Transparency problems on fxRenderObject
by Vijay Myneni · in Torque Game Engine · 01/25/2005 (12:59 am) · 4 replies
Hello,
I was hoping someone could help me out here. I am using Melv's fxRenderObject resource to render really simple flat quads with a texture on them. Each object is just a plane, and they are always horizontal and flat (normal pointing straight up in positive Z).
So I need to set them up to render with transparency and work properly when some of them are overlapping others. I know I have to do at least this in prepRenderImage:
image->isTranslucent = true;
image->sortType = SceneRenderImage::Point; // or ::Plane
What else do I need to do to get this to work? I've tried various combos of Point and Plane, and also thrown in what I thought were the correct data for other image variables, like poly and plane. But it always looks okay from some angles, and not from others. I guess it's because they're not sorting right. You always view these things from above, so it would probably be enough to just sort them based on their z-position value, but I can't seem to figure out how to make that happen.
This is not my area of expertise unfortunately. I will keep researching, but I was hoping someone could point me in the right direction.
Thanks,
Vijay
I was hoping someone could help me out here. I am using Melv's fxRenderObject resource to render really simple flat quads with a texture on them. Each object is just a plane, and they are always horizontal and flat (normal pointing straight up in positive Z).
So I need to set them up to render with transparency and work properly when some of them are overlapping others. I know I have to do at least this in prepRenderImage:
image->isTranslucent = true;
image->sortType = SceneRenderImage::Point; // or ::Plane
What else do I need to do to get this to work? I've tried various combos of Point and Plane, and also thrown in what I thought were the correct data for other image variables, like poly and plane. But it always looks okay from some angles, and not from others. I guess it's because they're not sorting right. You always view these things from above, so it would probably be enough to just sort them based on their z-position value, but I can't seem to figure out how to make that happen.
This is not my area of expertise unfortunately. I will keep researching, but I was hoping someone could point me in the right direction.
Thanks,
Vijay
About the author
#2
03/01/2005 (1:48 am)
I'm having some problems with transparency and that object too. Could you please post that code? :)
#3
I actually ended up doing something different that using the code in waterBlock.cc. My situation was a simple case, in that I was only displaying perfectly horizontal textures slightly above the ground plane. So I ended up offsetting each one by a random fractional amount in the z direction, and then using this offset to sort them:
03/02/2005 (1:16 pm)
Hi Luis,I actually ended up doing something different that using the code in waterBlock.cc. My situation was a simple case, in that I was only displaying perfectly horizontal textures slightly above the ground plane. So I ended up offsetting each one by a random fractional amount in the z direction, and then using this offset to sort them:
image->obj = this; image->isTranslucent = true; image->sortType = SceneRenderImage::Point; image->poly[0] = Point3F(0, 0, mHeightOffset);
#4
03/03/2005 (1:11 am)
Ok, my problem different, and finally solved disabling writing to the depth buffer. Here's the whole discussion: www.garagegames.com/mg/forums/result.thread.php?qt=26536 just in case :) 
Torque Owner Vijay Myneni