Initial implementation of Gordon Surface node.

138d7de6 · Ilya Portnov · 164dc659 · 138d7de6 · 138d7de6
--- a/index.md
+++ b/index.md
@@ -133,6 +133,7 @@
    SvNurbsLoftNode
    SvNurbsSweepNode
    SvNurbsBirailNode
+    SvGordonSurfaceNode
    SvDeconstructSurfaceNode
    ---
    SvExQuadsToNurbsNode

--- a/nodes/surface/gordon_surface.py
+++ b/nodes/surface/gordon_surface.py
+# This file is part of project Sverchok. It's copyrighted by the contributors
+# recorded in the version control history of the file, available from
+# its original location https://github.com/nortikin/sverchok/commit/master
+#
+# SPDX-License-Identifier: GPL3
+# License-Filename: LICENSE
+import numpy as np
+import bpy
+from bpy.props import FloatProperty, EnumProperty, BoolProperty, IntProperty
+from sverchok.node_tree import SverchCustomTreeNode
+from sverchok.data_structure import updateNode, zip_long_repeat, ensure_nesting_level
+from sverchok.utils.math import supported_metrics
+from sverchok.utils.nurbs_common import SvNurbsMaths
+from sverchok.utils.curve.core import SvCurve
+from sverchok.utils.curve.nurbs import SvNurbsCurve
+from sverchok.utils.surface.gordon import gordon_surface
+class SvGordonSurfaceNode(bpy.types.Node, SverchCustomTreeNode):
+    """
+    Triggers: NURBS Gordon Surface Curves Net
+    Tooltip: Generate a NURBS surface from a net of curves (a.k.a. Gordon Surface)
+    """
+    bl_idname = 'SvGordonSurfaceNode'
+    bl_label = 'NURBS Surface from Curves Net'
+    bl_icon = 'GP_MULTIFRAME_EDITING'
+    metric: EnumProperty(name='Metric',
+        description = "Knot mode",
+        default="POINTS", items=supported_metrics,
+        update=updateNode)
+    def draw_buttons_ext(self, context, layout):
+        layout.prop(self, 'metric')
+    def sv_init(self, context):
+        self.inputs.new('SvCurveSocket', "CurvesU")
+        self.inputs.new('SvCurveSocket', "CurvesV")
+        self.inputs.new('SvVerticesSocket', "Intersections")
+        self.outputs.new('SvSurfaceSocket', "Surface")
+    def process(self):
+        if not any(socket.is_linked for socket in self.outputs):
+            return
+        u_curves_s = self.inputs['CurvesU'].sv_get()
+        v_curves_s = self.inputs['CurvesV'].sv_get()
+        intersections_s = self.inputs['Intersections'].sv_get()
+        u_curves_s = ensure_nesting_level(u_curves_s, 2, data_types=(SvCurve,))
+        v_curves_s = ensure_nesting_level(v_curves_s, 2, data_types=(SvCurve,))
+        intersections_s = ensure_nesting_level(intersections_s, 4)
+        surface_out = []
+        for u_curves, v_curves, intersections in zip_long_repeat(u_curves_s, v_curves_s, intersections_s):
+            u_curves = [SvNurbsCurve.to_nurbs(c) for c in u_curves]
+            if any(c is None for c in u_curves):
+                raise Exception("Some of U curves are not NURBS!")
+            v_curves = [SvNurbsCurve.to_nurbs(c) for c in v_curves]
+            if any(c is None for c in v_curves):
+                raise Exception("Some of V curves are not NURBS!")
+            _, _, _, surface = gordon_surface(u_curves, v_curves, intersections, metric=self.metric)
+            surface_out.append(surface)
+        self.outputs['Surface'].sv_set(surface_out)
+def register():
+    bpy.utils.register_class(SvGordonSurfaceNode)
+def unregister():
+    bpy.utils.unregister_class(SvGordonSurfaceNode)