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Update affine_translate to support all axes.

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Arthur Moore 2024-04-17 22:09:04 -04:00
parent 20492634d8
commit ff3a325b37
1 changed files with 10 additions and 10 deletions
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20
generic-helpers.scad
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@ -103,14 +103,14 @@ function affine_rotate(angle_vector) =
_affine_rotate_z(angle_vector.z) * _affine_rotate_y(angle_vector.y) * _affine_rotate_x(angle_vector.x); _affine_rotate_z(angle_vector.z) * _affine_rotate_y(angle_vector.y) * _affine_rotate_x(angle_vector.x);
/** /**
* @brief Affine transformation matrix for 2d translation on the X,Y plane. * @brief Affine transformation matrix equivalent of `translate`
* @param vector 2d Vector to translate by. * @param vector @see `translate`
* @returns an Affine transformation matrix for use with `multmatrix()` * @returns An affine transformation matrix for use with `multmatrix()`
*/ */
function affine_translation(vector) = [ function affine_translate(vector) = [
[1, 0, 0, vector.y], [1, 0, 0, vector.x],
[0, 1, 0, 0], [0, 1, 0, vector.y],
[0, 0, 1, vector.x], [0, 0, 1, vector.z],
[0, 0, 0, 1] [0, 0, 0, 1]
]; ];
@ -136,12 +136,12 @@ module sweep_rounded(width=10, length=10) {
]; ];
// These contain the translations, but not the rotations // These contain the translations, but not the rotations
// OpenSCAD requires this hacky for loop to get accumulate to work! // OpenSCAD requires this hacky for loop to get accumulate to work!
first_translation = affine_translation(path_points[0]); first_translation = affine_translate([path_points[0].y, 0,path_points[0].x]);
affine_translations = concat([first_translation], [ affine_translations = concat([first_translation], [
for (i = 0, a = first_translation; for (i = 0, a = first_translation;
i < len(path_vectors); i < len(path_vectors);
a=a * affine_translation(path_vectors[i]), i=i+1) a=a * affine_translate([path_vectors[i].y, 0, path_vectors[i].x]), i=i+1)
a * affine_translation(path_vectors[i]) a * affine_translate([path_vectors[i].y, 0, path_vectors[i].x])
]); ]);
// Affine matrix to rotate around X axis // Affine matrix to rotate around X axis