RenderScript Matrix Functions

Computes 6 frustum planes from the view projection matrix

Returns true if the sphere is within the 6 frustum planes.

Returns one element of a matrix.

Warning: The order of the column and row parameters may be unexpected.

Returns true if the matrix was successfully inverted.

The matrix is first inverted then transposed. Returns true if the matrix was successfully inverted.

Set the elements of a matrix from an array of floats or from another matrix.

If loading from an array, the floats should be in row-major order, i.e. the element a row 0, column 0 should be first, followed by the element at row 0, column 1, etc.

If loading from a matrix and the source is smaller than the destination, the rest of the destination is filled with elements of the identity matrix. E.g. loading a rs_matrix2x2 into a rs_matrix4x4 will give:

Constructs a frustum projection matrix, transforming the box identified by the six clipping planes left, right, bottom, top, near, far.

To apply this projection to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

Set the elements of a matrix to the identity matrix.

Sets m to the matrix product of lhs * rhs.

To combine two 4x4 transformaton matrices, multiply the second transformation matrix by the first transformation matrix. E.g. to create a transformation matrix that applies the transformation s1 followed by s2, call rsMatrixLoadMultiply(&combined, &s2, &s1).

Warning: Prior to version 21, storing the result back into right matrix is not supported and will result in undefined behavior. Use rsMatrixMulitply instead. E.g. instead of doing rsMatrixLoadMultiply (&m2r, &m2r, &m2l), use rsMatrixMultiply (&m2r, &m2l). rsMatrixLoadMultiply (&m2l, &m2r, &m2l) works as expected.

Constructs an orthographic projection matrix, transforming the box identified by the six clipping planes left, right, bottom, top, near, far into a unit cube with a corner at (-1, -1, -1) and the opposite at (1, 1, 1).

To apply this projection to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

See https://en.wikipedia.org/wiki/Orthographic_projection .

Constructs a perspective projection matrix, assuming a symmetrical field of view.

To apply this projection to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

This function creates a rotation matrix. The axis of rotation is the (x, y, z) vector.

To rotate a vector, multiply the vector by the created matrix using rsMatrixMultiply().

See http://en.wikipedia.org/wiki/Rotation_matrix .

This function creates a scaling matrix, where each component of a vector is multiplied by a number. This number can be negative.

To scale a vector, multiply the vector by the created matrix using rsMatrixMultiply().

This function creates a translation matrix, where a number is added to each element of a vector.

To translate a vector, multiply the vector by the created matrix using rsMatrixMultiply().

For the matrix by matrix variant, sets m to the matrix product m * rhs.

When combining two 4x4 transformation matrices using this function, the resulting matrix will correspond to performing the rhs transformation first followed by the original m transformation.

For the matrix by vector variant, returns the post-multiplication of the vector by the matrix, ie. m * in.

When multiplying a float3 to a rs_matrix4x4, the vector is expanded with (1).

When multiplying a float2 to a rs_matrix4x4, the vector is expanded with (0, 1).

When multiplying a float2 to a rs_matrix3x3, the vector is expanded with (0).

Starting with API 14, this function takes a const matrix as the first argument.

Multiply the matrix m with a rotation matrix.

This function modifies a transformation matrix to first do a rotation. The axis of rotation is the (x, y, z) vector.

To apply this combined transformation to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

Multiply the matrix m with a scaling matrix.

This function modifies a transformation matrix to first do a scaling. When scaling, each component of a vector is multiplied by a number. This number can be negative.

To apply this combined transformation to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

Set an element of a matrix.

Warning: The order of the column and row parameters may be unexpected.

Multiply the matrix m with a translation matrix.

This function modifies a transformation matrix to first do a translation. When translating, a number is added to each component of a vector.

To apply this combined transformation to a vector, multiply the vector by the created matrix using rsMatrixMultiply().

Transpose the matrix m in place.