/* helper func - just draw the F-Curve by sampling the visible region (for drawing curves with modifiers) */
static void draw_fcurve_curve(bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d, View2DGrid *grid)
{
ChannelDriver *driver;
float samplefreq, ctime;
float stime, etime;
float unitFac;
float dx, dy;
short mapping_flag = ANIM_get_normalization_flags(ac);
/* when opening a blend file on a different sized screen or while dragging the toolbar this can happen
* best just bail out in this case */
UI_view2d_grid_size(grid, &dx, &dy);
if (dx <= 0.0f)
return;
/* disable any drivers temporarily */
driver = fcu->driver;
fcu->driver = NULL;
/* compute unit correction factor */
unitFac = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag);
/* Note about sampling frequency:
* Ideally, this is chosen such that we have 1-2 pixels = 1 segment
* which means that our curves can be as smooth as possible. However,
* this does mean that curves may not be fully accurate (i.e. if they have
* sudden spikes which happen at the sampling point, we may have problems).
* Also, this may introduce lower performance on less densely detailed curves,'
* though it is impossible to predict this from the modifiers!
*
* If the automatically determined sampling frequency is likely to cause an infinite
* loop (i.e. too close to 0), then clamp it to a determined "safe" value. The value
* chosen here is just the coarsest value which still looks reasonable...
*/
/* grid->dx represents the number of 'frames' between gridlines, but we divide by U.v2d_min_gridsize to get pixels-steps */
/* TODO: perhaps we should have 1.0 frames as upper limit so that curves don't get too distorted? */
samplefreq = dx / (U.v2d_min_gridsize * U.pixelsize);
if (samplefreq < 0.00001f) samplefreq = 0.00001f;
/* the start/end times are simply the horizontal extents of the 'cur' rect */
stime = v2d->cur.xmin;
etime = v2d->cur.xmax + samplefreq; /* + samplefreq here so that last item gets included... */
/* at each sampling interval, add a new vertex
* - apply the unit correction factor to the calculated values so that
* the displayed values appear correctly in the viewport
*/
glBegin(GL_LINE_STRIP);
for (ctime = stime; ctime <= etime; ctime += samplefreq)
glVertex2f(ctime, evaluate_fcurve(fcu, ctime) * unitFac);
glEnd();
/* restore driver */
fcu->driver = driver;
}
/* This is called twice from space_graph.c -> graph_main_area_draw()
* Unselected then selected F-Curves are drawn so that they do not occlude each other.
*/
void graph_draw_curves(bAnimContext *ac, SpaceIpo *sipo, ARegion *ar, View2DGrid *grid, short sel)
{
ListBase anim_data = {NULL, NULL};
bAnimListElem *ale;
int filter;
/* build list of curves to draw */
filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE);
filter |= ((sel) ? (ANIMFILTER_SEL) : (ANIMFILTER_UNSEL));
ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
/* for each curve:
* draw curve, then handle-lines, and finally vertices in this order so that
* the data will be layered correctly
*/
for (ale = anim_data.first; ale; ale = ale->next) {
FCurve *fcu = (FCurve *)ale->key_data;
FModifier *fcm = find_active_fmodifier(&fcu->modifiers);
AnimData *adt = ANIM_nla_mapping_get(ac, ale);
/* map keyframes for drawing if scaled F-Curve */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 0, 0);
/* draw curve:
* - curve line may be result of one or more destructive modifiers or just the raw data,
* so we need to check which method should be used
* - controls from active modifier take precedence over keyframes
* (XXX! editing tools need to take this into account!)
