add tris to text coords

snippets/dev/dump_tris_to_text_coords.py

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+## Dump mesh triangles (tesselated) as flattened text coordinate
+
+import bpy
+from mathutils.geometry import tessellate_polygon
+# from pprint import pprint as pp
+
+
+def get_triangles_coords(obj, selected_only=False, apply_transforms=False):
+    '''return triangle coordinates as flattened list'''
+    dg = bpy.context.evaluated_depsgraph_get()
+    eval_ob = obj.evaluated_get(dg)
+    tris = []
+    for poly in eval_ob.data.polygons:
+        if selected_only and not poly.select:
+            continue
+        vertices = [eval_ob.data.vertices[i] for i in poly.vertices]
+        coords = [v.co for v in vertices]
+        if apply_transforms:
+            coords = [eval_ob.matrix_world @ co for co in coords]
+
+        ## Get indices of tesselated coords
+        for tri_idx in tessellate_polygon([coords]):
+            # Extend with tri coordinates
+            tris += [coords[i] for i in tri_idx]
+
+    # pp(tris)
+    return tris
+
+def dump_object_xy_tris(obj, coord_2d=True, as_vector=False, multiplier=None) -> str:
+    '''Get object tris as text, of 2D coordinates flatenned on XY
+    Can be used to get coordinate to trace from
+    '''
+    tris = get_triangles_coords(obj)
+
+    ## Multiply by a factor
+    if multiplier is not None:
+        tris = [co * mult for co in tris]
+
+    text = []
+    for i in range(0, len(tris)-1, 3):
+        ## Create text, convert int (equivalent to floor)
+        if coord_2d:
+            if as_vector:
+                text.append(f'Vector(({tris[i].x:.0f}, {tris[i].y:.0f})), Vector(({tris[i+1].x:.0f}, {tris[i+1].y:.0f})), Vector(({tris[i+2].x:.0f}, {tris[i+2].y:.0f})),')
+            else:
+                ## As Tuple
+                text.append(f'({tris[i].x:.0f}, {tris[i].y:.0f}), ({tris[i+1].x:.0f}, {tris[i+1].y:.0f}), ({tris[i+2].x:.0f}, {tris[i+2].y:.0f}),')
+        else:
+            if as_vector:
+                text.append(f'Vector(({tris[i].x:.0f}, {tris[i].y:.0f}, {tris[i].z:.0f})), Vector(({tris[i+1].x:.0f}, {tris[i+1].y:.0f}, {tris[i+1].z:.0f})), Vector(({tris[i+2].x:.0f}, {tris[i+2].y:.0f}, {tris[i+2].z:.0f})),')
+            else:
+                ## As Tuple
+                text.append(f'({tris[i].x:.0f}, {tris[i].y:.0f}, {tris[i].z:.0f}), ({tris[i+1].x:.0f}, {tris[i+1].y:.0f}, {tris[i+1].z:.0f}), ({tris[i+2].x:.0f}, {tris[i+2].y:.0f}, {tris[i+2].z:.0f}),')
+
+    ltext = '\n    '.join(text)
+    var_text = f'''{obj.name} = [
+    {ltext}
+]'''
+    return var_text
+
+## Pixel multiplier
+## At 10, one blender unit is 10px long
+mult = 10
+
+full = []
+for o in bpy.context.selected_objects:
+    if o.type != 'MESH':
+        continue
+    full.append(dump_object_xy_tris(o, coord_2d=True, multiplier=mult))
+
+bpy.context.window_manager.clipboard = '\n\n'.join(full)