PIXI

Class: GroupD8

PIXI. GroupD8

new PIXI.GroupD8()

core/math/GroupD8.js, line 77

Implements Dihedral Group D_8, see group D4,
D8 is the same but with diagonals. Used for texture rotations.

Vector xX(i), xY(i) is U-axis of sprite with rotation i
Vector yY(i), yY(i) is V-axis of sprite with rotation i
Rotations: 0 grad (0), 90 grad (2), 180 grad (4), 270 grad (6)
Mirrors: vertical (8), main diagonal (10), horizontal (12), reverse diagonal (14)
This is the small part of gameofbombs.com portal system. It works.

Author:
  • Ivan @ivanpopelyshev

Methods

staticPIXI.GroupD8.byDirection(dx, dy){number}

core/math/GroupD8.js, line 129
Name Type Description
dx number

TODO
dy number

TODO
Returns:
Type Description
number TODO

staticPIXI.GroupD8.isSwapWidthHeight(rotation){boolean}

core/math/GroupD8.js, line 120

I dont know why sometimes width and heights needs to be swapped. We'll fix it later.

Name Type Description
rotation number

The number to check.
Returns:
Type Description
boolean Whether or not the width/height should be swapped.

staticPIXI.GroupD8.matrixAppendRotationInv(matrix, rotation, tx, ty)

core/math/GroupD8.js, line 175

Helps sprite to compensate texture packer rotation.

Name Type Description
matrix PIXI.Matrix

sprite world matrix
rotation number

The rotation factor to use.
tx number

sprite anchoring
ty number

sprite anchoring

staticPIXI.GroupD8.rotate180(rotation){number}

core/math/GroupD8.js, line 111

Adds 180 degrees to rotation. Commutative operation.

Name Type Description
rotation number

The number to rotate.
Returns:
Type Description
number rotated number