*/
/* 1) draw curve line */
{
/* set color/drawing style for curve itself */
if (BKE_fcurve_is_protected(fcu)) {
/* protected curves (non editable) are drawn with dotted lines */
setlinestyle(2);
}
if (((fcu->grp) && (fcu->grp->flag & AGRP_MUTED)) || (fcu->flag & FCURVE_MUTED)) {
/* muted curves are drawn in a grayish hue */
/* XXX should we have some variations? */
UI_ThemeColorShade(TH_HEADER, 50);
}
else {
/* set whatever color the curve has set
* - unselected curves draw less opaque to help distinguish the selected ones
*/
glColor4f(fcu->color[0], fcu->color[1], fcu->color[2], fcurve_display_alpha(fcu));
}
/* draw active F-Curve thicker than the rest to make it stand out */
if (fcu->flag & FCURVE_ACTIVE) {
glLineWidth(2.0);
}
/* anti-aliased lines for less jagged appearance */
if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) glEnable(GL_LINE_SMOOTH);
glEnable(GL_BLEND);
/* draw F-Curve */
if ((fcu->modifiers.first) || (fcu->flag & FCURVE_INT_VALUES)) {
/* draw a curve affected by modifiers or only allowed to have integer values
* by sampling it at various small-intervals over the visible region
*/
draw_fcurve_curve(ac, ale->id, fcu, &ar->v2d, grid);
}
else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) {
/* just draw curve based on defined data (i.e. no modifiers) */
if (fcu->bezt)
//draw_fcurve_curve_bezts(ac, ale->id, fcu, &ar->v2d);
draw_fcurve_curve(ac, ale->id, fcu, &ar->v2d, grid); // XXX: better to do an optimised integration here instead, but for now, this works
else if (fcu->fpt)
draw_fcurve_curve_samples(ac, ale->id, fcu, &ar->v2d);
}
/* restore settings */
setlinestyle(0);
glLineWidth(1.0);
if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
/* 2) draw handles and vertices as appropriate based on active
* - if the option to only show controls if the F-Curve is selected is enabled, we must obey this
*/
if (!(sipo->flag & SIPO_SELCUVERTSONLY) || (fcu->flag & FCURVE_SELECTED)) {
if (fcurve_are_keyframes_usable(fcu) == 0) {
/* only draw controls if this is the active modifier */
if ((fcu->flag & FCURVE_ACTIVE) && (fcm)) {
switch (fcm->type) {
case FMODIFIER_TYPE_ENVELOPE: /* envelope */
draw_fcurve_modifier_controls_envelope(fcm, &ar->v2d);
break;
}
}
}
else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) {
short mapping_flag = ANIM_get_normalization_flags(ac);
float unit_scale = ANIM_unit_mapping_get_factor(ac->scene, ale->id, fcu, mapping_flag);
glPushMatrix();
glScalef(1.0f, unit_scale, 1.0f);
if (fcu->bezt) {
int do_handles = draw_fcurve_handles_check(sipo, fcu);
if (do_handles) {
/* only draw handles/vertices on keyframes */
glEnable(GL_BLEND);
draw_fcurve_handles(sipo, fcu);
glDisable(GL_BLEND);
}
draw_fcurve_vertices(sipo, ar, fcu, do_handles, (sipo->flag & SIPO_SELVHANDLESONLY), unit_scale);
}
else {
/* samples: only draw two indicators at either end as indicators */
draw_fcurve_samples(sipo, ar, fcu);
}
glPopMatrix();
}
}
/* 3) draw driver debugging stuff */
if ((ac->datatype == ANIMCONT_DRIVERS) && (fcu->flag & FCURVE_ACTIVE)) {
graph_draw_driver_debug(ac, ale->id, fcu);
}
/* undo mapping of keyframes for drawing if scaled F-Curve */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 1, 0);
}
/* free list of curves */
BLI_freelistN(&anim_data);
}
/* Draw indicators which show the value calculated from the driver,
* and how this is mapped to the value that comes out of it. This
* is handy for helping users better understand how to interpret
* the graphs, and also facilitates debugging.
