz = ((float[])vertexsetstexs.get(tempfacestexs[w] - 1))[2];
gl.glTexCoord3f(textempx,1f-textempy,textempz);
}
float tempx = ((float[])vertexsets.get(tempfaces[w] - 1))[0];
float tempy = ((float[])vertexsets.get(tempfaces[w] - 1))[1];
float tempz = ((float[])vertexsets.get(tempfaces[w] - 1))[2];
gl.glVertex3f(tempx,tempy,tempz);
}
// Quad End
gl.glEnd();
}
gl.glEndList();
}
public void opengldraw(GL gl) {
gl.glCallList(objectlist);
}
public boolean collision(float[] position) {
return false;
}
public void setTexature(Texture tex) {
this.texture = tex;
}
}我使用的*.obj是- Zero.obj (在将其转换为BufferedReader之后)，我使用的图像是- AssassinBody_Dif.jpg (在将其转换为Texture之后)。
我要找的是-如何使用附加的GLModel类获得该模型的完整绘图?
回答 1
页面原文内容由Game Development提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://gamedev.stackexchange.com/questions/65956
复制相关文章
相似问题
添加站长 进交流群
领取专属 10元无门槛券
AI混元助手 在线答疑
关注 腾讯云开发者公众号
洞察 腾讯核心技术
剖析业界实践案例
腾讯云开发者
