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#python
import k3d
# Well-behaved scripts never wait for user-input if batch_mode() is enabled ...
if not k3d.batch_mode():
import pygtk
pygtk.require('2.0')
import gtk
import math
def mix(a, b, amount):
return (a * (1 - amount)) + (b * amount)
x1 = -5
x2 = 5
xcount = 29
y1 = -5
y2 = 5
ycount = 29
function = "-2 * math.sqrt(math.fabs(x * y))"
x1_entry = gtk.Entry()
x1_entry.set_text(str(x1))
x2_entry = gtk.Entry()
x2_entry.set_text(str(x2))
xcount_entry = gtk.Entry()
xcount_entry.set_text(str(xcount))
y1_entry = gtk.Entry()
y1_entry.set_text(str(y1))
y2_entry = gtk.Entry()
y2_entry.set_text(str(y2))
ycount_entry = gtk.Entry()
ycount_entry.set_text(str(ycount))
function_entry = gtk.Entry()
function_entry.set_text(str(function))
table = gtk.Table(7, 2)
table.attach(gtk.Label("x1"), 0, 1, 0, 1)
table.attach(x1_entry, 1, 2, 0, 1)
table.attach(gtk.Label("x2"), 0, 1, 1, 2)
table.attach(x2_entry, 1, 2, 1, 2)
table.attach(gtk.Label("xcount"), 0, 1, 2, 3)
table.attach(xcount_entry, 1, 2, 2, 3)
table.attach(gtk.Label("y1"), 0, 1, 3, 4)
table.attach(y1_entry, 1, 2, 3, 4)
table.attach(gtk.Label("y2"), 0, 1, 4, 5)
table.attach(y2_entry, 1, 2, 4, 5)
table.attach(gtk.Label("ycount"), 0, 1, 5, 6)
table.attach(ycount_entry, 1, 2, 5, 6)
table.attach(gtk.Label("function"), 0, 1, 6, 7)
table.attach(function_entry, 1, 2, 6, 7)
dialog = gtk.Dialog("Plot Function", None, gtk.DIALOG_MODAL | gtk.DIALOG_NO_SEPARATOR, (gtk.STOCK_OK, gtk.RESPONSE_ACCEPT, gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT))
dialog.vbox.pack_start(table)
dialog.show_all()
result = gtk.RESPONSE_ACCEPT
if not k3d.batch_mode():
result = dialog.run()
dialog.hide()
if result == gtk.RESPONSE_ACCEPT:
x1 = float(x1_entry.get_text())
x2 = float(x2_entry.get_text())
xcount = int(xcount_entry.get_text())
y1 = float(y1_entry.get_text())
y2 = float(y2_entry.get_text())
ycount = int(ycount_entry.get_text())
function = function_entry.get_text()
context.document.start_change_set()
try:
# Create a FrozenMesh node to act as a mesh source ...
frozen_mesh = k3d.plugin.create("FrozenMesh", context.document)
frozen_mesh.name = function
# Create a mesh ...
mesh = frozen_mesh.create_mesh()
# Add geometric points to the mesh ...
points = mesh.create_points()
point_selection = mesh.create_point_selection()
for xi in range(0, xcount):
for yi in range(0, ycount):
x = mix(x1, x2, float(xi) / (xcount - 1))
y = mix(y1, y2, float(yi) / (ycount - 1))
z = eval(function)
points.append(k3d.point3(x, y, z))
point_selection.append(0.0)
# Create a particle primitive ...
particles = k3d.particle.create(mesh)
# Create a custom attribute array to control the widths of particles ...
constantwidth = particles.constant_attributes().create("constantwidth", "k3d::double_t")
particles.material().append(None)
constantwidth.append(0.2)
for i in range(len(points)):
particles.points().append(i)
# Connect the FrozenMesh to a MeshInstance to place it in the scene ...
mesh_instance = k3d.plugin.create("MeshInstance", context.document)
mesh_instance.name = function + " Instance"
mesh_instance.gl_painter = k3d.node.lookup_one(context.document, "GL Default Painter")
mesh_instance.ri_painter = k3d.node.lookup_one(context.document, "RenderMan Default Painter")
k3d.property.connect(context.document, frozen_mesh.get_property("output_mesh"), mesh_instance.get_property("input_mesh"))
# Make the MeshInstance visible to render engines ...
k3d.node.show(context.document, mesh_instance)
context.document.finish_change_set("Plot " + function)
except:
context.document.cancel_change_set()
raise
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