Lua OpenGL Api

2009-03-08T17:15:09Z

Gregie156:

== Spring ==
'''gl.GetSun'''
() -> number sunPosX, number sunPosY, number sunPosZ
( "pos" ) -> number sunPosX, number sunPosY, number sunPosZ
( "shadowDensity" [, "unit"] ) -> number shadowDensity
( "diffuse" [, "unit"] ) -> nil | number r, number g, number b
( "ambient" [, "unit"] ) -> nil | number r, number g, number b
( "specular" ) -> nil | number r, number g, number b

'''gl.ConfigScreen'''
( number screenWidth, number screenDistance ) -> nil

'''gl.DrawMiniMap'''
() -> nil

'''gl.SlaveMiniMap'''
( boolean mode ) -> nil

'''gl.ConfigMiniMap'''
( int px, int py, int sx, int sy ) -> nil

'''gl.GetViewSizes'''
( ) -> number x, number y

== Basics ==

'''gl.PushMatrix'''
() -> nil

'''gl.PopMatrix'''
() -> nil

'''gl.Translate'''
(number x, number y, number z) -> nil

'''gl.Scale'''
(number x, number y, number z) -> nil

'''gl.Rotate'''
(number angle, number x, number y, number z) -> nil

'''gl.Color'''
( { number r, number g, number b[, number a] } |
number r, number g, number b[, number a] ) -> nil

'''gl.LineWidth'''
( number width ) -> nil

'''gl.PointSize'''
( number size ) -> nil

'''gl.Billboard''' use this to draw 2d primitives in DrawWorld
() -> nil

'''gl.ResetState'''
() -> nil

ShadeModel = GL_SMOOTH
Scissor = false
Texture = false
ColorMask = true, true, true, true
DepthMask = false
DepthTest = false (GL_LEQUAL)
Culling = false (GL_BACK)
LogicOp = false (GL_INVERT)
AlphaTest = false (GL_GREATER, 0.5f)
Blending = GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA


'''gl.ResetMatrices'''
() -> nil

Resets GL_TEXTURE matrix stack
Resets GL_MODELVIEW matrix stack
Resets GL_PROJECTION matrix stack


'''gl.Clear'''
( GL.DEPTH_BUFFER_BIT [, number cleardepth] ) -> nil
( GL.STENCIL_BUFFER_BIT [, int clearstencil] ) -> nil
( GL.COLOR_BUFFER_BIT | GL.ACCUM_BUFFER_BIT [, number r, number g, number b, number a] ) -> nil

== Draw Basics ==

'''gl.BeginEnd'''
( number [[Lua_ConstGL#Drawing_Primitives|GLType]], function [, arg1,... ] ) -> nil

'''gl.Vertex'''
( { number x, number y [, number z [, number w ]] } |
number x, number y |
number x, number y, number z |
number x, number y, number z, number w ) -> nil

'''gl.Normal'''
( number x, number y, number z |
{ number x, number y, number z } ) -> nil

'''gl.Rect'''
( number x1, number y1, number x2, number y2 ) -> nil

'''gl.TexRect''' texture rect
( number x1, number y1, number x2, number y2,
[ boolean flip_s, boolean flip_t | number s1, number t1, number s2, number t2 ] ) -> nil

'''gl.Shape'''
( number [[Lua_ConstGL#Drawing_Primitives|GLtype]],
elements = {
[1] = { v | vertex = { number x, number y, number z }, required
n | normal = { number x, number y, number z }, optional
t | texcoord = { number x, number y }, optional
c | color = { number r, number g, number b, number a } optional
},
etc ...
}
) -> nil

== Text ==

'''gl.Text'''
(string "text", number x, number y, number size [, string "options"] )

options:
'c' = center
'r' = right
'n' = deactives colorCodes (so you can use gl.Color() to write transparent text etc.)
'o' = black outline
'O' = white outline


'''gl.GetTextWidth'''
(string "text") -> number width -- in pixels, with a font size of 1.0

