jit.gl.bfg

Procedural basis function texture generator

Description

Generates OpenGL texture output from a library of procedural basis functions. The functions are processed on the graphics card as OpenGL GLSL shaders. The three categories of functions include noise, fractal and distorted.

Attributes

adapt [int] (default: 1)

Enable adapt to input (default = 1). When enabled the texture output dimensions will match the input dimensions.

basis [symbol]

The name of the basis function to use for the evaluation. (default = noise.perlin)

Possible values:

'noise.perlin' ( Classic Perlin noise, periodic variant )
'noise.simplex' ( Simplex weighted pseudo-random values )
'noise.cell' ( Coherent blocky noise )
'noise.checker' ( Periodic checker squares )
'fractal.multi.rigid' ( Multiplicative fractal with sharp ridges )
'fractal.multi.hybrid' ( A hybrid additive and multiplicative fractal )
'fractal.fbm' ( Fractal Brownian motion )
'fractal.multi' ( Multiplicative fractal with varying simularity across scales )
'fractal.hetero' ( Heterogenous multiplicative fractal )
'noise.voronoi' ( Distance weighted pseudo-random feature points )
'noise.voronoi.crackle' ( Variation of Voronoi )
'noise.voronoi.smooth' ( Variation of Voronoi with distance filtering )
'noise.voronoise' ( Generalized Voronoi and Noise )
'noise.voronoi.id' ( Voronoi variation with cells colorized by ID )
'distorted' ( Domain distorted combinational noise )
'distorted.2axis' ( Distortion along 2 axes )
'input.distorted' ( Distortion of input texture )
'input.distorted.2axis' ( Distortion of input texture along 2 axes )

basis.inner [symbol]

Set the innter basis function when basis is a distorted type function (default = noise.perlin).

Possible values:

'noise.perlin'
'noise.simplex'
'noise.cell'
'noise.checker'
'fractal.multi.rigid'
'fractal.multi.hybrid'
'fractal.fbm'
'fractal.multi'
'fractal.hetero'
'noise.voronoi'
'noise.voronoi.crackle'
'noise.voronoi.smooth'
'noise.voronoise'
'noise.voronoi.id'

basis.outer [symbol]

Set the outer basis function when basis is a distorted type function (default = noise.simplex).

Possible values:

'noise.perlin'
'noise.simplex'
'noise.cell'
'noise.checker'
'fractal.multi.rigid'
'fractal.multi.hybrid'
'fractal.fbm'
'fractal.multi'
'fractal.hetero'
'noise.voronoi'
'noise.voronoi.crackle'
'noise.voronoi.smooth'
'noise.voronoise'
'noise.voronoi.id'

colorize [int]

Colorize the output texture using a cosine function (default = 0). See the palette attribute for making adjustments to the colorization.

dim [2 ints]

The texture output dimensions when adapt is disabled (default = 256 256)

dimscale [2 floats]

The output dimension scaling factor of the output (default = 1 1). Useful for upsampling or downsampling texture output.
output.dim = input.dim*dimscale

distortion [float]

Adjust the amount of distortion for distorted type functions (default = 1).

fractal_params [4 floats]

Adjust parameters of fractal type functions. The parameters correspond to h, lacunarity, offset, and gain. Not all fracal functions respond to all parameters. Unused paramters are set to 0.
fractal.multi.rigid uses h, lacunarity, offset, gain
fractal.multi, fractal.hetero and fractal.multi.hybrid uses h, lacunarity, offset
fractal.fbm uses h, lacunarity

offset [2 floats]

The dimensional offsets to use for generating the spatial grid coordinates (default = 0 0).

out_name [symbol]

g/s(get)

Output texture name

palette [3 floats]

Adjust the colorization effect when colorize is enabled (default = 0 1 2).

rect [4 floats]

Slab geometry rectangle (default = 0 0 1 1). The four values represent normalized coordinates for the left, bottom, right and top sides of the geometry rectangle. To flip the image horizontally use rect 1 0 0 1 or to flip vertically use rect 0 1 1 0 .

