Change Texture on Model more than once about rajawali HOT 15 CLOSED

Hmmm.

It seems that this is not the right function to change the texture on a model. Now I'm setting the material instead of adding a texture, and it works.

Danny

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Sorry to bring this up again, but is this really the right method to change the texture on a model? What is the normal workflow for that?
I change the material in the onDrawFrame method to change it rapiditly but it only changes once.

Danny

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This is the right way to do this:

mTextureManager.updateTexture(texInfo.getTextureId(), myNewBitmap);

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I had the same question as DD above. I apologize for having a discussion in a bug log--I'm new to GitHub (and Rajawali and OpenGL). If there's a better place to talk about this, please direct me there.

I am able to overlay a world image on a sphere using addTexture, with a fine result:
http://i1254.photobucket.com/albums/hh618/CatCarson84/sphere-imagery.png
Or I can overlay a different image instead, in the same way, with a fine result:
http://i1254.photobucket.com/albums/hh618/CatCarson84/sphere-gray.png

But if I add the first image, then call updateTexture with the second image, I get a weird mishmash of the two:
http://i1254.photobucket.com/albums/hh618/CatCarson84/sphere-hybrid.png

My renderer code (snippet from initScene()) is:

    mLight = new DirectionalLight(1f, 0.2f, 1.0f); // set the direction
    mLight.setColor(1.0f, 1.0f, 1.0f);
    mLight.setPower(1.0f);

// createBasemapSpheres();
mBasemapSphere = new Sphere(1.0f, 40, 40);
mBasemapSphere.setTransparent(false);

    DiffuseMaterial dm = new DiffuseMaterial();
    mBasemapSphere.setMaterial(dm);
    mBasemapSphere.addLight(mLight);
    Bitmap bg = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.world_imagery_2048);
    TextureInfo mBasemapTextureInfo = mTextureManager.addTexture(bg);
    mBasemapSphere.addTexture(mBasemapTextureInfo);
    addChild(mBasemapSphere);

    Bitmap bg2 = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.canvas_gray_2048);
    mTextureManager.updateTexture(mBasemapTextureInfo.getTextureId(), bg2);

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Thanks Dennis for your response.

Ive added

mTextureManager.updateTexture(texInfo[i].getTextureId(), tex[i]);

to my onDrawFrame fkt. and now it cycles through the images mapped on the cube.

@markdeaton
Try using a material and map the material to your object.

Danny

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Sorry again if this is the wrong place for a follow-up; it doesn't seem right to open a new issue for it. I attempted to set up multiple materials, each with its own texture; but there's something strange going on in the addTexture() routines that causes the textures to trample on one another and ultimately crash the app after about 7 material changes.

But I revisited my original approach (above), and found that everything works, providing I pass in the mipmap=false flag when I call mTextureManager.addTexture() on the one material I'm now using.

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mTextureManager.updateTexture(Models[0].model.getTextureInfoList().get(0).getTextureId(), mTextureBrown);

I tried this but not working.

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I've just committed a fix for this. Updating texture didn't work for mipmapped textures. I've deprecated the old method. The new method has a slightly different signature:

public void updateTexture(TextureInfo textureInfo, Bitmap texture) { ...

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Thanks, Dennis!

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its now working, but the textureCoords not the some..the texture just slipping on the object...why?

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public void updateTexture(TextureInfo textureInfo, Bitmap texture) {
    int bitmapFormat = texture.getConfig() == Config.ARGB_8888 ? GLES20.GL_RGBA : GLES20.GL_RGB;
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureInfo.getTextureId());

    if (textureInfo.isMipmap())
        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR_MIPMAP_LINEAR);
    else
        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);

    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
    GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT);
    GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT);
    GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmapFormat, texture, 0);

    if (textureInfo.isMipmap()) GLES20.glGenerateMipmap(GLES20.GL_TEXTURE_2D);
    textureInfo.setTexture(texture);

    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
}

here is the working code, BUT when I have 4-5 objects (clones), and when I am just change one's tetxure, then the all object's texture changes

i am using this code

mTextureManager.updateTexture(model.getTextureInfoList().get(0), mTextureGreen)

0 is the BASE texture
1 is the BUMP right?

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maybe need a function to update only the DIFFUSE or only the BUMP texture on the modell.
at the moment the textures are mixing away

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Well, it uses the texture id, so there's no need to distinguish between diffuse or bump.

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Yes, cloned objects share materials. If you don't want a cloned material then you'll have to manually create new materials. Using shaders & textures on mobile devices is a costly operation. That's why materials aren't cloned automatically.

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I've run in the same problem.

@MasDennis

This is the right way to do this:
mTextureManager.updateTexture(texInfo.getTextureId(), myNewBitmap);

What whould be the way to update a Etc1 texture?
There is addEtc1Texture methods but no suitable updateTexture.

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