76 lines
1.8 KiB
Python
76 lines
1.8 KiB
Python
from typing import Tuple, Optional
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# from pyglet.gl import gl
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from pyglet.math import Mat4, Vec3
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from pyglet.graphics import Group
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class GroupCamera(Group):
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"""
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A camera by group
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can be used by just added to your widget
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"""
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def __init__(
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self,
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window,
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order: int = 0,
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parent: Optional[Group] = None,
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view_x: Optional[int] = 0,
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view_y: Optional[int] = 0,
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zoom: Optional[float] = 1.0,
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min_zoom: Optional[float] = 1.0,
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max_zoom: Optional[float] = 1.0,
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):
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super().__init__(order=order, parent=parent)
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self._window = window
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self._previous_view = None
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self._view_x = view_x or 0
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self._view_y = view_y or 0
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self._zoom = zoom or 1.0
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self.min_zoom = min_zoom or 1.0
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self.max_zoom = max_zoom or 1.0
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@property
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def view_x(self) -> int:
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return self._view_x
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@view_x.setter
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def view_x(self, value: int):
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self._view_x = value
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@property
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def view_y(self) -> int:
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return self._view_y
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@view_y.setter
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def view_y(self, value: int):
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self._view_y = value
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@property
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def zoom(self) -> float:
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return min(max(self._zoom, self.min_zoom), self.max_zoom)
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@zoom.setter
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def zoom(self, value: float):
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self._zoom = value
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def reset(self):
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self._view_x = 0
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self._view_y = 0
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self.zoom = 1
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def set_state(self):
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self._previous_view = self._window.view
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view = Mat4.from_translation(Vec3(self._view_x, self._view_y, 0))
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if self._zoom == 1.0:
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self._window.view = view
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else:
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view = view.scale(Vec3(self._zoom, self._zoom, 1))
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self._window.view = view
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def unset_state(self):
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self._window.view = self._previous_view
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