[Getting started with Lua script]

I updated the file. It's 21 pages now and growing. So far it covers all aspects of scripting, and next I will write about integrating Lua with other languages.

[Getting started with Lua script]

I am adding to this lesson. It's getting quite long, and talks about all aspects of the engine and Lua.

[Roads in code]

If you just loaded a model and set the target it would actually work automagically.

[A few thoughts after playing Oblivion]

I think by "procedural" they probably mean they have a series of connected nodes the artist places, and the engine builds a mesh at runtime, sort of like how ours work.

[Road bug fixed]

Let me know if you find any other problems. I am going through the scripts looking for any errors.

 

This is a good practical lesson in the importance of consistency. B)

[2.3 Sync]

This should work to set globals in the Lua virtual machine:

Function SetScriptObject(name:String,o:Object)
Local size:Int=GetStackSize()
lua_pushbmaxobject(luastate.L,o)
lua_setglobal(luastate.L,name)
SetStackSize(size)
EndFunction

Function GetStackSize:Int()
Return lua_gettop(luastate.L)
EndFunction

Function SetStackSize(size:Int)
Local currentsize:Int=GetStackSize()
If size<currentsize
	lua_pop(luastate.L,currentsize-size)
EndIf
EndFunction

[FreeEntity() crashes editor?]

It may be invisible, but it will still be stored in memory and in the lua object table. The class will never get freed either.

[FreeEntity() crashes editor?]

I usually like to have a lot of extra checks:

function class:CreateObject(model)

local object=self.super:CreateObject(model)
object.cube=CreateCube()

function object:Free()
	if self.cube~=nil then
			self.cube:Free()
			self.cube=nil
	end
	self.super:Free()
end

end

 

Don't forget self.super:Free()!

[Road bug fixed]

Yes, just apply a different material.

 

I fixed the math function name thing. It's in the sync folder.

[Own SBX Loader]

Nope. The terrain shader doesn't use a matrix multiplication, for better speed.

[Why does the road go like this?]

Turn on trilinear filtering and set anistropic filtering to 4.0.

[Terrain Grid Points]

You can do quite a bit to the 2.3 editor with scripts.

[Terrain Grid Points]

That looks familiar.

[Transparency and Refraction lesson updated]

I added a vcproject to the Transparency and Refraction lesson. I'm going to include a project with each lesson showing the final result.

 

Unfortunately, the Windows 64-bit Program Files convention interferes with this, because the project doesn't know if the header files are in C:\Program Files\Leadwerks Engine SDK or C:\Program Files (x86)\Leadwerks Engine SDK. I am going to make these projects with the header in C:\Leadwerks Engine SDK, and the default installation directory will be moved there as well.

[Terrain texture fill opacity]

The floor/ceiling sliders can be used to control the opacity.

[Performance boost and multithreading]

There are still a few things I can do to improve performance with points lights especially. Multithreading won't actually make that much of a difference, because most of the bottlenecks occur on the GPU.

[2.3 Demo]

Within one month.

[Terrain Grid Points]

TerrainHeight will return the height at a specific grid point. Terrain elevation will return an interpolated height at a 3D position in global coordinates.

[Road bug fixed]

http://leadwerks.com/werkspace/index.php?/tracker/issue-25-road-position/

[lightimg problem]

The issue is resolved. Sync.

[Can't see the scene?]

Your first code you posted worked perfectly.

[Custom Object not calling Create/Free correctly]

function object:Free() (no parameters)

[base lua file proposal for Josh]

If you add require("scripts/loop") at the top, you will import the loop script, which has a few functions declared the engine picks up:

 

require("Scripts/hooks")

function UpdateWorldHook()
RunHooks("UpdateWorld")
end

function UpdatePhysicsHook()
RunHooks("UpdatePhysics")
end

function FlipHook()
RunHooks("Flip")
end

 

I just added the FlipHook() function, so I guess it doesn't make sense to call this file "loop" anymore. Maybe "enginehooks" would be a better file name?

 

Then the user can use AddHook("UpdateWorld",myfunction) to add their own Lua hooks, and your main loop doesn't have to have any code hardly.

[2.3 Sync]

You could but the results would be unpredictable because SetMatrix() updates the entity position, rotation, scale, etc.

 

Here is a list of members:

http://leadwerks.com...ntities#Members

 

The following are the documented members of the Entity class. Generally, members should be treated as read-only. For example, setting the entity position by changing the position vector values will fail to perform necessary updates the SetPosition() command would call, and the results may be unpredictable.

[Waterplane reflections.]

Me.