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# ----------------------------------------------------------------------------
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# Copyright (c) 2008 Daniel Moisset, Ricardo Quesada, Rayentray Tappa, Lucio Torre
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# * Neither the name of cocos2d nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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Actions that moves the OpenGL camera.
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__docformat__ = 'restructuredtext'
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from cocos.director import director
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from cocos.euclid import *
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from base_actions import *
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__all__ = [ 'CameraException', # Camera Exceptions
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class CameraException( Exception ):
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class Camera3DAction( IntervalAction ):
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def init( self, duration=2):
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"""Initialize the Camera Action
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Number of seconds that the action will last
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self.duration = duration
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super(Camera3DAction, self).start()
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self.camera_eye_orig = self.target.camera.eye
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self.camera_center_orig = self.target.camera.center
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self.camera_up_orig = self.target.camera.up_vector
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# super(Camera3DAction, self).stop()
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# self.target.camera.eye = self.camera_eye_orig
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# self.target.camera.center = self.camera_center_orig
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# self.target.camera.up_vector = self.camera_up_orig
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def __reversed__( self ):
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return _ReverseTime( self )
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class OrbitCamera( Camera3DAction ):
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'''Orbits the camera around the center of the screen using spherical coordinates
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def init( self, radius=None, delta_radius=0, angle_z=None, delta_z=0, angle_x=None, delta_x=0, *args, **kw ):
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'''Initialize the camera with spherical coordinates
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Radius of the orbit. Default: current radius
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`delta_radius` : float
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Delta movement of the radius. Default: 0
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The zenith angle of the spherical coordinate in degrees. Default: current
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Relative movement of the zenith angle. Default: 0
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The azimuth angle of the spherical coordinate in degrees. Default: 0
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Relative movement of the azimuth angle. Default: 0
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For more information regarding spherical coordinates, read this:
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http://en.wikipedia.org/wiki/Spherical_coordinates
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super( OrbitCamera, self ).init( *args, **kw )
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width, height = director.get_window_size()
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self.delta_radius = delta_radius
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self.angle_x = angle_x
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self.rad_delta_x= math.radians( delta_x )
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self.angle_z = angle_z
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self.rad_delta_z = math.radians( delta_z )
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super(OrbitCamera,self).start()
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radius, zenith, azimuth = self.get_spherical_coords()
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if self.radius is None:
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if self.angle_z is None:
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self.angle_z= math.degrees(zenith)
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if self.angle_x is None:
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self.angle_x= math.degrees(azimuth)
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self.rad_x = math.radians( self.angle_x )
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self.rad_z = math.radians( self.angle_z )
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def get_spherical_coords( self ):
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'''returns the spherical coordinates from a cartesian coordinates
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- http://www.math.montana.edu/frankw/ccp/multiworld/multipleIVP/spherical/body.htm#converting
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:rtype: ( radius, zenith, azimuth )
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eye = self.target.camera.eye - self.target.camera.center
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radius = math.sqrt( pow(eye.x,2) + pow(eye.y,2) + pow(eye.z,2) )
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s = math.sqrt( pow(eye.x,2) + pow(eye.y,2) )
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angle_z = math.acos( eye.z / float(r) )
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angle_x = math.pi - math.asin( eye.y / s )
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angle_x = math.asin( eye.y / s )
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radius = radius / self.target.camera.get_z_eye()
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return radius, angle_z, angle_x
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def update( self, t ):
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r = (self.radius + self.delta_radius * t) * self.target.camera.get_z_eye()
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z_angle = self.rad_z + self.rad_delta_z * t
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x_angle = self.rad_x + self.rad_delta_x * t
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# using spherical coordinates
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p = Point3( math.sin(z_angle) * math.cos(x_angle),
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math.sin(z_angle) * math.sin(x_angle),
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d = p + self.camera_center_orig
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self.target.camera.eye = d
added
removed
cocos/actions/camera_actions.py
