last post is how I load nodes as an array using in realbasic

[speedy15453]

I am loading 48 meshes that I would like to animate with user input.
I would like to use a loop to make changes in the node positions.
I am using Irrlicht in real studio, the Franklin3d plugin.
I have not done any programming since 1985 when I was learing Pascal.

Here is the code for the meshes I am loading. Feel free to point out any newbie mistakes:

dim mesh1 as scene_IAnimatedMesh
mesh1 = scene.getMesh("test/p1.3ds")
dim anim as scene_ISceneNodeAnimator
dim node as scene_IAnimatedMeshSceneNode
node = scene.addAnimatedMeshSceneNode(mesh1)
if node <> nil then
dim position as core_vector3df = new core_vector3df(0,0,30)
node.setPosition(position)
dim mat as integer
dim Texture as video_ITexture
Texture = driver.getTexture("test/yellow.bmp")
node.setMaterialTexture(0,Texture)
node.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
end if

dim mesh2 as scene_IAnimatedMesh
mesh2 = scene.getMesh("test/p2.3ds")
dim anim2 as scene_ISceneNodeAnimator
dim node2 as scene_IAnimatedMeshSceneNode
node2 = scene.addAnimatedMeshSceneNode(mesh2)
if node2 <> nil then
dim position2 as core_vector3df = new core_vector3df(0,0,30)
node2.setPosition(position2)
dim Texture2 as video_ITexture
Texture2 = driver.getTexture("test/red.bmp")
node2.setMaterialTexture(0,Texture2)
node2.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
end if

I repeat this 48 times

I tried to do this instead:

dim j As integer
dim s,partarray(49) as string
dim mesharray(49) as scene_IAnimatedMesh
dim animarray(49) as scene_ISceneNodeAnimator
dim nodearray(49) as scene_IAnimatedMeshSceneNode
dim textureArray(49) As video_ITexture
dim position as core_vector3df = new core_vector3df(0,0,30)
for j = 1 to 48
s = str(j)
partarray(j) = "p" + s + ".3ds"
mesharray(j) = scene.getMesh(str(partarray(j)))
msgbox partarray(j)
nodearray(j) =scene.addAnimatedMeshSceneNode(mesharray(j)
if nodearray(j) = nil then msgbox partarray(j)
Texturearray(j) = driver.getTexture("test/yellow.bmp")
nodearray(j).setMaterialTexture(0,textureArray(j))
nodearray(j).setPosition(position)
next

Thanks for looking

[slavik262]

I'm confused. Are you using Irrlicht Lime with VB.NET?

[greenya]

speedy15453,

In Irrlicht all nodes stored as a tree. So there is a root of this tree, you can get it by sceneManager->getRootSceneNode(). Then use getChildren() to get the children of this single node only (you will not get children of children or deeper) -- you get only 1 level of deep.

So, if what i said above is clear, and if you need an array, you can do next:
- if you add all nodes only to the root node, so use its getChildren() and it would be your array of all the nodes;
- you may have your own array of pointers of all necessary nodes; so when you add a node to any parent, you just add its pointer to your array too, so you have a simple array access to all your nodes. But do not forget, if you remove some node from the SceneManager, you also must to remove it from your array;
- if you need an array of nodes and you do not care of performance, you can build an array of all the nodes on the fly each time you need it using recursion (by going from the root node to each child and its child and so on);

I would recommend second variant. Just wrap your adding/removing nodes functionality to some methods which will be responsible for adding/removing nodes in all the code.

I'm confused. Are you using Irrlicht Lime with VB.NET?

No, it is not Lime, because i don't recognize types.

[speedy15453]

I'm having trouble with the child / parent nodes

Do you have to setparent first?

Can you show me what the code should look like with one parent and 2 child nodes.

If you rotate the parent node will the child nodes match the parent's movements?

Thanks for trying to help!

By the way I am using Franklin3d (Irrlicht plugin) for RealBasic.
I have been converting whatever code I can to work in this IDE

[greenya]

Do you have to setparent first?

