Difference between revisions of "matrixMultiply"

From Bohemia Interactive Community
Jump to navigation Jump to search
m (Text replacement - "\|seealso= *\[\[([^ ]+)\]\], \[\[([^ ]+)\]\]" to "|seealso= $1 $2")
m (Text replacement - "\|seealso= *\[\[([^ ]+)\]\], \[\[([^ ]+)\]\]" to "|seealso= $1 $2")
Line 47: Line 47:
 
] */</code>
 
] */</code>
  
|seealso= [[matrixTranspose]] [[vectorAdd]] [[vectorMagnitude]] [[vectorNormalized]] [[vectorMultiply]] [[vectorDotProduct]] [[vectorCrossProduct]] [[vectorDistance]] [[vectorLinearConversion]] [[vectorCos]] [[vectorFromTo]] [[vectorModelToWorld]] [[vectorWorldToModel]], [[BIS_fnc_transformVectorDirAndUp]]
+
|seealso= [[matrixTranspose]] [[vectorAdd]] [[vectorMagnitude]] [[vectorNormalized]] [[vectorMultiply]] [[vectorDotProduct]] [[vectorCrossProduct]] [[vectorDistance]] [[vectorLinearConversion]] [[vectorCos]] [[vectorFromTo]] [[vectorModelToWorld]] [[vectorWorldToModel]] [[BIS_fnc_transformVectorDirAndUp]]
 
}}
 
}}
  

Revision as of 19:13, 20 January 2022

Hover & click on the images for description

Description

Description:
Returns resulting matrix from the multiplication of two matrices. First matrix must be of the size n ✕ k, while the second must be of the size k ✕ m, i.e columns matrix1 == rows matrix2. The resulting matrix will be of the size n ✕ m. If the shapes do not match, empty array [] will be returned.

matrixMultiply.jpg
Groups:
MathMath - Vectors

Syntax

Syntax:
matrix1 matrixMultiply matrix2
Parameters:
matrix1: Array - matrix of the size n(rows)k(columns)
matrix2: Array - matrix of the size k(rows)m(columns)
Return Value:
Array - resulting matrix of the size n(rows)m(columns)

Examples

Example 1:
[ [2], [2] ] matrixMultiply [ [3] ] /* returns [ [6], [6] ] */
Example 2:
[ [-1,0,0], [0,-1,0] ] matrixMultiply [ [1,2], [3,1], [2,3] ] /* returns [ [-1,-2], [-3,-1] ] */

Additional Information

See also:
matrixTranspose vectorAdd vectorMagnitude vectorNormalized vectorMultiply vectorDotProduct vectorCrossProduct vectorDistance vectorLinearConversion vectorCos vectorFromTo vectorModelToWorld vectorWorldToModel BIS_fnc_transformVectorDirAndUp

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Posted on 30 Jun, 2019
oOKexOo
Note that this command won't transform a 1D array automatically into a column vector [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [1,2,3] // wrong, syntax error [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [[1,2,3]] // wrong, will return [] [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [[1], [2], [3]] // correct, will return [[-1], [-2], [-3]]