== Unit/Feature Draw Functions ==

'''gl.Unit''' (draws an unit; on default it uses LOD, with lod<0 it is turned off, else it defines a specific level)
( number unitID, [ boolean rawdraw, int lod ] ) -> nil

'''gl.UnitRaw''' (doesn't apply worldspace->unit transformation! only works if rawdraw is true )
( number unitID, [ boolean rawdraw, int lod ] ) -> nil

'''gl.UnitShape'''
( number unitDefID, number teamID ) -> nil

'''gl.Feature'''
( number featureID ) -> nil

'''gl.FeatureShape'''
( number featureDefID, number teamID ) -> nil

'''gl.UnitMultMatrix''' (world space -> unit space)
( number unitID ) -> nil

'''gl.UnitPieceMultMatrix''' (unit space -> piece space)
( number unitID, int piece ) -> nil

'''gl.UnitPiece''' (draws the unit piece)
( number unitID, int piece ) -> nil

'''gl.UnitPieceMatrix''' (use gl.UnitPieceMultMatrix instead!)
( number unitID, int piece ) -> nil

'''gl.DrawListAtUnit'''
( number unitID, number listID, [ boolean midPos,
number scaleX, number scaleY, number scaleZ,
number degrees, number rotX, number rotX, number rotZ ] ) -> nil

'''gl.DrawFuncAtUnit'''
( number unitID, boolean midPos, function [, arg1,... ]) -> nil

== Switches ==

'''gl.Blending'''
( boolean enable | number [[Lua_ConstGL#BlendingFactorSrc|srcmode]], number [[Lua_ConstGL#BlendingFactorDest|dstmode]] ) -> nil

'''gl.AlphaTest'''
( boolean enable | number [[Lua_ConstGL#AlphaFunction and DepthFunction|func]], number threshold ) -> nil

'''gl.DepthTest'''
( boolean enable | number [[Lua_ConstGL#AlphaFunction and DepthFunction|func]] ) -> nil

'''gl.Culling'''
( boolean enable | number [[Lua_ConstGL#Culling|face]] ) -> nil

'''gl.DepthMask'''
( boolean enable ) -> nil

'''gl.ColorMask'''
( boolean ) -> nil
( boolean r, boolean g, boolean b, boolean a ) -> nil

'''gl.LogicOp'''
( boolean enable | number [[Lua_ConstGL#LogicOp|func]] ) -> nil

'''gl.Fog'''
( boolean enable ) -> nil

'''gl.Smoothing'''
( (boolean enable | number POINT),
(boolean enable | number LINE),
(boolean enable | number POLYGON) ) -> nil

'''gl.EdgeFlag'''
( boolean enable ) -> nil

'''gl.Scissor'''
( boolean ) -> nil
( int x, int y, int w, int h ) -> nil

'''gl.LineStipple'''
( string any ) -> nil (use springs default line stipple)
( boolean enable ) -> nil
( int factor, number pattern ) -> nil

'''gl.PolygonMode'''
( number [[Lua_ConstGL#Culling|face]], number [[Lua_ConstGL#PolygonMode|mode]] ) -> nil

'''gl.PolygonOffset'''
( boolean enable | number factor, number units ) -> nil

== Textures ==

'''gl.Texture'''
( [ number texNum, ] boolean enable | string name ) -> nil | boolean loaded

current formats:
:${opt}:/LuaUI/images/image.png = filename
#12 = unitDef 12 buildpic
%34:1 = unitDef 34 s3o tex2 (:0->tex1,:1->tex2)
!56 = lua generated texture 56
$units = 3do textureatlas
$shadow = shadowmap
$specular = specular cube map
$reflection = reflection cube map

possible ${opt}'s are:
'n' = nearest
'l' = linear
'a' = aniso
'i' = invert
'g' = greyed
'c' = clamped
'b' = border
't%r,%g,%b' = tint

example: ":iac:/LuaUI/images/image.png"
example2: ":t1.0,0.5,0:/LuaUI/images/image.png" (orange tint)


