I have no answer to your question. Just want to add that there are
other differences between emulator and real device - emulator works OK
with non power of two texture dimensions and supports drawing lines
with width more than 1.
On May 30, 12:13 am, Nilz <nilz.v.pa...@gmail.com> wrote:
> I have worked this out!
>
> So for anyone who's interested:
>
> When I removed gl.glEnableClientState(GL10.GL_COLOR_ARRAY); from the
> code, it started working on the device, as well as continuing to work
> on the emulator. When I put it back in we only get coloured shapes in
> the emulator, and not on the device.
>
> Does anyone know why there is this inconsistency? Is it a bug in the
> sdk? Or a lack of understanding on my part?
>
> Cheers,
> Nilz.
>
> On 26 May, 22:45, Nilz <nilz.v.pa...@gmail.com> wrote:
>
>
>
> > Hi There!
>
> > After spending the better half of this day getting my HTC Magic to
> > work in developer mode, I've now found that some of my frist openGL
> > coding attempts that appeared to work fine in the emulator doesn't
> > work as expected on the device. I've narrowed this down to glColorf(r,
> > g, b, a) not working as expected on the device itself. The provided
> > OpenGL samples do work though.
>
> > So for example, after modifying Cube.java from the samples to the
> > below code I find that I get the expected grey square on the emulator
> > but a blank white screen (background fill colour) on the device.
>
> > class Cube
> > {
> > public Cube()
> > {
> > int one = 0x10000;
> > int vertices[] = {
> > -one, -one,
> > -one, one,
> > one, -one,
> > one, one,
> > };
>
> > // Buffers to be passed to gl*Pointer() functions
> > // must be direct, i.e., they must be placed on the
> > // native heap where the garbage collector cannot
> > // move them.
> > //
> > // Buffers with multi-byte datatypes (e.g., short, int, float)
> > // must have their byte order set to native order
>
> > ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
> > vbb.order(ByteOrder.nativeOrder());
> > mVertexBuffer = vbb.asIntBuffer();
> > mVertexBuffer.put(vertices);
> > mVertexBuffer.position(0);
> > }
>
> > public void draw(GL10 gl)
> > {
> > gl.glFrontFace(GL10.GL_CW);
> > gl.glVertexPointer(2, gl.GL_FIXED, 0, mVertexBuffer);
> > gl.glColor4f(0.5f, 0.5f, 0.5f, 0.5f);
> > gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
> > }
>
> > private IntBuffer mVertexBuffer;
>
> > }
>
> > I'm using the latest 1.5 SDK, and my device is the HTC Magic running
> > firmware version 1.5.
>
> > Can anyone explain to me why when switching from colour buffers and
> > using glDrawElements to glColorf and glDrawArrays, stops shapes from
> > being coloured in?
>
> > Cheers,Nilz.
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