白色正方形纹理Opengl-es Android

Question

我目前得到的只是一个彩色的正方形，我的纹理应该绘制。

我已经确定纹理的大小为2 (128 x 128)

我已经像建议的那样把纹理放在draw_nodpi文件夹中，但我仍然得到一个白色的(或其他相应的颜色)正方形。

这是我的正方形对象代码:

public class MTestSquare {


private float vertices[] = {
        0.0f, 1.0f, 0.0f,
        0.0f, 0.0f, 0.0f,
        1.0f, 0.0f, 0.0f,
        1.0f, 1.0f, 0.0f
};
private short indices[] = {0, 1, 2, 0, 2, 3,};
private float texture[] = {
        0.0f, 1.0f,
        1.0f, 1.0f,
        0.0f, 0.0f,
        1.0f, 0.0f
};
private FloatBuffer vertexBuffer;
private FloatBuffer textureBuffer;
private ShortBuffer indexBuffer;
private int[] textures = new int[1];


public MTestSquare() {
    ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
       vbb.order(ByteOrder.nativeOrder());
       vertexBuffer = vbb.asFloatBuffer();
       vertexBuffer.put(vertices);
       vertexBuffer.position(0);
    ByteBuffer ibb = ByteBuffer.allocateDirect(indices.length*2);
       ibb.order(ByteOrder.nativeOrder());
       indexBuffer = ibb.asShortBuffer();
       indexBuffer.put(indices);
       indexBuffer.position(0);
     ByteBuffer tbb = ByteBuffer.allocateDirect(texture.length * 4);
         tbb.order(ByteOrder.nativeOrder());
         textureBuffer = tbb.asFloatBuffer();
         textureBuffer.put(texture);
         textureBuffer.position(0);

}

public void loadGLTexture(GL10 gl, Context context) {
    Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.testtexture);
    gl.glGenTextures(1, textures, 0);
    gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
    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);
    GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
    bitmap.recycle();
}
public void draw(GL10 gl) {
    gl.glFrontFace(GL10.GL_CCW);
    gl.glEnable(GL10.GL_CULL_FACE);
    gl.glCullFace(GL10.GL_BACK);
    gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);
    gl.glDrawElements(GL10.GL_TRIANGLES, indices.length, 
                      GL10.GL_UNSIGNED_SHORT, indexBuffer);
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
    gl.glDisable(GL10.GL_CULL_FACE);
}
}

我用

绘制正方形

square.draw(gl)

我把这行代码放在onSurfaceCreated

square.loadGLTexture(gl, this.context);

加载纹理

Answer 1

你实际上启用了纹理吗?

gl.glEnable(GL10.GL_TEXTURE_2D);

Answer 2

也许你可以复习一下这个内容。OpenGL纹理教程

int InitGL(GLvoid)                              // All Setup For OpenGL Goes Here
{
    if (!LoadGLTextures())                          // Jump To Texture Loading Routine ( NEW )
    {
        return FALSE;                           // If Texture Didn't Load Return FALSE ( NEW )
    }
    glEnable(GL_TEXTURE_2D);                        // Enable Texture Mapping ( NEW )
    glShadeModel(GL_SMOOTH);                        // Enable Smooth Shading
    glClearColor(0.0f, 0.0f, 0.0f, 0.5f);                   // Black Background
    glClearDepth(1.0f);                         // Depth Buffer Setup
    glEnable(GL_DEPTH_TEST);                        // Enables Depth Testing
    glDepthFunc(GL_LEQUAL);                         // The Type Of Depth Testing To Do
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);          // Really Nice Perspective Calculations
    return TRUE;                                // Initialization Went OK
}