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[Virtools] Dynamic Hardware Texture Blending
- Subject: [Virtools] Dynamic Hardware Texture Blending
- From: "Arnaud Muthelet" <arnaud@simteam.com>
- Date: Mon, 27 May 2002 17:03:47 +0200
- Importance: Normal
Title: Message
Hi everybody,
I need to dynamically blend 2 textures, using my
GeForce 4 hardware support for that operation (I mean by that : I don't want to
use "software" multi-pass rendering).
What I tried : I use material effect/combine 2
textures, and add a channel to the mesh to specify texture coordinates. The
blending works ok BUT : to modify the blending factor, I found 2
solutions :
- Combine mode "Blend Using Diffuse
Alpha" and then modify the alpha of the mat : the blending works ok but...to
obtain a blending factor = 0, I need to have my material fully transparent !!
and that's obviously not what I want..
- other
solution : combine mode "Blend Using Texture Alpha". : then the variation of the
alpha of the texture correctly affects blending, and doesn"t affect the
transparency of my mat, which is GOOOOD BUT .. it is painfull and expensive
to dynamically modify the alpha of a texture cause it is a bitmap
!
My question : does anybody knows how to blend 2
textures (not using software multi-pass) with a quick, easy and dynamic
control on the blending factor ?
Thx very much,
Arnaud.
____________________________________________
Arnaud
MUTHELET
SIM
TEAM
arnaud@simteam.com
http://www.simteam.com
11 Boulevard
Brune - 75014 PARIS - FRANCE
tel: 33.(0)1.45.45.15.55
fax:
33.(0)1.45.45.16.17
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