line mk3 with AB and OD modes

docs/nodes/generator/line_mk3.rst

@@ -0,0 +1,84 @@
+Line
+====
+
+Functionality
+-------------
+
+Line generator creates a series of connected segments based on the number of vertices and the length between them. Just a standard subdivided line along X axis
+
+Inputs
+------
+
+All parameters except **Center** are vectorized. They will accept single or multiple values.
+Both inputs will accept a single number or an array of them. It also will work an array of arrays::
+
+    [2]
+    [2, 4, 6]
+    [[2], [4]]
+
+Parameters
+----------
+
+All parameters except **Center** can be given by the node or an external input.
+
+
++---------------+---------------+--------------+---------------------------------------------------------+
+| Param         | Type          | Default      | Description                                             |
++===============+===============+==============+=========================================================+
+| **Direction** | Enum          | "X"          | Ortho direction, "from A to B" or "Origin and Direction"|
++---------------+---------------+--------------+---------------------------------------------------------+
+| **N Verts**   | Int           | 2            | number of vertices. The minimum is 2                    |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **Step**      | Float         | 1.00         | length between vertices                                 |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **Center**    | Boolean       | False        | center line around 0                                    |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **Normalize** | Boolean       | False        | determine steps by fixing total length line             |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **Size**      | Float         | 10           | total length of the segment                             |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **A, O**      | Vector        | (0,0,0)      | origin point of line                                    |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **B**         | Vector        | (0.5,0.5,0.5)| end point of line                                       |
++---------------+---------------+--------------+---------------------------------------------------------+
+| **D**         | Vector        | (1,1,1)      | direction of the line                                   |
++---------------+---------------+--------------+---------------------------------------------------------+
+
+Outputs
+-------
+
+**Vertices** and **Edges**. Verts and Edges will be generated. Depending on the inputs, the node will generate only one or multiples independent lines. See examples below.
+
+
+Example of usage
+----------------
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713459-a177d880-dc3a-11e8-935b-a2fa494dc49b.png
+  :alt: LineDemo1.PNG
+
+The first example shows just an standard line with 5 vertices and 1.00 ud between them
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713473-a9377d00-dc3a-11e8-94ab-39095761788c.png 
+  :alt: LineDemo2.PNG
+
+In this example the step is given by a series of numbers
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713477-ad639a80-dc3a-11e8-9884-6568326d2a33.png
+  :alt: LineDemo3.PNG  
+
+You can create multiple lines if input multiple lists  
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713487-b3597b80-dc3a-11e8-996b-17edf1cec9da.png
+  :alt: LineDemo4.PNG 
+
+The AB mode will output a divided segment for each vector pair, the step can be used to change the proportions of the divisions
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713488-b3597b80-dc3a-11e8-9e6e-f742d0338ba5.png
+  :alt: LineDemo5.PNG 
+
+The "OD" mode can be used to visualize normals 
+
+.. image:: https://user-images.githubusercontent.com/10011941/47713490-b3597b80-dc3a-11e8-9b6d-b937c0375ec5.png
+  :alt: LineDemo5.PNG
+
+Advanced example using the node to create a paraboloid grid 

index.md

@@ -10,7 +10,7 @@
 > Failing to follow these points will break the node category parser.
 
 ## Generator
-    SvLineNodeMK2
+    SvLineNodeMK3
     SvPlaneNodeMK2
     SvNGonNode
     SvBoxNode

json_examples/Architecture/ROADS_LARGE_nikitron_2014.json

@@ -659,7 +659,7 @@
       "width": 140.0
     },
     "Line MK2": {
-      "bl_idname": "SvLineNodeMK2",
+      "bl_idname": "SvLineNodeMK3",
       "color": [
         0.0,
         0.5,

json_examples/Design/lights_colors.json

@@ -40,7 +40,7 @@
       "width": 140.0
     },
     "Line MK2": {
-      "bl_idname": "SvLineNodeMK2",
+      "bl_idname": "SvLineNodeMK3",
       "color": [
         0.0,
         0.5,

json_examples/ParametricModelling/hilbert_to_circle.json

@@ -94,7 +94,7 @@
       "width": 140.0
     },
     "Line": {
-      "bl_idname": "SvLineNodeMK2",
+      "bl_idname": "SvLineNodeMK3",
       "color": [
         0.0,
         0.5,

json_examples/Shapes/bind_sections_shape.json

@@ -276,7 +276,7 @@
       "width": 391.4091796875
     },
     "Line MK2": {
-      "bl_idname": "SvLineNodeMK2",
+      "bl_idname": "SvLineNodeMK3",
       "color": [
         0.9200000166893005,
         0.9200000166893005,
@@ -297,7 +297,7 @@
       "width": 140.0
     },
     "Line MK2.001": {
-      "bl_idname": "SvLineNodeMK2",
+      "bl_idname": "SvLineNodeMK3",
       "color": [
         0.9200000166893005,
         0.9200000166893005,