*/
static void graph_draw_driver_debug(bAnimContext *ac, ID *id, FCurve *fcu)
{
ChannelDriver *driver = fcu->driver;
View2D *v2d = &ac->ar->v2d;
short mapping_flag = ANIM_get_normalization_flags(ac);
float unitfac = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag);
/* for now, only show when debugging driver... */
//if ((driver->flag & DRIVER_FLAG_SHOWDEBUG) == 0)
// return;
/* No curve to modify/visualise the result?
* => We still want to show the 1-1 default...
*/
if ((fcu->totvert == 0) && BLI_listbase_is_empty(&fcu->modifiers)) {
float t;
/* draw with thin dotted lines in style of what curve would have been */
glColor3fv(fcu->color);
setlinestyle(20);
glLineWidth(2.0f);
/* draw 1-1 line, stretching just past the screen limits
* NOTE: we need to scale the y-values to be valid for the units
*/
glBegin(GL_LINES);
t = v2d->cur.xmin;
glVertex2f(t, t * unitfac);
t = v2d->cur.xmax;
glVertex2f(t, t * unitfac);
glEnd();
/* cleanup line drawing */
setlinestyle(0);
glLineWidth(1.0f);
}
/* draw driver only if actually functional */
if ((driver->flag & DRIVER_FLAG_INVALID) == 0) {
/* grab "coordinates" for driver outputs */
float x = driver->curval;
float y = fcu->curval * unitfac;
/* only draw indicators if the point is in range*/
if (x >= v2d->cur.xmin) {
float co[2];
/* draw dotted lines leading towards this point from both axes ....... */
glColor3f(0.9f, 0.9f, 0.9f);
setlinestyle(5);
glBegin(GL_LINES);
/* x-axis lookup */
co[0] = x;
if (y >= v2d->cur.ymin) {
co[1] = v2d->cur.ymin - 1.0f;
glVertex2fv(co);
co[1] = y;
glVertex2fv(co);
}
/* y-axis lookup */
co[1] = y;
co[0] = v2d->cur.xmin - 1.0f;
glVertex2fv(co);
co[0] = x;
glVertex2fv(co);
glEnd();
setlinestyle(0);
/* x marks the spot .................................................... */
/* -> outer frame */
glColor3f(0.9f, 0.9f, 0.9f);
glPointSize(7.0);
glBegin(GL_POINTS);
glVertex2f(x, y);
glEnd();
/* inner frame */
glColor3f(0.9f, 0.0f, 0.0f);
glPointSize(3.0);
glBegin(GL_POINTS);
glVertex2f(x, y);
glEnd();
glPointSize(1.0f);
}
}
}
/* helper func - draw one repeat of an F-Curve */
static void draw_fcurve_curve_bezts(bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d)
{
BezTriple *prevbezt = fcu->bezt;
BezTriple *bezt = prevbezt + 1;
float v1[2], v2[2], v3[2], v4[2];
float *fp, data[120];
float fac = 0.0f;
int b = fcu->totvert - 1;
int resol;
float unit_scale;
short mapping_flag = ANIM_get_normalization_flags(ac);
/* apply unit mapping */
glPushMatrix();
unit_scale = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag);
glScalef(1.0f, unit_scale, 1.0f);
glBegin(GL_LINE_STRIP);
/* extrapolate to left? */
if (prevbezt->vec[1][0] > v2d->cur.xmin) {
/* left-side of view comes before first keyframe, so need to extend as not cyclic */
v1[0] = v2d->cur.xmin;
/* y-value depends on the interpolation */
if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (prevbezt->ipo == BEZT_IPO_CONST) || (fcu->totvert == 1)) {
/* just extend across the first keyframe's value */
v1[1] = prevbezt->vec[1][1];
}
else if (prevbezt->ipo == BEZT_IPO_LIN) {
/* extrapolate linear dosnt use the handle, use the next points center instead */
