diff options
| author | Yuval Peress <peress@chromium.org> | 2019-10-18 12:34:31 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-28 20:35:50 +0000 |
| commit | fde4f623b25973f124e9ca89698d5dce41993687 (patch) | |
| tree | 824f8abefbeb4d0408679693c0d43c136cec12d6 /common/vec3.c | |
| parent | 994af4a65fa7ece2f11f45038c75408d8166784a (diff) | |
| download | chrome-ec-fde4f623b25973f124e9ca89698d5dce41993687.tar.gz | |
common: vec3: Add init/sub/add functions
Add convinience functions for initializing, adding, and subtracting
vec3.
BUG=None
BRANCH=None
TEST=buildall
Change-Id: I594db350863a8199eade15a38deb6c223e2ae1ac
Signed-off-by: Yuval Peress <peress@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1869729
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Diffstat (limited to 'common/vec3.c')
| -rw-r--r-- | common/vec3.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/common/vec3.c b/common/vec3.c index 9a3561365a..29dc22f922 100644 --- a/common/vec3.c +++ b/common/vec3.c @@ -9,6 +9,13 @@ #include "vec3.h" #include "util.h" +void fpv3_init(fpv3_t v, fp_t x, fp_t y, fp_t z) +{ + v[X] = x; + v[Y] = y; + v[Z] = z; +} + void fpv3_scalar_mul(fpv3_t v, fp_t c) { v[X] = fp_mul(v[X], c); @@ -16,6 +23,20 @@ void fpv3_scalar_mul(fpv3_t v, fp_t c) v[Z] = fp_mul(v[Z], c); } +void fpv3_sub(fpv3_t out, const fpv3_t a, const fpv3_t b) +{ + out[X] = a[X] - b[X]; + out[Y] = a[Y] - b[Y]; + out[Z] = a[Z] - b[Z]; +} + +void fpv3_add(fpv3_t out, const fpv3_t a, const fpv3_t b) +{ + out[X] = a[X] + b[X]; + out[Y] = a[Y] + b[Y]; + out[Z] = a[Z] + b[Z]; +} + fp_t fpv3_dot(const fpv3_t v, const fpv3_t w) { return fp_mul(v[X], w[X]) + fp_mul(v[Y], w[Y]) + fp_mul(v[Z], w[Z]); |