Project a Texture

[tjheldna]

Hi all,

 

Does anyone have any advice on how to project a texture in the scene? I can see many uses for this in my project, but mainly I need to project a circle at the players feet at various radius's. Can this be done with some sort of light that projects a texture? I just don't know where to begin with this so any help would be appreciated!!

[Road Kill Kenny]

To project a texture you paint a light with a TTexture. i.e LE::PaintEntity(light, texture)

 

In my game I simply have a texture with alpha. I parent that to the characters mesh and it seems to work pretty well.

 

There are decals but they have some performance issues atm and I think a light projection would also be an unnecessary performance hit as well.

 

[Roland]

Most interesting ... didn't know about that trick.

Thanks for that

[Road Kill Kenny]

To project a texture you paint a light with a TTexture. i.e LE::PaintEntity(light, texture)

 

In my game I simply have a texture with alpha. I parent that to the characters mesh and it seems to work pretty well.

 

There are decals but they have some performance issues atm and I think a light projection would also be an unnecessary performance hit as well.

 

 

The only problem with my texture with alpha is when I put slopes into my game it will look wrong so I'll have to find some work around for that I guess lol

[Rick]

I know for terrain slopes I create a plane that has many segments that I paint the texture on and then I loop through each vertex location and get the height of the terrain directly below that x,z and move the vertex y like .001 above the terrain height. Performance is a balance between how many segments the plane has which comes down to how hilly your terrain is to give a nice look. Could probably do the same for models if you can get the y value of the x,z position on a model.

 

 

[AggrorJorn]

or the lua variant:

http://www.leadwerks.com/werkspace/files/file/173-projector-light/

[Road Kill Kenny]

I know for terrain slopes I create a plane that has many segments that I paint the texture on and then I loop through each vertex location and get the height of the terrain directly below that x,z and move the vertex y like .001 above the terrain height. Performance is a balance between how many segments the plane has which comes down to how hilly your terrain is to give a nice look. Could probably do the same for models if you can get the y value of the x,z position on a model.

 

If the performance hit is smaller than the current decal system then why not

[ChrisMAN]

I know for terrain slopes I create a plane that has many segments that I paint the texture on and then I loop through each vertex location and get the height of the terrain directly below that x,z and move the vertex y like .001 above the terrain height. Performance is a balance between how many segments the plane has which comes down to how hilly your terrain is to give a nice look. Could probably do the same for models if you can get the y value of the x,z position on a model.

 

 

How do you find the terrain height directly below each vertex?

[Rick]

http://www.leadwerks.com/werkspace/page/Documentation/le2/_/command-reference/terrain/terrainheight-r414