Map generation and instancing

[VeTaL]

I noted that i have too little fps on the map with 30-40 wall models, the same number of tower models and 10-20 house models (in summary, about 100 entities).

 

On the other hand, i remember my playing with instancing and also i remember post on this forum with 500K cubes.

 

So, lets see: first, i procedurally generate map, and then i need to generate SBX file by my hands so i would be able to load level in editor or game. So the question is: how engine knows that this object (that is loading now) is instanced or not? I see two ways:

1)

- while saving map into SBX, Editor puts in order models with the same name

- while LoadMap, engine looks at the name of previous entity (because they are already categorized by name) and make CopyEntity if the names are the same

 

2)

- engine just have list of all entities and while it loads new one, it checked by that list, and if entity already exists, it makes CopyEntity, if not - creates new one.

 

So, generated file looking like this:

Model {
path="tower.gmf"
position=35.75,0,35.75
rotation=0,0,0
scale=1,1,1
id=22979576
"class"="Model"
"collisiontype"="2"
"intensity"="1.0000000000000000"
"name"="GeneratedModel_0"
}

Model {
path="wall_large.gmf"
position=30.25,0,35.75
rotation=0,0,0
scale=1,1,1
id=22979576
"class"="Model"
"collisiontype"="2"
"intensity"="1.0000000000000000"
"name"="GeneratedModel_1"
}

Model {
path="tower.gmf"
position=24.75,0,35.75
rotation=0,0,0
scale=1,1,1
id=22979576
"class"="Model"
"collisiontype"="2"
"intensity"="1.0000000000000000"
"name"="GeneratedModel_2"
}

Model {
path="wall_large.gmf"
position=19.25,0,35.75
rotation=0,0,0
scale=1,1,1
id=22979576
"class"="Model"
"collisiontype"="2"
"intensity"="1.0000000000000000"
"name"="GeneratedModel_3"
}

Model {
path="tower.gmf"
position=13.75,0,35.75
rotation=0,0,0
scale=1,1,1
id=22979576
"class"="Model"
"collisiontype"="2"
"intensity"="1.0000000000000000"
"name"="GeneratedModel_4"
}

 

Do i need to group it like "tower", "tower", "tower", "wall", "wall", "wall" for enabling instancing?

[VeTaL]

Okay, just tested:

 

for (int i=0; i<100; i+=1)
{
	for (int j=0; j<100; j+=1)
	{
		// instancing
		cube = CopyEntity(cube);  			

		//// non-instancing
		//cube = CreateCube();

		PositionEntity(cube, Vec3(i*2,0,j*2));

		PaintEntity(cube, mat);
	}
}

CopyEntity() works fast enough

CreateCube() very slooow

LoadModel() also fast