Module: GR3

Extended by:
CheckError, GRCommons::GRCommonUtils
Defined in:
lib/gr3.rb,
lib/gr3/ffi.rb,
lib/gr3/gr3base.rb,
lib/gr3/version.rb,
lib/gr_commons/gr_logger.rb

Overview

Note:

Why not GR::GR3?

  • kojix2 did not want to force gr3 to be loaded when gr is loaded.

  • kojix2 did not want to write ‘GR3 = GR::GR3` or something.

  • This is a opinion of kojix2 and may be changed by future maintainers.

Note:

GR3 uses Numo::Narrray.

OverView of GR.rb

+--------------------+  +--------------------+
| GR module          |  | GR3 module         |
| +----------------+ |  | +----------------+ |
| | GR::FFI        | |  | | GR3::FFI       | |
| | +   libGR.so   | |  | | +    libGR3.so | |
| +----------------+ |  | +----------------+ |
|   | define_method  |  |   | define_method  |
| +----------------+ |  | +----------------+ |
| | | GR::GRBase   | |  | | | GR3::GR3Base | |
| | v  (Pri^ate)   | |  | | v  (Pri^ate)   | |
| +++--------------+ |  | +++--------------+ |
|  | Extend          |  |  | Extend          |
|  v                 |  |  v       +-------+ |
|      +-----------+ |  |          | Check | |
|      | GR::Plot  | |  |       <--+ Error | |
|      +-----------+ |  |          +-------+ |
+--------------------+  +----------+---------+
          ^                        ^
          |  +------------------+  |
   Extend |  | GRCommons module |  | Extend
          |  | +--------------+ |  |
          |  | |    Fiddley   | |  |
          |  | +--------------+ |  |
          |  | +--------------+ |  |
          +----+ CommonUtils  +----+
          |  | +--------------+ |  |
          |  | +--------------+ |  |
          +----+    Version   +----+
          |  | +--------------+ |
          |  | +--------------+ |
          +----+JupyterSupport| |
             | +--------------+ |
             +------------------+

(You can edit the above AA diagram with asciiflow.com/)

Fiddley is Ruby-FFI compatible API layer for Fiddle.

This is a procedural interface to the GR3 in GR plotting library, github.com/sciapp/gr

Defined Under Namespace

Modules: CheckError, FFI Classes: Error, NotFoundError

Constant Summary collapse

IA_END_OF_LIST =

InitAttribute

0
IA_FRAMEBUFFER_WIDTH = 
1
IA_FRAMEBUFFER_HEIGHT = 
2
IA_NUM_THREADS = 
3
ERROR_NONE =

Error

0
ERROR_INVALID_VALUE = 
1
ERROR_INVALID_ATTRIBUTE = 
2
ERROR_INIT_FAILED = 
3
ERROR_OPENGL_ERR = 
4
ERROR_OUT_OF_MEM = 
5
ERROR_NOT_INITIALIZED = 
6
ERROR_CAMERA_NOT_INITIALIZED = 
7
ERROR_UNKNOWN_FILE_EXTENSION = 
8
ERROR_CANNOT_OPEN_FILE = 
9
ERROR_EXPORT = 
10
QUALITY_OPENGL_NO_SSAA =

Quality

0
QUALITY_OPENGL_2X_SSAA = 
2
QUALITY_OPENGL_4X_SSAA = 
4
QUALITY_OPENGL_8X_SSAA = 
8
QUALITY_OPENGL_16X_SSAA = 
16
QUALITY_POVRAY_NO_SSAA = 
0 + 1
QUALITY_POVRAY_2X_SSAA = 
2 + 1
QUALITY_POVRAY_4X_SSAA = 
4 + 1
QUALITY_POVRAY_8X_SSAA = 
8 + 1
QUALITY_POVRAY_16X_SSAA = 
16 + 1
DRAWABLE_OPENGL =

