Package Jitter

jit.gl.multiple

Create multiple object instances

Description

Uses several jit.matrix objects to repeatedly draw an instance of a jit.gl object like jit.gl.mesh or jit.gl.gridshape. It attaches to a named instance of a jit.gl (OB3D) object provided by the name attribute.

Discussion

Parameters that can be set include position, rotate, rotatexyz, scale, color, tex_plane_s, tex_plane_t, and texture. All of these parameters take float32 matrices except texture which takes a char specifying the texture from a list. Parameter matrices can be of differing dim sizes, and will wrap to the dimensions of the matrix specified by the dimparam attribute.

For transformation attributes (position, rotate, rotatexyz, and scale), the order parameters are listed in the glparams attribute determines the order transformations are applied. The standard jit.gl transformation order is position, rotate, scale.

Arbitrary object attributes and shader parameters can be set by including in the glparams list attr. followed by the attr name, or shader. followed by the shader parameter name. For example, shader.zoom creates a matrix input for the zoom parameter of the td.rota.jxs shader, and attr.rad_minor creates a matrix input for the rad_minor attribute of a jit.gl.gridshape.

This object requires one argument: the name of a drawing context. 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. Additionally it can reference the name of a jit.gl.node sub-context. This value may also be set via the OB3D drawto attribute. If no argument is present, the object is implicitly added to the first valid drawing context or sub-context found in the current patch or by searching up the patcher hierarchy.

There is an optional second argument which specifies the number of inlets corresponding to the number of arguments in the glparams attribute. If this second argument is not present, the default number of inlets is two. Those inlets will be for position and scale if the glparams attribute is not specified. If there are glparams, it defaults to the first two specified params.

Attributes

dimparam[symbol]

The name of the input parameter to wrap all other input matrices to.

glparams[10 symbols]

The list of OB3D attributes corresponding to object inlets that are modifiable by passing in a matrix. Valid attributes are position, rotate (angle-axis), rotatexyz, scale, color, texture, tex_plane_s, and tex_plane_t.

targetmode[int]

Flag for draw mode. 1 = draw_raw, 0 = draw.

targetname[symbol]

The name of the jit.gl object to attach to and draw multiple times.

texture[256 symbols]

The list of textures that could potentially be bound to the OB3D object. The specific texture can be specified by passing in a char matrix where the values of the matrix index into the texture list.

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

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 .

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.

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.

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.

lighting_enable[int]

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

line_width[float]

The drawing line width (default = 1.)

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)

point_mode[symbol]

Point drawing mode to use when points drawing primitive (poly_mode 2) is enabled (default = circle). Possible values:

'square' ( Draw point as square )
'circle' ( Draw point as circle )
'square_depth' ( Draw point as square with depth scaling )
'circle_depth' ( Draw point as circle with depth scaling )
'user_shader' ( Allow writing to gl_PointSize in custom vertex shader )

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)

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);

viewalign[int]

View aligned transformation flag (default = 0)

Common Box Attributes

Below is a list of attributes shared by all objects. If you want to change one of these attributes for an object based on the object box, you need to place the word sendbox in front of the attribute name, or use the object's Inspector.

annotation[symbol]

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

background[int]: 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]: 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]: 0

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

jspainterfile[symbol]

JS Painter File

patching_rect[4 floats]: 0. 0. 100. 0.

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

position[2 floats]
write-only

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]: 0

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

presentation_rect[4 floats]: 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]
write-only

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]
write-only

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[4 floats]

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

textjustification[int]

Sets the justification for the object's text. 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.

Messages

(drag)

Drag and drop a Jitter material file

color_matrix

Specifies a named matrix to use for the color parameter if it's in the glparams list. Must be a 4-plane float32 matrix in RGBA format.

Arguments:
  • matrix name [symbol]

position_matrix

Specifies a named matrix to use for the position parameter if it's in the glparams list. Must be a 3-plane float32 matrix.

Arguments:
  • matrix name [symbol]

rotate_matrix

Specifies a named matrix to use for the rotate (angle-axis) parameter if it's in the glparams list. Must be a 4-plane float32 matrix.

Arguments:
  • matrix name [symbol]

rotatexyz_matrix

Specifies a named matrix to use for the rotatexyz parameter if it's in the glparams list. Must be a 3-plane float32 matrix.

Arguments:
  • matrix name [symbol]

scale_matrix

Specifies a named matrix to use for the scale parameter if it's in the glparams list. Must be a 3-plane float32 matrix.

Arguments:
  • matrix name [symbol]

tex_plane_s_matrix

Specifies a named matrix to use for the tex_plane_s parameter if it's in the glparams list. Must be a 4-plane float32 matrix. The tex_map attribute of the target gl object must be set to 1 or 3.

Arguments:
  • matrix name [symbol]

tex_plane_t_matrix

Specifies a named matrix to use for the tex_plane_t parameter if it's in the glparams list. Must be a 4-plane float32 matrix. The tex_map attribute of the target gl object must be set to 1 or 3.

Arguments:
  • matrix name [symbol]

texture_matrix

Specifies a named matrix to use for the texture parameter if it's in the glparams list. Must be a char matrix.

Arguments:
  • matrix name [symbol]

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

Move the object along the axis provided, relative to the space indicated by animmode.

Arguments:
  • x [float]
  • y [float]
  • z [float]

anim_turn

Rotate the object along each axis by the amount provided, relative to the space indicated by animmode.

Arguments:
  • x [float]
  • y [float]
  • z [float]

anim_grow

Scale the object along each axis by the amount provided.

Arguments:
  • x [float]
  • y [float]
  • z [float]

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).

jit_gl_texture

Binds the texture specified by texture-name to this object. Equivalent to setting the texture attribute to texture-name .

Arguments:
  • texture-name [symbol]

get_shader

Open an editor window containing the object's current JXS shader.

export_geometry

Export the object's geometry state as model file with the name specified by the first argument. The second argument sets the file type (default = gltf). Available file types are gltf (GL Transmission Format), ply (Stanford Polygon Library), and stl (Stereolithography).

Arguments:
  • filename [symbol]
  • file-type [symbol]

See Also

Name Description
jit.gl.graph Graph floats into 3D space
jit.gl.gridshape Generate simple geometric shapes as a grid
jit.gl.handle Use mouse movement to control position/rotation
jit.gl.isosurf Generate a GL based surface extraction
jit.gl.model Read and draw various 3D model formats
jit.gl.nurbs Generate NURBS surface
jit.gl.plato Generate platonic solids
jit.gl.render Render Jitter OpenGL objects
jit.gl.shader Manage a GL shader
jit.gl.sketch Use drawing commands with OpenGL
jit.gl.slab Process texture data
jit.gl.text2d Render bitmap text
jit.gl.text3d Render vector text
jit.gl.texture Create OpenGL textures
jit.gl.videoplane Display video in OpenGL
jit.gl.volume Create a volume visualization