rectangle [int]

Enable texture rectangle mode on internal texture objects(default = 1). When enabled the internal GL texture is treated as a rectangular texture, and must be referenced using sampler2DRect and sampled using texture2DRect when sampled from a GLSL shader. When disabled the texture dimensions are upsampled to the nearest power of two value, and must be referenced and sampled using sampler2D and texture2D. Certain texture attributes and GLSL effects require rectangle mode disabled.

scale [2 floats]

The dimensional scale factors to use for generating the spatial grid coordinates (default = 1 1).

texrect [128 floats]

Texture rectangle mapping values (default = 0 0 1 1...). The four values represent texture mapping coordinates for the left, bottom, right and top sides of the geometry rectangle, and can be used to easily crop the input image. There are four values for each texture input.

time [float]

Time animation parameter

type [symbol]

The output texture data type (default = auto). When type is auto the type is set by the input texture or matrix type.

Possible values:

'auto' ( Adapt to input data type )
'char' ( 8bit unsigned byte )
'long' ( 32bit integer )
'half' ( 16bit float )
'float' ( 32bit float )
'float16' ( 16bit float )
'float32' ( 32bit float )

voronoi_crackle [3 floats]

Voronoi crackle effect values (default = 8.0 2.0 0.5). Only used when basis is noise.voronoi.crackle

voronoi_jitter [float]

Voronoi jitter amount (default = 1). Only used when basis is a noise.voronoi type function.

voronoi_shade [float]

Simulate cell shading effect when basis is noise.voronoi.id (default = 0.5).

voronoi_smooth [float]

Adjust the smoothing factor when basis is noise.voronoi.smooth (default = 64).

voronoise_amt [float]

Adjust the mix between the Voronoi and noise functions when basis is noise.voronoise (default = 0).

zoom [float]

Adjust both the scale and offset values to simulate zooming in and out of the function center (default = 1).

Common Box Attributes

annotation [symbol]

Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.

background [int] (default: 0)

Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.

color [4 floats]

Sets the color for the object box outline.

fontface [int]

Sets the type style used by the object. The options are:

plain
bold
italic
bold italic

Possible values:

0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'

fontname [symbol]

Sets the object's font.

fontsize [float]

Sets the object's font size (in points).

Possible values:

'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'

hidden [int] (default: 0)

Toggles whether an object is hidden when the patcher is locked.

hint [symbol]

Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.

ignoreclick [int] (default: 0)

Toggles whether an object ignores mouse clicks in a locked patcher.

patching_rect [4 floats] (default: 0. 0. 100. 0.)

Sets the position and size of the object in the patcher window.

position [2 floats]

g/s(set)

Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.

presentation [int] (default: 0)

Sets whether an object belongs to the patcher's presentation.

presentation_rect [4 floats] (default: 0. 0. 0. 0.)

Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.

rect [4 floats]

g/s(set)

Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).

size [2 floats]

g/s(set)

Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.

textcolor [float]

Sets the color for the object's text in RGBA format.

textjustification [int]

Text Justification

Possible values:

0 = 'left'
1 = 'center'
2 = 'right'

varname [symbol]

Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.

OB3D Attributes

anim [symbol]

The name of a jit.anim.node object that handles all spatial transforms for this instance (default = UID). The default value references an internal object, but can be overridden by setting to the name of an existing external jit.anim.node instance. This allows for more advanced control of the spatial transform.

anchor [3 floats]

The anchor position in local space (default = 0. 0. 0.). Allows for offsetting the local 3D origin around which transforms are applied.

animmode [symbol]

Determines which space the anim_move and anim_turn messages will affect the position and orientation of this object (default = parent).
local = Rotate relative to local axis
parent = Rotate relative to parent axis
world = Rotate relative to world axis

antialias [int]

Antialiasing flag (default = 0) On some hardware, the blend_enable attribute must also be enabled for antialiasing to work.

automatic [int]

Automatic rendering flag (default = 1) When the flag is set, rendering occurs when the associated jit.gl.render object receives a bang message

auto_material [int]

