[SOLVED] LWJGL Visual Illusion Problem

[Vladiedoo]

Hi, so I obtained source code from http://www.youtube.com/watch?v=O0xtgfcxcq0&feature=plcp but noticed a strange visual effect.

I plugged in the code and when looking directly down onto a block this occurred.




I have jumped around with learning OpenGL but I've firmly started recently but I havn't been able to resolve the issue, yet.

Here is parts of the code that hopefully explains the problem

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static int width=800, height=600; // ---------------------------------------------------------------------------------       DisplayMode dm = new DisplayMode(width,height);       for(DisplayMode mode : Display.getAvailableDisplayModes()){          if(mode.getWidth() == 800 && mode.getHeight() == 600 && mode.isFullscreenCapable() && mode.getBitsPerPixel() == 32){             dm = mode;             break;          }       }       if(dm.isFullscreenCapable()) Display.setFullscreen(false);       Display.setDisplayMode(dm);       Display.create(); // ------------------------------------------------------------------------------------    private void initGL3() {       GL11.glMatrixMode(GL11.GL_PROJECTION);       GL11.glLoadIdentity();       GLU.gluPerspective((float) 100, App.width / App.height, 0.001f, 1000);       GL11.glMatrixMode(GL11.GL_MODELVIEW);       GL11.glEnable(GL11.GL_TEXTURE_2D);       GL11.glShadeModel(GL11.GL_SMOOTH);       GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);       GL11.glClearDepth(1.0f);       GL11.glEnable(GL11.GL_DEPTH_TEST);       GL11.glDepthFunc(GL11.GL_LEQUAL);    } //    This is one of the crates that are being drawn. //    float startX, float startY, float startZ, float endX, float endY, float endZ, Texture texSurround       collidable.add(new PolyVoxel(20, 0.1f, 2, 22, 2, 4, texCrate)); // Rotation values are created from mouse movement (FPS camera).    public void translateCamera() {       GL11.glRotatef(rotation.x, 1, 0, 0);       GL11.glRotatef(rotation.y, 0, 1, 0);       GL11.glRotatef(rotation.z, 0, 0, 1);       GL11.glTranslatef(-vector.x, -vector.y - 1.4f, -vector.z);    }

Sorry for the long post, if someone could point me in the right direction I would be grateful, thanks for your time.

[theagentd]

Your call to GLU.gluPerspective() most likely screws up the aspect ratio. App.width and App.height are both ints, right? That means that App.width / App.height = 1 in most cases since effectively the decimals are getting cut off. You should just change it to

1	(float)App.width / App.height

which should solve the problem.

[Orangy Tang]

That usually means you've got your aspect ratio (second parameter to gluPerspective) wrong.

Are App.width and App.height ints? Because you may be getting integer divide so your aspect is incorrectly 1 rather than 1.6 (or whatever).

Edit: Spooky double post!

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[theagentd]

18 seconds too slow, sucker! 

[Vladiedoo]

[size=10pt]Excellent![/size] Thank you so much, that solved the issue. (Credits go to the answer that is 18 seconds faster of course  )

[theagentd]

[size=10pt]Excellent![/size] Thank you so much, that solved the issue. (Credits go to the answer that is 18 seconds faster of course  )

Yatta!