CSG

Dynad · 02-27-2010 06:29 PM

Hey,

Is it possible to use custom meshes with CSG?

e.g:
Game::ObjParams &wall = *Game::Objs("obj/static/wall/0.obj");

In the header file u can only use standard shapes and Mshr. So who can help me out? smile

Thnx,
~Dynad

**Esenthel** · 02-27-2010 10:44 PM

CSG?

there is a function Csg which accepts MeshBase

Dynad · 02-28-2010 04:20 PM

Ok thnx, the only problem left is that the meshBase only accepts meshes so without textures etc. Do i have to make a struct mesh and use that in the meshBase?

**Esenthel** · 02-28-2010 04:34 PM

you can create 1 MeshBase from all mesh parts in a single mesh,
encode the part number(index) in each MeshBase triangle/quad "id" member
perform CSG
then recreate mesh parts according to "id" member

Dynad · 03-02-2010 02:24 AM

Thnx Esenthel, Ok well i tried that but i cant figure it out.

This works as meshBase:

PHP Code:

Meshs("obj/item/misc/barrel/0.mesh")->base(0); 

and this doesnt:

PHP Code:

Game::ObjParams &obj=*Game::Objs("obj/item/misc/barrel/0.obj");
Game::World.objCreate(obj,Matrix(obj.scale(),Vec(16,8,16))); 

mb.create(Ball(1),VTX_NRM);      
wall1.add(obj.mesh()->base(0));
Csg(test,mb,SEL_SUB,&csg);
obj.mesh()->base(0) = csg;
wall1.del(); 

Can someone give a small example how it works properly?

Thnx,
~Dynad

Dynad · 03-02-2010 06:22 PM

ok ill clear some code up:

PHP Code:

MeshBase mb, csg, wall1;

Game::ObjParams &obj=*Game::Objs("obj/item/misc/barrel/0.obj");
Game::World.objCreate(obj,Matrix(obj.scale(),Vec(16,8,16))); 

mb.create(Ball(1),VTX_NRM);      
wall1.add(obj.mesh()->base(0));
Csg(obj.mesh()->base(0),mb,SEL_SUB,&csg);
obj.mesh()->base(0) = csg;
wall1.del(); 

**Esenthel** · 03-02-2010 07:02 PM

I'll try to make a function which does that all

Dynad · 03-02-2010 07:03 PM

that would be awsome thnx smile

Dynad · 03-03-2010 06:13 PM

Ive downloaded the March update, and i saw u can use MeshLod with csg now thnx for that smile

I tried it with 2 meshes(MeshLods) but when i use csg both meshes just disappear.

And this does not compile why?

PHP Code:

MeshLod *lod;
cskel.setMatrix();
lod = mesh->getDrawLod(cskel.matrix()); 

PHP Code:

error C2440: '=' : cannot convert from 'EE::MeshLod' to 'EE::MeshLod *' 

or this when "MeshLod lod"

PHP Code:

error C2783: 'void EE::MeshLod::operator =(EE::MeshLod &)' : could not deduce template argument for 'TYPE' 

**Esenthel** · 03-03-2010 08:52 PM

maybe you should call setRender after csg,
I suggest using reference

MeshLod &lod=mesh->getDrawLod..
for pointer its
MeshLod *lod=&mesh->getDrawLod..

Dynad · 03-04-2010 11:26 AM

Ok the pointer is working. But setRender will do nothing aswell. I have really no idea whats wrong....

PHP Code:

player.cskel.setMatrix(); 
lod = &player.mesh->getDrawLod(player.cskel.matrix());
player2.cskel.setMatrix(); 
lod2 = &player2.mesh->getDrawLod(player2.cskel.matrix());

Csg(*lod,*lod2,SEL_SUB,NULL); 

PHP Code:

lod->setRender();
lod2->setRender(); 

OR

PHP Code:

player.mesh->setRender();
player2.mesh->setRender(); 

PHP Code:

player.mesh->draw(player.cskel); 

OR

PHP Code:

REPA(*lod)lod->part(i).draw(player.cskel); 

Ive tried any option i can think of but still not working :(

**Esenthel** · 03-04-2010 02:42 PM

do the meshes have 1 lod?
does the lods actually intersect?

Dynad · 03-04-2010 05:51 PM

Well i am using the tattoo example, so i guess the player has a lod otherwise the tattoo wont work either.

The players don't need to intersect with each other to be rendered.
Its kinda weird after the csg function the meshes just disappear...

**Esenthel** · 03-04-2010 06:34 PM

Csg function operates only on 1 lod,

perhaps the meshes are the same?
so A-A = 0 ?

Csg doesn't accept any additional matrix transformations
you must transform meshes before calling Csg

Dynad · 03-04-2010 06:55 PM

Meshes are the same yes, but its like Player* pl,pl2; so then it doesn't matter if its the same mesh right?

And yes ive tried transformation before csg but that didn't help either.

CSG
Author	Message