LoL nice sig

Once again sorry to anyone who downloaded the demo and got the evil access violation. I think I''ve traced the bug now - I use the multitexture extension to put a cloud shadow effect on the ground. Everywhere in the code where I use the extension I was checking that it''s available.... except in one place

I think the access violation happens when I try to call functions that aren''t supported, that would explain why memory is being accessed at address 00000000!

I''ve fixed the *ahem* bug, and updated the file so anyone who wants to take the risk (again) please feel free to try it

Thanks



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Don''t ask me, I''m just the code monkey

Thanks AP, I'll consider myself warned

quote:Original post by d000hg
I'm doing something very similar (check my page, should be a demo there - could you return the favor )

I get about 20fps +/- 2fps pretty much everywhere, looking good, are you using a quadtree/octree/frustum culling?

quote: can I ask a couple things about your project...

How do you get the ground to shade so smoothly? I can blend textures but you seem to have another colour input gradually shifting the base colour.

I'm using OpenGL so I don't know if I can help, but briefly..

I use glColorMaterial to enable colors for each vertex and then an array the same size as the vertex array to store colours (based on height)

quote:How big is your map in terms of vertices?

The demo uses 500x500 but there's a constant in the source you can change to any size, always square though. I'm running it at 2000x2000 on my machine

quote: Are you using a skybox/sphere?

No, not yet, I'm using fog and it looks a bit weird when you put a skybox behind it, I'll probably just put in a BIG textured quad in the sky to match the cloud shadows

quote: How do you work out which bit of the cloud to use with which vertex - does it take into account the direction of the light or just look straight up?

There's nothing clever about it really, just a texture stretched over the terrain and then moved, nice effect for very little effort. Try replacing clouds.jpg with your own choice of texture and you'll see what I mean!

Good luck with your game, do you have a game design yet? Let me know how it goes



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[edited by - bluecat on September 4, 2002 6:20:39 AM]

Yup, just one texture (two if you count the cloud shadows), I'm not happy with it though, looks ok when you're low but when you get up a hill the tiling looks terrible

The terrain shadows are done using vertex colours too, just darken the colour for shadows. I suppose using this method, I don't even need OpenGL's lighting but haven't got round to it yet

I'm using a cross between a quadtree and an octree (a quoctree? maybe not ), it was an octree until I started using triangle strips, strips of terrain were going out the top of one cube (node) and into the bottom of another so I had to put the terrain in the octree in 2D to make the triangle strips continuous if you see what I mean. Using the octree for other objects though and for culling

Vertex arrays are AFAIK very similar to DX vertex buffers and yes they are precalculated, I put them in display lists too which gives me about 30% increase in performance on my system although I've read it shouldn't

Oh yeah, BTW

Duron 1200
512mb PC133
Geforce 2mx 32mb
Win2K Pro

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[edited by - bluecat on September 7, 2002 9:08:05 AM]

New version 1.9 ready to download now
Added sky texture
Tank models
Better terrain colouring
Transparent water
Lock camera on nearest player
About 5% increase in FPS (on my system)

Should work for cards without multitexturing support too


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[edited by - bluecat on September 9, 2002 9:57:18 AM]