fac = (prevbezt->vec[1][0] - bezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]);
if (fac) fac = 1.0f / fac;
v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[1][1] - bezt->vec[1][1]);
}
else {
/* based on angle of handle 1 (relative to keyframe) */
fac = (prevbezt->vec[0][0] - prevbezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]);
if (fac) fac = 1.0f / fac;
v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[0][1] - prevbezt->vec[1][1]);
}
glVertex2fv(v1);
}
/* if only one keyframe, add it now */
if (fcu->totvert == 1) {
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
}
/* draw curve between first and last keyframe (if there are enough to do so) */
/* TODO: optimize this to not have to calc stuff out of view too? */
while (b--) {
if (prevbezt->ipo == BEZT_IPO_CONST) {
/* Constant-Interpolation: draw segment between previous keyframe and next, but holding same value */
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
v1[0] = bezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
}
else if (prevbezt->ipo == BEZT_IPO_LIN) {
/* Linear interpolation: just add one point (which should add a new line segment) */
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
}
else {
/* Bezier-Interpolation: draw curve as series of segments between keyframes
* - resol determines number of points to sample in between keyframes
*/
/* resol depends on distance between points (not just horizontal) OR is a fixed high res */
/* TODO: view scale should factor into this someday too... */
if (fcu->driver)
resol = 32;
else
resol = (int)(5.0f * len_v2v2(bezt->vec[1], prevbezt->vec[1]));
if (resol < 2) {
/* only draw one */
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
}
else {
/* clamp resolution to max of 32 */
/* NOTE: higher values will crash */
if (resol > 32) resol = 32;
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
v2[0] = prevbezt->vec[2][0];
v2[1] = prevbezt->vec[2][1];
v3[0] = bezt->vec[0][0];
v3[1] = bezt->vec[0][1];
v4[0] = bezt->vec[1][0];
v4[1] = bezt->vec[1][1];
correct_bezpart(v1, v2, v3, v4);
BKE_curve_forward_diff_bezier(v1[0], v2[0], v3[0], v4[0], data, resol, sizeof(float) * 3);
BKE_curve_forward_diff_bezier(v1[1], v2[1], v3[1], v4[1], data + 1, resol, sizeof(float) * 3);
for (fp = data; resol; resol--, fp += 3)
glVertex2fv(fp);
}
}
/* get next pointers */
prevbezt = bezt;
bezt++;
/* last point? */
if (b == 0) {
v1[0] = prevbezt->vec[1][0];
v1[1] = prevbezt->vec[1][1];
glVertex2fv(v1);
}
}
/* extrapolate to right? (see code for left-extrapolation above too) */
if (prevbezt->vec[1][0] < v2d->cur.xmax) {
v1[0] = v2d->cur.xmax;
/* y-value depends on the interpolation */
if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (prevbezt->ipo == BEZT_IPO_CONST) || (fcu->totvert == 1)) {
/* based on last keyframe's value */
v1[1] = prevbezt->vec[1][1];
}
else if (prevbezt->ipo == BEZT_IPO_LIN) {
/* extrapolate linear dosnt use the handle, use the previous points center instead */
bezt = prevbezt - 1;
fac = (prevbezt->vec[1][0] - bezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]);
if (fac) fac = 1.0f / fac;
v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[1][1] - bezt->vec[1][1]);
}
else {