nodes/generator/line_mk3.py

@@ -0,0 +1,240 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  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 2
+#  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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import bpy
+from bpy.props import IntProperty, FloatProperty, BoolProperty, EnumProperty, FloatVectorProperty
+from sverchok.node_tree import SverchCustomTreeNode
+from sverchok.data_structure import updateNode, fullList, match_long_repeat
+from sverchok.utils.modules.geom_utils import interp_v3_v3v3, normalize, add_v3_v3v3, sub_v3_v3v3
+
+directionItems = [
+    ("X",  "X",  "Along X axis",         0),
+    ("Y",  "Y",  "Along Y axis",         1),
+    ("Z",  "Z",  "Along Z axis",         2),
+    ("AB", "AB", "Between 2 points",     3),
+    ("OD", "OD", "Origin and Direction", 4),
+    ]
+
+
+def make_line(steps, center, direction, vert_a, vert_b):
+    if direction == "X":
+        vec = lambda l: (l, 0.0, 0.0)
+    elif direction == "Y":
+        vec = lambda l: (0.0, l, 0.0)
+    elif direction == "Z":
+        vec = lambda l: (0.0, 0.0, l)
+    elif direction in ["AB", "OD"]:
+        vec = lambda l: interp_v3_v3v3(vert_a, vert_b, l)
+
+    verts = []
+    add_vert = verts.append
+    x = -sum(steps) / 2 if center else 0
+    for s in [0.0] + steps:
+        x = x + s
+        add_vert(vec(x))
+    edges = [[i, i + 1] for i in range(len(steps))]
+    return verts, edges
+
+
+class SvLineNodeMK3(bpy.types.Node, SverchCustomTreeNode):
+    """
+    Triggers: Line, segment.
+    Tooltip: Generate line.
+    """
+    bl_idname = 'SvLineNodeMK3'
+    bl_label = 'Line'
+    bl_icon = 'GRIP'
+
+    def update_size_socket(self, context):
+        """ need to do UX transformation before updating node"""
+        size_socket = self.inputs["Size"]
+        size_socket.hide_safe = not self.normalize
+
+        updateNode(self, context)
+
+    def update_vect_socket(self, context):
+        """ need to do UX transformation before updating node"""
+        si = self.inputs
+        sd = self.direction
+        if sd == "OD" and not si[3].name[0] == "O":
+            si[3].name = "Origin"
+            si[4].name = "Direction"
+            si[3].prop_name = 'v3_origin'
+            si[4].prop_name = 'v3_dir'
+        elif sd == "AB" and not si[3].name[0] == "A":
+            si[3].name = "A"
+            si[4].name = "B"
+            si[3].prop_name = 'v3_input_0'
+            si[4].prop_name = 'v3_input_1'
+
+        ortho = sd not in ["AB", "OD"]
+        if (not ortho and si[3].hide_safe) or ortho:
+            si[3].hide_safe = ortho
+            si[4].hide_safe = ortho
+
+        updateNode(self, context)
+
+    direction = EnumProperty(
+        name="Direction", items=directionItems,
+        default="X", update=update_vect_socket)
+
+    num = IntProperty(
+        name='Num Verts', description='Number of Vertices',
+        default=2, min=2, update=updateNode)
+
+    step = FloatProperty(
+        name='Step', description='Step length',
+        default=1.0, update=updateNode)
+
+    center = BoolProperty(
+        name='Center', description='Center the line',
+        default=False, update=updateNode)
+
+    normalize = BoolProperty(
+        name='Normalize', description='Normalize line to size',
+        default=False, update=update_size_socket)
+
+    size = FloatProperty(
+        name='Size', description='Size of line',
+        default=10.0, update=updateNode)
+
+    v3_input_0 = FloatVectorProperty(
+        name='A', description='Starting point',
+        size=3, default=(0, 0, 0),
+        update=updateNode)
+
+    v3_input_1 = FloatVectorProperty(
+        name='B', description='End point',
+        size=3, default=(0.5, 0.5, 0.5),
+        update=updateNode)
+
+    v3_origin = FloatVectorProperty(
+        name='Origin', description='Origin of line',
+        size=3, default=(0, 0, 0),
+        update=updateNode)
+
+    v3_dir = FloatVectorProperty(
+        name='Direction', description='Direction',
+        size=3, default=(1, 1, 1),
+        update=updateNode)
+
+    def set_size_socket(self):
+        size_socket = self.inputs.new('StringsSocket', "Size")
+        size_socket.prop_name = 'size'
+        size_socket.hide_safe = not self.normalize
