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| author | David Robillard <d@drobilla.net> | 2015-02-20 14:01:27 +0000 |
|---|---|---|
| committer | David Robillard <d@drobilla.net> | 2015-02-20 14:01:27 +0000 |
| commit | 0fae9e20897ec1efaf8ea2181f642835f6732506 (patch) | |
| tree | 76a3464acae34083b24b1c041373bf7fe3daca87 /src | |
| parent | 56cdcc7f886e9a4889f8f692c7863190705d9452 (diff) | |
| download | ganv-0fae9e20897ec1efaf8ea2181f642835f6732506.tar.gz ganv-0fae9e20897ec1efaf8ea2181f642835f6732506.tar.bz2 ganv-0fae9e20897ec1efaf8ea2181f642835f6732506.zip | |
Dampen sprung layout energy over time to prevent oscillation.
git-svn-id: http://svn.drobilla.net/lad/trunk/ganv@5588 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src')
| -rw-r--r-- | src/Canvas.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/Canvas.cpp b/src/Canvas.cpp index 3339e5d..695e3c3 100644 --- a/src/Canvas.cpp +++ b/src/Canvas.cpp @@ -249,6 +249,7 @@ struct GanvCanvasImpl { #ifdef GANV_FDGL this->layout_idle_id = 0; + this->layout_energy = 0.4; this->sprung_layout = FALSE; #endif @@ -449,6 +450,7 @@ struct GanvCanvasImpl { #ifdef GANV_FDGL guint layout_idle_id; + gdouble layout_energy; gboolean sprung_layout; #endif }; @@ -805,8 +807,7 @@ GanvCanvasImpl::layout_iteration() { if (_drag_state == EDGE) { return FALSE; // Canvas is locked, halt layout process - } - if (!sprung_layout) { + } else if (!sprung_layout) { return FALSE; // We shouldn't be running at all } @@ -917,8 +918,6 @@ GanvCanvasImpl::layout_calculate(double dur, bool update) GanvNode* const node = *i; - static const float damp = 0.3; // Velocity damping - if (node->impl->grabbed || (!node->impl->connected && !ganv_node_get_partner(node))) { node->impl->vel.x = 0.0; @@ -926,7 +925,7 @@ GanvCanvasImpl::layout_calculate(double dur, bool update) } else { node->impl->vel = vec_add(node->impl->vel, vec_mult(node->impl->force, dur)); - node->impl->vel = vec_mult(node->impl->vel, damp); + node->impl->vel = vec_mult(node->impl->vel, layout_energy); static const double MAX_VEL = 1000.0; static const double MIN_COORD = 4.0; @@ -972,6 +971,7 @@ GanvCanvasImpl::layout_calculate(double dur, bool update) } } + layout_energy *= 0.999; return n_moved > 0; } @@ -1982,6 +1982,7 @@ ganv_canvas_contents_changed(GanvCanvas* canvas) { #ifdef GANV_FDGL if (!canvas->impl->layout_idle_id && canvas->impl->sprung_layout) { + canvas->impl->layout_energy = 0.4; canvas->impl->layout_idle_id = g_timeout_add_full( G_PRIORITY_DEFAULT_IDLE, 33, |