/* based on angle of handle 1 (relative to keyframe) */
fac = (prevbezt->vec[2][0] - prevbezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]);
if (fac) fac = 1.0f / fac;
v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[2][1] - prevbezt->vec[1][1]);
}
glVertex2fv(v1);
}
glEnd();
glPopMatrix();
}
/* helper func - draw a samples-based F-Curve */
static void draw_fcurve_curve_samples(bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d)
{
FPoint *prevfpt = fcu->fpt;
FPoint *fpt = prevfpt + 1;
float fac, v[2];
int b = fcu->totvert - 1;
float unit_scale;
short mapping_flag = ANIM_get_normalization_flags(ac);
/* apply unit mapping */
glPushMatrix();
unit_scale = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag);
glScalef(1.0f, unit_scale, 1.0f);
glBegin(GL_LINE_STRIP);
/* extrapolate to left? - left-side of view comes before first keyframe? */
if (prevfpt->vec[0] > v2d->cur.xmin) {
v[0] = v2d->cur.xmin;
/* y-value depends on the interpolation */
if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (fcu->totvert == 1)) {
/* just extend across the first keyframe's value */
v[1] = prevfpt->vec[1];
}
else {
/* extrapolate linear doesn't use the handle, use the next points center instead */
fac = (prevfpt->vec[0] - fpt->vec[0]) / (prevfpt->vec[0] - v[0]);
if (fac) fac = 1.0f / fac;
v[1] = prevfpt->vec[1] - fac * (prevfpt->vec[1] - fpt->vec[1]);
}
glVertex2fv(v);
}
/* if only one sample, add it now */
if (fcu->totvert == 1)
glVertex2fv(prevfpt->vec);
/* loop over samples, drawing segments */
/* draw curve between first and last keyframe (if there are enough to do so) */
while (b--) {
/* Linear interpolation: just add one point (which should add a new line segment) */
glVertex2fv(prevfpt->vec);
/* get next pointers */
prevfpt = fpt;
fpt++;
/* last point? */
if (b == 0)
glVertex2fv(prevfpt->vec);
}
/* extrapolate to right? (see code for left-extrapolation above too) */
if (prevfpt->vec[0] < v2d->cur.xmax) {
v[0] = v2d->cur.xmax;
/* y-value depends on the interpolation */
if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (fcu->totvert == 1)) {
/* based on last keyframe's value */
v[1] = prevfpt->vec[1];
}
else {
/* extrapolate linear doesn't use the handle, use the previous points center instead */
fpt = prevfpt - 1;
fac = (prevfpt->vec[0] - fpt->vec[0]) / (prevfpt->vec[0] - v[0]);
if (fac) fac = 1.0f / fac;
v[1] = prevfpt->vec[1] - fac * (prevfpt->vec[1] - fpt->vec[1]);
}
glVertex2fv(v);
}
glEnd();
glPopMatrix();
}
/* Borderselect only selects keyframes now, as overshooting handles often get caught too,
* which means that they may be inadvertently moved as well. However, incl_handles overrides
* this, and allow handles to be considered independently too.
* Also, for convenience, handles should get same status as keyframe (if it was within bounds).
*/
static void borderselect_graphkeys(
bAnimContext *ac, const rctf *rectf_view, short mode, short selectmode, bool incl_handles,
struct KeyframeEdit_LassoData *data_lasso)
{
ListBase anim_data = {NULL, NULL};
bAnimListElem *ale;
int filter, mapping_flag;
SpaceIpo *sipo = (SpaceIpo *)ac->sl;
KeyframeEditData ked;
KeyframeEditFunc ok_cb, select_cb;
