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Posted on 2006-11-04

If I have 2 translation matrices.

Matrix A: Translates 2 units up the Y axis.

Matrix B: Translates 3 units up the Y axis, and 2 units up the X axis.

If I multiple these two matrices together, will the resulting matrix translate 5 units up the Y axis, and 2 units up the X axis?

That is my goal, and apparently I'm just enough years beyond Linear algebra to remember.

Thanks!

Matrix A: Translates 2 units up the Y axis.

Matrix B: Translates 3 units up the Y axis, and 2 units up the X axis.

If I multiple these two matrices together, will the resulting matrix translate 5 units up the Y axis, and 2 units up the X axis?

That is my goal, and apparently I'm just enough years beyond Linear algebra to remember.

Thanks!

3 Comments

http://www.euclideanspace.com/maths/geometry/affine/matrix4x4/index.htm

if you have a 3D vector for translating and rotating you must add one row to your matrix i will show you :

| X |

V = | Y |

| Z |

| 1 |

Translatin Matrix for translating a,b,c is :

Trans = | 1 0 0 a |

| 0 1 0 b |

| 0 0 1 c |

| 0 0 0 1 |

now if you Multiple your Vector to Trans Matrix the Result Matrix is :

New V = | X+a |

| Y+b |

| Z+c |

| 1 |

Now you Can Remove the added Row ..

is it you answer ?

and for Trans 2 o 3 o more time you just need to translate the result again and again ..

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