Hi !
Featured games (84)
games approved by the League of Dukes
Games in Showcase (604)
Games in Android Showcase (171)
games submitted by our members
Games in WIP (654)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  [solved] glNormalPointer causing crash while attempting to add lighting  (Read 2456 times)
0 Members and 1 Guest are viewing this topic.
Offline repairmanjack3

Junior Newbie

« Posted 2013-06-09 22:31:38 »

I'm currently working on a project using the lwjgl. I have a working world that has textures and vertexes in Vertex buffer objects. The next step I'm trying to implement is lighting. I have the normals for my world defined and have set up a VBO for them. However, it causes the program to crash.

This is the code I use to set up the normal VBO, it is the same setup I use for the texture and vertex VBO's that I know work.

float[] norms = new float[normalsList.size()];
for (int i = 0; i < normalsList.size(); i++)
    norms[i] = normalsList.get(i);

GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, nHandle);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, 4 * norms.length, GL15.GL_DYNAMIC_DRAW);
ByteBuffer byteBuffer3 = GL15.glMapBuffer(GL15.GL_ARRAY_BUFFER, GL15.GL_WRITE_ONLY, 4 * norms.length, null);
nBuffer = byteBuffer3.order(ByteOrder.nativeOrder()).asFloatBuffer();

This is the code I use to draw my VBO objects, changing the values for glNormalPointer has changed where the program crashes, but it always does crash. The crash does not happen if I disable lighting.

GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, tHandle);
GL11.glTexCoordPointer(2, GL11.GL_FLOAT, 0, 0);

GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, nHandle);
GL11.glNormalPointer(GL11.GL_FLOAT, 0, 0);

GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vHandle);
GL11.glVertexPointer(3, GL11.GL_FLOAT, 0, 0);

GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, model.cubeVerts.length / (3));

I know that I need to disable GL_LIGHTING for 2d drawing, I just don't have that for my test world right now.

Is there some function call I am missing or variable I need to supply?
Any help is appreciated!
Offline HeroesGraveDev

JGO Kernel

Medals: 360
Projects: 11
Exp: 3 years

┬─┬ノ(ಠ_ಠノ)(╯°□°)╯︵ ┻━┻

« Reply #1 - Posted 2013-06-10 05:50:04 »

What does it give you when it crashes?

Offline davedes
« Reply #2 - Posted 2013-06-10 21:19:03 »

Are you using glEnableClientState to enable the normal vertex array? (As well as the others)

Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline repairmanjack3

Junior Newbie

« Reply #3 - Posted 2013-06-11 19:23:47 »

I was able to fix the problem. I was getting a crash dump, not a stack trace, but I realized while I was trying to get my world lighting to work, I also had my non-world vbo enabled. When it called glNormalPointer and had no normal data that second vbo caused everything to crash. When I disabled that the world lighting worked, and then when normals were added to the second vbo everything's lighting worked.
Pages: [1]
  ignore  |  Print  
You cannot reply to this message, because it is very, very old.

bilznatch (27 views)
2015-08-04 11:03:17

SHC (44 views)
2015-08-01 03:58:20

Jesse (25 views)
2015-07-29 04:35:27

Riven (48 views)
2015-07-27 16:38:00

Riven (26 views)
2015-07-27 15:35:20

Riven (28 views)
2015-07-27 12:26:13

Riven (19 views)
2015-07-27 12:23:39

BurntPizza (42 views)
2015-07-25 00:14:37

BurntPizza (56 views)
2015-07-24 22:06:39

BurntPizza (35 views)
2015-07-24 06:06:53
List of Learning Resources
by gouessej
2015-07-09 11:29:36

How Do I Expand My Game?
by bashfrog
2015-06-14 11:34:43

List of Learning Resources
by PocketCrafter7
2015-05-31 05:37:30

Intersection Methods
by Roquen
2015-05-29 08:19:33

List of Learning Resources
by SilverTiger
2015-05-05 10:20:32

How to: JGO Wiki
by Mac70
2015-02-17 20:56:16

2D Dynamic Lighting
by ThePixelPony
2015-01-01 20:25:42

How do I start Java Game Development?
by gouessej
2014-12-27 19:41:21 is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!