我一直在关注nehe's tutorial我想补充一点。我想为不同的对象赋予不同的纹理。
这是我的立方体(Dokukup)，我将在渲染器部分绘制它。它有顶点和坐标，也有我打算在运行时改变它的默认纹理。这是我的 Tus 类几乎相同的代码。
public class DokuKup {
private FloatBuffer koseArabellek; // Buffer for vertex-array
private FloatBuffer dokuArabellek;
private float[] koseler = { // koseler for a face at z=0
-1.0f, -1.0f, 0.0f, // 0. left-bottom-front
1.0f, -1.0f, 0.0f, // 1. right-bottom-front
-1.0f, 1.0f, 0.0f, // 2. left-top-front
1.0f, 1.0f, 0.0f // 3. right-top-front
};
float[] konac={
0.0f, 1.0f, //A. sol alt
1.0f, 1.0f, //B. sag alt
0.0f, 0.0f, //C sol üst
1.0f, 0.0f //D sag üst
};
int[] dokuKunyeleri = new int[1]; //1 doku kunyeleri için katar
public int doku=R.drawable.duvar1;
private float[][] renkler = { // renkler of the 6 faces
{1.0f, 0.5f, 0.0f, 1.0f}, // 0. orange
{1.0f, 0.0f, 1.0f, 1.0f}, // 1. violet
{0.0f, 1.0f, 0.0f, 1.0f}, // 2. green
{0.0f, 0.0f, 1.0f, 1.0f}, // 3. blue
{1.0f, 0.0f, 0.0f, 1.0f}, // 4. red
{1.0f, 1.0f, 0.0f, 1.0f} // 5. yellow
};
public DokuKup() {
ByteBuffer kka = ByteBuffer.allocateDirect(koseler.length * 4);
kka.order(ByteOrder.nativeOrder()); //yerel sıralama kullanalım
koseArabellek = kka.asFloatBuffer();//byte tipinden float tipine çevirelim
koseArabellek.put(koseler); //verilerimizi ara belleğe eşleyelim
koseArabellek.position(0); //rewind işlemi yapalım
//doku konaç konumlarını katara float tipinde atalım, bir float 4 byte eder
ByteBuffer dka= ByteBuffer.allocateDirect(konac.length*4);
dka.order(ByteOrder.nativeOrder());
dokuArabellek=dka.asFloatBuffer();
dokuArabellek.put(konac);
dokuArabellek.position(0);
}
//cizdirelim şekli
public void ciz(GL10 gl) {
gl.glFrontFace(GL10.GL_CCW); //ön yüz saat döngüsünün tersine
gl.glEnable(GL10.GL_CULL_FACE); //yüz toplamayı aç
gl.glCullFace(GL10.GL_BACK); //arka yüzü topla
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, koseArabellek);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); //doku konaç katarını seçilir kıl
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, dokuArabellek); //doku konaç katarını tanımla
// front
gl.glPushMatrix();
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[0][0], renkler[0][1], renkler[0][2], renkler[0][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
// left
gl.glPushMatrix();
gl.glRotatef(270.0f, 0.0f, 1.0f, 0.0f);
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[1][0], renkler[1][1], renkler[1][2], renkler[1][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
// back
gl.glPushMatrix();
gl.glRotatef(180.0f, 0.0f, 1.0f, 0.0f);
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[2][0], renkler[2][1], renkler[2][2], renkler[2][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
// right
gl.glPushMatrix();
gl.glRotatef(90.0f, 0.0f, 1.0f, 0.0f);
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[3][0], renkler[3][1], renkler[3][2], renkler[3][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
// top
gl.glPushMatrix();
gl.glRotatef(270.0f, 1.0f, 0.0f, 0.0f);
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[4][0], renkler[4][1], renkler[4][2], renkler[4][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
// bottom
gl.glPushMatrix();
gl.glRotatef(90.0f, 1.0f, 0.0f, 0.0f);
gl.glTranslatef(0.0f, 0.0f, 1.0f);
//gl.glColor4f(renkler[5][0], renkler[5][1], renkler[5][2], renkler[5][3]);
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
gl.glPopMatrix();
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); //doku konaç akatarını devre dışı bırak
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisable(GL10.GL_CULL_FACE);
}
//GL dokusuna bir görsel yükle
public void dokuYukle(GL10 gl, Context context){
gl.glGenTextures(1, dokuKunyeleri,0); //doku künye katarı üret
gl.glBindTexture(GL10.GL_TEXTURE_2D, dokuKunyeleri[0]); //künyeyi bağla
//doku süzgeçlerini kuralım
//nden 3d değil?neden GL10?GL_TEXTURE_2D nedir?
