Animation: blend offset slider #106518

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AresDeveaux wants to merge 12 commits from AresDeveaux/blender:blend_offset_slider into main

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1 changed files with 2 additions and 18 deletions
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@ -494,27 +494,11 @@ void ease_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const float factor
void blend_offset_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 right_x = right_key->vec[1][0];
const float right_y = right_key->vec[1][1];
const BezTriple *segment_first_key = fcurve_segment_start_get(fcu, segment->start_index + 1);

this can be simplified to fcu->bezt[segment->start_index]
same for getting the segment end

this can be simplified to `fcu->bezt[segment->start_index]` same for getting the segment end

Since ``y_delta * fabs(factor)` doesnt' change over the course of this loop, take it out of the loop:

const float weighted_delta = y_delta * fabs(factor);
Since ``y_delta * fabs(factor)` doesnt' change over the course of this loop, take it out of the loop: ```c const float weighted_delta = y_delta * fabs(factor); ```
const float segment_first_key_y = segment_first_key->vec[1][1];
const BezTriple *segment_last_key = fcurve_segment_end_get(
fcu, segment->start_index + segment->length - 1);
const float segment_last_key_y = segment_last_key->vec[1][1];
const float key_x_range = right_x - left_x;
/* 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;
}
/* The calculation needs diferent values for each side of the slider. */
const bool slider_right_side = factor > 0.5;
@ -526,10 +510,10 @@ void blend_offset_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const floa
float y_delta;
if (slider_right_side) {

if you use ED_slider_is_bidirectional_set you can just say factor > 0 and remove the boolean
That way this function doesn't even need to have an implicit notion of where the value came from

if you use `ED_slider_is_bidirectional_set` you can just say `factor > 0` and remove the boolean That way this function doesn't even need to have an implicit notion of where the value came from

I just tried this. One problem with a bidirectional slider is that the factor is always going to be more than zero, so the else part of the if statement is never executed. I still need to know what side of the slider the value is coming from. If the factor is from 0 to 1 I can, and by using ping_pong_factor = fabs(factor * 2 - 1) I have been simulating what now I should call "bidirectional_factor" instead of "ping_pong_factor"

If there is a way to know what side of the slider the value is coming from I could use ED_slider_is_bidirectional_set

I just tried this. One problem with a bidirectional slider is that the factor is always going to be more than zero, so the `else` part of the if statement is never executed. I still need to know what side of the slider the value is coming from. If the factor is from 0 to 1 I can, and by using `ping_pong_factor = fabs(factor * 2 - 1)` I have been simulating what now I should call "bidirectional_factor" instead of "ping_pong_factor" If there is a way to know what side of the slider the value is coming from I could use `ED_slider_is_bidirectional_set`

hm sorry I think that was my bad. I thought this would set the slider to a -1/1 range but it does not. It just allows negative values.
In that case your implementation is correct until we add that feature to the slider :)

hm sorry I think that was my bad. I thought this would set the slider to a -1/1 range but it does not. It just allows negative values. In that case your implementation is correct until we add that feature to the slider :)
y_delta = right_y - segment_last_key_y;
y_delta = right_key->vec[1][1] - segment_last_key->vec[1][1];
}
else {
y_delta = left_y - segment_first_key_y;
y_delta = left_key->vec[1][1] - segment_first_key->vec[1][1];
}
for (int i = segment->start_index; i < segment->start_index + segment->length; i++) {