Gambas Documentation - /comp/gb.opengl/gl/loadmatrixf

# Gl.LoadMatrixf (gb.opengl)

Static Sub LoadMatrixf ( Matrix As Float[] )

Replace the current matrix with the specified matrix.

### Parameters

m

  Specifies a pointer to 16 consecutive values, which are used as the elements of a 4 × 4 column-major matrix.

### Description

Gl.LoadMatrix replaces the current matrix with the one whose elements are specified by m. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see Gl.MatrixMode).

The current matrix, M, defines a transformation of coordinates. For instance, assume M refers to the modelview matrix. If v `` v ⁡ 0 v ⁡ 1 v ⁡ 2 v ⁡ 3 is the set of object coordinates of a vertex, and m points to an array of 16 single- or double-precision floating-point values m `` m ⁡ 0 m ⁡ 1 ... m ⁡ 15 , then the modelview transformation M ⁡ v does the following:

M ⁡ v `` m ⁡ 0 m ⁡ 4 m ⁡ 8 m ⁡ 12 m ⁡ 1 m ⁡ 5 m ⁡ 9 m ⁡ 13 m ⁡ 2 m ⁡ 6 m ⁡ 10 m ⁡ 14 m ⁡ 3 m ⁡ 7 m ⁡ 11 m ⁡ 15 × v ⁡ 0 v ⁡ 1 v ⁡ 2 v ⁡ 3

Projection and texture transformations are similarly defined.

### Notes

While the elements of the matrix may be specified with single or double precision, the GL implementation may store or operate on these values in less than single precision.

### Errors

Gl.INVALID_OPERATION is generated if Gl.LoadMatrix is executed between the execution of Gl.Begin and the corresponding execution of Gl.End.

### Associated Gets

Gl.Get with argument Gl.MATRIX_MODE

Gl.Get with argument Gl.COLOR_MATRIX

Gl.Get with argument Gl.MODELVIEW_MATRIX

Gl.Get with argument Gl.PROJECTION_MATRIX

Gl.Get with argument Gl.TEXTURE_MATRIX

### See also

- Gl.LoadIdentity,

- Gl.MatrixMode,

Gl.MultMatrix, Gl.MultTransposeMatrix,

- Gl.PushMatrix

See original documentation on OpenGL website