Automatic material attributes flag (default = 1) When the flag is set, and lighting is enabled for the object, the diffuse and ambient material components for the object will be set to the object's color, and the specular and emissive lighting components are disabled.

aux_color [4 floats]

The auxiliary color in the form red green blue alpha (default = 0. 0. 0. 0.) The list elements should be in the range 0.-1.

axes [int]

x/y/z axis rendering off/on (default = 0)

blend [symbol]

The named blending mode. The possible values are:
add = blend_mode 1 1
multiply = blend_mode 2 1
screen = blend_mode 4 1
exclusion = blend_mode 4 5
colorblend = blend_mode 3 4
alphablend = blend_mode 6 7
coloradd = blend_mode 3 1
alphaadd = blend_mode 6 1

blend_enable [int]

Blending flag (default = 0) When the flag is set, blending is enabled for all rendered objects.

blend_mode [2 ints]

The source and destination planes associated with the blend mode (default = 6 7) Blend modes are specified in the form src_blend_mode dst_blend_mode. The supported modes are:
0 = zero
1 = one
2 = destination color
3 = source color
4 = one minus destination color
5 = one minus source color
6 = source alpha
7 = one minus source alpha
8 = destination alpha
9 = one minus destination alpha
10 = source alpha saturate

camera [3 floats]

The camera position in 3D space (default = 0. 0. 2.) Camera position is specified as a set of floating point numbers that correspond to a camera position with respect to the x, y, and z axes.

capture [symbol]

The name of a texture to be rendered to - e.g. jit.gl.nurbs @capture mytex will capture to jit.gl.texture @name mytex.

color [4 floats]

The draw color in the form red green blue alpha (default = 1. 1. 1. 1.) The list elements should be in the range 0.-1.

cull_face [int]

Face culling mode (default = 0 (no culling))
0 = no culling
1 = cull back faces
2 = cull front faces

depth_clear [int]

Depth buffer clear flag (default = 0) When the flag is set, the depth buffer is cleared before rendering the object.

depth_enable [int]

Depth buffering flag (default = 1) When the flag is set, depth buffering is enabled.

depth_write [int]

Depth write flag (default = 1). When the flag is set, writing to the depth buffer is enabled. This will have no effect if depth_enable is turned off.

dest_dim [2 ints]

Destination dimensions width height (default = jit.gl.render destination dimensions)

drawto [symbol]

The named drawing context in which to draw (default = none) A named drawing context is a named instance of a jit.window, jit.pwindow, or jit.matrix object that has an instance of the jit.gl.render object associated with it.

enable [int]

Enable flag (default = 1) When the flag is set, drawing is enabled.

filterclass [symbol]

The name of this object's pick filter class (default = default). This controls the visibility of objects to the jit.gl.handle and jit.gl.picker objects. In order to select this object, the filterclass value must be in the picking object's filters list.

far_clip [float]

The far clipping plane distance in 3D world (default = 100.)

fog_params [7 floats]

The fog parameters in the form red green blue alpha density start end (default = 0. 0. 0. 0. 0. 0. 0.) The list's color elements should be in the range 0.-1.

fog [float]

The amount of fog effect (default = 0.)

layer [int]

Object layer number (default = 0) When in automatic mode, the layer number determines the rendering order (low to high). Objects in the same layer have no guarantee which will be rendered first.

lens_angle [float]

The lens angle of the OpenGL camera (default = 45.)

lighting_enable [int]

Lighting enabled flag (default = 0) When the flag is set, lighting is calculated.

light_ambient [4 floats]

The color and opacity of the ambient light component in the form red green blue opacity (default = 0. 0. 0. 1. (opaque black)) All values should be in the range 0.-1.

light_diffuse [4 floats]

The color and opacity of the diffuse light component in the form red green blue opacity (default = 1. 1. 1. 1. (opaque white)) All values should be in the range 0.-1.

light_global_ambient [4 floats]

The color and opacity of the global ambient light component in the form red green blue opacity (default = 0.2 0.2 0.2 1.) All values should be in the range 0.-1.

