D3D line thickness not honoured

[itzjac]

I'm using draw3DLine funciton with OpenGL driver without problems, I need to make big the thickness of the line (as well to the end/start points of that line) I wonder if there is some parameter I can set as in OpengL state

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 glPointSize(6.0f;)

I don't wan to use a model to get the same effect but in the end if it's very difficult I will do...

[Acki]

you'll have to set the material and there you can define the thickness for the line...

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// set the material
SMaterial theMat;
theMat.Thickness = 10;
driver->setMaterial(theMat);

// and maybe set the transformation
driver->setTransform(video::ETS_WORLD, core::matrix4());

// then draw the line(s)

but all this you also can find in the API at the description of draw3DLine (it's realy a magic file) !!!

[itzjac]

Thanks Acki I see I can set the material property I want in the draw3DLine section with setMaterial and it has lot of custom parameters... (solved)

[starphoenix]

reviving a dead topic, but I'm trying to use the material thickness and its not drawing the lines with the appropriate thickness, or color that i specified. im just trying to draw springs in my physics sim as lines between the two bodies they are attatched to, with interpolated colors depending on if its being stretched or compressed:

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			core::matrix4 mat1;
			driver->setTransform(video::ETS_WORLD, mat1);
			Spring *s = springs[i];
			Vector3D st = bodies[s->ID1]->GetPos();
			Vector3D en = bodies[s->ID2]->GetPos();
			core::vector3df start(st[X], st[Y], st[Z]); 
			core::vector3df end(en[X], en[Y], en[Z]);
			video::SColor col(255,255,255,255);
			//Going to interpolate color to indicate compression or tension
			if(s->GetStretch() < 0)
			{
				col = col.getInterpolated(video::SColor(255,255,64,64), (-s->GetStretch()/s->GetLength()));
			}
			else if(s->GetStretch() > 0)
			{
				col = col.getInterpolated(video::SColor(255,64,255,64), (s->GetStretch()/s->GetLength()));
			}
			video::SMaterial mat;
			mat.Thickness = 10;
			mat.DiffuseColor = col;
			driver->setMaterial(mat);
			driver->draw3DLine(start, end, col);

but after setting the material im just getting 1 pixel wide lines in all black.

[starphoenix]

I fixed the coloring issue, I had to set lighting to false, but I'm still not getting the adjusted thickness

[itzjac]

Is your driver OpenGL?... I have read that OpenGL is the best option if you want to modify such parameters... but your code is ok as I can see...
With the general proccess and OpengL

Code: Select all

// set the material
SMaterial theMat;
theMat.Thickness = 10;
driver->setMaterial(theMat);

// and maybe set the transformation
driver->setTransform(video::ETS_WORLD, core::matrix4());

// then draw the line(s)

you must not have any problem..

[starphoenix]

I was using DX9, openGL does indeed work though, thanks

[aheymann]

Does this mean thicknessing is not supported in DirectX?

[JP]

Yep.

[aheymann]

That is a major problem! Do you know if there are any plans to support it, or might the way to solve it, to use a shader (YIKES)!

Anton

[JP]

instead of drawing a 3D line you could just draw a cube stretched between the two desired points.

[MasterGod]

Better be a sphere IMO where you scale only one axis to make it look like a line.

[JP]

Why a sphere? That wouldn't really end up looking like a line as the thickness of it would decrease from the centre to the ends... Plus it would be a lot more polys to render

[bitplane]

I guess CD3D?Driver::draw3DLine should draw a quad instead of a line if the material's thickness is anything other than 1.0f, I'll move this thread to bug reports and add to the tracker as a minor bug.

Done: http://sourceforge.net/tracker/index.ph ... tid=540676

[hybrid]

Well, it would be a billboard then, because you have to align it with the camera. Not that nice, but due to the limitation of D3D unavoidable.