You do this when you add node to the manager. For example look at ISceneManager interface ( http://irrlicht.sourceforge.net/docu/cl ... nager.html ), every call of addXXXXXX() has a paramter "parent", which looks like "ISceneNode *parent=0", so if you pass 0, you add node to the root, if you pass particular scene node, you add the child to it.

Can you show me what the code should look like with one parent and 2 child nodes.

Here it is:

Code: Select all

ISceneNode* cube1 = smgr->addCubeSceneNode(20.0f, 0, -1, vector3df(0, 0, 0));
ISceneNode* cube11 = smgr->addCubeSceneNode(20.0f, cube1, -1, vector3df(50, 0, 0));
ISceneNode* cube12 = smgr->addCubeSceneNode(20.0f, cube1, -1, vector3df(0, 50, 0));
ISceneNode* cube13 = smgr->addCubeSceneNode(20.0f, cube1, -1, vector3df(0, 0, 50));
ISceneNode* cube131 = smgr->addCubeSceneNode(20.0f, cube13, -1, vector3df(0, 0, 50));

we added cube1 to the root, and then added cube11, cube12 and cube13 to children of cube1. Also cube131 is a child of cube13.

If you rotate the parent node will the child nodes match the parent's movements?

Yes. According to the code above, if you move, rotate or scale cube1, the, all children (including cube131) will have also updated. Do not worry about value of getPosition() of cube131, it will be the same as you set it before using setPosition(). The real position calculates just before rendering. I'm just saying next:

Code: Select all

cube131->setPosition(vector3df(100,0,0));
cube1->setPosition(vector3df(50, 60, 70));

after this position of cubes you see in the viewport will be updated, but calling to cube131->getPosition() will return vector3df(100,0,0), because its the position related to its parent cube13 and it will not be changed until you do so.

By the way I am using Franklin3d (Irrlicht plugin) for RealBasic.

All above i described how it works in native Irrlicht Engine (C++), but i do not know how it looks like in Franklin3d for RealBasic.

[speedy15453]

My IDE won't accept parameters to add parent when creating the nodes from mesh input.(it will for a light, billboard or primatives) I'm sure there is a way but I tried every variation of the code.

I need to do it on the fly anyway to change groups of children to get the desired movement of the groups of nodes I need for the program.

My problem now is upon accepting input "X" I set the parent of
"node1"( a mesh I want to be able to rotate around a sphere) to
"nodes"(the sphere) As soon a "x" is pressed "node1" dissapears from the scene. All the other nodes remain and rotate. Then if "X" is entered again the program crashes.

My question is what is happening to node1? It seams that after I set it as a child of the sphere it is deleted from the scene.

I also tried to to use the the addCHild to make the pointer and this had no effect what so ever.


Am I missing something.
Is there more code that I need to use setParent, or can it be used on the fly.

Code: Select all

dim sphere1 as scene_IAnimatedMesh
  sphere1 = scene.getMesh("test/sphere1.3ds")
  dim nodes as scene_IAnimatedMeshSceneNode
  nodes = scene.addAnimatedMeshSceneNode(sphere1)
  if nodes <> nil then
    dim positions as core_vector3df = new core_vector3df(0,0,0)
    nodes.setPosition(positions)
    dim Textures as video_ITexture
    Textures = driver.getTexture("test/blue2.bmp")
    nodes.setMaterialTexture(0,Textures)
  end if
  
  dim mesh1 as scene_IAnimatedMesh
  mesh1 = scene.getMesh("test/p1.3ds")
  dim node1 as scene_IAnimatedMeshSceneNode
  node1 = scene.addAnimatedMeshSceneNode(mesh1)
  if node1 <> nil then
    dim position as core_vector3df = new core_vector3df(0,0,0)
    node1.setPosition(position)
    dim Texture as video_ITexture
    Texture = driver.getTexture("test/yellow.bmp")
    node1.setMaterialTexture(0,Texture)
    node1.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
  end if
  
