264 lines
7.2 KiB
Python
264 lines
7.2 KiB
Python
# -------------------------------
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# Difficult Rocket
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# Copyright © 2020-2023 by shenjackyuanjie 3695888@qq.com
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# All rights reserved
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# -------------------------------
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# Huge thanks to pyglet developers
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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 Camera:
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"""
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>>> from pyglet.window import Window
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>>> window = Window()
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>>> camera = Camera(window)
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>>> @window.event
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>>> def on_draw():
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>>> camera.begin()
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>>> window.clear()
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>>> camera.end()
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"""
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def __init__(self,
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window,
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zoom: Optional[float] = 1.0,
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dx: Optional[float] = 1.0,
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dy: Optional[float] = 1.0,
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min_zoom: Optional[float] = 1.0,
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max_zoom: Optional[float] = 1.0) -> None:
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self.window = window
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self.dx = dx
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self.dy = dy
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self.zoom = zoom
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self.min_zoom = min_zoom
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self.max_zoom = max_zoom
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self._stored_view = window.view
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@property
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def position(self) -> Tuple[float, float]:
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return self.dx, self.dy
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@position.setter
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def position(self, value: Tuple[float, float]):
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self.dx, self.dy = value
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@property
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def zoom_level(self) -> float:
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return self.zoom
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@zoom_level.setter
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def zoom_level(self, value: float) -> None:
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self.zoom = min(max(value, self.min_zoom), self.max_zoom)
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def begin(self) -> None:
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view = self.window.view
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self._stored_view = view
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x = self.window.width / self.zoom + (self.dx / self.zoom)
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y = self.window.height / self.zoom + (self.dy / self.zoom)
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view_matrix = view.translate((x * self.zoom, y * self.zoom, 0))
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view_matrix = view_matrix.scale((self.zoom, self.zoom, 1))
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self.window.view = view_matrix
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def end(self) -> None:
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self.window.view = self._stored_view
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def reset(self):
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self.zoom = 1
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self.dx = 0
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self.dy = 0
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def __enter__(self):
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self.begin()
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.end()
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class CenterCamera(Camera):
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"""
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A camera that centers the view in the center of the window
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>>> from pyglet.window import Window
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>>> window = Window()
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>>> camera = CenterCamera(window)
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>>> @window.event
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>>> def on_draw():
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>>> camera.begin()
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>>> window.clear()
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>>> camera.end()
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"""
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def begin(self) -> None:
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view = self.window.view
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self._stored_view = view
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x = self.window.width / 2.0 / self.zoom + (self.dx / self.zoom)
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y = self.window.height / 2.0 / self.zoom + (self.dy / self.zoom)
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view_matrix = view.translate((x * self.zoom, y * self.zoom, 0))
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view_matrix = view_matrix.scale((self.zoom, self.zoom, 1))
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self.window.view = view_matrix
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def end(self) -> None:
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self.window.view = self._stored_view
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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__(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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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
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self._view_y = view_y
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self._zoom = zoom
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self.min_zoom = min_zoom
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self.max_zoom = max_zoom
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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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class CenterGroupCamera(GroupCamera):
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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 set_state(self):
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self._previous_view = self._window.view
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x = (self._window.width / 2) / self._zoom + (self._view_x / self._zoom)
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y = (self._window.height / 2) / self._zoom + (self._view_y / self._zoom)
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view = Mat4.from_translation(Vec3(x * self._zoom, y * self._zoom, 0))
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# 不懂就问 为啥这里 * zoom 下面还 * zoom
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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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class CenterGroupFrame(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__(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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dx: Optional[int] = 0,
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dy: Optional[int] = 0,
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width: Optional[int] = 0,
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height: 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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super().__init__(order=order, parent=parent)
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self.window = window
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self.dx = dx
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self.dy = dy
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self._width = width
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self._height = height
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self._zoom = zoom
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self.min_zoom = min_zoom
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self.max_zoom = max_zoom
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@property
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def zoom(self) -> float:
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return self._zoom
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@zoom.setter
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def zoom(self, value: float):
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self._zoom = min(max(value, self.min_zoom), self.max_zoom)
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def set_state(self):
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self._previous_view = self.window.view
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gl.glScissor(int(self.dx), int(self.dy), int(self._width), int(self._height))
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gl.glViewport(int(self.dx), int(self.dy), int(self.window.width), int(self.window.height))
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gl.glEnable(gl.GL_SCISSOR_TEST)
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x = (self.window.width / 2) / self._zoom + (self.dx / self._zoom)
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y = (self.window.height / 2) / self._zoom + (self.dy / self._zoom)
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view = Mat4.from_translation(Vec3(x * self._zoom, y * self._zoom, 0))
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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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gl.glDisable(gl.GL_SCISSOR_TEST)
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gl.glViewport(0, 0, int(self.window.width), int(self.window.height))
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