Drawable

1
DRAWABLE_GKS = 
2
PROJECTION_PERSPECTIVE =

Projection

0
PROJECTION_PARALLEL = 
1
PROJECTION_ORTHOGRAPHIC = 
2
SURFACE_DEFAULT =

SurfaceOption

0
SURFACE_NORMALS = 
1
SURFACE_FLAT = 
2
SURFACE_GRTRANSFORM = 
4
SURFACE_GRCOLOR = 
8
SURFACE_GRZSHADED = 
16
ATOM_COLORS = 
[[0, 0, 0],
[255, 255, 255], [217, 255, 255], [204, 128, 255],
[194, 255, 0], [255, 181, 181], [144, 144, 144],
[48, 80, 248], [255, 13, 13], [144, 224, 80],
[179, 227, 245], [171, 92, 242], [138, 255, 0],
[191, 166, 166], [240, 200, 160], [255, 128, 0],
[255, 255, 48], [31, 240, 31], [128, 209, 227],
[143, 64, 212], [61, 225, 0], [230, 230, 230],
[191, 194, 199], [166, 166, 171], [138, 153, 199],
[156, 122, 199], [224, 102, 51], [240, 144, 160],
[80, 208, 80], [200, 128, 51], [125, 128, 176],
[194, 143, 143], [102, 143, 143], [189, 128, 227],
[225, 161, 0], [166, 41, 41], [92, 184, 209],
[112, 46, 176], [0, 255, 0], [148, 255, 255],
[148, 224, 224], [115, 194, 201], [84, 181, 181],
[59, 158, 158], [36, 143, 143], [10, 125, 140],
[0, 105, 133], [192, 192, 192], [255, 217, 143],
[166, 117, 115], [102, 128, 128], [158, 99, 181],
[212, 122, 0], [148, 0, 148], [66, 158, 176],
[87, 23, 143], [0, 201, 0], [112, 212, 255],
[255, 255, 199], [217, 225, 199], [199, 225, 199],
[163, 225, 199], [143, 225, 199], [97, 225, 199],
[69, 225, 199], [48, 225, 199], [31, 225, 199],
[0, 225, 156], [0, 230, 117], [0, 212, 82],
[0, 191, 56], [0, 171, 36], [77, 194, 255],
[77, 166, 255], [33, 148, 214], [38, 125, 171],
[38, 102, 150], [23, 84, 135], [208, 208, 224],
[255, 209, 35], [184, 184, 208], [166, 84, 77],
[87, 89, 97], [158, 79, 181], [171, 92, 0],
[117, 79, 69], [66, 130, 150], [66, 0, 102],
[0, 125, 0], [112, 171, 250], [0, 186, 255],
[0, 161, 255], [0, 143, 255], [0, 128, 255],
[0, 107, 255], [84, 92, 242], [120, 92, 227],
[138, 79, 227], [161, 54, 212], [179, 31, 212],
[179, 31, 186], [179, 13, 166], [189, 13, 135],
[199, 0, 102], [204, 0, 89], [209, 0, 79],
[217, 0, 69], [224, 0, 56], [230, 0, 46],
[235, 0, 38], [255, 0, 255], [255, 0, 255],
[255, 0, 255], [255, 0, 255], [255, 0, 255],
[255, 0, 255], [255, 0, 255], [255, 0, 255],
[255, 0, 255]].map! { |i| i.map! { |j| j / 255.0 } }
ATOM_NUMBERS = 
atom_number.freeze
ATOM_VALENCE_RADII = 
[0, # Avoid atomic number to index conversion
230, 930, 680, 350, 830, 680, 680, 680, 640,
1120, 970, 1100, 1350, 1200, 750, 1020, 990,
1570, 1330, 990, 1440, 1470, 1330, 1350, 1350,
1340, 1330, 1500, 1520, 1450, 1220, 1170, 1210,
1220, 1210, 1910, 1470, 1120, 1780, 1560, 1480,
1470, 1350, 1400, 1450, 1500, 1590, 1690, 1630,
1460, 1460, 1470, 1400, 1980, 1670, 1340, 1870,
1830, 1820, 1810, 1800, 1800, 1990, 1790, 1760,
1750, 1740, 1730, 1720, 1940, 1720, 1570, 1430,
1370, 1350, 1370, 1320, 1500, 1500, 1700, 1550,
1540, 1540, 1680, 1700, 2400, 2000, 1900, 1880,
1790, 1610, 1580, 1550, 1530, 1510, 1500, 1500,
1500, 1500, 1500, 1500, 1500, 1500, 1600, 1600,
1600, 1600, 1600, 1600, 1600, 1600, 1600, 1600,
1600, 1600, 1600, 1600, 1600, 1600].map { |i| i / 1000.0 }
ATOM_RADII = 
ATOM_VALENCE_RADII.map { |i| i * 0.4 }
VERSION = 
GRCommons::VERSION