  dim mesh2 as scene_IAnimatedMesh
  mesh2 = scene.getMesh("test/p2.3ds")
  dim node2 as scene_IAnimatedMeshSceneNode
  node2 = scene.addAnimatedMeshSceneNode(mesh2)
  if node2 <> nil then
    dim position2 as core_vector3df = new core_vector3df(0,0,0)
    node2.setPosition(position2)
    dim Texture2 as video_ITexture
    Texture2 = driver.getTexture("test/red.bmp")
    node2.setMaterialTexture(0,Texture2)
    node2.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
  end if

  while device.run()
   'rotate sphere and children 45 degrees 
    dim j as integer
    
    if IsKeyDown(EKEY_CODE.KEY_KEY_X) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_X) = false
      node2.setParent(nodes)
      dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
      dim color2 as video_SColor = new video_SColor(2,2,2,2)
      for j = 1 to 45
        xs = xs +1
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        bool = driver.endScene()
      next
    end
    '  rotate sphere only 45 degrees
    if IsKeyDown(EKEY_CODE.KEY_KEY_Y) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_Y) = false
      for j = 1 to 45
        ys = ys +1
        dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
      next
    end
    ' rotate sphere only 45 degrees 
    if IsKeyDown(EKEY_CODE.KEY_KEY_Z) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_Z) = false
      for j = 1 to 45
        zs = zs +1
        dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
      next
    end
    ' rotate node2 45 degrees around sphere
    if IsKeyDown(EKEY_CODE.KEY_KEY_K) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_K) = false
      
      for i =1 to 45
        y2=0
        x2=0
        dim position2 as core_vector3df = new core_vector3df(x2,y2,z2)
        z2=z2 +1
        position2 = new core_vector3df(x2,y2,z2)
        node2.setRotation( position2 )
        node2.updateAbsolutePosition()
        if x2 =360 then x2=0
        if y2 =360 then y2=0
        if z2 = 360 then z2=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
        dim nam,str as string
        nam = driver.getName()
        str = "Speegle's Sphere    " + Str(x) + " " + str(y) + " " + str(z) +"  "+ Str(x2) + " " + str(y2) + " " + str(z2)
        device.setWindowCaption(str)
      next
      dim position2  as core_vector3df = new core_vector3df(x2,y2,z2)
      node2.updateAbsolutePosition()
    end
    
    
    dim color2 as video_SColor = new video_SColor(2,2,2,2)
    bool = driver.beginScene(true,true,color2)
    scene.drawAll()// draw the 3d scene
    'gui.drawAll()// draw the gui environment (the logo)
    bool = driver.endScene()
    
    
    
    dim nam,str as string
    nam = driver.getName()
    str = "Speegle's Sphere    " + Str(x) + " " + str(y) + " " + str(z) +"  "+ Str(x2) + " " + str(y2) + " " + str(z2)
    device.setWindowCaption(str)
    
    
  Wend
  
  //return visible of cursor
  cursor.setVisible(true)
  
  'In the end, delete the Irrlicht device.
  
  bool = device.drop()

Thanks For Looking, Maybe I should just start learning C
John

[speedy15453]

My IDE won't accept parameters to add parent when creating the nodes from mesh input.(it will for a light, billboard or primatives) I'm sure there is a way but I tried every variation of the code.

I need to do it on the fly anyway to change groups of children to get the desired movement of the groups of nodes I need for the program.

My problem now is upon accepting input "X" I set the parent of
"node1"( a mesh I want to be able to rotate around a sphere) to
"nodes"(the sphere) As soon a "x" is pressed "node1" dissapears from the scene. All the other nodes remain and rotate. Then if "X" is entered again the program crashes.

My question is what is happening to node1? It seams that after I set it as a child of the sphere it is deleted from the scene.

I also tried to to use the the addCHild to make the pointer and this had no effect what so ever.


Am I missing something.
Is there more code that I need to use setParent, or can it be used on the fly.

