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Animation: shear left slider #106521

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AresDeveaux wants to merge 9 commits from AresDeveaux/blender:shear_left_slider into main
pull from: AresDeveaux/blender:shear_left_slider
merge into: blender:main

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Conversation 10 Commits 9 Files Changed 6 +3 -12
1 changed files with 3 additions and 12 deletions
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15
source/blender/editors/animation/keyframes_general.c
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@ -494,26 +494,17 @@ void ease_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const float factor
void shear_left_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const float factor)
{
const BezTriple *left_key = fcurve_segment_start_get(fcu, segment->start_index);
const float left_x = left_key->vec[1][0];
const float left_y = left_key->vec[1][1];
const BezTriple *right_key = fcurve_segment_end_get(fcu, segment->start_index + segment->length);
const float key_x_range = right_key->vec[1][0] - left_x;
const float key_y_range = right_key->vec[1][1] - left_y;
/* Happens if there is only 1 key on the FCurve. Needs to be skipped because it
* would be a divide by 0. */
if (IS_EQF(key_x_range, 0.0f)) {
return;
}
const float key_x_range = right_key->vec[1][0] - left_key->vec[1][0];
const float key_y_range = right_key->vec[1][1] - left_key->vec[1][1];
/* The factor goes from 0 to 1, but for this tool it needs to go from -1 to 1. */
const float long_factor = factor * 2 - 1;
for (int i = segment->start_index; i < segment->start_index + segment->length; i++) {
/* For easy calculation of the curve, the values are normalized. */
const float normalized_x = (fcu->bezt[i].vec[1][0] - left_x) / key_x_range;
const float normalized_x = (fcu->bezt[i].vec[1][0] - left_key->vec[1][0]) / key_x_range;
const float lineal = key_y_range * normalized_x;