+
+    def set_vector_sockets(self):
+        si = self.inputs
+        si.new('VerticesSocket', "A").prop_name = 'v3_input_0'
+        si.new('VerticesSocket', "B").prop_name = 'v3_input_1'
+        si[3].hide_safe = self.direction not in ["AB", " OD"]
+        si[4].hide_safe = self.direction not in ["AB", " OD"]
+
+    def sv_init(self, context):
+        si = self.inputs
+        si.new('StringsSocket', "Num").prop_name = 'num'
+        si.new('StringsSocket', "Step").prop_name = 'step'
+        self.set_size_socket()
+        self.set_vector_sockets()
+        self.outputs.new('VerticesSocket', "Vertices", "Vertices")
+        self.outputs.new('StringsSocket', "Edges", "Edges")
+
+    def draw_buttons(self, context, layout):
+        col = layout.column(align=True)
+        row = col.row(align=True)
+        row.prop(self, "direction", expand=True)
+        row = col.row(align=True)
+        row.prop(self, "center", toggle=True)
+        row.prop(self, "normalize", toggle=True)
+
+    def get_data(self):
+        c, d = self.center, self.direction
+        input_num = self.inputs["Num"].sv_get()
+        input_step = self.inputs["Step"].sv_get()
+        normal_size = [2.0 if c else 1.0]
+
+        if self.normalize:
+
+            normal_size = self.inputs["Size"].sv_get()[0]
+
+        params = [input_num, input_step, normal_size]
+
+        if d in ["AB", "OD"]:
+            v_a = self.inputs[3].sv_get()[0]
+            v_b = self.inputs[4].sv_get()[0]
+            params.append(v_a)
+            params.append(v_b)
+
+        return match_long_repeat(params)
+
+    def define_steplist(self, step_list, s, n, nor, normal):
+
+        for num in n:
+            num = max(2, num)
+            s = s[:(num - 1)]  # shorten if needed
+            fullList(s, num - 1)  # extend if needed
+            step_list.append([S * nor / sum(s) for S in s] if normal else s)
+
+    def process_vectors(self, pts_list, d, va, vb):
+        if d == "AB" and self.normalize:
+            vb = add_v3_v3v3(normalize(sub_v3_v3v3(vb, va)), va) 
+        elif d == "OD":
+            vb = add_v3_v3v3(normalize(vb), va)
+        pts_list.append((va, vb))
+
+    def process(self):
+        if not any(s.is_linked for s in self.outputs):
+            return
+
+        c, d = self.center, self.direction
+        step_list = []
+        pts_list = []
+        verts_out, edges_out = [], []
+        normal = self.normalize or d == "AB"
+        advanced = d in ["AB", "OD"]
+        params = self.get_data()
+        if advanced:
+            for p in zip(*params):
+                n, s, nor, va, vb = p
+                self.define_steplist(step_list, s, n, nor, normal)
+                self.process_vectors(pts_list, d, va, vb)
+            for s, vc in zip(step_list, pts_list):
+                r1, r2 = make_line(s, c, d, vc[0], vc[1])
+                verts_out.append(r1)
+                edges_out.append(r2)
+        else:
+            for p in zip(*params):
+                n, s, nor = p
+                self.define_steplist(step_list, s, n, nor, normal)
+            for s in step_list:
+                r1, r2 = make_line(s, c, d, [], [])
+                verts_out.append(r1)
+                edges_out.append(r2)
+
+        if self.outputs['Vertices'].is_linked:
+            self.outputs['Vertices'].sv_set(verts_out)
+        if self.outputs['Edges'].is_linked:
+            self.outputs['Edges'].sv_set(edges_out)
+
+
+def register():
+    bpy.utils.register_class(SvLineNodeMK3)
+
+
+def unregister():
+    bpy.utils.unregister_class(SvLineNodeMK3)

nodes/generator/line_mk2.py → old_nodes/line_mk2.py

@@ -48,6 +48,8 @@ class SvLineNodeMK2(bpy.types.Node, SverchCustomTreeNode):
     bl_label = 'Line MK2'
     bl_icon = 'GRIP'
 
+    replacement_nodes = [('SvLineNodeMK3', None, None)]
+
     def upgrade_if_needed(self):
         """ This allows us to keep the node mk2 - on the fly node upgrade"""
         if "Size" not in self.inputs:

utils/modules/geom_utils.py

@@ -38,6 +38,9 @@ def normalize(v):
 def sub_v3_v3v3(a, b):
     return a[0]-b[0], a[1]-b[1], a[2]-b[2]
 
+def add_v3_v3v3(a, b):
+    return a[0]+b[0], a[1]+b[1], a[2]+b[2]
+
 def madd_v3_v3v3fl(a, b, f=1.0):
     return a[0]+b[0]*f, a[1]+b[1]*f, a[2]+b[2]*f