Code: Select all

dim sphere1 as scene_IAnimatedMesh
  sphere1 = scene.getMesh("test/sphere1.3ds")
  dim nodes as scene_IAnimatedMeshSceneNode
  nodes = scene.addAnimatedMeshSceneNode(sphere1)
  if nodes <> nil then
    dim positions as core_vector3df = new core_vector3df(0,0,0)
    nodes.setPosition(positions)
    dim Textures as video_ITexture
    Textures = driver.getTexture("test/blue2.bmp")
    nodes.setMaterialTexture(0,Textures)
  end if
  
  dim mesh1 as scene_IAnimatedMesh
  mesh1 = scene.getMesh("test/p1.3ds")
  dim node1 as scene_IAnimatedMeshSceneNode
  node1 = scene.addAnimatedMeshSceneNode(mesh1)
  if node1 <> nil then
    dim position as core_vector3df = new core_vector3df(0,0,0)
    node1.setPosition(position)
    dim Texture as video_ITexture
    Texture = driver.getTexture("test/yellow.bmp")
    node1.setMaterialTexture(0,Texture)
    node1.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
  end if
  
  dim mesh2 as scene_IAnimatedMesh
  mesh2 = scene.getMesh("test/p2.3ds")
  dim node2 as scene_IAnimatedMeshSceneNode
  node2 = scene.addAnimatedMeshSceneNode(mesh2)
  if node2 <> nil then
    dim position2 as core_vector3df = new core_vector3df(0,0,0)
    node2.setPosition(position2)
    dim Texture2 as video_ITexture
    Texture2 = driver.getTexture("test/red.bmp")
    node2.setMaterialTexture(0,Texture2)
    node2.setMaterialFlag(E_MATERIAL_FLAG.EMF_LIGHTING,true)
  end if

  while device.run()
   'rotate sphere and children 45 degrees 
    dim j as integer
    
    if IsKeyDown(EKEY_CODE.KEY_KEY_X) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_X) = false
      node2.setParent(nodes)
      dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
      dim color2 as video_SColor = new video_SColor(2,2,2,2)
      for j = 1 to 45
        xs = xs +1
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        bool = driver.endScene()
      next
    end
    '  rotate sphere only 45 degrees
    if IsKeyDown(EKEY_CODE.KEY_KEY_Y) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_Y) = false
      for j = 1 to 45
        ys = ys +1
        dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
      next
    end
    ' rotate sphere only 45 degrees 
    if IsKeyDown(EKEY_CODE.KEY_KEY_Z) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_Z) = false
      for j = 1 to 45
        zs = zs +1
        dim positions as core_vector3df = new core_vector3df(xs,ys,zs)
        positions = new core_vector3df(xs,ys,zs)
        nodes.setRotation( positions )
        nodes.updateAbsolutePosition()
        if xs =360 then x=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
      next
    end
    ' rotate node2 45 degrees around sphere
    if IsKeyDown(EKEY_CODE.KEY_KEY_K) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_K) = false
      
      for i =1 to 45
        y2=0
        x2=0
        dim position2 as core_vector3df = new core_vector3df(x2,y2,z2)
        z2=z2 +1
        position2 = new core_vector3df(x2,y2,z2)
        node2.setRotation( position2 )
        node2.updateAbsolutePosition()
        if x2 =360 then x2=0
        if y2 =360 then y2=0
        if z2 = 360 then z2=0
        dim color2 as video_SColor = new video_SColor(2,2,2,2)
        bool = driver.beginScene(true,true,color2)
        scene.drawAll()// draw the 3d scene
        'gui.drawAll()// draw the gui environment (the logo)
        bool = driver.endScene()
        dim nam,str as string
        nam = driver.getName()
        str = "Speegle's Sphere    " + Str(x) + " " + str(y) + " " + str(z) +"  "+ Str(x2) + " " + str(y2) + " " + str(z2)
        device.setWindowCaption(str)
      next
      dim position2  as core_vector3df = new core_vector3df(x2,y2,z2)
      node2.updateAbsolutePosition()
    end
    
    
    dim color2 as video_SColor = new video_SColor(2,2,2,2)
    bool = driver.beginScene(true,true,color2)
    scene.drawAll()// draw the 3d scene
    'gui.drawAll()// draw the gui environment (the logo)
    bool = driver.endScene()
    