Constants included from GRCommons::GRCommonUtils

GRCommons::GRCommonUtils::SUPPORTED_TYPES

Class Attribute Summary collapse

Class Method Summary collapse

Methods included from GRCommons::GRCommonUtils

create_ffi_pointer, double, equal_length, float, inquiry, inquiry_double, inquiry_int, inquiry_uint, int, narray?, read_ffi_pointer, uint, uint16, uint8

Methods included from CheckError

geterror

Class Attribute Details

.ffi_lib ⇒ Object

Returns the value of attribute ffi_lib.



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# File 'lib/gr3.rb', line 64

def ffi_lib
  @ffi_lib
end

Class Method Details

.cameralookat ⇒ Object

This function sets the view matrix by getting the position of the camera, the position of the center of focus and the direction which should point up. This function takes effect when the next image is created. Therefore if you want to take pictures of the same data from different perspectives, you can call and gr3_cameralookat(), gr3_getpixmap_(), gr3_cameralookat(), gr3_getpixmap_(), … without calling gr3_clear() and gr3_drawmesh() again.




# File 'lib/gr3.rb', line 308

.clear ⇒ Integer

This function clears the draw list.




# File 'lib/gr3.rb', line 181

.createheightmapmesh ⇒ Integer 




# File 'lib/gr3.rb', line 367

.createindexedmesh(num_vertices, vertices, normals, colors, num_indices, indices) ⇒ Integer

This function creates an indexed mesh from vertex information (position, normal and color) and triangle information (indices). Returns a mesh.



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# File 'lib/gr3.rb', line 275

def createindexedmesh(num_vertices, vertices, normals, colors, num_indices, indices)
  inquiry_int do |mesh|
    super(mesh, num_vertices, vertices, normals, colors, num_indices, indices)
  end
end

.createindexedmesh_nocopy(num_vertices, vertices, normals, colors, num_indices, indices) ⇒ Integer

This function creates a mesh from vertex position, normal and color data.



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# File 'lib/gr3.rb', line 252

def createindexedmesh_nocopy(num_vertices, vertices, normals, colors, num_indices, indices)
  inquiry_int do |mesh|
    super(mesh, num_vertices, vertices, normals, colors, num_indices, indices)
  end
end

.createisosurfacemesh(grid, step, offset, isolevel) ⇒ Integer

This function creates an isosurface from voxel data using the marching cubes algorithm. Returns a mesh.



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# File 'lib/gr3.rb', line 414

def createisosurfacemesh(grid, step, offset, isolevel)
  args = _preprocess_createslicemesh(grid, step, offset)
  grid = args.shift
  inquiry_int do |mesh|
    super(mesh, uint16(grid), isolevel, *args)
  end
end

.createmesh(n, vertices, normals, colors) ⇒ Integer

This function creates a int from vertex position, normal and color data. Returns a mesh.



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# File 'lib/gr3.rb', line 243

def createmesh(n, vertices, normals, colors)
  inquiry_int do |mesh|
    super(mesh, n, vertices, normals, colors)
  end
end

.createmesh_nocopy(n, vertices, normals, colors) ⇒ Integer

This function creates a mesh from vertex position, normal and color data.



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# File 'lib/gr3.rb', line 226

def createmesh_nocopy(n, vertices, normals, colors)
  inquiry_int do |mesh|
    super(mesh, n, vertices, normals, colors)
  end
end

.createslicemeshes(grid, x = nil, y = nil, z = nil, step = nil, offset = nil) ⇒ Object

Creates meshes for slices through the given data, using the current GR colormap. Use the parameters x, y or z to specify what slices should be drawn and at which positions they should go through the data. If neither x nor y nor z are set, 0.5 will be used for all three. Returns meshes for the yz-slice, the xz-slice and the xy-slice.



