[SOLVED] benefit? when i use referancenode

[wxywxy.ji]

when i use referanceNode what is that i will get benefit?

 

please explain code.

 

other question.

 

only , engine can render Instancing when Node not have inheritMaterial.

 

can engine render Instancing when ReferanceNode have inheritMaterial?

[ulf.schroeter]

NodeReference allows multiple placement of referenced node structure within the world. Changes on referenced node tree will affect all instances in the world (actually NodeReference just "provides" a world transform matrix for instance placement).

 

As far as I know the engine will use instanced rendering when possible even if the referenced node uses inherited materials (but of course you cannot change the per-instance material settings on NodeReference level).

 

In addition multi-threaded updates for NodeReferences can be used by the engine without special requirements for propper node position in world node tree. See this post.

[wxywxy.ji]

engine will use instancing rendering when referenced node uses inherited materials ?

 

in fuction

ObjectSurface *ObjectMesh::render(....)

.....

while(next && counter < num_instances) {

if(type != next->getType()) break;

if(resource != next->getResource()) break;

if(material != next->getMaterial()) break; <= this code [ break ]

if(surface->getSurface() != next->getSurface()) break;

const vec4 *next_transform = next->getWorldTransform();

instance_transforms[0] = next_transform[0];

instance_transforms[1] = next_transform[1];

instance_transforms[2] = next_transform[2];

instance_transforms += 3;

next = next->getNext();

counter++;

}

.....

[wxywxy.ji]

test node

 

<?xml version="1.0" encoding="utf-8"?>

<nodes version="1.14">

<materials>

<library>demos/tropics/tropics.mat</library>

</materials>

<node type="ObjectMesh" id="1953734819" hidden="1" name="palm_coconut_green1">

<mesh>demos/tropics/meshes/palm_coconut_green1.mesh</mesh>

<surface name="palm1_trunk_lod0" decal="0" intersection="0" viewport_mask="3" max_visible_distance="15" material="palm_coconut_trunk" property="surface_base">

<material>

<parameter name="diffuse_color">0.767318 0.49762 0.49762 1</parameter>

</material>

</surface>

<surface name="palm1_leaves_lod0" decal="0" intersection="0" collision="0" viewport_mask="3" max_visible_distance="45" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.891078 0.308792 0.308792 1</parameter>

</material>

</surface>

<surface name="palm1_coconuts_lod1" decal="0" intersection="0" max_visible_distance="1" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.514847 0.0790118 0.0790118 1</parameter>

</material>

</surface>

<surface name="palm1_leaves_lod1" decal="0" intersection="0" collision="0" viewport_mask="3" min_visible_distance="45" max_visible_distance="100" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.960388 0.0570549 0.0570549 1</parameter>

</material>

</surface>

<surface name="palm1_trunk_lod1" decal="0" intersection="0" viewport_mask="3" min_visible_distance="15" material="palm_coconut_trunk" property="surface_base">

<material>

<parameter name="diffuse_color">0.589098 0.469529 0.469529 1</parameter>

</material>

</surface>

<surface name="palm1_coconuts_lod3" decal="0" intersection="0" min_visible_distance="5" max_visible_distance="40" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.410886 0.0569569 0.0569569 1</parameter>

</material>

</surface>

<surface name="palm1_leaves_lod2" decal="0" intersection="0" collision="0" viewport_mask="3" min_visible_distance="100" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.658408 0.528035 0.528035 1</parameter>

</material>

</surface>

<surface name="palm1_coconuts_lod2" decal="0" intersection="0" min_visible_distance="1" max_visible_distance="5" material="palm_coconut_green_leaf" property="surface_base">

<material>

<parameter name="diffuse_color">0.742569 0.510976 0.510976 1</parameter>

</material>

</surface>

<transform>1 -2.08616e-007 -4.91738e-007 0 2.08616e-007 1 1.4901e-008 0 4.99189e-007 0 0.999989 0 0.000213623 0.000152588 2.76566e-005 1</transform>

</node>

</nodes>

[ulf.schroeter]

You are using ObjectMesh with multiple surfaces each having individual materials. In such a case instancing will of course not be possible for the engine as material switching will always break instancing possibilities

 

Instancing should work out-of-the box for ObjectMesh with just a single 1 material (inherited or not). So the key is to use things like texture atlas to avoid material switching (as this will break render batching)

[wxywxy.ji]

reason is inherited or multiple surfaces?

 

engine render instancing when test node have not inherited material.

[ulf.schroeter]

There are multiple possible reasons for breaking node instancing (as you already discovered in the code)

 

if(type != next->getType()) break;
if(resource != next->getResource()) break;
if(material != next->getMaterial()) break; <= this code [ break ]
if(surface->getSurface() != next->getSurface()) break;

 

I don't think it's a question of inherited or non-inherited material, but simply are all surfaces using the SAME material instance.

[wxywxy.ji]

my question is

 

when referencenode (inherited) is loaded or clone , why unigine make new material ( each )?

 

example )

 

in WorldClutter ( referencenode (inherited) )

 

engine not render instancing.

 

can you make reference node material manager?

 

because Anyway reference node is rendered same material.

[manguste]

If I understand your issue correctly, here are our recommendations.

 

If you clone a node (or place a number of nodes via WorldClutter) that has a unique inherited material instance, each of cloned nodes will also have a unique material instance. This way, you can have different materials even on cloned nodes, but no instancing.

 

The idea is:

• If you need to uniquely modify materials for 1-2 nodes, while not modifying all other clones, you can add per-node material instances for these 1-2 nodes.
  
• If you need a big number of nodes with the same material (hence, you need instancing), create a new material in Materials editor and assign it.
  

[wxywxy.ji]

i have made tool that it divide material.

 

each other , surface's material is moved materials.

 

ex )

 

org )

 

<?xml version="1.0" encoding="utf-8"?>

<nodes version="1.09">

<node type="ObjectMesh" id="0" name="PR_EZ_WT_RE_00_00">

<mesh>./PR_EZ_WT_RE_00_00.MESH</mesh>

<surface name="0_AP_EZ_FLAG_01_A" material="theta_bg" property="surface_base" max_fade_distance="298" max_visible_distance="300">

<material>

<texture name="diffuse">AP_EZ_FLAG_01_A.DDS</texture>

<texture name="normal">AP_EZ_FLAG_01_A_NORMAL.DDS</texture>

<texture name="specular">AP_EZ_FLAG_01_A_SPEC.DDS</texture>

</material>

</surface>

<transform>1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 </transform>

</node>

</nodes>

 

change node )

 

 

<?xml version="1.0" encoding="utf-8"?>

<nodes version="1.09">

<materials>

<library>Theta/Props/ET_EZ/Camp/PR_EZ_WT_RE_00_00.mat</library>

</materials>

<node type="ObjectMesh" id="0" name="PR_EZ_WT_RE_00_00">

<mesh>./PR_EZ_WT_RE_00_00.MESH</mesh>

<surface name="0_AP_EZ_FLAG_01_A" material="PR_EZ_WT_RE_00_00_0" property="surface_base" max_fade_distance="298" max_visible_distance="300"/>

<transform>1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 </transform>

</node>

</nodes>

 

thank for reply

[manguste]

Yes, you change a material instance PER NODE, making it unique = no instancing.

 

I can only repeat: If you need a big number of nodes with the same material (hence, you need instancing), do NOT modify per node material instance. Create a new material in Materials editor, and modify it instead.