Difference between revisions of "Material"

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(Code)
(summed stuff up and formatting)
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|
 
|
 
  material
 
  material
   name example_material
+
   name <u>example_material</u>
 
   texture filename
 
   texture filename
 
   addtexture filename
 
   addtexture filename
Line 66: Line 66:
 
   rotation 0
 
   rotation 0
 
   size 10 10 5
 
   size 10 10 5
   matref example_material
+
    
 +
  # refer to the previously defined material with its particular name we gave it before
 +
  # compare underlined text in the code at the [[#Code|page top]]
 +
  '''matref <u>example_material</u>'''
 
  end
 
  end
 
|}
 
|}
 
Please note the ''matref'' is the '''name''' of the defined material, not the name of the .png/url file!
 
Please note the ''matref'' is the '''name''' of the defined material, not the name of the .png/url file!
Note the bolded term next to "name"...
 
{|
 
|
 
material
 
  name '''example_material'''
 
  texture filename
 
  addtexture filename
 
        —etc—
 
|}
 
...is the same as the material listed for "matref"
 
{|
 
|
 
meshbox
 
  position 0 0 10
 
  rotation 0
 
  size 10 10 5
 
  matref '''example_material'''
 
end
 
|}
 
  
 
==Translucency==
 
==Translucency==

Revision as of 15:57, 4 March 2010

A material is used in a BZFlag world to define a new look for otherwise regular objects, such as meshboxes.

Code

To put a material in your map, first it must be defined:

material
 name example_material
 texture filename
 addtexture filename
 notextures
 notexcolor
 notexalpha
 texmat -1
 dyncol -1
 ambient 0.0 0.0 0.0 1.0
 diffuse 1.0 1.0 1.0 1.0
 color 1.0 1.0 1.0 1.0
 specular 0.0 0.0 0.0 1.0
 emission 0.0 0.0 0.0 1.0
 shininess 0.0
 resetmat
 spheremap 
 noradar 
 noshadow
 noculling 
 nosorting 
 nolighting 
 alphathresh 0.0 
 groupalpha
 occluder 
end

Valid parameters for a Material are:

name name for reference
texture set the texture (must be .png but don't include the extension unless on the Internet)
addtexture add a texture (again, no extension is needed)
notextures don't use textures.
notexcolor don't apply the color to the texture
notexalpha don't use the texture's alpha channel
texmat specify a texture matrix. -1 for no texture matrix. (addtexture must be used before texmat)
dyncol specify a dynamic color. -1 for no dynamic color.
ambient ambient color
diffuse diffuse (main)color
color synonym for diffuse
specular specular color
emission emission color
shininess shiny!
resetmat restore default values
spheremap use spherical texture coordinate mapping
noradar do not display on radar (except normal mode)
noshadow do not render shadows
noculling do not cull by face winding (double-sided)
nosorting do not do front-to-back alpha sorting
nolighting disable lighting
alphathresh alpha thresholding value
groupalpha sort translucent faces as a group
occluder faces with this material will occlude

To actually apply a material, you must use some sort of reference in an object, like so:

meshbox
 position 0 0 10
 rotation 0
 size 10 10 5
 
 # refer to the previously defined material with its particular name we gave it before
 # compare underlined text in the code at the page top
 matref example_material
end

Please note the matref is the name of the defined material, not the name of the .png/url file!

Translucency

Material translucency is enabled by setting the alpha component of a material's color to a value less than one. Translucent objects should be sparingly, because everything behind them must always be rendered. In addition, very large translucent objects may be sorted and drawn in the wrong order. This is caused by the fact that the Z-buffer cannot be used because it would allow another translucent object to cover the translucent object, which would not look right. Thus, the translucent elements are instead sorted by determining the distance to a point in the center, which works well as long as there are not too many large translucent objects. The same applies to textures that have translucent sections.

Magic Material Names

General

GroundMaterial
WaterMaterial
LinkMaterial For Teleporter Links
TeleMaterial For Teleporter Frame (BZFlag version 3.0)

Skybox

LeftSkyboxMaterial
RightSkyboxMaterial
FrontSkyboxMaterial
BackSkyboxMaterial
TopSkyboxMaterial
BottomSkyboxMaterial

History

Materials were added in BZFlag 2.0.0.

Editor Support

Materials are supported in Blender with BZWTools, pyBZEdit, and Wings3D with the BZW Exporter for Wings3D. Materials are NOT supported in BZEdit, BZFed or IBZEdit.

A note about textures

A material can be composed of colors and textures. Textures are .png files that are either in the client directory or on the Internet. The terms material and texture are often confused and misunderstood, so bear the above in mind.