start pr for textrendering in idxviewer (#2535)

* start pr for textrendering in idxviewer * introduce space for parsing input text into usable form * sorry.. no this is not a priority * add comment for later * least invasive approach.. not optimal * small error fix * add custom elem+prolongue code... but might be stupid ... * untested autolengthen text items to match input verts * complete prelim text socket implementation

start pr for textrendering in idxviewer (#2535)
* start pr for textrendering in idxviewer * introduce space for parsing input text into usable form * sorry.. no this is not a priority * add comment for later * least invasive approach.. not optimal * small error fix * add custom elem+prolongue code... but might be stupid ... * untested autolengthen text items to match input verts * complete prelim text socket implementation
2febe9ed · Dealga McArdle · GitHub · 9f0d4322 · 2febe9ed · 2febe9ed
--- a/nodes/viz/viewer_idx28.py
+++ b/nodes/viz/viewer_idx28.py
@@ -87,6 +87,7 @@ class SvIDXViewer28(bpy.types.Node, SverchCustomTreeNode):
        inew('SvStringsSocket', 'edges')
        inew('SvStringsSocket', 'faces')
        inew('SvMatrixSocket', 'matrix')
+        inew('SvStringsSocket', 'text')


    def draw_buttons(self, context, layout):
@@ -187,7 +188,7 @@ class SvIDXViewer28(bpy.types.Node, SverchCustomTreeNode):
        inputs = self.inputs
        geom = lambda: None

-        for socket in ['matrix', 'verts', 'edges', 'faces']:
+        for socket in ['matrix', 'verts', 'edges', 'faces', 'text']:
            input_stream = inputs[socket].sv_get(default=[])
            if socket == 'verts' and input_stream:
                
@@ -212,16 +213,24 @@ class SvIDXViewer28(bpy.types.Node, SverchCustomTreeNode):
            display_topology.vert_data = []
            display_topology.edge_data = []
            display_topology.face_data = []
+            display_topology.text_data = []

            concat_vert = display_topology.vert_data.append
            concat_edge = display_topology.edge_data.append
            concat_face = display_topology.face_data.append
+            concat_text = display_topology.text_data.append
            
            for obj_index, final_verts in enumerate(geom.verts):

+                # can't display vert idx and text simultaneously - ...
                if self.display_vert_index:
                    for idx, vpos in enumerate(final_verts):
                        concat_vert((idx, vpos))
+                    if geom.text:
+                        
+                        text_items = self.get_text_of_correct_length(obj_index, geom, len(final_verts))                        
+                        for text_item, vpos in zip(text_items, final_verts):
+                            concat_text(text_item)

                if self.display_edge_index and obj_index < len(geom.edges):
                    for edge_index, (idx1, idx2) in enumerate(geom.edges[obj_index]):
@@ -236,6 +245,24 @@ class SvIDXViewer28(bpy.types.Node, SverchCustomTreeNode):

            return display_topology

+    def get_text_of_correct_length(self, obj_index, geom, num_elements_to_fill):
+        """ get text elements, and extend if needed"""
+        if obj_index < len(geom.text):
+            text_items = geom.text[obj_index]
+        else:
+            text_items = geom.text[len(geom.text)-1]
+
+        if not (len(text_items) == num_elements_to_fill):
+            
+            # ---- this doesn't touch the data, but returns a copy, or a modified copy -----
+            if len(text_items) < num_elements_to_fill:
+                return text_items + [text_items[-1], ] * (num_elements_to_fill - len(text_items))
+            else:
+                return text_items[:num_elements_to_fill]
+
+        return text_items
+
+ 
    def process(self):
        n_id = node_id(self)
        callback_disable(n_id)

--- a/utils/sv_idx_viewer28_draw.py
+++ b/utils/sv_idx_viewer28_draw.py
@@ -123,7 +123,7 @@ def draw_indices_2D(context, args):
        x = region_mid_width + region_mid_width * (vec_4d.x / vec_4d.w)
        y = region_mid_height + region_mid_height * (vec_4d.y / vec_4d.w)

-        # ''' draw text '''
+        # ---- draw text ----
        index_str = str(index)
        txt_width, txt_height = blf.dimensions(0, index_str)
        blf.position(0, x - (txt_width / 2), y - (txt_height / 2), 0)
@@ -132,8 +132,12 @@ def draw_indices_2D(context, args):
    if draw_bface:

        blf.color(font_id, *vert_idx_color)
-        for vidx in geom.vert_data:
-            draw_index(*vidx)
+        if geom.vert_data and geom.text_data:
+            for text_item, (idx, location) in zip(geom.text_data, geom.vert_data):
+                draw_index(text_item, location)
+        else:
+            for vidx in geom.vert_data:
+                draw_index(*vidx)
    
        blf.color(font_id, *edge_idx_color)
        for eidx in geom.edge_data: