Animation: Blend To Ease Slider #110566
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@ -300,6 +300,7 @@ class GRAPH_MT_key_blending(Menu):
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layout.operator("graph.blend_to_default", text="Blend to Default Value")
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layout.operator("graph.ease", text="Ease")
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layout.operator("graph.blend_offset", text="Blend Offset")
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layout.operator("graph.blend_to_ease", text="Blend to Ease")
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class GRAPH_MT_key_smoothing(Menu):
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@ -704,6 +704,75 @@ void blend_offset_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const floa
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/* ---------------- */
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static float s_curve(float x, float slope, float width, float height, float xshift, float yshift)
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{
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/* Formula for 'S' curve we use for the "ease" sliders. The shift values move the curve verticaly
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* or horizontaly. The range of the curve used is from 0 to 1 on "x" and "y" so we can scale it
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* (width and height) and move it (xshift and y yshift) to crop the part of the curve we need.
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* Slope determins how curvy the shape is. */
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nathanvegdahl marked this conversation as resolved
Outdated
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float y = height * pow((x - xshift), slope) /
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(pow((x - xshift), slope) + pow((width - (x - xshift)), slope)) +
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yshift;
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/* The curve doesn't do what we want beyond our margins so we clamp the values. */
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nathanvegdahl marked this conversation as resolved
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Nathan Vegdahl
commented
Missing period. I also briefly found the use of the word "noise" here slightly confusing. Not a big deal at all, but maybe change it to something like "The curve doesn't do what we want beyond our margins...". Missing period. I also briefly found the use of the word "noise" here slightly confusing. Not a big deal at all, but maybe change it to something like "The curve doesn't do what we want beyond our margins...".
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if (x > xshift + width) {
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y = height + yshift;
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}
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else if (x < xshift) {
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y = yshift;
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nathanvegdahl marked this conversation as resolved
Outdated
Nathan Vegdahl
commented
Might make sense to move the declaration of Might make sense to move the declaration of `y_delta` inside the for loop below, closer to where it's used.
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}
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return y;
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}
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void blend_to_ease_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const float factor)
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{
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const BezTriple *left_key = fcurve_segment_start_get(fcu, segment->start_index);
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const BezTriple *right_key = fcurve_segment_end_get(fcu, segment->start_index + segment->length);
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const float key_x_range = right_key->vec[1][0] - left_key->vec[1][0];
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const float key_y_range = right_key->vec[1][1] - left_key->vec[1][1];
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/* Happens if there is only 1 key on the FCurve. Needs to be skipped because it
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* would be a divide by 0. */
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if (IS_EQF(key_x_range, 0.0f)) {
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return;
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}
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const float slope = 3.0;
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/* By doubling the size of the "S" curve we just one side of it, a "C" shape. */
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const float width = 2.0;
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const float height = 2.0;
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float xy_shift;
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/* Shifting the x and y values we can decide what side of the "S" shape to use. */
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if (factor > 0) {
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xy_shift = -1.0;
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}
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else {
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xy_shift = 0.0;
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}
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for (int i = segment->start_index; i < segment->start_index + segment->length; i++) {
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const float x = (fcu->bezt[i].vec[1][0] - left_key->vec[1][0]) / key_x_range;
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const float ease = s_curve(x, slope, width, height, xy_shift, xy_shift);
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const float base = left_key->vec[1][1] + key_y_range * ease;
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float y_delta;
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if (factor > 0) {
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y_delta = base - fcu->bezt[i].vec[1][1];
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}
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else {
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y_delta = fcu->bezt[i].vec[1][1] - base;
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}
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const float key_y_value = fcu->bezt[i].vec[1][1] + y_delta * factor;
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BKE_fcurve_keyframe_move_value_with_handles(&fcu->bezt[i], key_y_value);
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}
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}
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/* ---------------- */
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void breakdown_fcurve_segment(FCurve *fcu, FCurveSegment *segment, const float factor)
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{
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const BezTriple *left_bezt = fcurve_segment_start_get(fcu, segment->start_index);
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@ -466,6 +466,7 @@ void ease_fcurve_segment(FCurve *fcu, FCurveSegment *segment, float factor);
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* segment is aligned with the key before or after the segment.