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# File 'lib/gr3.rb', line 605

def createslicemeshes(grid, x = nil, y = nil, z = nil, step = nil, offset = nil)
  if [x, y, z].all?(&:nil?)
    x = 0.5
    y = 0.5
    z = 0.5
  end
  mesh_x = (createxslicemesh(grid, x, step, offset) if x)
  mesh_y = (createyslicemesh(grid, y, step, offset) if y)
  mesh_z = (createzslicemesh(grid, z, step, offset) if z)
  [mesh_x, mesh_y, mesh_z]
end

.createsurfacemesh(nx, ny, x, y, z, option = 0) ⇒ Integer

Create a mesh of a surface plot similar to gr_surface. Uses the current colormap. To apply changes of the colormap a new mesh has to be created.



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# File 'lib/gr3.rb', line 446

def createsurfacemesh(nx, ny, x, y, z, option = 0)
  inquiry_int do |mesh|
    super(mesh, nx, ny, x, y, z, option)
  end
end

.createtubemesh(n, points, colors, radii, num_steps = 10, num_segments = 20) ⇒ Integer

Create a mesh object in the shape of a tube following a path given by a list of points. The colors and radii arrays specify the color and radius at each point.



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# File 'lib/gr3.rb', line 524

def createtubemesh(n, points, colors, radii, num_steps = 10, num_segments = 20)
  inquiry_uint do |mesh| # mesh should be Int?
    super(mesh, n, points, colors, radii, num_steps, num_segments)
  end
end

.createxslicemesh(grid, x = 0.5, step = nil, offset = nil) ⇒ Object

Creates a meshes for a slices through the yz-plane of the given data, using the current GR colormap. Use the x parameter to set the position of the yz-slice. Returns a mesh for the yz-slice.



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# File 'lib/gr3.rb', line 626

def createxslicemesh(grid, x = 0.5, step = nil, offset = nil)
  args = _preprocess_createslicemesh(grid, step, offset)
  grid = args.shift
  x = (x.clamp(0, 1) * args[0]).floor
  inquiry_int do |mesh|
    super(mesh, uint16(grid), x, *args)
  end
end

.createyslicemesh(grid, y = 0.5, step = nil, offset = nil) ⇒ Object

Creates a meshes for a slices through the xz-plane of the given data, using the current GR colormap. Use the y parameter to set the position of the xz-slice. Returns a mesh for the xz-slice.



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# File 'lib/gr3.rb', line 645

def createyslicemesh(grid, y = 0.5, step = nil, offset = nil)
  args = _preprocess_createslicemesh(grid, step, offset)
  grid = args.shift
  y = (y.clamp(0, 1) * args[1]).floor
  inquiry_int do |mesh|
    super(mesh, uint16(grid), y, *args)
  end
end

.createzslicemesh(grid, z = 0.5, step = nil, offset = nil) ⇒ Object

Creates a meshes for a slices through the xy-plane of the given data, using the current GR colormap. Use the z parameter to set the position of the xy-slice. Returns a mesh for the xy-slice.



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# File 'lib/gr3.rb', line 664

def createzslicemesh(grid, z = 0.5, step = nil, offset = nil)
  args = _preprocess_createslicemesh(grid, step, offset)
  grid = args.shift
  z = (z.clamp(0, 1) * args[2]).floor
  inquiry_int do |mesh|
    super(mesh, uint16(grid), z, *args)
  end
end

.deletemesh ⇒ Object

This function marks a mesh for deletion and removes the user’s reference from the mesh’s referenc counter, so a user must not use the mesh after calling this function.




# File 'lib/gr3.rb', line 300

.drawconemesh ⇒ Object

This function allows drawing a cylinder without requiring a mesh.




# File 'lib/gr3.rb', line 372

.drawcubemesh ⇒ Object 




# File 'lib/gr3.rb', line 381

.drawcylindermesh ⇒ Object

This function allows drawing a cylinder without requiring a mesh.




