# matrix_multiply

## Multiply two matrix arrays together.

### Syntax:

matrix_multiply(matrix1, matrix2)

Argument |
Description |

matrix1 |
The first matrix (as an array) to use. |

matrix2 |
The second matrix (as an array) to use. |

**Returns:** Array

### Description

With this function you can multiply two matrix arrays together
to create a new transform matrix. The function will return the new
matrix (again, as an array) which should be stored in a variable
for future use.

**NOTE:** You can't use a matrix constant as an argument with
tis function, so if you wish to multiply the (for example) view
matrix with a custom matrix that you have built, you must first
call `matrix_get(type)` and
assign the view matrix values to an array variable, then multiply
it by your custom matrix, and then set the chosen matrix (view,
projection or world).

### Example:

var v_matrix = matrix_get(matrix_view); var
new_matrix = matrix_multiply(v_matrix, my_matrix);
matrix_set(matrix_view, new_matrix);

The above code will get the current view matrix, then multiply
that with a custom matrix and then use the resulting matrix array
to set the view matrix again.

##### © Copyright YoYo Games Ltd. 2015 All Rights Reserved