View2D *v2d = &ac->ar->v2d;
rctf rectf, scaled_rectf;
/* convert mouse coordinates to frame ranges and channel coordinates corrected for view pan/zoom */
UI_view2d_region_to_view_rctf(v2d, rectf_view, &rectf);
/* filter data */
filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE | ANIMFILTER_NODUPLIS);
ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
/* get beztriple editing/validation funcs */
select_cb = ANIM_editkeyframes_select(selectmode);
ok_cb = ANIM_editkeyframes_ok(mode);
/* init editing data */
memset(&ked, 0, sizeof(KeyframeEditData));
if (data_lasso) {
data_lasso->rectf_scaled = &scaled_rectf;
ked.data = data_lasso;
}
else {
ked.data = &scaled_rectf;
}
/* treat handles separately? */
if (incl_handles) {
ked.iterflags |= KEYFRAME_ITER_INCL_HANDLES;
mapping_flag = 0;
}
else
mapping_flag = ANIM_UNITCONV_ONLYKEYS;
mapping_flag |= ANIM_get_normalization_flags(ac);
/* loop over data, doing border select */
for (ale = anim_data.first; ale; ale = ale->next) {
AnimData *adt = ANIM_nla_mapping_get(ac, ale);
FCurve *fcu = (FCurve *)ale->key_data;
float unit_scale = ANIM_unit_mapping_get_factor(ac->scene, ale->id, fcu, mapping_flag);
/* apply NLA mapping to all the keyframes, since it's easier than trying to
* guess when a callback might use something different
*/
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 0, incl_handles == 0);
scaled_rectf.xmin = rectf.xmin;
scaled_rectf.xmax = rectf.xmax;
scaled_rectf.ymin = rectf.ymin / unit_scale;
scaled_rectf.ymax = rectf.ymax / unit_scale;
/* set horizontal range (if applicable)
* NOTE: these values are only used for x-range and y-range but not region
* (which uses ked.data, i.e. rectf)
*/
if (mode != BEZT_OK_VALUERANGE) {
ked.f1 = rectf.xmin;
ked.f2 = rectf.xmax;
}
else {
ked.f1 = rectf.ymin;
ked.f2 = rectf.ymax;
}
/* firstly, check if any keyframes will be hit by this */
if (ANIM_fcurve_keyframes_loop(&ked, fcu, NULL, ok_cb, NULL)) {
/* select keyframes that are in the appropriate places */
ANIM_fcurve_keyframes_loop(&ked, fcu, ok_cb, select_cb, NULL);
/* only change selection of channel when the visibility of keyframes doesn't depend on this */
if ((sipo->flag & SIPO_SELCUVERTSONLY) == 0) {
/* select the curve too now that curve will be touched */
if (selectmode == SELECT_ADD)
fcu->flag |= FCURVE_SELECTED;
}
}
/* un-apply NLA mapping from all the keyframes */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 1, incl_handles == 0);
}
/* cleanup */
BLI_freelistN(&anim_data);
}
/* helper for find_nearest_fcurve_vert() - build the list of nearest matches */
static void get_nearest_fcurve_verts_list(bAnimContext *ac, const int mval[2], ListBase *matches)
{
ListBase anim_data = {NULL, NULL};
bAnimListElem *ale;
int filter;
SpaceIpo *sipo = (SpaceIpo *)ac->sl;
View2D *v2d = &ac->ar->v2d;
short mapping_flag = 0;
/* get curves to search through
* - if the option to only show keyframes that belong to selected F-Curves is enabled,
* include the 'only selected' flag...
*/
filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE | ANIMFILTER_NODUPLIS);
if (sipo->flag & SIPO_SELCUVERTSONLY) // FIXME: this should really be check for by the filtering code...