# File 'lib/gr3.rb', line 375

.drawheightmap ⇒ Object 




# File 'lib/gr3.rb', line 370

.drawimage ⇒ Integer 




# File 'lib/gr3.rb', line 220

.drawmesh ⇒ Object

This function adds a mesh to the draw list, so it will be drawn when the user calls getpixmap. The given data stays owned by the user, a copy will be saved in the draw list and the mesh reference counter will be increased.

This function does not return an error code, because of its asynchronous nature. If gr3_getpixmap_() returns a GR3_ERROR_OPENGL_ERR, this might be caused by this function saving unuseable data into the draw list.




# File 'lib/gr3.rb', line 281

.drawmesh_grlike ⇒ Object

Draw a mesh with the projection of gr. It uses the current projection parameters (rotation, tilt) of gr. This function alters the projection type, the projection parameters, the viewmatrix and the light direction. If necessary, the user has to save them before the call to this function and restore them after the call to gr3_drawimage.




# File 'lib/gr3.rb', line 452

.drawmolecule(positions, colors = nil, radii = nil, spins = nil, bond_radius = nil, bond_color = nil, bond_delta = nil, set_camera = true, rotation = 0, tilt = 0) ⇒ Object

drawmolecule



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# File 'lib/gr3.rb', line 540

def drawmolecule(positions, colors = nil, radii = nil, spins = nil,
                 bond_radius = nil, bond_color = nil, bond_delta = nil,
                 set_camera = true, rotation = 0, tilt = 0)
  # Should `drawmolecule` take keyword arguments?
  # Setting default values later for now.

  # Should it be RubyArray instead of Narray?
  # If NArray is required, add no NArray error.
  positions = Numo::SFloat.cast(positions)
  n = positions.shape[0]

  colors = if colors.nil?
             Numo::SFloat.ones(n, 3)
           else
             Numo::SFloat.cast(colors).reshape(n, 3)
           end

  radii = if radii.nil?
            Numo::SFloat.new(n).fill(0.3)
          else
            Numo::SFloat.cast(radii).reshape(n)
          end

  bond_color ||= [0.8, 0.8, 0.8]
  bond_color = Numo::SFloat.cast(bond_color).reshape(3)
  bond_delta ||= 1.0
  bond_radius ||= 0.1

  if set_camera
    deg2rad = ->(degree) { degree * Math::PI / 180 } # room for improvement
    cx, cy, cz = *positions.mean(axis: 0)
    dx, dy, dz = *positions.ptp(axis: 0)
    d = [dx, dy].max / 2 / 0.4142 + 3
    r = dz / 2 + d
    rx = r * Math.sin(deg2rad.call(tilt)) * Math.sin(deg2rad.call(rotation))
    ry = r * Math.sin(deg2rad.call(tilt)) * Math.cos(deg2rad.call(rotation))
    rz = r * Math.cos(deg2rad.call(tilt))
    ux = Math.sin(deg2rad.call(tilt + 90)) * Math.sin(deg2rad.call(rotation))
    uy = Math.sin(deg2rad.call(tilt + 90)) * Math.cos(deg2rad.call(rotation))
    uz = Math.cos(deg2rad.call(tilt + 90))
    cameralookat(cx + rx, cy + ry, cz + rz, cx, cy, cz, ux, uy, uz)
    setcameraprojectionparameters(45, d - radii.max - 3, d + dz + radii.max + 3)
  end

  super(n, positions, colors, radii, bond_radius, bond_color, bond_delta)

  if spins
    spins = Numo::SFloat.cast(spins).reshape(n, 3)
    drawspins(positions, spins, colors)
  end
end

.drawslicemeshes(grid, x = nil, y = nil, z = nil, step = nil, offset = nil, position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0], color = [1, 1, 1], scale = [1, 1, 1]) ⇒ Object

raw slices through the given data, using the current GR colormap. Use the parameters x, y or z to specify what slices should be drawn and at which positions they should go through the data. If neither x nor y nor z are set, 0.5 will be used for all three.



