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Implement snapping in the Curve editor

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Holding Ctrl will snap the selected point/tangent by increments
of 10% of the curve's width/height. Holding Shift as well will snap
by increments of 2.5% instead.
This commit is contained in:
Hugo Locurcio 2019-09-02 13:58:16 +02:00
parent 7e731bbce2
commit f07fc5b434
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GPG key ID: 39E8F8BE30B0A49C
1 changed files with 13 additions and 3 deletions
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16
editor/plugins/curve_editor_plugin.cpp
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@ -167,10 +167,20 @@ void CurveEditor::on_gui_input(const Ref<InputEvent> &p_event) {
_has_undo_data = true; _has_undo_data = true;
} }
const float curve_amplitude = curve.get_max_value() - curve.get_min_value();
// Snap to "round" coordinates when holding Ctrl.
// Be more precise when holding Shift as well.
float snap_threshold;
if (mm.get_control()) {
snap_threshold = mm.get_shift() ? 0.025 : 0.1;
} else {
snap_threshold = 0.0;
}
if (_selected_tangent == TANGENT_NONE) { if (_selected_tangent == TANGENT_NONE) {
// Drag point // Drag point
Vector2 point_pos = get_world_pos(mpos); Vector2 point_pos = get_world_pos(mpos).snapped(Vector2(snap_threshold, snap_threshold * curve_amplitude));
int i = curve.set_point_offset(_selected_point, point_pos.x); int i = curve.set_point_offset(_selected_point, point_pos.x);
// The index may change if the point is dragged across another one // The index may change if the point is dragged across another one
@ -188,8 +198,8 @@ void CurveEditor::on_gui_input(const Ref<InputEvent> &p_event) {
} else { } else {
// Drag tangent // Drag tangent
Vector2 point_pos = curve.get_point_position(_selected_point); const Vector2 point_pos = curve.get_point_position(_selected_point);
Vector2 control_pos = get_world_pos(mpos); const Vector2 control_pos = get_world_pos(mpos).snapped(Vector2(snap_threshold, snap_threshold * curve_amplitude));
Vector2 dir = (control_pos - point_pos).normalized(); Vector2 dir = (control_pos - point_pos).normalized();