As I understand it glBindTexture() sets the active texture by it's Id and glTexImage2D() fills whatever the active texture is with the contents of the buffer
so recalling that ought to change the texture On Jul 2, 6:52 am, Bruce Rees <[email protected]> wrote: > Hi All, > > I have a texture-mapped cube based in part on the Kube API demo and > the Textured Cube example from anddev.org, It is working fine using > bitmaps loaded from R.drawable.. what I need to do now is to make the > texture for each face dynamic (using Bitmaps created in code). I'm > having trouble understanding how to change the textures on the fly and > I'm hoping someone can point me in the right direction.. > > This is the code that initially sets a texture: > > gl.glBindTexture(GL10.GL_TEXTURE_2D, texBuf.get(num)); > Bitmap bmp = > BitmapFactory.decodeResource(context.getResources(), > id); > int pixels[] = new int[TEX_SIZE * TEX_SIZE]; > bmp.getPixels(pixels, 0, TEX_SIZE, 0, 0, TEX_SIZE, TEX_SIZE); > int pix1[] = new int[TEX_SIZE * TEX_SIZE]; > for (int i = 0; i < TEX_SIZE; i++) > { > for (int j = 0; j < TEX_SIZE; j++) > { > //correction of R and B > int pix = pixels[i * TEX_SIZE + j]; > int pb = (pix >> 16) & 0xff; > int pr = (pix << 16) & 0x00ff0000; > int px1 = (pix & 0xff00ff00) | pr | pb; > //correction of rows > pix1[(TEX_SIZE - i - 1) * TEX_SIZE + j] = px1; > } > } > > IntBuffer tbuf = IntBuffer.wrap(pix1); > tbuf.position(0); > gl.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGBA, TEX_SIZE, > TEX_SIZE, 0, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, tbuf); > gl.glTexParameterx(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MIN_FILTER, > GL10.GL_LINEAR); > gl.glTexParameterx(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MAG_FILTER, > GL10.GL_LINEAR); > > What would I need to change in this code to allow an existing texture > to be replaced (eg. a new Bitmap would be passed in instead of loading > the resource, but when I try this the texture remains unchanged). > > Thanks! --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
