android texture2D导致3d色彩丢失

如何解决android texture2D导致3d色彩丢失

| 我试图绘制一个3d对象，然后在屏幕上绘制一个2d纹理。使用onSurfaceCreated（GL10 gl）的此函数创建纹理：

public static int loadText(GL10 gl,float width,float height,String text) {
        gl.glGenTextures(1,mTextureNameWorkspace,0);
        textureName = mTextureNameWorkspace[0];
        gl.glBindTexture(GL10.GL_TEXTURE_2D,textureName);
        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_CLAMP_TO_EDGE);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D,GL10.GL_TEXTURE_WRAP_T,GL10.GL_CLAMP_TO_EDGE);
        gl.glTexEnvf(GL10.GL_TEXTURE_ENV,GL10.GL_TEXTURE_ENV_MODE,GL10.GL_REPLACE);
        bitmap = Bitmap.createBitmap((int) width,(int) height,Bitmap.Config.ARGB_4444);
        canvas = new Canvas(bitmap);
        canvas.drawText(text,width / 2,50,paint);
        glutils.texImage2D(GL10.GL_TEXTURE_2D,bitmap,0);
        mCropWorkspace[0] = 0;
        mCropWorkspace[1] = bitmap.getHeight();
        mCropWorkspace[2] = bitmap.getWidth();
        mCropWorkspace[3] = -bitmap.getHeight();
        bitmap.recycle();
        ((GL11) gl).glTexParameteriv(GL10.GL_TEXTURE_2D,GL11Ext.GL_TEXTURE_CROP_RECT_OES,mCropWorkspace,0);
        return textureName;
    }

问题是如果我在不调用此框架的情况下绘制框架，则3d对象为橙色，但显然2d纹理未绘制。但是，如果我在调用此框后绘制了框架，则3d对象将变为黑色。 im用于绘图的代码：

        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
        gl.gldisable(GL10.GL_BLEND);
        gl.glShadeModel(GL10.GL_SMOOTH);
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glEnable(GL10.GL_DEPTH_TEST);
        gl.glLoadIdentity();
        glu.gluPerspective(gl,45.0f,(float) width / (float) height,0.1f,500.0f);
        gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();
        gl.glTranslatef(4,2,-10);
        gl.glrotatef(45,1,0);
        car.draw(gl);

    

解决方法

您没有在任何地方启用纹理单元。进行任何其他与纹理相关的调用之前，请先放置

glEnable(GL_TEXTURE_2D)

。