def apply_angle_scale_trans(self, angle, scale, trans, point=Vector(0, 0)):
'''Update matrix transformation by adding new angle, scale and translate.
:Parameters:
`angle` : float
Rotation angle to add
`scale` : float
Scaling value to add
`trans` : Vector
Vector translation to add
`point` : Vector, default to (0, 0)
Point to apply transformation
'''
old_scale = self.scale
new_scale = old_scale * scale
if new_scale < self.scale_min or old_scale > self.scale_max:
scale = 1
t = translation_matrix((trans[0] * self._do_translation_x,
trans[1] * self._do_translation_y, 0))
t = matrix_multiply(t, translation_matrix((point[0], point[1], 0)))
t = matrix_multiply(t, rotation_matrix(angle, (0, 0, 1)))
t = matrix_multiply(t, scale_matrix(scale))
t = matrix_multiply(t, translation_matrix((-point[0], -point[1], 0)))
self.apply_transform(t)
self.dispatch_event('on_transform', None)
def apply_angle_scale_trans(self, angle, scale, trans, point=Vector(0, 0)):
'''Update matrix transformation by adding new angle, scale and translate.
:Parameters:
`angle` : float
Rotation angle to add
`scale` : float
Scaling value to add
`trans` : Vector
Vector translation to add
`point` : Vector, default to (0, 0)
Point to apply transformation
'''
old_scale = self.scale
new_scale = old_scale * scale
if new_scale < self.scale_min or old_scale > self.scale_max:
scale = 1
t = translation_matrix((trans[0]*self._do_translation_x, trans[1]*self._do_translation_y, 0))
t = matrix_multiply(t, translation_matrix( (point[0], point[1], 0)))
t = matrix_multiply(t, rotation_matrix(angle, (0, 0, 1)))
t = matrix_multiply(t, scale_matrix(scale))
t = matrix_multiply(t, translation_matrix((-point[0], -point[1], 0)))
self.apply_transform(t)
self.dispatch_event('on_transform', None)
def _set_pos(self, pos):
_pos = self.bbox[0]
if pos == _pos:
return
t = Vector(*pos) - _pos
trans = translation_matrix((t.x, t.y, 0))
self.apply_transform(trans)
def _set_pos(self, pos):
_pos = self.bbox[0]
if pos == _pos:
return
t = Vector(*pos) - _pos
trans = translation_matrix( (t.x, t.y, 0) )
self.apply_transform(trans)
def _apply_drag(self, touch):
#_last_touch_pos has last pos in correct parent space, just liek incoming touch
dx = (touch.x -
self._last_touch_pos[touch][0]) * self._do_translation_x
dy = (touch.y -
self._last_touch_pos[touch][1]) * self._do_translation_y
self.apply_transform(translation_matrix((dx, dy, 0)))
self.dispatch_event('on_transform', touch)
def apply_transform(self, trans, post_multiply=False, anchor=(0, 0)):
'''
Transforms scatter by trans (on top of its current transformation state)
:Parameters:
`trans`: transformation matrix from transformation lib.
Transformation to be applied to the scatter widget
`anchor`: tuple, default to (0, 0)
The point to use as the origin of the transformation
(uses local widget space)
`post_multiply`: bool, default to False
If true the transform matrix is post multiplied
(as if applied before the current transform)
'''
t = translation_matrix((anchor[0], anchor[1], 0))
t = matrix_multiply(t, trans)
t = matrix_multiply(t, translation_matrix((-anchor[0], -anchor[1], 0)))
if post_multiply:
self.transform = matrix_multiply(self._transform, t)
else:
self.transform = matrix_multiply(t, self._transform)
def apply_transform(self, trans, post_multiply=False, anchor=(0, 0)):
'''
Transforms scatter by trans (on top of its current transformation state)
:Parameters:
`trans`: transformation matrix from transformation lib.
Transformation to be applied to the scatter widget
`anchor`: tuple, default to (0, 0)
The point to use as the origin of the transformation
(uses local widget space)
`post_multiply`: bool, default to False
If true the transform matrix is post multiplied
(as if applied before the current transform)
'''
t = translation_matrix( (anchor[0], anchor[1], 0) )
t = matrix_multiply(t, trans)
t = matrix_multiply(t, translation_matrix( (-anchor[0], -anchor[1], 0) ))
if post_multiply:
self.transform = matrix_multiply(self._transform, t)
else:
self.transform = matrix_multiply(t, self._transform)
def _set_center(self, center):
if center == self.center:
return False
t = Vector(*center) - self.center
trans = translation_matrix((t.x, t.y, 0))
self.apply_transform(trans)
def _apply_drag(self, touch):
#_last_touch_pos has last pos in correct parent space, just liek incoming touch
dx = (touch.x - self._last_touch_pos[touch][0]) * self._do_translation_x
dy = (touch.y - self._last_touch_pos[touch][1]) * self._do_translation_y
self.apply_transform(translation_matrix((dx, dy, 0)))
self.dispatch_event('on_transform', touch)
def _set_center(self, center):
if center == self.center:
return False
t = Vector(*center) - self.center
trans = translation_matrix( (t.x, t.y, 0) )
self.apply_transform(trans)