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# File 'lib/gr3.rb', line 754

def drawslicemeshes(grid, x = nil, y = nil, z = nil, step = nil,
                    offset = nil, position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0],
                    color = [1, 1, 1], scale = [1, 1, 1])
  meshes = createslicemeshes(grid, x, y, z, step, offset)
  meshes.each do |mesh|
    if mesh
      drawmesh(mesh, 1, position, direction, up, color, scale)
      deletemesh(mesh)
    end
  end
end

.drawspheremesh ⇒ Object

This function allows drawing a sphere without requiring a mesh.




# File 'lib/gr3.rb', line 378

.drawspins(positions, directions, colors = nil, cone_radius = 0.4, cylinder_radius = 0.2, cone_height = 1.0, cylinder_height = 1.0) ⇒ Object

drawspins



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# File 'lib/gr3.rb', line 531

def drawspins(positions, directions, colors = nil,
              cone_radius = 0.4, cylinder_radius = 0.2,
              cone_height = 1.0, cylinder_height = 1.0)
  n = positions.length
  colors = [1] * n * 3 if colors.nil?
  super(n, positions, directions, colors, cone_radius, cylinder_radius, cone_height, cylinder_height)
end

.drawsurface ⇒ Object

Convenience function for drawing a surfacemesh.




# File 'lib/gr3.rb', line 470

.drawtubemesh(n, points, colors, radii, num_steps = 10, num_segments = 20) ⇒ Integer

Draw a tube following a path given by a list of points. The colors and radii arrays specify the color and radius at each point.



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# File 'lib/gr3.rb', line 505

def drawtubemesh(n, points, colors, radii, num_steps = 10, num_segments = 20)
  super(n, points, colors, radii, num_steps, num_segments)
end

.drawxslicemesh(grid, x = 0.5, step = nil, offset = nil, position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0], color = [1, 1, 1], scale = [1, 1, 1]) ⇒ Object

Draw a yz-slice through the given data, using the current GR colormap.



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# File 'lib/gr3.rb', line 686

def drawxslicemesh(grid, x = 0.5, step = nil, offset = nil,
                   position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0],
                   color = [1, 1, 1], scale = [1, 1, 1])
  mesh = createxslicemesh(grid, x, step, offset)
  drawmesh(mesh, 1, position, direction, up, color, scale)
  deletemesh(mesh)
end

.drawyslicemesh(grid, y = 0.5, step = nil, offset = nil, position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0], color = [1, 1, 1], scale = [1, 1, 1]) ⇒ Object

Draw a xz-slice through the given data, using the current GR colormap.



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# File 'lib/gr3.rb', line 707

def drawyslicemesh(grid, y = 0.5, step = nil, offset = nil,
                   position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0],
                   color = [1, 1, 1], scale = [1, 1, 1])
  mesh = createyslicemesh(grid, y, step, offset)
  drawmesh(mesh, 1, position, direction, up, color, scale)
  deletemesh(mesh)
end

.drawzslicemesh(grid, z = 0.5, step = nil, offset = nil, position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0], color = [1, 1, 1], scale = [1, 1, 1]) ⇒ Object

Draw a xy-slice through the given data, using the current GR colormap.



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# File 'lib/gr3.rb', line 728

def drawzslicemesh(grid, z = 0.5, step = nil, offset = nil,
                   position = [0, 0, 0], direction = [0, 0, 1], up = [0, 1, 0],
                   color = [1, 1, 1], scale = [1, 1, 1])
  mesh = createzslicemesh(grid, z, step, offset)
  drawmesh(mesh, 1, position, direction, up, color, scale)
  deletemesh(mesh)
end

.export ⇒ Integer 




# File 'lib/gr3.rb', line 217

.free ⇒ Object 




# File 'lib/gr3.rb', line 139

.getcameraprojectionparameters ⇒ Integer

Get the projection parameters.




# File 'lib/gr3.rb', line 345

.geterror ⇒ Integer

Note:

This method is defined in the CheckError module.

This function returns information on the most recent GR3 error.




