I created a new thread for this topic, with better examples and screen shots.
It is at http://groups.google.com/group/android-developers/browse_thread/thread/42efe5ae8acbc308 On Aug 4, 10:50 am, SChaser <crotalistig...@gmail.com> wrote: > On Aug 3, 10:06 pm, Robert Green <rbgrn....@gmail.com> wrote:> Have you tried > different values of gl.glLineWidthx()? 0x1 is 1 in > > hex, which, given in fixed converted to float = 0.00001 = super, > > super, super tiny. I'd start with 65536 (0xffff if you really like > > using hex to represent FP) and see how it does. > > Yeah, I have since my last post. If I use a very wide line (, it does > show up on the emulator, as a wide (not 1 px) line. On the phone, it > still shows up as a 1px wide line. Go figure. > > There is something else fishy on the emulator that hints at an issue > in the transformations - when I do make a huge line, it isn't in the > right place. Instead of having an X in the middle of the screen (among > other things), I have a vertical line that extends from somewhat below > the middle of the screen to the top of the screen. > > Code is now: > public void onDrawFrame(GL10 gl) { > float fOrthoScale = 1; > int lineWidth = 0x10000; > _hgt2width = (float) MyApp._width / MyApp._height; > gl.glClearColor(0,0,.2f, 1f); > gl.glDisable(GL10.GL_CULL_FACE); > gl.glShadeModel(GL10.GL_FLAT); > gl.glDisable(GL10.GL_DEPTH_TEST); > gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); > // gl.glViewport(0, 0, MyApp._width/2, MyApp._height/2); > gl.glMatrixMode(GL10.GL_PROJECTION); > gl.glLoadIdentity(); > GLU.gluOrtho2D(gl, -_hgt2width*fOrthoScale, > _hgt2width*fOrthoScale, -1*fOrthoScale, 1*fOrthoScale); > gl.glMatrixMode(GL10.GL_MODELVIEW); > gl.glLoadIdentity(); > // gl.glEnable(GL10.GL_BLEND); > gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); > gl.glEnable(GL10.GL_LINE_SMOOTH); > gl.glDisableClientState(GL10.GL_COLOR_ARRAY); > > gl.glScalef(1, _hgt2width, 1); > // gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST); > gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); > > float lscale = .002f*MyApp._curScale; > > gl.glPushMatrix(); > gl.glColor4f(1f, 1f, 0f, 1f); > gl.glTranslatef(.375f, .5f, 0f); > gl.glRotatef(30, 0, 0, 1); > gl.glScalef( lscale, lscale, 1f); > gl.glVertexPointer(2, GL10.GL_FIXED, 0, _lineVertices); > gl.glLineWidthx(lineWidth); > drawArrays(gl); > gl.glPopMatrix(); > > gl.glPushMatrix(); > gl.glColor4f(1f, 1f, 1f, 1.0f); > gl.glScalef( lscale*8, lscale*8, 1f); > gl.glVertexPointer(2, GL10.GL_FIXED, 0, _lineVertices); > gl.glLineWidthx(lineWidth); > drawArrays(gl); > gl.glPopMatrix(); > > } > void drawArrays(GL10 gl) { > gl.glDrawArrays(GL10.GL_LINE_STRIP, 0, 5); //small square > gl.glDrawArrays(GL10.GL_LINE_STRIP, 5, 5); //medium square > gl.glDrawArrays(GL10.GL_LINE_STRIP, 10, 5);//large square > gl.glDrawArrays(GL10.GL_LINE_STRIP, 15, 2);//x axis > gl.glDrawArrays(GL10.GL_LINE_STRIP, 17, 2);//y axis > gl.glDrawArrays(GL10.GL_LINE_STRIP, 19, 2);//X half > gl.glDrawArrays(GL10.GL_LINE_STRIP, 21, 2);//X half > } > > void makeLines() { > int hlf = 0x08000; > int one = 0x10000; > int sml = one/8; > int med = one*8; > int big = 0x10000000; > Log.d("===jrm", String.format("one:%x big:%x", one, big)); > int vertices[] = { > -sml , sml, //0 start square - scale 1/10 > sml , sml, //1 > sml , -sml, //2 > -sml , -sml, //3 > -sml , sml, //4 > > -one , one, //5 start square - scale 1 > one , one, //6 > one , -one, //7 > -one , -one, //8 > -one , one, //9 > > -med , med, //10 start square - scale 10 > med , med, //11 > med , -med, //12 > -med , -med, //13 > -med , med, //14 > > -big , 0, //15 start coord axes over huge area > big , 0, //16 > > 0 , big, //17 > 0 , -big, //18 > > -big , -big, //19 start X over huge dimensions > big , big, //20 > > -big , big, //21 > big , -big, //22 > med , one // BUT? Without this line, blows up > if openGL debug is enabled > > }; > this.numLines = vertices.length/2; > > ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4); > vbb.order(ByteOrder.nativeOrder()); > _lineVertices = vbb.asIntBuffer(); > _lineVertices.put(vertices); > _lineVertices.position(0); > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