//GL_TEXTURE_MIN_FILTER: the texture minifying function is used whenever the pixel being textured maps to an area greater than one texture element.
//GL_TEXTURE_MAG_FILTER: The texture magnification function is used when the pixel being textured maps to an area less than or equal to one texture element.
//GL_NEAREST: Returns the value of the texture element that is nearest (in Manhattan distance) to the center of the pixel being textured.
//GL_LINEAR: Returns the weighted average of the four texture elements that are closest to the center of the pixel being textured.
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_REPEAT);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT);
//"res\drawable\alp.png" den doku görseline bir girdi akışı oluşturalım ,256x256 olmalı
InputStream istream = context.getResources().openRawResource(doku);
Bitmap bitmap;
try{
//girdiyi okuyup bitmap olarak çöz
bitmap= BitmapFactory.decodeStream(istream);
}finally{
try{
istream.close();
}catch (Exception e) {
}
}
//şu anda bağlı olan doku künyesi için , yüklü bitmapden doku oluşştur
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
和我在渲染器中的代码:
public class MyGLRenderer implements GLSurfaceView.Renderer {
Context context; //App context
//sekillerimiz
Kare dortgen1,dortgen2;
Taban taban;
private Kup kup1,kup2;
private DokuKup dokukup,dokukupSag,dokukupSol;
private DokuKup1 dokukup1;
private ArrayList<DokuKup> sagKupler,solKupler;
public Tus tusYukari,tusAsagi;
//dondurme
float xAcisi =0;
float yAcisi=0;
float xHizi =0;
float yHizi =0;
float z= -6.0f;//cisimlerin kameraya olan uzaklığı
float xKonum=0,zKonum=0;
//daha sonrasında buyutme
float xBoyutu,yBoyutu,zBoyutu;
int A,B,C,F;
int H=3;
int G=4;
int D=20;
int E1=D/H;
int E2=D/G;
//tus konumlari
//float tusX=-6,tusYukariY=3,tusAsagiY=-3;
//isiklandirma
boolean isikAc=true;
private float[] lightAmbient = {0.5f, 0.5f, 0.5f, 1.0f};
private float[] lightDiffuse = {1.0f, 1.0f, 1.0f, 1.0f};
private float[] lightPosition = {0.0f, 0.0f, 2.0f, 1.0f};
//private static float kupAcisi=0,kupHizi=-1.5f;//küp için döngü açısı ve hızı
int currentTextrueFilter=0;
public MyGLRenderer(Context context){
this.context=context;
dokukup1= new DokuKup1();
dortgen1= new Kare();
dortgen2= new Kare();
kup1= new Kup();
kup2= new Kup();
dokukup=new DokuKup();
dokukupSag=new DokuKup();
dokukupSol = new DokuKup();
sagKupler= new ArrayList<DokuKup>();
solKupler= new ArrayList<DokuKup>();
taban= new Taban();
dokukup.doku=R.drawable.alp;//farklı gözüksün
//burada verelim Tuş konumlarini
float width=256,height=256;
tusYukari = new Tus(tusX, tusYukariY, width, height);
tusAsagi = new Tus(tusX, tusAsagiY, width, height);
tusAsagi.doku = R.drawable.down_button;
}
@Override
public void onDrawFrame(GL10 gl) {
//clear color and depth buffers using clear value set earlier
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
//isik acikmi?