# File 'lib/gr3.rb', line 148

.geterrorstring ⇒ String

This function returns a string representation of a given error code.



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# File 'lib/gr3.rb', line 177

def geterrorstring(*)
  super.to_s
end

.getimage(width, height, use_alpha = true) ⇒ Integer 



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# File 'lib/gr3.rb', line 210

def getimage(width, height, use_alpha = true)
  bpp = use_alpha ? 4 : 3
  inquiry(uint8: width * height * bpp) do |bitmap|
    super(width, height, (use_alpha ? 1 : 0), bitmap)
  end
end

.getprojectiontype ⇒ Integer 




# File 'lib/gr3.rb', line 394

.getrenderpathstring ⇒ String

This function allows the user to find out how his commands are rendered.

If gr3 is initialized, a string in the format: ‘“gr3 - ” + window toolkit + “ - ” + framebuffer extension + “ - ” + OpenGL version + “ - ” + OpenGL renderer string`. For example `“gr3 - GLX - GL_ARB_framebuffer_object - 2.1 Mesa 7.10.2 - Software Rasterizer”` might be returned on a Linux system (using GLX) with an available GL_ARB_framebuffer_object implementation. If gr3 is not initialized `“Not initialized”` is returned.



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# File 'lib/gr3.rb', line 169

def getrenderpathstring(*)
  super.to_s
end

.getviewmatrix ⇒ Object 




# File 'lib/gr3.rb', line 388

.gr3_init ⇒ Integer

This method initializes the gr3 context.




# File 'lib/gr3.rb', line 133

.selectid ⇒ Integer 




# File 'lib/gr3.rb', line 385

.setbackgroundcolor ⇒ Object

This function sets the background color.




# File 'lib/gr3.rb', line 364

.setcameraprojectionparameters ⇒ Integer

This function sets the projection parameters. This function takes effect when the next image is created.

The ratio between zFar and zNear influences the precision of the depth buffer, the greater (zFar/zNear), the more likely are errors. So you should try to keep both values as close to each other as possible while making sure everything you want to be visible, is visible.




# File 'lib/gr3.rb', line 327

.setlightdirection ⇒ Object

This function sets the direction of light. If it is called with (0, 0, 0), the light is always pointing into the same direction as the camera.




# File 'lib/gr3.rb', line 355

.setobjectid ⇒ Object 




# File 'lib/gr3.rb', line 383

.setprojectiontype ⇒ Object 




# File 'lib/gr3.rb', line 398

.setquality ⇒ Integer

Set rendering quality




# File 'lib/gr3.rb', line 201

.setviewmatrix ⇒ Object 




# File 'lib/gr3.rb', line 391

.surface(x, y, z, option) ⇒ Object

Create a surface plot with gr3 and draw it with gks as cellarray.



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# File 'lib/gr3.rb', line 484

def surface(x, y, z, option)
  nx = x.length
  ny = y.length
  # TODO: Check out_of_bounds
  super(nx, ny, x, y, z, option)
end

.terminate ⇒ Object

This function terminates the gr3 context.

After calling this function, gr3 is in the same state as when it was first loaded, except for context-independent variables, i.e. the logging callback.




# File 'lib/gr3.rb', line 141

.usecurrentframebuffer ⇒ Object

Use the currently bound framebuffer as the framebuffer used for drawing to OpenGL (using gr3.drawimage). This function is only needed when you do not want to render to 0, the default framebuffer.




# File 'lib/gr3.rb', line 187

.useframebuffer ⇒ Object

Set the framebuffer used for drawing to OpenGL (using gr3.drawimage).

This function is only needed when you do not want to render to 0, the default framebuffer.




# File 'lib/gr3.rb', line 194

.volume(data, algorithm) ⇒ Object 



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# File 'lib/gr3.rb', line 766

def volume(data, algorithm)
  data = Numo::DFloat.cast(data) if data.is_a? Array
  inquiry i[double double] do |dmin, dmax|
    dmin.write_double(-1)
    dmax.write_double(-1)
    nx, ny, nz = data.shape
    super(nx, ny, nz, data, algorithm, dmin, dmax)
  end
end