'''gl.CreateTexture'''
( int xsize, int ysize,
[ {
[target = number,] (like GL_TEXTURE_1D,GL_TEXTURE_2D,...)
[format = number,]
[min_filter = [[Lua_ConstGL#Texture_Filtering|number]],]
[mag_filter = [[Lua_ConstGL#Texture_Filtering|number]],]
[wrap_s = [[Lua_ConstGL#Texture_Clamping|number]],]
[wrap_t = [[Lua_ConstGL#Texture_Clamping|number]],]
[wrap_r = [[Lua_ConstGL#Texture_Clamping|number]],]
[aniso = number,]
[border = boolean,]
[fbo = boolean,] (needs GLEW_EXT_framebuffer_object!)
[fboDepth = boolean] (needs GLEW_EXT_framebuffer_object!)
} ]
) -> string

'''gl.DeleteTexture'''
( string texture ) -> boolean

'''gl.DeleteTextureFBO''' (needs GLEW_EXT_framebuffer_object!)
( string texture ) -> boolean

'''gl.TextureInfo'''
( string texture ) -> nil | {
xsize = number,
ysize = number,
alpha = boolean, //not used yet
type = number, //not used yet
}

the format of the texture string is the same as in gl.Texture()


'''gl.TexCoord'''
( number x |
number x, number y |
number x, number y, number z |
number x, number y, number z, number w |
{ number x [, number y [, number z [, number w ]]] } ) -> nil

'''gl.MultiTexCoord'''
( int texNum,
number x |
number x, number y |
number x, number y, number z |
number x, number y, number z, number w |
{ number x [, number y [, number z [, number w ]]] } ) -> nil

'''gl.TexEnv'''
( number [[Lua_ConstGL#Texture_Environment|target]], number [[Lua_ConstGL#Texture_Environment|pname]],
number [[Lua_ConstGL#Texture_Environment|value]] |
number var1, number var2, number var3 ) -> nil

'''gl.MultiTexEnv'''
( int texNum, number [[Lua_ConstGL#Texture_Environment|target]], number [[Lua_ConstGL#Texture_Environment|pname]],
number [[Lua_ConstGL#Texture_Environment|value]] |
number var1, number var2, number var3 ) -> nil

'''gl.TexGen'''
( number [[Lua_ConstGL#Texture_Generation|target]],
boolean state |
number [[Lua_ConstGL#Texture_Generation|pname]], number value |
number [[Lua_ConstGL#Texture_Generation|pname]], number var1, number var2, number var3 ) -> nil

'''gl.MultiTexGen'''
( int texNum, number [[Lua_ConstGL#Texture_Generation|target]],
boolean state |
number [[Lua_ConstGL#Texture_Generation|pname]], number value |
number [[Lua_ConstGL#Texture_Generation|pname]], number var1, number var2, number var3 ) -> nil

'''gl.CopyToTexture'''
(string texture, int xoff, int yoff, int x, int y, int w, int h
[,number target,number level])->nil

'''gl.RenderToTexture''' (needs GLEW_EXT_framebuffer_object!)
( string fbotexture, lua_func ) -> nil

'''gl.GenerateMipmap''' (needs glGenerateMipmapEXT!)
( string texture ) -> boolean

== Lights ==

'''gl.Lighting'''
( boolean enable ) -> nil

'''gl.ShadeModel'''
( number [[Lua_ConstGL#ShadeModel|mode]] ) -> nil

'''gl.Light'''
( int light,
boolean enable |
number [[Lua_ConstGL#Light_Specification|pname]], number param |
number [[Lua_ConstGL#Light_Specification|pname]], number param1, number param2, number param3 ) -> nil

'''gl.Material'''
({
ambient = {number r, number g, number b[, number a]},
diffuse = {number r, number g, number b[, number a]},
ambidiff = {number r, number g, number b[, number a]},
emission = {number r, number g, number b[, number a]},
specular = {number r, number g, number b[, number a]},
shininess = number specularExponent
}) -> nil

