NeHe07 & Lighting problem

[Xerif]

Hi,

Anybody are try the NeHe07 with the LWJGL V0.7 ?
When i turn on the lighting, anyone is displayed, the screen stay in black color! :-/

What's wrong ??

[rdcarvallo]

I got the same problem...

 My PC's specs are:
AthlonXP, GeForce2Ti, win98se, nVidia Drivers 40.*

[princec]

Is this with your own port of NeHe 7, or Ch*mans?

Cas

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[rdcarvallo]

With the demos in the LWJGL site..

[Mac_Systems]

Hi,  

what type of Light you use ?
Or is it to far away from any Object ?
For me the 0.7 Light ing works well.
Maybe some Colors are set to dark, empty buffers ?

I init some Scene like this:

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// create Colors          float[] global_ambient = new float[]                              {                              0.0f , 0.0f , 0.0f , 1.0f} ; // Set Ambient Lighting To Fairly Dark Light (No Color)          float[] light0pos = new float[]                         {                         0.0f , 5.0f , 10.0f , 1.0f} ; // Set The Light Position          float[] light0ambien = new float[]                            {                            0.0f , 0.0f , 0.0f , 1.0f} ; // More Ambient Light          float[] light0diffuse = new float[]                             {                             0.0f , 0.0f , 0.0f , 1.0f} ; // Set The Diffuse Light A Bit Brighter          float[] light0specular = new float[]                              {                              0.0f , 0.0f , 0.0f , 1.0f} ; // Fairly Bright Specular Lighting           // Create Buffer           // warp Color Buffers          global_ambientBuffer.put ( global_ambient ).flip () ;           global_light0posBuffer.put ( light0pos ).flip () ;           global_light0ambienBuffer.put ( light0ambien ).flip () ;           global_light0diffuseBuffer.put ( light0diffuse ).flip () ;           global_light0specularBuffer.put ( light0specular ).flip () ;           GL.glLightModel ( GL.GL_LIGHT_MODEL_AMBIENT , global_ambientBuffer ) ; // Set The Ambient Light Model           GL.glLightModel ( GL.GL_LIGHT_MODEL_AMBIENT , global_ambientBuffer ) ; // Set The Global Ambient Light Model          GL.glLightfv ( GL.GL_LIGHT0 , GL.GL_POSITION ,                      global_light0posBuffer ) ; // Set The Lights Position          GL.glLightfv ( GL.GL_LIGHT0 , GL.GL_AMBIENT ,                      global_light0ambienBuffer ) ; // Set The Ambient Light          GL.glLightfv ( GL.GL_LIGHT0 , GL.GL_DIFFUSE ,                      global_light0diffuseBuffer ) ; // Set The Diffuse Light          GL.glLightfv ( GL.GL_LIGHT0 , GL.GL_SPECULAR ,                      global_light0specularBuffer ) ; // Set Up Specular Lighting          GL.glEnable ( GL.GL_LIGHTING ) ; // Enable Lighting          GL.glEnable ( GL.GL_LIGHT0 ) ; // Enable Light0

Hope the snippet helps  

- Jens

[rdcarvallo]

Thanks  Jens,

 I found what was producing the error..
 The code in Nehe07 example from LWJGL's site says:

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... ByteBuffer temp = ByteBuffer.allocateDirect(16); temp.order(ByteOrder.nativeOrder()); // Setup The Ambient Light GL.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT,temp.asFloatBuffer().put(LightAmbient)); ...

 There aren't calls to the flip() method. So I fixed this with:

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... ByteBuffer temp = ByteBuffer.allocateDirect(16); temp.order(ByteOrder.nativeOrder()); // Setup The Ambient Light FloatBuffer fb = temp.asFloatBuffer().put(LightAmbient); fb.flip(); GL.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT, fb); ...

 And now works!!
 
 Now I need to learn NIO..

   Rafael