mesh_snap_utilities: don't initialize gpu and numpy at module level

2 files changed, 60 insertions, 12 deletions

diff --git a/mesh_snap_utilities_line/common_classes.py b/mesh_snap_utilities_line/common_classes.py
index b3465fae..1c6d75db 100644
--- a/mesh_snap_utilities_line/common_classes.py
+++ b/mesh_snap_utilities_line/common_classes.py
@@ -17,8 +17,6 @@
 
 import bpy
 import bgl
-import gpu
-import numpy as np
 
 from .common_utilities import snap_utilities
 
@@ -29,6 +27,8 @@ class SnapDrawn():
                  perpendicular_color, constrain_shift_color,
                  axis_x_color, axis_y_color, axis_z_color):
 
+        import gpu
+
         self.out_color = out_color
         self.face_color = face_color
         self.edge_color = edge_color
@@ -57,32 +57,53 @@ class SnapDrawn():
 
 
     def batch_line_strip_create(self, coords):
-        vbo = gpu.types.GPUVertBuf(self._format_pos, len = len(coords))
+        from gpu.types import (
+            GPUVertBuf,
+            GPUBatch,
+        )
+
+        vbo = GPUVertBuf(self._format_pos, len = len(coords))
         vbo.attr_fill(0, data = coords)
-        batch_lines = gpu.types.GPUBatch(type = "LINE_STRIP", buf = vbo)
+        batch_lines = GPUBatch(type = "LINE_STRIP", buf = vbo)
         return batch_lines
 
     def batch_lines_smooth_color_create(self, coords, colors):
-        vbo = gpu.types.GPUVertBuf(self._format_pos_and_color, len = len(coords))
+        from gpu.types import (
+            GPUVertBuf,
+            GPUBatch,
+        )
+
+        vbo = GPUVertBuf(self._format_pos_and_color, len = len(coords))
         vbo.attr_fill(0, data = coords)
         vbo.attr_fill(1, data = colors)
-        batch_lines = gpu.types.GPUBatch(type = "LINES", buf = vbo)
+        batch_lines = GPUBatch(type = "LINES", buf = vbo)
         return batch_lines
 
     def batch_triangles_create(self, coords):
-        vbo = gpu.types.GPUVertBuf(self._format_pos, len = len(coords))
+        from gpu.types import (
+            GPUVertBuf,
+            GPUBatch,
+        )
+
+        vbo = GPUVertBuf(self._format_pos, len = len(coords))
         vbo.attr_fill(0, data = coords)
-        batch_tris = gpu.types.GPUBatch(type = "TRIS", buf = vbo)
+        batch_tris = GPUBatch(type = "TRIS", buf = vbo)
         return batch_tris
 
     def batch_point_get(self):
         if self._batch_point is None:
-            vbo = gpu.types.GPUVertBuf(self._format_pos, len = 1)
+            from gpu.types import (
+                GPUVertBuf,
+                GPUBatch,
+            )
+            vbo = GPUVertBuf(self._format_pos, len = 1)
             vbo.attr_fill(0, ((0.0, 0.0, 0.0),))
-            self._batch_point = gpu.types.GPUBatch(type = "POINTS", buf = vbo)
+            self._batch_point = GPUBatch(type = "POINTS", buf = vbo)
         return self._batch_point
 
     def draw(self, type, location, list_verts_co, vector_constrain, prevloc):
+        import gpu
+
         # draw 3d point OpenGL in the 3D View
         bgl.glEnable(bgl.GL_BLEND)
         gpu.matrix.push()
@@ -150,6 +171,7 @@ class SnapDrawn():
         gpu.matrix.pop()
 
     def draw_elem(self, snap_obj, bm, elem):
+        import gpu
         from bmesh.types import(
             BMVert,
             BMEdge,
@@ -164,6 +186,8 @@ class SnapDrawn():
 
             if isinstance(elem, BMVert):
                 if elem.link_edges:
+                    import numpy as np
+
                     color = self.vert_color
                     edges = np.empty((len(elem.link_edges), 2), [("pos", "f4", 3), ("color", "f4", 4)])
                     edges["pos"][:, 0] = elem.co
diff --git a/mesh_snap_utilities_line/snap_context_l/mesh_drawing.py b/mesh_snap_utilities_line/snap_context_l/mesh_drawing.py
index 0b0b099c..76b9a1d4 100644
--- a/mesh_snap_utilities_line/snap_context_l/mesh_drawing.py
+++ b/mesh_snap_utilities_line/snap_context_l/mesh_drawing.py
@@ -18,9 +18,7 @@
 
