Rojo3d. 3D engine for Construct 2

megatronx

I have no input on that other than yes you can access values in an array immediately after you set them.

Maybe your logic just isn’t correct for what you’re doing. It could be helpful to output what’s going on at each step to debug things. Or maybe simplify the data you’re using to be able to analyze what’s it’s doing better.

As is I can’t make sense of it. Arrays are useful but i find code using them often unreadable

Thanks for reply. Ok. But here I'm only working with one number, dividing it and adding to another array cell, o this is as simple as can be. When I'm checking < in condition, the division by 10 in action doesn't divide by 10. Will investigate further then.

EDIT. It's working today :> Now I'm literally few days away from completing the mesh gen stage :)

R0J0hound megatronx

Can any of you help me please?

I am trying to convert 3D pos into 2D pos, but I had no success...

{I forgot to completely translate the comment from portuguese to english, but

the function call is:

Function.Call("Convert3Dto2D", <layername>, x, y, z, camx, camy, camz)

and ignore the extra things that are written there, it was for testing and it failed}

*There is some events that were cut off... But it is basically:

Rojo3D.orientXX("camera")+DedicatedTo3DConversion.Get("X") +

Rojo3D.orientXY("camera")+DedicatedTo3DConversion.Get("Y") +

Rojo3D.orientXZ("camera")+DedicatedTo3DConversion.Get("Z")

...... (and similar to the rest)

* The yellow box is the image that I am trying to set the 2D pos from the 3D pos conversion.

* The 3D pos is from that mesh that looks a lot like a Minecraft piston block.

But the conversion isn't accurate and sometimes when I rotate the camera It gets off the object.

Also, if I go foward the object it stills visible at screen

Also+ , If I turn around from that position from last image I won't see it anyway and inside the debugg console will show it's position will be really away.

*I think with these I could achieve the '3D text'

I can't help you with that. I only use x,y,z from 3d plugin, but I do camera rotation with my own system that works with c2 stuff and is understandable to me ( I yet to understand rotation vectors and how to use them )

This is using Simple Mouse Lock plugin

I am also using something to similar to what you did. Although I am not talking about player rotation/orientation. I am trying to figure out what those guys who developed 3D things were thinking (laughs even more like the Joker)... I am becoming crazzy ;(

What I am trying to do is the function in most engines called as "WorldToScreenCoordinates(layer, posx, posy, posz)" and Construct 3 also have that, right now I just tried reading the code they have (Opening the 3d example project 'high-tech vision' and pression 'F12' to open Google Chrome DevTools and searched at 'Sources') and it was a bit complicated to find where it was since it was... well a big code :P ...

Anyway, I found it, but I still don't get some parts and for the second one I guess I have answer...

First! How do I get the value of 'viewportMatrix'

Second! How do I get the value of 'projectionMatrix'?

Is the First the values of (orientXX, orientXY, orie...)?

The second one I think it is named as 'projMat' inside R0J0hound runtime.js code, I just have to figure out how to program javascript and add it inside Construct 2 as an expression.

This is for "3D Text", like when you pass nearby a NPC and have a ballon for dialog, or to display enemy health bar or as I said '3D texting'! :)

Thanks R0J0!

I will test it right now!

This will be edited:

Status: Final result: it doesn't BUT! You gave an idea and I think I might now can move on!

Plus: I think I almost found a 'formula' by testing some other formulas and combining them and testing, etc.

* Dictionary: DedicatedTo3DConversion

* Add keys:

** DedicatedTo3DConversion.Get("Dist") = distance(x, y, camx, camy)

** Camera2D.Angle == Rojo Z rotation

** PlayerAngleY.Angle == Rojo Y rotation

** DedicatedTo3DConversion.Get("LayerWidth") = viewportRight(Layer)-viewportLeft(Layer)

** DedicatedTo3DConversion.Get("LayerHeihgt") = viewportBottom(Layer)-viewportTop(Layer)

X2d: (DedicatedTo3DConversion.Get("Dist") * cos(Camera2D.Angle) * DedicatedTo3DConversion.Get("LayerWidth")*2) /(DedicatedTo3DConversion.Get("Dist") * cos(Camera2D.Angle) +DedicatedTo3DConversion.Get("LayerWidth"))

Y2d: (DedicatedTo3DConversion.Get("Z") - DedicatedTo3DConversion.Get("CamZ")* sin(-PlayerAngleY.Angle) *DedicatedTo3DConversion.Get("LayerHeight")) /DedicatedTo3DConversion.Get("Dist") * cos(-Camera2D.Angle) + DedicatedTo3DConversion.Get("LayerHeight")/2

*The last time I tested it was almost working just have to do some changes for when the object isn't at the players angle of view, but this is for later.

If I'd be doing a text bubble, I guess I'd work with billboards and would look for a way to turn text in to a texture. Would have to load in additional bubble graphics. Any thought how to do it with PASETER R0J0hound ?

As for field of view, would love to make a 3d camera cone for tests, but if I won't I'll work with what c2 offers, so fov plugin. I think it's much better to work with what there is in c2 already and with additional events extend those plugins to work in 3d then inventing all of the systems from scratch if it isn't necessarry.

Srry, What is scrollx?

Plus, you talked about wikipedia and I search and found this:

(I forgot it was translated, but here the link: https://en.wikipedia.org/wiki/3D_projection)

... let's see what I can get... (I should had listened to math class lol)

** I didn't understand how to get the E value {E xyz}? It's the depth? It's the FOV? How?