Sign in to follow this  

Clip plane problem

This topic is 2123 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi!
I'm currently working on creating a reflection map for the water, and I'm using a clip plane so that I can only draw into the texture the geometry above the water.
Here's is my code:
[CODE]
D3DXPLANE refractionClipPlane;
D3DXVECTOR3 point(0.0f, 6.0f, 0.0f);
D3DXVECTOR3 normal(0.0f, 1.0f, 0.0f);
D3DXPlaneFromPointNormal(&refractionClipPlane,&point,&normal);
D3DXMATRIX inver;
D3DXMatrixInverse(&inver,0,&(mView*mProj));
D3DXMATRIX trans;
D3DXMatrixTranspose(&trans,&inver);
D3DXPLANE outRefraction;
D3DXPlaneTransform(&outRefraction,&refractionClipPlane,&trans);
refractionMap->beginScene(); //refraction map is a renderTarget
gd3dDevice->Clear(0, 0, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, 0xff000000, 1.0f, 0);
gd3dDevice->SetClipPlane(0, outRefraction);
gd3dDevice->SetRenderState(D3DRS_CLIPPLANEENABLE, D3DCLIPPLANE0);
drawReflectedByWater(); //draw geometry
gd3dDevice->SetRenderState(D3DRS_CLIPPLANEENABLE,0);
refractionMap->endScene(); //render target ends
[/CODE]

I have this problem, if I only move the camera's position DirectX draws the scene perfectly:
[img][URL=http://imageshack.us/photo/my-images/842/clipplaneproblem1.jpg/][IMG]http://img842.imageshack.us/img842/1033/clipplaneproblem1.jpg[/img][/URL] Uploaded with [url="http://imageshack.us"]ImageShack.us[/url][/img]

But if I change the camera look vector, for instance, if I aim the camera to the sky the clip plane moves along with te camera too:
[img][URL=http://imageshack.us/photo/my-images/696/clipplaneproblem2.jpg/][IMG]http://img696.imageshack.us/img696/6255/clipplaneproblem2.jpg[/img][/URL] Uploaded with [url="http://imageshack.us"]ImageShack.us[/url][/img]

As you can see from my code, I've taken into account that if you are not using the fixed pipeline the plane has to be in clipspace coordinates.
Anyone knows what can I do in order to avoid this problem (plane moving along with the camera)?

Share this post


Link to post
Share on other sites

This topic is 2123 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this