Added a stamp painter for concentric disks.

3 files changed, 179 insertions, 1 deletions

diff --git a/MANIFEST b/MANIFEST
index be6adc7..4154f0e 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -146,6 +146,7 @@ ep_sampler_centeredwalk.py
 ep_sampler_randomwalk.py
 ep_sampler_rectilineargrid.py
 ep_sampler_squaregrid.py
+ep_stamp_disk.py
 ep_stamp_filledcyclic.py
 ep_stamp_glyph.py
 ep_stamp_svg.py
diff --git a/ep_stamp_disk.py b/ep_stamp_disk.py
new file mode 100644
index 0000000..4368150
--- /dev/null
+++ b/ep_stamp_disk.py
@@ -0,0 +1,163 @@
+# coding: UTF-8
+# Copyright 2009, 2010 Thomas Jourdan
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import math
+import model_random
+import model_locus
+import model_allele
+import model_constraintpool
+from gettext import gettext as _
+import cairo
+
+ORDER_CONSTRAINT = 'orderconstaint'
+RADIUS_CONSTRAINT = 'radiusconstraint'
+SCALE_CONSTRAINT = 'scaleconstraint'
+DIM_OUT_CONSTRAINT = 'dimoutconstraint'
+
+class DiskStamp(model_allele.Allele):
+    """DiskStamp:.
+    inv: self.radius >= 0.0
+    """
+
+    cdef = [{'bind'  : ORDER_CONSTRAINT,
+             'name'  : 'Number of nested disks',
+             'domain': model_constraintpool.FLOAT_RANGE,
+             'min'   : 1.0, 'max': 8.0},
+            {'bind'  : RADIUS_CONSTRAINT,
+             'name'  : 'Radius of the filled cyclic polygon or circle',
+             'domain': model_constraintpool.FLOAT_RANGE,
+             'min'   : 0.01, 'max': 0.25},
+            {'bind'  : DIM_OUT_CONSTRAINT,
+             'name'  : 'Difference in luminosity between successive disks',
+             'domain': model_constraintpool.FLOAT_RANGE,
+             'min'   : 0.1, 'max': 1.25},
+            {'bind'  : SCALE_CONSTRAINT,
+             'name'  : 'Difference in the radius between successive disks',
+             'domain': model_constraintpool.FLOAT_RANGE,
+             'min'   : 0.025, 'max': 0.975},
+           ]
+
+    def __init__(self, trunk, dummy):
+        """Constructor for a flip merger."""
+        super(DiskStamp, self).__init__(trunk)
+        self.order = 1.0
+        self.radius = 0.1
+        self.scale = 0.5
+        self.dim_out = 0.5
+
+    def __eq__(self, other):
+        """Equality based on radius."""
+        equal = isinstance(other, DiskStamp) \
+                and self.order == other.order \
+                and self.radius == other.radius \
+                and self.scale == other.scale \
+                and self.dim_out == other.dim_out
+        return equal
+
+    def randomize(self):
+        """Randomize the layers components."""
+        cpool = model_constraintpool.ConstraintPool.get_pool()
+        order_constraint = cpool.get(self, ORDER_CONSTRAINT)
+        self.order = model_random.uniform_constrained(order_constraint)
+        radius_constraint = cpool.get(self, RADIUS_CONSTRAINT)
+        self.radius = model_random.uniform_constrained(radius_constraint)
+        scale_constraint = cpool.get(self, SCALE_CONSTRAINT)
+        self.scale = model_random.uniform_constrained(scale_constraint)
+        dim_out_constraint = cpool.get(self, DIM_OUT_CONSTRAINT)
+        self.dim_out = model_random.uniform_constrained(dim_out_constraint)
+
+    def mutate(self):
+        """Make small random changes to the layers components."""
+        cpool = model_constraintpool.ConstraintPool.get_pool()
+        order_constraint = cpool.get(self, ORDER_CONSTRAINT)
+        self.order = model_random.jitter_constrained(self.order, order_constraint)
+        radius_constraint = cpool.get(self, RADIUS_CONSTRAINT)
+        self.radius = model_random.jitter_constrained(self.radius, radius_constraint)
+        scale_constraint = cpool.get(self, SCALE_CONSTRAINT)
+        self.scale = model_random.jitter_constrained(self.scale, scale_constraint)