    
    
    dim nam,str as string
    nam = driver.getName()
    str = "Speegle's Sphere    " + Str(x) + " " + str(y) + " " + str(z) +"  "+ Str(x2) + " " + str(y2) + " " + str(z2)
    device.setWindowCaption(str)
    
    
  Wend
  
  //return visible of cursor
  cursor.setVisible(true)
  
  'In the end, delete the Irrlicht device.
  
  bool = device.drop()

Thanks For Looking, Maybe I should just start learning C
John

[speedy15453]

Code: Select all

    if IsKeyDown(EKEY_CODE.KEY_KEY_P) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_P) = false
      node2.setParent(nodes)
    end
    

It still disapears. If I press "K" after it disapears to rotate node2
45 degrees the program crashes.

[speedy15453]

Code: Select all

node2 = scene.addAnimatedMeshSceneNode(mesh2,nodes.get_parent)

Each piece will move by itself or with the parent.

now to figure out how to removeChild and set parent on the fly

[speedy15453]

this code adds and removes child for my IDE
(realstudio with franklin3d"Irrlicht plugin")

Code: Select all

    if IsKeyDown(EKEY_CODE.KEY_KEY_P) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_P) = false
      dim newParent as scene_ISceneNode
      newParent = scene.getRootSceneNode()
      node1.setParent(newParent)
      node1.setrotation(positions)
    end
    
    if IsKeyDown(EKEY_CODE.KEY_KEY_O) = true then
      KeyIsDown(EKEY_CODE.KEY_KEY_O) = False
      dim newParent as scene_ISceneNode
      newParent = nodes.get_parent
      node1.setParent(newParent)
      node1.setrotation(positions)
    end

now I need to figure out how to make the nodes remain in the same position when switching parents, currently they jump around to their default positions.

[greenya]

now I need to figure out how to make the nodes remain in the same position when switching parents, currently they jump around to their default positions.

Here is my thoughs:


And the implementation that should do the trick:

Code: Select all

// childNode must not be 0
// childNode may have no parent
// newParentNode may be 0

void ChangeParentWithKeepingAbsolutePosition(SceneNode* childNode, SceneNode* newParentNode)
{
	vector3df childNodePos = childNode->getPosition();

	SceneNode* oldParentNode = childNode->getParent();
	vector3df oldParentAbsolutePos = oldParentNode == 0 ? vector3df(0, 0, 0) : oldParentNode->getAbsolutePosition();

	vector3df newParentAbsolutePos = newParentNode == 0 ? vector3df(0, 0, 0) : newParentNode->getAbsolutePosition();

	childNode->setParent(newParentNode);
	childNode->setPosition(childNodePos + oldParentAbsolutePos - newParentAbsolutePos);
}

p.s.: this function does not take in account the rotation. Rotation adds more math (with matrices i believe). Personally i have no idea how to write universal function that would calc all correct.

[speedy15453]

I used 4 spheres as parents
parent sphere - child sphere(45 degree offset) - piece node
parent sphere2 - child sphere2(45 degree offset)

to maintain positions I use the first parent spheres to rotate vertically, horizontally, and the first child sphere to rotate diagonally.

If there are pieces that should not rotate I make the second set of spheres parent and unrotate the pieces then reparent with the first set of spheres.

cpu usage is almost 100% - not good, But I am going to finish this before I explore other options.

I can not find the code to return the x,y,z values of absolutePositon.
I know I have seen it in the forum i was wondering if anyone could help.

here is some of my code....

Code: Select all

        node1.updateAbsolutePosition () 
        absPos= node1.getAbsolutePosition ()
        'x = abspos.get x()
        

absPos is core_vector3df

I need the values to determing which node should move and which should remain stationary.

Thanks!

[speedy15453]

Code: Select all

  dim node_array(255) as scene_ISceneNode
  scene.getSceneNodesFromType(ESCENE_NODE_TYPE.ESNT_ANY,node_array())
  dim count as integer = 0
  while (node_array(count+1)<>nil)
    count = count+1
  Wend

count is how many nodes there are in the array