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Direct 3D 9 Problems.

Started by InfraRed Apr 29, 2003 at 1:08 PM 2 replies 550+ views

Original Post

Apr 29, 2003 at 1:08 PM

hi! i'm learning Direct3D 9. i wrote an application (code attached), and those are the problems. 1. lights, as you can see in the attachment, there is a problem with the light. i'm using D3DLIGHT_DIRECTIONAL type, and it is not enough to light all the terrain, so i added another light (light one toggled by '1' key and light 2 by '2' key). 2. culling problem. when i rotating the camera around the terrain, (using Right and Left Keys, Up and Down key form zooming) the mountains sometimes look cut. i'm using IndexBuffer for rendering the terrain. (as wrote in the Andy Pike's Terrain tutorial) ScreenShot:

Download Source code Thanks, InfraRed. [edited by - InfraRed on April 29, 2003 2:13:18 PM]

thedo

Apr 30, 2003 at 1:35 AM

Your not clearing your z-buffer

add this to your initialization


d3dpp.AutoDepthStencilFormat=D3DFMT_D24S8;
d3dpp.EnableAutoDepthStencil = TRUE;

and this to your refresh


g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(90,90,0), 1.0f, 0 );

Neil

WHATCHA GONNA DO WHEN THE LARGEST ARMS IN THE WORLD RUN WILD ON YOU?!?!

InfraRed

Apr 30, 2003 at 5:27 AM

Thank you Neil!
It looks great now!

do you have any idea why the lights not light all the terrain?

is it because of the Normal positioning?

Thanks

InfraRed

Apr 30, 2003 at 5:55 AM

Take a look on the screenshot in the top of this thread.

for some reason the D3DLIGHT_DIRECTIONAL doesn''t work properly.
as you can see it''s all dark in the right side.

why?
i tried to use 2 directional lights in opposite directions to cover more terrain, but only a little more light added.

why?
is this beacuse of the Normal computing?

InfraRed.

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