Mercurial > parpg-source
comparison grease/renderer/camera.py @ 5:bc88f7d5ca8b
Added base files for grease
| author | KarstenBock@gmx.net |
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| date | Tue, 12 Jul 2011 10:16:48 +0200 |
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| children |
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| 4:bf1dd9c24a7e | 5:bc88f7d5ca8b |
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| 1 import pyglet | |
| 2 | |
| 3 class Camera(object): | |
| 4 """Sets the point of view for further renderers by altering the | |
| 5 model/view matrix when it is drawn. It does not actually perform | |
| 6 any drawing itself. | |
| 7 | |
| 8 :param position: The position vector for the camera. Sets the center of the view. | |
| 9 :type position: Vec2d | |
| 10 :param angle: Camera rotation in degrees about the z-axis. | |
| 11 :type angle: float | |
| 12 :param zoom: Scaling vector for the coordinate axis. | |
| 13 :type zoom: Vec2d | |
| 14 :param relative: Flag to indicate if the camera settings are relative | |
| 15 to the previous view state. If ``False`` the view state is reset before | |
| 16 setting the camera view by loading the identity model/view matrix. | |
| 17 | |
| 18 At runtime the camera may be manipulated via attributes with the | |
| 19 same names and functions as the parameters above. | |
| 20 """ | |
| 21 | |
| 22 def __init__(self, position=None, angle=None, zoom=None, relative=False): | |
| 23 self.position = position | |
| 24 self.angle = angle | |
| 25 self.zoom = zoom | |
| 26 self.relative = relative | |
| 27 | |
| 28 def draw(self, gl=pyglet.gl): | |
| 29 if not self.relative: | |
| 30 gl.glLoadIdentity() | |
| 31 if self.position is not None: | |
| 32 px, py = self.position | |
| 33 gl.glTranslatef(px, py, 0) | |
| 34 if self.angle is not None: | |
| 35 gl.glRotatef(self.angle, 0, 0, 1) | |
| 36 if self.zoom is not None: | |
| 37 sx, sy = self.zoom | |
| 38 gl.glScalef(sx, sy ,0) | |
| 39 |