+        dim_out_constraint = cpool.get(self, DIM_OUT_CONSTRAINT)
+        self.dim_out = model_random.jitter_constrained(self.dim_out, dim_out_constraint)
+
+    def swap_places(self):
+        """Nothing to do."""
+
+    def crossingover(self, other):
+        """
+        pre: isinstance(other, DiskStamp)
+        pre: isinstance(self, DiskStamp)
+        # check for distinct references, needs to copy content, not references
+        post: __return__ is not self
+        post: __return__ is not other
+        post: model_locus.unique_check(__return__, self, other) == ''
+        """
+        new_one = DiskStamp(self.get_trunk(), -1)
+        cross_sequence = model_random.crossing_sequence(4)
+        new_one.order = self.order if cross_sequence[0] else other.order
+        new_one.radius = self.radius if cross_sequence[1] else other.radius
+        new_one.scale = self.scale if cross_sequence[2] else other.scale
+        new_one.dim_out = self.dim_out if cross_sequence[3] else other.dim_out
+        return new_one
+
+    def set_stamp_extent(self, width, height):
+        """Set extent of stamp. This stamps will ignore these parameters."""
+        pass
+
+    def render(self, ctx, point, state):
+        """
+        pre: ctx is not None
+        pre: len(point) == 2
+        """
+        src = ctx.get_source()
+#        print ctx.get_source(), isinstance(ctx.get_source(), cairo.SolidPattern)
+        if isinstance(src, cairo.SolidPattern):
+            rgba = src.get_rgba()
+            dim = div = 1.0
+            for dummy in xrange(1, int(math.floor(self.order))):
+                ctx.set_source_rgba(rgba[0]*dim,
+                                    rgba[1]*dim,
+                                    rgba[2]*dim, rgba[3])
+                ctx.arc(point[0], point[1],
+                        self.radius*div, 0.0, 2.0*math.pi)
+                ctx.fill()
+                div *= self.scale
+                dim *= self.dim_out
+            ctx.set_source_rgba(rgba[0], rgba[1], rgba[2], rgba[3])
+
+    def explain(self):
+        """
+        post: len(__return__) == 3
+        """
+        str_dim_out = _('dim out: %4.3f') % self.dim_out
+        str_scale = _('scale: %4.3f') % self.scale
+        return _('Disk stamp: number of disks: ') + str(int(math.floor(self.order))) \
+               + ', ' + str_dim_out \
+               + ', ' + str_scale , \
+               None, \
+               None
+
+    def copy(self):
+        """A copy constructor.
+        post: isinstance(__return__, DiskStamp)
+        # check for distinct references, needs to copy content, not references
+        post: __return__ is not self
+        """
+        new_one = DiskStamp(self.get_trunk(), -1)
+        new_one.order = self.order
+        new_one.radius = self.radius
+        new_one.scale = self.scale
+        new_one.dim_out = self.dim_out
+        return new_one
diff --git a/po/Kandid.pot b/po/Kandid.pot
index 0d57bc6..1657051 100644
--- a/po/Kandid.pot
+++ b/po/Kandid.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2010-06-27 18:23+0200\n"
+"POT-Creation-Date: 2010-07-03 19:44+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -467,6 +467,20 @@ msgstr ""
 msgid "Color is reduced to black and white, "
 msgstr ""
 
+#: /home/strom/minimal/activities/Kandid.activity/ep_stamp_disk.py:144
+#, python-format
+msgid "dim out: %4.3f"
+msgstr ""
+
+#: /home/strom/minimal/activities/Kandid.activity/ep_stamp_disk.py:145
+#, python-format
+msgid "scale: %4.3f"
+msgstr ""
+
+#: /home/strom/minimal/activities/Kandid.activity/ep_stamp_disk.py:146
+msgid "Disk stamp: number of disks: "
+msgstr ""
+
 #: /home/strom/minimal/activities/Kandid.activity/ep_page_details.py:56
 msgid "Details"
 msgstr ""