light_position [4 floats]

The position of the light source in XYZ coordinates and the light type (default = 1. 1. 1. 0.)
When the last number is 0., t The light is treated as a directional source if 0. is the final number. Otherwise, diffuse and specular lighting calculations are based on the actual location of the light in eye coordinates, and attenuation is enabled.

light_specular [4 floats]

Color and opacity of specular light component (default = 1. 1. 1. 1. (opaque white)) The first three floats in the range 0.-1. specify the RGB components of the specular light color. The fourth float (also in the range 0.-1.) specifies opacity.

line_width [float]

The drawing line width (default = 1.)

lookat [3 floats]

3D position at which the camera is pointed (default = 0. 0. 0.)

mat_ambient [4 floats]

The ambient light material property in the form red green blue alpha (default = 0. 0. 0. 0.) The list elements should be in the range 0.-1.

mat_diffuse [4 floats]

The diffuse light material property in the form red green blue alpha (default = 0. 0. 0. 0.) The list elements should be in the range 0.-1.

mat_emission [4 floats]

The material emission property in the form red green blue alpha (default = 0. 0. 0. 0.) The list elements should be in the range 0.-1.

mat_specular [4 floats]

The specular light material property in the form red green blue alpha (default = 0. 0. 0. 0.) The list elements should be in the range 0.-1.

matfile [symbol]

The Jitter material file to apply (.jitmtl)

matrixoutput [int]

Matrix output mode (default = 0)
0 = issue render commands
1 = output geometry matrices
2 = output geometry matrices with local transform applied

name [symbol]

The instance name (default = UID)

near_clip [float]

The near clipping plane distance in 3D world (default = 0.1)

ortho [int]

Orthographic projection mode (default = 0)
0 = orthographic projection off (perspective projection)
1 = orthographic projection on, using lens angle
2 = orthographic projection on, ignoring lens angle

point_size [float]

The draw point size (default = 1.)

poly_mode [2 ints]

Polygon rendering modes (default 0 0) Rendering modes are expressed in the form frontface backface. Supported rendering modes are:
0 = render as filled polygons
1 = render as lines
2 = render as points

position [3 floats]

The 3D origin in the form x y z (default = 0. 0. 0.)

quat [4 floats]

The current rotation as a quaternion(default = 0. 0. 0. 1.). A quaternion is a mathematical construct that is a four dimensional vector, and can be visualized as a rotation around an arbitrary axis. Quaternions are a useful representation of an orientation in 3D space.

rotate [4 floats]

The angle of rotation and the xyz vector about which the rotation is performed in the form rotation-angle x y z (default = 0. 0. 0. 1.)

rotatexyz [3 floats]

Sets the current rotation to the concatenation of rotations about the positive x, y, and z axes, also known as Euler angles (default = 0. 0. 0.). The default order is yzx and can be changed with the jit.gl.render rotate_order attribute. Angles are expressed in degrees.

scale [3 floats]

The 3D scaling factor in the form x y z (default = 1. 1. 1.)

shadow_caster [int]

Shadow caster flag (default = 0) When the flag is set, object will cast shadows.

shininess [float]

The material shininess value (default = 16.0) The value should be a float in the range 0.-255.

smooth_shading [int]

Smooth shading flag (default = 0) When the flag is set, smooth shading is used when rendering.

tex_map [int]

Mode for automatic generation of texture coordinate controls (default = 0)
0 = no coordinates are generated.
1 = OpenGL's texture generation is used with mode GL_OBJECT_LINEAR. This applies the texture in a fixed orientation relative to the object.
2 = OpenGL's texture generation is used with mode GL_SPHERE_MAP. This can be used to create a reflection effect.
3 = OpenGL's texture generation is used with mode GL_EYE_LINEAR. This applies the texture in a fixed orientation relative to OpenGL's eye coordinates.
Modes 1 and 3 are affected by the value of the tex_plane_s and tex_plane_t attributes listed below.

tex_plane_s [4 floats]