if(isikAc){
gl.glEnable(GL10.GL_LIGHTING);
}else{
gl.glDisable(GL10.GL_LIGHTING);
}
//y asagi yukari z öne geriye, x sağa sola
/*
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, z);
gl.glRotatef(xAcisi, 1.0f, 0.0f, 0.0f);
gl.glRotatef(yAcisi, 0.0f, 1.0f, 0.0f);
dokukup.ciz(gl);
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, z);
gl.glTranslatef(0.0f, (float)(F/2 + (int)(F-0.5)/2), -(D/2));//+1-(int)((F+0.5)/2)
gl.glScalef(A, F, D/2 -2+1);//(float)(A/2)-1
gl.glRotatef(xAcisi, 1.0f, 0.0f, 0.0f);
gl.glRotatef(yAcisi, 0.0f, 1.0f, 0.0f);
dokukup.ciz(gl);
*/
gl.glLoadIdentity();
gl.glScalef(0.05f, 0.05f, 0.05f);
gl.glTranslatef(0.0f, 0.0f, z-zKonum);
gl.glRotatef(xAcisi, 1.0f, 0.0f, 0.0f);
gl.glRotatef(yAcisi, 0.0f, 1.0f, 0.0f);
dokukup.ciz(gl);
//hizini her her kare(frame) de yenilediğinde güncelliyoruz
xAcisi+=xHizi;
yAcisi+=yHizi;
//tuslari bastiralim
gl.glLoadIdentity();
gl.glTranslatef(3.6f, -1.5f, z);
tusYukari.ciz(gl);
gl.glLoadIdentity();
gl.glTranslatef(2.5f, -1.5f, z);
tusAsagi.ciz(gl);
}
void boyutAta(int a,int b,int c,int d,int f,int g,int h){
A=a;B=b;C=c;D=d;F=f;G=g;H=h;
E1=D/H;
E2=D/G;
xBoyutu=d;
yBoyutu=f;
zBoyutu=a;
}
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
if(height == 0) height=1; //to prevent divide by zero.
float aspect = (float) width/height;
//set the viewport (display area) to cover the entire window
gl.glViewport(0, 0, width, height);
//Setup perspective projection, with aspect ratio mathces viewport
gl.glMatrixMode(GL10.GL_PROJECTION); //select projection matrix
gl.glLoadIdentity(); //reset projection matrix
//use perspective projection
GLU.gluPerspective(gl, 45, aspect, 0.1f, 100.f);
gl.glMatrixMode(GL10.GL_MODELVIEW); //select model-view matrix
gl.glLoadIdentity(); //reset
}
//Call back when the surface is first or re created
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);// Set color's clear-value to black
gl.glClearDepthf(1.0f); //Set Depth's clear value to farthest
gl.glEnable(GL10.GL_DEPTH_TEST); //enables depth-buffer for hidden surface removal
gl.glDepthFunc(GL10.GL_LEQUAL); //The type of depth testing to do
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST); //nice perspective view
gl.glShadeModel(GL10.GL_SMOOTH); //enable smooth shading of color
gl.glDisable(GL10.GL_DITHER); //disable dithering for better performance
//yüzey her oluşturluduğunda doku kurulmalı
dokukup.dokuYukle(gl, context);
gl.glEnable(GL10.GL_TEXTURE_2D);
// ambient ve diffuse ile isiklari acalim
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_AMBIENT, lightAmbient, 0);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_DIFFUSE, lightDiffuse, 0);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_POSITION, lightPosition, 0);
gl.glEnable(GL10.GL_LIGHT1); // isiklandirmayi ac
gl.glEnable(GL10.GL_LIGHT0); // varasyilan isik ata
}
}
再一次，我的问题是只有 1 个纹理映射到所有不同的对象，我想在不同的对象上映射不同的纹理。
编辑:我相信这一定与此有关，但我找不到解决方案。
textureCube.textureLoad(gl, context);
最佳答案
在绘制相应的对象时，必须生成两个纹理并将它们绑定(bind)。
我看到您只创建了一个:gl.glGenTextures(1, dokuKunyeleri,0);。事实上，你应该创建两个:
int[] dokuKunyeleri = new int[2];
gl.glGenTextures(2, dokuKunyeleri, 0);
然后，在绘制对象时，应该在绘制相关对象之前绑定(bind)相关纹理:
public void ciz(GL10 gl) {
glBindTexture(GL_TEXTURE_2D, dokuKunyeleri[0 or 1]);
[...] // draw the object
}
顺便说一下，我认为您并不需要 DokuKup.ciz 中的所有这些东西:
gl.glFrontFace(GL10.GL_CCW); //ön yüz saat döngüsünün tersine
gl.glEnable(GL10.GL_CULL_FACE); //yüz toplamayı aç
gl.glCullFace(GL10.GL_BACK); //arka yüzü topla
因为您随后要禁用它们。所以你应该把它们放在 MyGlRenderer.onSurfaceCreated 中。
关于android - 不同物体的不同纹理，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21474759/