cocos.actions.basegrid_actions module

Grid Actions

Grid Actions

There are 2 kinds of grids:

• Grid3D : A 3D grid with x,y and z coordinates

• TiledGrid3DA 3D grid with x,y and z coordinates, composed

  with independent tiles

Hence, there are 2 kinds of grid actions:

• Grid3DAction

• TiledGrid3DAction

The Grid3DAction can modify any of vertex of the grid in any direction (x,y or z). The TiledGrid3DAction can modify any tile of the grid without modifying the adjacent tiles.

To understand visually the difference between these 2 kinds of grids, try these examples:

• run test/test_shakytiles3d.py to see a TiledGrid3DAction example

• run test/test_shaky3d.py to see the Grid3DAction counterpart

exception GridException

Bases: Exception

class AccelAmplitude(*args, **kwargs)

Bases: cocos.actions.base_actions.IntervalAction

Increases the waves amplitude from 0 to self.amplitude

Example:

# when t=0 the amplitude will be 0
# when t=1 the amplitude will be 40
action = AccelAmplitude( Wave3D( waves=4, amplitude=40, duration=6), rate=1.0 )
scene.do( action )

init(other, rate=1)

Init method.

Parameters

otherIntervalAction

The action that will be affected

ratefloat

The acceleration rate. 1 is linear (default value)

start()

External code sets self.target and then calls this method. Perform here any extra initialization needed.

update(t)

Gets called on every frame ‘t’ is the time elapsed normalized to [0, 1] If this action takes 5 seconds to execute, t will be equal to 0 at 0 seconds. t will be 0.5 at 2.5 seconds and t will be 1 at 5sec. This method must not use self._elapsed, which is not guaranted to be updated.

class AccelDeccelAmplitude(*args, **kwargs)

Bases: cocos.actions.base_actions.IntervalAction

Increases and Decreases the amplitude of Wave

Example:

# when t=0 and t=1 the amplitude will be 0
# when t=0.5 (half time), the amplitude will be 40
action = AccellDeccelAmplitude( Wave3D( waves=4, amplitude=40, duration=6) )
scene.do( action )

init(other, rate=1.0)

Init method.

Parameters

otherIntervalAction

The action that will be affected

ratefloat

The acceleration rate. 1 is linear (default value)

start()

External code sets self.target and then calls this method. Perform here any extra initialization needed.

update(t)

Gets called on every frame ‘t’ is the time elapsed normalized to [0, 1] If this action takes 5 seconds to execute, t will be equal to 0 at 0 seconds. t will be 0.5 at 2.5 seconds and t will be 1 at 5sec. This method must not use self._elapsed, which is not guaranted to be updated.

class DeccelAmplitude(*args, **kwargs)

Bases: cocos.actions.basegrid_actions.AccelAmplitude

Decreases the waves amplitude from self.amplitude to 0

Example:

# when t=1 the amplitude will be 0
# when t=0 the amplitude will be 40
action = DeccelAmplitude( Wave3D( waves=4, amplitude=40, duration=6), rate=1.0 )
scene.do( action )

update(t)

Gets called on every frame ‘t’ is the time elapsed normalized to [0, 1] If this action takes 5 seconds to execute, t will be equal to 0 at 0 seconds. t will be 0.5 at 2.5 seconds and t will be 1 at 5sec. This method must not use self._elapsed, which is not guaranted to be updated.

class Grid3DAction(*args, **kwargs)

Bases: cocos.actions.basegrid_actions.GridBaseAction

Action that does transformations to a 3D grid ( Grid3D )

get_grid()

get_original_vertex(x, y)

Get the original vertex coordinate. The original vertices are the ones weren’t modified by the current action.

Parameters

xint

x-vertex

yint

y-vertex

Return type

(float, float, float)

get_vertex(x, y)

Get the current vertex coordinate

Parameters

xint

x-vertex

yint

y-vertex

Return type

(float, float, float)

set_vertex(x, y, v)

Set a vertex point is a certain value

Parameters

xint

x-vertex

yint

y-vertex

v(float, float, float)

tuple value for the vertex

class GridBaseAction(*args, **kwargs)

Bases: cocos.actions.base_actions.IntervalAction

GridBaseAction is the base class of all Grid Actions.

init(grid=4, 4, duration=5)

Initialize the Grid Action

Parameters

grid(int,int)

Number of horizontal and vertical quads in the grid

durationint

Number of seconds that the action will last

start()

External code sets self.target and then calls this method. Perform here any extra initialization needed.

class ReuseGrid(*args, **kwargs)

Bases: cocos.actions.base_actions.InstantAction

Will reuse the current grid for the next grid action. The next grid action must have these properties:

• Be of the same class as the current one ( Grid3D or TiledGrid3D )

• Have the same size

If these condition are met, then the next grid action will receive as the original vertex or original tiles the current ones.

Example:

scene.do( Waves3D( duration=2) + ReuseGrid() + Lens3D(duration=2) )

init(reuse_times=1)

Parameters

reuse_timesint

Number of times that the current grid will be reused by Grid actions. Default: 1

start()

Here we must do out stuff

class StopGrid(*args, **kwargs)

Bases: cocos.actions.base_actions.InstantAction

StopGrid disables the current grid. Every grid action, after finishing, leaves the screen with a certain grid figure. This figure will be displayed until StopGrid or another Grid action is executed.

Example:

scene.do( Waves3D( duration=2) + StopGrid() )

start()

Here we must do out stuff

class TiledGrid3DAction(*args, **kwargs)

Bases: cocos.actions.basegrid_actions.GridBaseAction

Action that does transformations to a grid composed of tiles ( TiledGrid3D ). You can transform each tile individually

get_grid()

get_original_tile(x, y)

Get the 4-original tile coordinates.

Coordinates positions:

3 <-- 2
      ^
      |
0 --> 1

Parameters

xint

x coordinate of the tile

yint

y coordinate of the tile

Return type

[ float, float, float, float, float, float, float, float, float, float, float, float ]

Returns

The 4 coordinates with the following order: x0, y0, z0, x1, y1, z1,…,x3, y3, z3

get_tile(x, y)

Get the current tile coordinates.

Coordinates positions:

3 <-- 2
      ^
      |
0 --> 1

Parameters

xint

x coordinate of the tile

yint

y coordinate of the tile

Return type

[ float, float, float, float, float, float, float, float, float, float, float, float ]

Returns

The 4 coordinates with the following order: x0, y0, z0, x1, y1, z1,…,x3, y3, z3

set_tile(x, y, coords)

Set the 4 tile coordinates

Coordinates positions:

3 <-- 2
      ^
      |
0 --> 1

Parameters

xint

x coodinate of the tile

yint

y coordinate of the tile

coords[ float, float, float, float, float, float, float, float, float, float, float, float ]

The 4 coordinates in the format (x0, y0, z0, x1, y1, z1,…, x3, y3, z3)