== Display Lists ==
Display Lists save given vertex attributes in a static buffer, so the GPU can directly read them (without the CPU). Display Lists are a lot faster (10-60x) than standard drawing with glShape/glBeginEnd, so try to use them when ever you can. If you want to learn more about them, g00gle is your friend ;)

'''gl.CreateList'''
( function [,arg1 [,arg2...]] ) -> int
returns the listID

'''gl.CallList'''
( number listID ) -> nil

'''gl.DeleteList'''
( number listID ) -> nil

== Hardware relevant ==

'''gl.HasExtension'''
( string extname ) -> boolean

'''gl.GetNumber'''
( number ext, int count ) -> number [, number, number, ... #count ]

'''gl.GetString'''
( number ext ) -> string

== DrawGroundPrimitives ==

'''gl.DrawGroundCircle'''
( number x, number y, number z, number radius, number divs [, number slope ] ) -> nil
Note: number divs is the number of sides the circle will have. the higher the smoother the circle (and more GPU intensive) 

'''gl.DrawGroundQuad''' Note: x1,z1,x2 & z2 are rounded, so don't use it for very small or moving objects. x and z are correspond to the coordinates displayed by the tooltip 
( number x1, number z1, number x2, number z2,
[ boolean useNorm,
[ number tu1, number tv1, number tu2, number tv2 |
boolean useTextureCoord ] ] ) -> nil

== Extended ==

'''gl.ActiveTexture'''
( int texNum, function [, arg1,... ] ) -> nil

'''gl.GetGlobalTexNames'''
() -> { [1] = string texture, etc ... }

'''gl.GetGlobalTexCoords'''
( string tatexture ) -> number xstart, number ystart, number xend, number yend

'''gl.GetShadowMapParams'''
() -> number xmid, number ymid, number p17, number p18

'''gl.GetMatrixData'''
( GL.PROJECTION [, int i] ) -> nil | number, etc.. | number Matrix[i]
( GL.MODELVIEW [, int i] ) -> nil | number, etc.. | number Matrix[i]
( GL.TEXTURE [, int i] ) -> nil | number, etc.. | number Matrix[i]
( "shadow" ) -> nil | number, etc..
( "camera" ) -> nil | number, etc..
( "caminv" ) -> nil | number, etc..
( "camprj" ) -> nil | number, etc..
( "billboard" ) -> nil | number, etc..

'''gl.PointSprite''' (needs openGL2.0!)
( boolean enable, [boolean coord_replace, boolean coord_origin_upper] ) -> nil

'''gl.PointParameter''' (needs openGL2.0!)
( number v1, number v2, number v3,
[ number sizeMin, number sizeMax, number sizeFade ] ) -> nil

'''gl.SecondaryColor'''
( { number r, number g, number b } |
number r, number g, number b ) -> nil

'''gl.FogCoord'''
( number value ) -> nil

'''gl.ClipPlane'''
( int plane, note: $plane can only be 1 or 2
boolean enable |
number A, number B, number C, number D ) -> nil

'''gl.MatrixMode'''
( number [[Lua_ConstGL#MatrixMode|mode]] ) -> nil

'''gl.LoadIdentity'''
() -> nil

'''gl.LoadMatrix'''
() -> nil

'''gl.MultMatrix'''

'''gl.Ortho'''
( number left, number right, number bottom, number top, number near, number far ) -> nil

'''gl.Frustum'''
( number left, number right, number bottom, number top, number near, number far ) -> nil

'''gl.PushPopMatrix'''

'''gl.PushAttrib'''
( [ number [[Lua_ConstGL#glPushAttrib.28.29_bits|attrib]] ] ) -> nil

'''gl.PopAttrib'''
() -> nil

'''gl.Flush'''
() -> nil

'''gl.Finish'''
() -> nil

== Shaders (GLSL) ==
[[Lua_GLSL_Api]]

Spring - User contributions [en]

Lua OpenGL Api