1 files changed, 126 insertions, 0 deletions
diff --git a/uv_magic_uv/impl/texture_projection_impl.py b/uv_magic_uv/impl/texture_projection_impl.py
new file mode 100644
index 00000000..b64fa374
--- /dev/null
+++ b/uv_magic_uv/impl/texture_projection_impl.py
@@ -0,0 +1,126 @@
+# <pep8-80 compliant>
+
+# ##### 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 #####
+
+__author__ = "Nutti <nutti.metro@gmail.com>"
+__status__ = "production"
+__version__ = "5.2"
+__date__ = "17 Nov 2018"
+
+from collections import namedtuple
+
+import bpy
+import mathutils
+
+
+_Rect = namedtuple('Rect', 'x0 y0 x1 y1')
+_Rect2 = namedtuple('Rect2', 'x y width height')
+
+
+def get_loaded_texture_name(_, __):
+    items = [(key, key, "") for key in bpy.data.images.keys()]
+    items.append(("None", "None", ""))
+    return items
+
+
+def get_canvas(context, magnitude):
+    """
+    Get canvas to be renderred texture
+    """
+    sc = context.scene
+    prefs = context.user_preferences.addons["uv_magic_uv"].preferences
+
+    region_w = context.region.width
+    region_h = context.region.height
+    canvas_w = region_w - prefs.texture_projection_canvas_padding[0] * 2.0
+    canvas_h = region_h - prefs.texture_projection_canvas_padding[1] * 2.0
+
+    img = bpy.data.images[sc.muv_texture_projection_tex_image]
+    tex_w = img.size[0]
+    tex_h = img.size[1]
+
+    center_x = region_w * 0.5
+    center_y = region_h * 0.5
+
+    if sc.muv_texture_projection_adjust_window:
+        ratio_x = canvas_w / tex_w
+        ratio_y = canvas_h / tex_h
+        if sc.muv_texture_projection_apply_tex_aspect:
+            ratio = ratio_y if ratio_x > ratio_y else ratio_x
+            len_x = ratio * tex_w
+            len_y = ratio * tex_h
+        else:
+            len_x = canvas_w
+            len_y = canvas_h
+    else:
+        if sc.muv_texture_projection_apply_tex_aspect:
+            len_x = tex_w * magnitude
+            len_y = tex_h * magnitude
+        else:
+            len_x = region_w * magnitude
+            len_y = region_h * magnitude
+
+    x0 = int(center_x - len_x * 0.5)
+    y0 = int(center_y - len_y * 0.5)
+    x1 = int(center_x + len_x * 0.5)
+    y1 = int(center_y + len_y * 0.5)
+
+    return _Rect(x0, y0, x1, y1)
+
+
+def rect_to_rect2(rect):
+    """
+    Convert Rect1 to Rect2
+    """
+
+    return _Rect2(rect.x0, rect.y0, rect.x1 - rect.x0, rect.y1 - rect.y0)
+
+
+def region_to_canvas(rg_vec, canvas):
+    """
+    Convert screen region to canvas
+    """
+
+    cv_rect = rect_to_rect2(canvas)
+    cv_vec = mathutils.Vector()
+    cv_vec.x = (rg_vec.x - cv_rect.x) / cv_rect.width
+    cv_vec.y = (rg_vec.y - cv_rect.y) / cv_rect.height
+
+    return cv_vec
+
+
+def is_valid_context(context):
+    obj = context.object
+
+    # only edit mode is allowed to execute
+    if obj is None:
+        return False
+    if obj.type != 'MESH':
+        return False
+    if context.object.mode != 'EDIT':
+        return False
+
+    # only 'VIEW_3D' space is allowed to execute
+    for space in context.area.spaces:
+        if space.type == 'VIEW_3D':
+            break
+    else:
+        return False
+
+    return True