Add a scaling to a homogeneous 2D transformation matrix.
::hom_mat2d_scale adds a scaling by the scale factors Sx and Sy to a homogeneous 2D transformation matrix HomMat2D. The point (Px,Py) is the fixed point of the transformation. The resulting matrix is returned in HomMat2DScale.
|
HomMat2D (input_control) |
affine2d-array -> HTuple.double |
| Input transformation matrix. | |
| Number of elements: 6 | |
|
Sx (input_control) |
number -> HTuple.double / long |
| Scale factor along the x-axis. | |
| Default value: 2 | |
| Suggested values: 0.125, 0.25, 0.5, 1, 2, 4, 8, 16 | |
| Typical range of values: 0 <= Sx <= 1024 | |
| Minimum increment: 0.001 | |
|
Recommended increment: 0.125 | |
| Restriction: Sx != 0 | |
|
Sy (input_control) |
number -> HTuple.double / long |
| Scale factor along the y-axis. | |
| Default value: 2 | |
| Suggested values: 0.125, 0.25, 0.5, 1, 2, 4, 8, 16 | |
| Typical range of values: 0 <= Sy <= 1024 | |
| Minimum increment: 0.001 | |
|
Recommended increment: 0.125 | |
| Restriction: Sy != 0 | |
|
Px (input_control) |
point.x -> HTuple.double / long |
| Fixed point of the transformation (x coordinate). | |
| Default value: 0 | |
| Suggested values: 0, 16, 32, 64, 128, 256, 512, 1024 | |
| Typical range of values: 0 <= Px <= 1024 | |
| Minimum increment: 1 | |
|
Recommended increment: 10 | |
|
Py (input_control) |
point.y -> HTuple.double / long |
| Fixed point of the transformation (y coordinate). | |
| Default value: 0 | |
| Suggested values: 0, 16, 32, 64, 128, 256, 512, 1024 | |
| Typical range of values: 0 <= Py <= 1024 | |
| Minimum increment: 1 | |
|
Recommended increment: 10 | |
|
HomMat2DScale (output_control) |
affine2d-array -> HTuple.double * |
| Output transformation matrix. | |
| Number of elements: 6 | |
::hom_mat2d_scale returns H_MSG_TRUE if both scale factors are not 0.
::hom_mat2d_identity, ::hom_mat2d_translate, ::hom_mat2d_scale, ::hom_mat2d_rotate
::hom_mat2d_translate, ::hom_mat2d_scale, ::hom_mat2d_rotate
Basic operators