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*/
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void blend_offset_fcurve_segment(FCurve *fcu, FCurveSegment *segment, float factor);
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void blend_to_ease_fcurve_segment(FCurve *fcu, FCurveSegment *segment, float factor);
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bool decimate_fcurve(bAnimListElem *ale, float remove_ratio, float error_sq_max);
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/**
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@ -120,6 +120,7 @@ void GRAPH_OT_blend_to_neighbor(struct wmOperatorType *ot);
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void GRAPH_OT_breakdown(struct wmOperatorType *ot);
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void GRAPH_OT_ease(struct wmOperatorType *ot);
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void GRAPH_OT_blend_offset(struct wmOperatorType *ot);
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void GRAPH_OT_blend_to_ease(struct wmOperatorType *ot);
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void GRAPH_OT_decimate(struct wmOperatorType *ot);
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void GRAPH_OT_blend_to_default(struct wmOperatorType *ot);
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void GRAPH_OT_butterworth_smooth(struct wmOperatorType *ot);
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@ -470,6 +470,7 @@ void graphedit_operatortypes()
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WM_operatortype_append(GRAPH_OT_breakdown);
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WM_operatortype_append(GRAPH_OT_ease);
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WM_operatortype_append(GRAPH_OT_blend_offset);
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WM_operatortype_append(GRAPH_OT_blend_to_ease);
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WM_operatortype_append(GRAPH_OT_blend_to_default);
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WM_operatortype_append(GRAPH_OT_gaussian_smooth);
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WM_operatortype_append(GRAPH_OT_butterworth_smooth);
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@ -1074,6 +1074,98 @@ void GRAPH_OT_blend_offset(wmOperatorType *ot)
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1.0f);
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}
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/* -------------------------------------------------------------------- */
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/** \name Blend to Ease Operator
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* \{ */
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static void blend_to_ease_graph_keys(bAnimContext *ac, const float factor)
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{
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apply_fcu_segment_function(ac, factor, blend_to_ease_fcurve_segment);
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}
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static void blend_to_ease_draw_status_header(bContext *C, tGraphSliderOp *gso)
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{
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common_draw_status_header(C, gso, "Blend to Ease Keys");
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}
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static void blend_to_ease_modal_update(bContext *C, wmOperator *op)
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{
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tGraphSliderOp *gso = static_cast<tGraphSliderOp *>(op->customdata);
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blend_to_ease_draw_status_header(C, gso);
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/* Reset keyframes to the state at invoke. */
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reset_bezts(gso);
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const float factor = slider_factor_get_and_remember(op);
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blend_to_ease_graph_keys(&gso->ac, factor);
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WM_event_add_notifier(C, NC_ANIMATION | ND_KEYFRAME | NA_EDITED, NULL);
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}
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static int blend_to_ease_invoke(bContext *C, wmOperator *op, const wmEvent *event)
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{
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const int invoke_result = graph_slider_invoke(C, op, event);
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if (invoke_result == OPERATOR_CANCELLED) {
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return invoke_result;
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}
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tGraphSliderOp *gso = static_cast<tGraphSliderOp *>(op->customdata);
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gso->modal_update = blend_to_ease_modal_update;
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gso->factor_prop = RNA_struct_find_property(op->ptr, "factor");
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blend_to_ease_draw_status_header(C, gso);
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ED_slider_allow_overshoot_set(gso->slider, false, false);
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ED_slider_factor_bounds_set(gso->slider, -1, 1);
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ED_slider_factor_set(gso->slider, 0.0f);
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return invoke_result;
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}
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static int blend_to_ease_exec(bContext *C, wmOperator *op)
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{
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bAnimContext ac;
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/* Get editor data. */
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if (ANIM_animdata_get_context(C, &ac) == 0) {
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return OPERATOR_CANCELLED;
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}
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const float factor = RNA_float_get(op->ptr, "factor");
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blend_to_ease_graph_keys(&ac, factor);
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/* Set notifier that keyframes have changed. */
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WM_event_add_notifier(C, NC_ANIMATION | ND_KEYFRAME | NA_EDITED, NULL);
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return OPERATOR_FINISHED;
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}
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void GRAPH_OT_blend_to_ease(wmOperatorType *ot)
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{
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/* Identifiers. */
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ot->name = "Blend to Ease Keyframes";
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ot->idname = "GRAPH_OT_blend_to_ease";
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ot->description = "Blends keyframes from current state to an ease-in or ease-out curve";
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/* API callbacks. */
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ot->invoke = blend_to_ease_invoke;
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ot->modal = graph_slider_modal;
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ot->exec = blend_to_ease_exec;
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ot->poll = graphop_editable_keyframes_poll;
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/* Flags. */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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RNA_def_float_factor(ot->srna,
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"factor",
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0.0f,
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-FLT_MAX,
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FLT_MAX,
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"Curve Bend",
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"Control the bend of the curve",
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-1.0f,
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1.0f);
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Gauss Smooth Operator
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Reference in New Issue
Missing period.