The texture generation coefficients a b c d that apply to tex_map modes 1 and 3. (default = 1. 0. 0. 0.)
The four coefficients define a plane used to generate the s texture coordinate, which corresponds to the x axis of the texture image. If the tex_map mode is 1, s = ax + by + cz + dw, where x, y, z, and w are the homogeneous coordinates of the vertex.

tex_plane_t [4 floats]

The texture generation coefficients a b c d, which apply to tex_map modes 1 and 3. (default = 0. 1. 0. 0)
The four coefficients define a plane which is used to generate the t texture coordinate, which corresponds to the y axis of the texture image.

shader [symbol]

The name of the shader to be applied (default = none)

texture [8 symbols]

The name of the texture to be applied (default = none). If multiple textures are specified, uses multi-texturing.

transform_reset [int]

Modelview and projection transform reset flag (default = 0) When the flag is set, the modelview and projection transforms are set to the identity transform before rendering the object. This is useful for sprite or billboard overlays, or automatic scaling to window size. The transform_reset flag modes are:
0 = do nothing (default)
1 = proportional orthographic glOrtho(-aspect, aspect, -1.0, 1.0, near_clip, far_clip);
2 = orthographic normalized glOrtho(-1.0, 1.0, -1.0, 1.0, near_clip, far_clip);
3 = proportional perspective with near clip = 0.001 gluPerspective(lens_angle, aspect, 0.001/*near_clip*/, far_clip);
4 = normalized perspective with near clip = 0.001 gluPerspective(lens_angle, 1.0, 0.001/*near_clip*/, far_clip);

up [3 floats]

The 3D vector towards which the top of the camera points (default = 0. 1. 0.)

verbose [int]

Toggles printing messages to the Max Console.

viewalign [int]

View aligned transformation flag (default = 0)

Messages

full_source_code

Open an editor window containing the generated JXS shader code based on object state.

getparamdefault

Arguments

name [symbol]
Report shader parameter's default value

getparamdescription

Arguments

name [symbol]
Get a parameter description

getparamlist

Report shader parameter names

getparamtype

Arguments

name [symbol]
Report shader parameter's type

getparamval

Arguments

name [symbol]
Report shader parameter's value

param

Arguments

name [symbol]
message [symbol]
values [list]
Set a shader parameter value

sendinput

Arguments

index [int]
message [symbol]
values [list]
Sends an input jit.gl.texture object a message.

sendoutput

Arguments

message [symbol]
values [list]
Sends the output jit.gl.texture object a message.

sendshader

Arguments

message [symbol]
values [list]
Sends the internal jit.gl.shader object a message

OB3D Messages

bang

Equivalent to the draw message.

draw

Draws the object in the named drawing destination. If the matrixoutput attribute is supported and set to 1, the geometry matrices are sent out the object's left outlet.

drawraw

Equivalent to draw with the inherit_all attribute set to 1.

drawimmediate

Equivalent to draw but ignoring any potential renderer setup

anim_move

Arguments

x [float]
y [float]
z [float]
Move the object along the axis provided, relative to the space indicated by animmode.

anim_turn

Arguments

x [float]
y [float]
z [float]
Rotate the object along each axis by the amount provided, relative to the space indicated by animmode.

anim_grow

Arguments

x [float]
y [float]
z [float]
Scale the object along each axis by the amount provided.

anim_reset

Reset the local transformation attributes to their default values (position = 0 0 0, rotatexyz = 0 0 0, and scale = 1 1 1)

update_node

Update the node transformation attributes.

import_material

Import a Jitter material file (.jitmtl).

export_material

Export material state as a material file (.jitmtl).

See Also

Name Description
jit.bfg Evaluate a procedural basis function graph
jit.gl.pix Generates pixel processing shaders from a gen patcher
jit.gl.shader Manage a GL shader
jit.gl.slab Process texture data
jit.gl.texture Create OpenGL textures
Tutorial 42: Slab: Data Processing on the GPU Tutorial 42: Slab: Data Processing on the GPU
Tutorial 50: Procedural Texturing & Modeling Tutorial 50: Procedural Texturing & Modeling