SetVertex -> Cannot set color?

[regress]

Passing the color argument when using SetVertex on a mesh appears to do nothing. No matter what color I pass, all vertexes remain white.

Cheers,
Ben

[JohnnyC]

Was fixed today

[regress]

Right on.  Here's a associated question: Would it be a possible to also add an optional argument to the SetColor call, or alternately, a SetVertexColor call, which allows one to set color by vertex (pass vertex ID) as well? If it's no big deal to add it, it would help me out tremendously, e.g. I'd be able to change the color of a vertex at any time.

Cheers,
Ben

[JohnnyC]

No idea - i just park the cars and sell popcorn...... ask 'The Code God'

[Dreddnafious]

ummm Johhny, i said extra butter and no salt, not extra salt and no butter.
and 40 quid was missing from my car's console. Im afraid im going to have to speak to your boss about this...  

[JohnnyC]

Yeah but I got a tight butt and look cool in these skates so f... mat your hard disk buddy

[Dreddnafious]

bragger  :lol:

[SylvainTV]

Regress, now the TVMesh doesn't support any more  a color/vertex, it caused too much overhead in the code to support and wasn't flexible really. So that's why you can use only SetColor/SetMaterial to set the color on meshs.

Hmm maybe there is a workaround though, what were you trying to do?

[regress]

I'm working on my TreeFactory code again; I can still change color, given a fairly generic bark texture, of a given tree (each tree is one mesh group) using SetMaterial, but setting color on individual vertexes would be helpful for:

- easily "darkening" the tops and bottoms of trunks and branchs
- changing color/alpha to different levels of transparency at vertexes which hinder the camera perspective (can do it with the whole tree itself I believe with SetMaterial, but haven't tried that yet)
- since individual mesh groups in one mesh cannot take advantage of the shadow functionality you've built into the TVMesh object, having per-vertex color operations would also help with creating gradient home-grown shadows for the trees

Cheers,
Ben

[shellshock]

Sylvain,

now the TVMesh doesn't support any more a color/vertex, it caused too much overhead in the code to support and wasn't flexible really.

If the TVMesh no longer supports color veritces, I would recommend removing the color args from the addvertex method.  It is confusing to have a required arguement that does nothing.

I also have been using colored vertices in a couple of RC2 apps, primarily with multi-colored line strips, and some meshes with Tristrips that are vertex colored as opposed to textured.  Unlike regress, I am not trying to  change the vertex colors dynamically, just set them when I add the vertex.  Since the color of the vertex is determined by a number of factors at the time it is added, it is impossible to "Pre-create" a texture.  I am essentially using the line strip to provided quick visual analysis of events in an entities history (Engine on = color_1, coast = color_2, detected by sensor = color_3, Targetted by missile = color_4, etc).  In this manner, I can look at the history trail any element and quickly determine if it is behaving appropriately, or if I have a problem in my simulation, without digging into the binary results data.
I know that I can add a new mesh with the approptiate color for each line segment, but this gets really ugly( and slow) when I have 1000 entities in my simulation.
I know that there was some overhead, but the functionality that you had in RC2 was really working well for me.  Any idea for a work around would be greatly appreciated.

[shellshock]

@JohnnyC

Was fixed today

Vertex color setting is fixed, or unused vertex color args removed?
Sylv seemed to indicate that the ability to set vertex colors had been intentionally removed.

[regress]

bump... any suggestions/clarifications?

cheers,
ben

[shellshock]

bump

[regress]

bumpidy-bump

[Zaknafein]

Is this still true? I find it pretty limitative, I wanted to implement precomputed ambient occlusion into the vertex color channel and I just cannot set it with SetVertex. At least I don't get any effect.

Is there any workaround? I tried writing to tu2/vu2 and didn't get any more success, accessing it with the TEXCOORD1 set has blank (1, 1) values everytime.

Edit : Oops, didn't see this was in the 6.2 section. I'm having this problem in 6.5.

[Hypnotron]

You can successfully set the vertex color in 6.5 using a custom mesh vertex format.  I've done it and it works.

[Zaknafein]

Indeed it does.
Just had to set the right mesh format... hehe.

[DanDixon]

In 6.5 the right mesh format is (where theMesh is a TVMesh):

Code:

theMesh.SetMeshFormat CONST_TV_MESHFORMAT.TV_MESHFORMAT_DIFFUSE + CONST_TV_MESHFORMAT.TV_MESHFORMAT_NOLIGHTING

Related info here:
http://www.truevision3d.com/forums/tv3d_sdk_65/mesh_setcolor-t15694.0.html

[jviper]

I can't see the code. The scroll bar is in the way. Hey uh that may have to be fixed because I notice that happening often when posting code.

So anyway....the other option ofourse would be simply to use a custom shader.