Topics created by JohnThomas

Hey,

Please note that both options, a modifier that changes the number of points of its host, and a spline generator that has another spline as an input, are not great. We have internally two cases that do exactly these two things: The bevel deformer and the spline mask spline generator. But third parties do not easily replicate both because they require detailed knowledge of our API and in some cases access to non-public things.

For deformers, Ilia already gave a great explanation. In short, if you are not careful, you can crash Cinema 4D. For the other case, a spline generator which takes another spline as an input, you will run into the issue that splines are not intended to have as objects as inputs. This means you are not getting passed a HierarchyHelp in ObjectData::GetContour with which you could ensure that your child object dependencies are up to date (because by default they are being built after you). There are patterns to solve this, and you run here at worst into the problem of a laggy/malfunctioning plugin and no crashes. But I would still advise going down that rabbit hole when avoidable.

When you really must do this and now want to go down the spline generator road, I would recommend opening a new topic on that before you start.

Cheers,
Ferdinand

@ferdinand
Thanks for the response, I figured that would be the case.

John Thomas

@ferdinand
Thanks for the detailed response, unfortunately what I'm trying to do doesn't seem viable.

John Thomas

@ferdinand Thanks for the response.

That's what I was afraid the situation would be, I believe I have a work around that will be able to fulfill what I need it to do.

John Thomas

@ferdinand

Thanks for the response.

That's what I was afraid of. 😦

John Thomas

Hi @JohnThomas,

sorry again for a long delay in the answer.

Now I see that in this specific setup when the bitmap button is used inside the field layer plugin, the message MSG_DESCRIPTION_COMMAND is not propagated to the field layer plugin, which sounds like a bug to me. I've checked the code and it's likely due to the field layer data object being somewhat special comparing to others. I will double check this with a corresponding developer, once he's back from parental leave, and create a bug report for this to be fixed.

Unfortunately, I cannot offer you any workaround for this before it's fixed.

Cheers,
Ilia

Thanks for the response. I'll see if this does what I need it to

John Thomas

Hi,

without further feedback, we will consider this thread as solved by Monday and flag it accordingly.

Cheers,
Ferdinand

Hi @JohnThomas , the data passed in the method is actually carrying the destination object.

The code should look like

... if (type == MSG_EDITABLE_END) { BaseObject* dstObject = static_cast<BaseObject*>(data); if (!dstObject) return false; BaseObject* child = dstObject->GetDown(); if (child) { child->Remove(); BaseObject::Free(child); } } ...

Cheers, R

Thanks for the response, that was exactly what I needed.

John Thomas

Thanks for the detailed response @r_gigante, sorry about the late post. I wasn't trying to move an object into the camera view, I was just trying to get the information about a cameras perspective so that if necessary I could create an object that would have an orientation parallel to it.

John Thomas

Thanks for the response, that's exactly what I needed.

John Thomas

Hi @JohnThomas thanks for the follow-up.

I see the point, but when you're dealing with uniform splines you've also to consider the number of intermediate points you're using to approximate the natural spline. With a natural parametrization even with a low number of points the vertexes position returned from SplineHelp::GetPosition() are accurate, whilst with a uniform parametrization you get higher accuracy as long as you increase the number of points.

See the data below, where first coordinate is the position returned by the SplineHelp::GetPosition and the second coordinate is returned by quering the points vector PointsObject::GetPointR()

Natural_4 [4, 2123.461, BEZIER, 1] 0 [0/0], 0.000[0.000] --> (200.000,0.000,0.000) -- (200.000,0.000,0.000) 1 [17/0], 0.250[530.865] --> (0.000,700.000,0.000) -- (0.000,700.000,0.000) 2 [34/0], 0.500[1061.731] --> (-200.000,0.000,0.000) -- (-200.000,0.000,0.000) 3 [51/0], 0.750[1592.596] --> (0.000,-200.000,0.000) -- (0.000,-200.000,0.000) Uniform_4 [4, 2107.332, BEZIER, 2] 0 [0/0], 0.000[0.000] --> (200.000,0.000,0.000) -- (200.000,0.000,0.000) 1 [7/0], 0.350[737.566] --> (4.370,699.695,0.000) --> (0.000,700.000,0.000) 2 [14/0], 0.700[1475.132] --> (-199.849,8.692,0.000) -- (-200.000,0.000,0.000) 3 [17/0], 0.850[1791.232] --> (-4.394,-199.953,0.000) -- (0.000,-200.000,0.000) Uniform_16 [4, 2107.332, BEZIER, 2] 0 [0/0], 0.000[0.000] --> (200.000,0.000,0.000) -- (200.000,0.000,0.000) 1 [7/0], 0.350[737.566] --> (4.370,699.695,0.000) -- (0.000,700.000,0.000) 2 [14/0], 0.700[1475.132] --> (-199.849,8.692,0.000) -- (-200.000,0.000,0.000) 3 [17/0], 0.850[1791.232] --> (-4.394,-199.953,0.000) -- (0.000,-200.000,0.000) Uniform_128 [4, 2124.555, BEZIER, 2] 0 [0/0], 0.000[0.000] --> (200.000,0.000,0.000) -- (200.000,0.000,0.000) 1 [182/0], 0.353[749.359] --> (-1.373,699.970,0.000) -- (0.000,700.000,0.000) 2 [363/0], 0.703[1494.600] --> (-199.996,1.279,0.000) -- (-200.000,0.000,0.000) 3 [440/0], 0.853[1811.636] --> (1.380,-199.995,0.000) -- (0.000,-200.000,0.000)

If no further help is needed please don't forget to set the thread as Solved.

Cheers, R

Hello,

as Riccardo has pointed out, AdditionalIncludeDirectories has nothing to do with DLLs. It is used to define search paths for header files. See Additional include directories. It was never valid.

Also, looking at the error, the plugin was installed into the C:/Program Files folder. In R21, there is no reason to install plugins there; one can install plugins at any location and just tell Cinema 4D the plugin path.

best wishes,
Sebastian

Thanks for the response.

I changed my code to match the example you gave and it seems like that fixes the immediate problem I was running into. It will take some tests to verify if this covers all of the circumstances that I need it to.

I appreciate the help.

John Thomas

@m_magalhaes Thanks for the response Manuel, that was exactly what I needed.

John Thomas

hello,

if you have nothing to add, this thread will be considered as 'solved' and will be closed tomorrow

Cheers
Manuel

Thanks for the reply, it really helped me out.

John

Thank you for your answer. That was exactly what I was looking for.

John Thomas