BGE/Math/BGE/Math/Matrix44

Alias: BGE.Math.BGE.Math.Matrix44

Static Methods

create(values?: dynamic): dynamic

Parameters

• values (dynamic, optional, default: "invalid")

Returns

• dynamic

copy(mat: dynamic): dynamic

Parameters

• mat (dynamic)

Returns

• dynamic

setFrom(mat: dynamic, b: dynamic): dynamic

Parameters

• mat (dynamic)
• b (dynamic)

Returns

• dynamic

equals(mat: dynamic, b: dynamic): boolean

Parameters

• mat (dynamic)
• b (dynamic)

Returns

• boolean

multiply(mat: dynamic, operand: dynamic): dynamic

Parameters

• mat (dynamic)
• operand (dynamic)

Returns

• dynamic

transposed(mat: dynamic): dynamic

Returns the transposed version of this Matrix

Parameters

• mat (dynamic)

Returns

• dynamic

multVecMatrix( srcVect: BGE.Math.Vector, mat: dynamic, ): BGE.Math.Vector

The coordinate w more often than not equals 1, but it can be different than 1 especially when the matrix is projective matrix (perspective projection matrix).

Parameters

• srcVect (BGE.Math.Vector)
• mat (dynamic)

Returns

• BGE.Math.Vector

multDirMatrix( srcVect: BGE.Math.Vector, mat: dynamic, ): BGE.Math.Vector

This method needs to be used for vector-matrix multiplication. Look at the differences with the previous method (to compute a point-matrix multiplication). We don't use the coefficients in the matrix that account for translation (x[3][0], x[3][1], x[3][2]) and we don't compute w.

Parameters

• srcVect (BGE.Math.Vector)
• mat (dynamic)

Returns

• BGE.Math.Vector

inverse(mat: dynamic): dynamic

Compute the inverse of the matrix using the Gauss-Jordan (or reduced row) elimination method. We didn't explain in the lesson on Geometry how the inverse of matrix can be found. Don't worry at this point if you don't understand how this works. But we will need to be able to compute the inverse of matrices in the first lessons of the "Foundation of 3D Rendering" section, which is why we've added this code. For now, you can just use it and rely on it for doing what it's supposed to do. If you want to learn how this works though, check the lesson on called Matrix Inverse in the "Mathematics and Physics of Computer Graphics" section.

Parameters

• mat (dynamic)

Returns

• dynamic

invert(mat: dynamic): void

Set current matrix to its inverse

Parameters

• mat (dynamic)

Returns

• void

toStr(mat: dynamic): string

Parameters

• mat (dynamic)

Returns

• string