It should be allocateDirect instead of allocate. On 14 дек, 02:22, billconan <[email protected]> wrote: > hello guys, > > i'm trying to draw a very simple 2D triangle with opengl. but i have > exception "illegal parameters" > > the problematic line is > > gl.glVertexPointer(3, GL11.GL_FLOAT, 0, mVertexBuffer); > > i'm new to android, my experience with it so far is so frustrating. i > simply copied code from other examples. and it simply doesn't work. > > i'm pretty sure the mVertexBuffer is successfully initialized. because > i can see the size of the buffer is 48 right before the execution of > the problematic line with the debugger. and this size is correct. > > however it just doesn't work. > > i initialized the buffer this way: > > mVertexBuffer = ByteBuffer.allocate(12*4); > mVertexBuffer.order(ByteOrder.nativeOrder()); > mVertexBuffer.position(0); > mVertexBuffer.putFloat(-1); > mVertexBuffer.putFloat(-1); > mVertexBuffer.putFloat(-1); > mVertexBuffer.putFloat(1); > mVertexBuffer.putFloat(1); > mVertexBuffer.putFloat(1); > mVertexBuffer.position(0); > > the code was actually copied from a opensource example. > > can somebody help me?
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