roar/liboperators/OperatorRotate.py

39 lines
1.5 KiB
Python
Raw Normal View History

#!/usr/bin/env python3
#
# OperatorRotate.py
# Copyright (c) 2018, 2019 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#
from Operator import Operator
import math
class OperatorRotate(Operator):
name = "Rotate"
#
# apply2(self, mapPoint, mousePoint, regionOld, region)
def apply2(self, mapPoint, mousePoint, regionOld, region):
if self.originPoint == None:
self.originPoint = list(mousePoint)
delta = [b - a for a, b in zip(self.originPoint, mousePoint)]
radius = math.sqrt(math.pow(delta[0], 2) + math.pow(delta[1], 2))
if radius >= 10:
regionSize = (len(region[0]), len(region))
theta = math.atan2(-delta[1], delta[0]); cos, sin = math.cos(theta), math.sin(theta);
for numCol in range(regionSize[0]):
for numRow in range(regionSize[1]):
numRow_, numCol_ = (numRow / regionSize[1]) * 2 - 1, (numCol / regionSize[0]) * 2 - 1
b, a = (numCol_ * sin) + (numRow_ * cos), (numCol_ * cos) - (numRow_ * sin)
numRow_, numCol_ = int((b + 1) / 2 * regionSize[1]), int((a + 1) / 2 * regionSize[0])
if (numRow_ < regionSize[1]) and (numCol_ < regionSize[0]):
region[numRow][numCol] = list(regionOld[numRow_][numCol_])
return region
else:
return region
# __init__(self, *args): initialisation method
def __init__(self, *args):
self.originPoint = None
# vim:expandtab foldmethod=marker sw=4 ts=4 tw=120