 import bgl
 import bmesh
-import numpy as np
 from mathutils import Matrix
-import gpu
 
 def load_shader(shadername):
     from os import path
@@ -30,6 +28,8 @@ def load_shader(shadername):
 def get_mesh_vert_co_array(me):
     tot_vco = len(me.vertices)
     if tot_vco:
+        import numpy as np
+
         verts_co = np.empty(len(me.vertices) * 3, 'f4')
         me.vertices.foreach_get("co", verts_co)
         verts_co.shape = (-1, 3)
@@ -40,6 +40,8 @@ def get_mesh_vert_co_array(me):
 def get_bmesh_vert_co_array(bm):
     tot_vco = len(bm.verts)
     if tot_vco:
+        import numpy as np
+
         return np.array([v.co for v in bm.verts], 'f4')
     return None
 
@@ -48,6 +50,8 @@ def get_mesh_tri_verts_array(me):
     me.calc_loop_triangles()
     len_triangles = len(me.loop_triangles)
     if len_triangles:
+        import numpy as np
+
         tris = np.empty(len_triangles * 3, 'i4')
         me.loop_triangles.foreach_get("vertices", tris)
         tris.shape = (-1, 3)
@@ -56,6 +60,8 @@ def get_mesh_tri_verts_array(me):
 
 
 def get_bmesh_tri_verts_array(bm):
+    import numpy as np
+
     l_tri_layer = bm.faces.layers.int.get("l_tri")
     if l_tri_layer is None:
         l_tri_layer = bm.faces.layers.int.new("l_tri")
@@ -81,6 +87,8 @@ def get_bmesh_tri_verts_array(bm):
 def get_mesh_edge_verts_array(me):
     tot_edges = len(me.edges)
     if tot_edges:
+        import numpy as np
+
         edge_verts = np.empty(tot_edges * 2, 'i4')
         me.edges.foreach_get("vertices", edge_verts)
         edge_verts.shape = tot_edges, 2
@@ -92,11 +100,14 @@ def get_bmesh_edge_verts_array(bm):
     bm.edges.ensure_lookup_table()
     edges = [[e.verts[0].index, e.verts[1].index] for e in bm.edges if not e.hide]
     if edges:
+        import numpy as np
         return np.array(edges, 'i4')
     return None
 
 
 def get_mesh_loosevert_array(me, edges):
+    import numpy as np
+
     verts = np.arange(len(me.vertices))
 
     mask = np.in1d(verts, edges, invert=True)
@@ -110,6 +121,7 @@ def get_mesh_loosevert_array(me, edges):
 def get_bmesh_loosevert_array(bm):
     looseverts = [v.index for v in bm.verts if not (v.link_edges or v.hide)]
     if looseverts:
+        import numpy as np
         return np.array(looseverts, 'i4')
     return None
 
@@ -150,6 +162,8 @@ class _Mesh_Arrays():
 
 
         else: #TODO
+            import numpy as np
+
             self.verts_co = np.zeros((1,3), 'f4')
             self.looseverts = np.zeros(1, 'i4')
 
@@ -193,6 +207,7 @@ class GPU_Indices_Mesh():
             return
 
         import atexit
+        import gpu
 
         # Make sure we only registered the callback once.
         atexit.unregister(cls.end_opengl)
@@ -211,6 +226,7 @@ class GPU_Indices_Mesh():
 
     @staticmethod
     def set_ModelViewMatrix(MV):
+        import gpu
         gpu.matrix.load_matrix(MV)
 
 
@@ -242,6 +258,8 @@ class GPU_Indices_Mesh():
             update = True;
 
         if update:
+            import gpu
+
             self.draw_tris = draw_tris
             self.draw_edges = draw_edges
             self.draw_verts = draw_verts
@@ -378,6 +396,8 @@ class GPU_Indices_Mesh():
 
 
 def gpu_Indices_enable_state():
+    import gpu
+
     GPU_Indices_Mesh.init_opengl()
     gpu.matrix.push()
     gpu.matrix.push_projection()
@@ -386,6 +406,8 @@ def gpu_Indices_enable_state():
 
 
 def gpu_Indices_restore_state():
+    import gpu
+
     gpu.matrix.pop()
     gpu.matrix.pop_projection()
 
@@ -406,6 +428,8 @@ def gpu_Indices_use_clip_planes(rv3d, value):
 
 
 def gpu_Indices_set_ProjectionMatrix(P):
+    import gpu
+
     gpu.matrix.load_projection_matrix(P)
     GPU_Indices_Mesh.P[:] = P