Drawing Mesh as cursor

Guest · Post by **Guest** » Fri Mar 19, 2004 7:45 pm

I want to show several loaded models (meshes) and let the user pick them and move them around (as the cursor), what would be a good method
to achieve this ?

Tyn · Post by **Tyn** » Fri Mar 19, 2004 8:56 pm

You could just get the current position of the cursor each frame and update the position of two of the axis ( i.e. the two facing the camera ) but that would be pretty slow.

Couldn't you just use a billboard of what you are dragging when you "pick up" a mesh? Seems to me that it would be a lot easier.

Guest · Post by **Guest** » Fri Mar 19, 2004 8:58 pm

billboards are not really the solution.
I try explain again what i want to do:
i want irrlicht to render a level (OctTree) and from a library (prefabs) i want to pick up meshes and place them in the level.
I want also just to render a mesh (still being able to scale) and moving it around on the 2d screen.

Tyn · Post by **Tyn** » Fri Mar 19, 2004 9:13 pm

Like a modelling tool? That's possible. There may be a better way but I would update the mesh position while the cursor returns a LMB press, as long as the the cursor is pressed you are dragging the mesh, then just update the mesh positions from the cursor position. You'd have to find some way of changing the axis being moved ( XY, XZ etc ) you could do that by using the RMB as well.

Serg Nechaeff · Post by **Serg Nechaeff** » Sat Mar 20, 2004 12:54 am

here you may move the object within x (-300,300) and y (-220,200) axis:

Code: Select all

   position2d<f32> m = m_device->getCursorControl()->getRelativePosition ();
	vector3df v = nodPlayer->getPosition();
	
    if (m.Y>0.5f && v.Y>-220 ) v.Y-=10;
	if (m.Y<0.5f && v.Y<200  ) v.Y+=10;

    if (m.X<0.5f && v.X>-300 ) v.X-=10;
	if (m.X>0.5f && v.X<300  ) v.X+=10;

	m.X=0.5f;
	m.Y=0.5f;

	m_device->getCursorControl()->setPosition (m);

	nodPlayer->setPosition(v);

hope you get the idea

Guest · Post by **Guest** » Sat Mar 20, 2004 11:33 am

thanks for the hints.
Is it possible to have irrlicht to render 2 different "worlds" at the same time ?
I mean the scene-menger haveing 2 separate worlds.
What i want to do is (yes, its sort of modelling tool) to render models in a separate window an show them independent from the actual level.

Serg Nechaeff · Post by **Serg Nechaeff** » Sun Mar 21, 2004 12:47 am

i dont know

you have to check it out yoself!