filter |= ANIMFILTER_SEL;
mapping_flag |= ANIM_get_normalization_flags(ac);
ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
for (ale = anim_data.first; ale; ale = ale->next) {
FCurve *fcu = (FCurve *)ale->key_data;
AnimData *adt = ANIM_nla_mapping_get(ac, ale);
float unit_scale = ANIM_unit_mapping_get_factor(ac->scene, ale->id, fcu, mapping_flag);
/* apply NLA mapping to all the keyframes */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 0, 0);
if (fcu->bezt) {
BezTriple *bezt1 = fcu->bezt, *prevbezt = NULL;
int i;
for (i = 0; i < fcu->totvert; i++, prevbezt = bezt1, bezt1++) {
/* keyframe */
nearest_fcurve_vert_store(matches, v2d, fcu, bezt1, NULL, NEAREST_HANDLE_KEY, mval, unit_scale);
/* handles - only do them if they're visible */
if (fcurve_handle_sel_check(sipo, bezt1) && (fcu->totvert > 1)) {
/* first handle only visible if previous segment had handles */
if ((!prevbezt && (bezt1->ipo == BEZT_IPO_BEZ)) || (prevbezt && (prevbezt->ipo == BEZT_IPO_BEZ))) {
nearest_fcurve_vert_store(matches, v2d, fcu, bezt1, NULL, NEAREST_HANDLE_LEFT, mval, unit_scale);
}
/* second handle only visible if this segment is bezier */
if (bezt1->ipo == BEZT_IPO_BEZ) {
nearest_fcurve_vert_store(matches, v2d, fcu, bezt1, NULL, NEAREST_HANDLE_RIGHT, mval, unit_scale);
}
}
}
}
else if (fcu->fpt) {
// TODO; do this for samples too
}
/* un-apply NLA mapping from all the keyframes */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 1, 0);
}
/* free channels */
BLI_freelistN(&anim_data);
}
/* helper func - just draw the F-Curve by sampling the visible region (for drawing curves with modifiers) */
static void draw_fcurve_curve(bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d, View2DGrid *grid)
{
SpaceIpo *sipo = (SpaceIpo *)ac->sl;
ChannelDriver *driver;
float samplefreq;
float stime, etime;
float unitFac, offset;
float dx, dy;
short mapping_flag = ANIM_get_normalization_flags(ac);
int i, n;
/* when opening a blend file on a different sized screen or while dragging the toolbar this can happen
* best just bail out in this case */
UI_view2d_grid_size(grid, &dx, &dy);
if (dx <= 0.0f)
return;
/* disable any drivers temporarily */
driver = fcu->driver;
fcu->driver = NULL;
/* compute unit correction factor */
unitFac = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag, &offset);
/* Note about sampling frequency:
* Ideally, this is chosen such that we have 1-2 pixels = 1 segment
* which means that our curves can be as smooth as possible. However,
* this does mean that curves may not be fully accurate (i.e. if they have
* sudden spikes which happen at the sampling point, we may have problems).
* Also, this may introduce lower performance on less densely detailed curves,
* though it is impossible to predict this from the modifiers!
*
* If the automatically determined sampling frequency is likely to cause an infinite
* loop (i.e. too close to 0), then clamp it to a determined "safe" value. The value
* chosen here is just the coarsest value which still looks reasonable...
*/
/* grid->dx represents the number of 'frames' between gridlines, but we divide by U.v2d_min_gridsize to get pixels-steps */
/* TODO: perhaps we should have 1.0 frames as upper limit so that curves don't get too distorted? */
samplefreq = dx / (U.v2d_min_gridsize * U.pixelsize);
if (sipo->flag & SIPO_BEAUTYDRAW_OFF) {
/* Low Precision = coarse lower-bound clamping
*
* Although the "Beauty Draw" flag was originally for AA'd
* line drawing, the sampling rate here has a much greater
* impact on performance (e.g. for T40372)!
*
* This one still amounts to 10 sample-frames for each 1-frame interval
* which should be quite a decent approximation in many situations.
*/
if (samplefreq < 0.1f)
samplefreq = 0.1f;
}
else {
/* "Higher Precision" but slower - especially on larger windows (e.g. T40372) */
if (samplefreq < 0.00001f)
samplefreq = 0.00001f;
}
/* the start/end times are simply the horizontal extents of the 'cur' rect */
stime = v2d->cur.xmin;
etime = v2d->cur.xmax + samplefreq; /* + samplefreq here so that last item gets included... */
/* at each sampling interval, add a new vertex
* - apply the unit correction factor to the calculated values so that
* the displayed values appear correctly in the viewport
*/
glBegin(GL_LINE_STRIP);
n = (etime - stime) / samplefreq + 0.5f;
for (i = 0; i <= n; i++) {
float ctime = stime + i * samplefreq;
glVertex2f(ctime, (evaluate_fcurve(fcu, ctime) + offset) * unitFac);
}
glEnd();
/* restore driver */
fcu->driver = driver;
}