Faster and better batch reproject

2.4.0

- changed: Batch reproject consider camera movement and is almost 8x faster
- added: Batch reproject have "Current" mode (using current tool setting)

utils.py

@@ -263,10 +263,12 @@ def remapping(value, leftMin, leftMax, rightMin, rightMax):
 ### GP funcs
 # -----------------
 
-def get_gp_draw_plane(context, obj=None):
+""" V1
+def get_gp_draw_plane(obj=None):
     ''' return tuple with plane coordinate and normal
     of the curent drawing accordign to geometry'''
 
+    context = bpy.context
     settings = context.scene.tool_settings
     orient = settings.gpencil_sculpt.lock_axis #'VIEW', 'AXIS_Y', 'AXIS_X', 'AXIS_Z', 'CURSOR'
     loc = settings.gpencil_stroke_placement_view3d #'ORIGIN', 'CURSOR', 'SURFACE', 'STROKE'
@@ -307,6 +309,46 @@ def get_gp_draw_plane(context, obj=None):
         plane_no.rotate(context.scene.cursor.matrix)
     
     return plane_co, plane_no
+"""
+
+## V2 
+def get_gp_draw_plane(obj=None, orient=None):
+    ''' return tuple with plane coordinate and normal
+    of the curent drawing according to geometry'''
+
+    if obj is None:
+        obj = bpy.context.object
+
+    settings = bpy.context.scene.tool_settings
+    if orient is None:
+        orient = settings.gpencil_sculpt.lock_axis #'VIEW', 'AXIS_Y', 'AXIS_X', 'AXIS_Z', 'CURSOR'
+    loc = settings.gpencil_stroke_placement_view3d #'ORIGIN', 'CURSOR', 'SURFACE', 'STROKE'
+    
+    mat = obj.matrix_world
+    plane_no = Vector((0.0, 0.0, 1.0))
+    plane_co = mat.to_translation()
+
+    # -> orientation
+    if orient == 'VIEW':
+        mat = bpy.context.scene.camera.matrix_world 
+    # -> placement
+    if loc == "CURSOR":
+        plane_co = bpy.context.scene.cursor.location
+        mat = bpy.context.scene.cursor.matrix
+
+    elif orient == 'AXIS_Y':#front (X-Z)
+        plane_no = Vector((0,1,0))
+
+    elif orient == 'AXIS_X':#side (Y-Z)
+        plane_no = Vector((1,0,0))
+
+    elif orient == 'AXIS_Z':#top (X-Y)
+        plane_no = Vector((0,0,1))
+
+    plane_no.rotate(mat)
+    
+    return plane_co, plane_no
+
 
 def check_angle_from_view(obj=None, plane_no=None, context=None):
     '''Return angle to obj according to chosen drawing axis'''
@@ -317,7 +359,7 @@ def check_angle_from_view(obj=None, plane_no=None, context=None):
         context = bpy.context
 
     if not plane_no:
-        _plane_co, plane_no = get_gp_draw_plane(context, obj=obj)
+        _plane_co, plane_no = get_gp_draw_plane(obj=obj)
     view_direction = view3d_utils.region_2d_to_vector_3d(context.region, context.region_data, (context.region.width/2.0, context.region.height/2.0))
 
     angle = math.degrees(view_direction.angle(plane_no))
@@ -498,6 +540,10 @@ from mathutils import Vector
 ### Vector utils 3d
 # -----------------
 
+def matrix_transform(coords, matrix):
+    coords_4d = np.column_stack((coords, np.ones(len(coords), dtype='float64')))
+    return np.einsum('ij,aj->ai', matrix, coords_4d)[:, :-1]
+
 def single_vector_length(v):
     return sqrt((v[0] * v[0]) + (v[1] * v[1]) + (v[2] * v[2]))