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index 8b90ce034c3484e916be536adc7c308fa83177d6..02ca80b202c9da06a7c0eb2fb6993df81808114c 100644 (file)
* Released under GNU GPL, read the file 'COPYING' for more information
*/
-/*
- * TODO: Tue Oct 2 22:57:15 2001
- * - Decide control point behavior when use_calligraphic==1.
- * - Decide to use NORMALIZED_COORDINATE or not.
- * - Bug fix.
- */
-
#define noDYNA_DRAW_VERBOSE
#include "config.h"
#include "sp-item.h"
#define DDC_RED_RGBA 0xff0000ff
-#define DDC_GREEN_RGBA 0x000000ff
#define SAMPLE_TIMEOUT 10
#define TOLERANCE_LINE 1.0
@@ -77,17 +69,14 @@ static gint sp_dyna_draw_context_root_handler(SPEventContext *ec, GdkEvent *even
static void clear_current(SPDynaDrawContext *dc);
static void set_to_accumulated(SPDynaDrawContext *dc);
-static void concat_current_line(SPDynaDrawContext *dc);
static void accumulate_calligraphic(SPDynaDrawContext *dc);
static void fit_and_split(SPDynaDrawContext *ddc, gboolean release);
-static void fit_and_split_line(SPDynaDrawContext *ddc, gboolean release);
static void fit_and_split_calligraphics(SPDynaDrawContext *ddc, gboolean release);
static void sp_dyna_draw_reset(SPDynaDrawContext *ddc, NR::Point p);
static NR::Point sp_dyna_draw_get_npoint(SPDynaDrawContext const *ddc, NR::Point v);
static NR::Point sp_dyna_draw_get_vpoint(SPDynaDrawContext const *ddc, NR::Point n);
-static NR::Point sp_dyna_draw_get_curr_vpoint(SPDynaDrawContext const *ddc);
static void draw_temporary_box(SPDynaDrawContext *dc);
event_context->cursor_shape = cursor_calligraphy_xpm;
event_context->hot_x = 4;
event_context->hot_y = 4;
-
+
ddc->accumulated = NULL;
ddc->segments = NULL;
ddc->currentcurve = NULL;
/* attributes */
ddc->use_timeout = FALSE;
- ddc->use_calligraphic = TRUE;
ddc->timer_id = 0;
ddc->dragging = FALSE;
- ddc->dynahand = FALSE;
ddc->mass = 0.3;
ddc->drag = DRAG_DEFAULT;
ddc->cal1 = sp_curve_new_sized(32);
ddc->cal2 = sp_curve_new_sized(32);
- /* style should be changed when dc->use_calligraphc is touched */
ddc->currentshape = sp_canvas_item_new(SP_DT_SKETCH(ec->desktop), SP_TYPE_CANVAS_BPATH, NULL);
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(ddc->currentshape), DDC_RED_RGBA, SP_WIND_RULE_EVENODD);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(ddc->currentshape), 0x00000000, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_event_context_read(ec, "angle");
sp_event_context_read(ec, "width");
sp_event_context_read(ec, "thinning");
+ sp_event_context_read(ec, "tremor");
sp_event_context_read(ec, "flatness");
sp_event_context_read(ec, "usepressure");
sp_event_context_read(ec, "usetilt");
@@ -255,6 +242,9 @@ sp_dyna_draw_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
} else if (!strcmp(key, "thinning")) {
double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
ddc->vel_thin = CLAMP(dval, -1.0, 1.0);
+ } else if (!strcmp(key, "tremor")) {
+ double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
+ ddc->tremor = CLAMP(dval, 0.0, 1.0);
} else if (!strcmp(key, "flatness")) {
double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
ddc->flatness = CLAMP(dval, 0, 1.0);
return NR::Point(n[NR::X] * max + drect.min()[NR::X], n[NR::Y] * max + drect.min()[NR::Y]);
}
-/* Get current view point */
-static NR::Point sp_dyna_draw_get_curr_vpoint(SPDynaDrawContext const *dc)
-{
- NR::Rect drect = SP_EVENT_CONTEXT(dc)->desktop->get_display_area();
- double const max = MAX ( drect.dimensions()[NR::X], drect.dimensions()[NR::Y] );
- return NR::Point(dc->cur[NR::X] * max + drect.min()[NR::X], dc->cur[NR::Y] * max + drect.min()[NR::Y]);
-}
-
static void
sp_dyna_draw_reset(SPDynaDrawContext *dc, NR::Point p)
{
{
g_assert( dc->npoints >= 0 && dc->npoints < SAMPLING_SIZE );
- if (dc->use_calligraphic) {
- /* calligraphics */
-
- // How much velocity thins strokestyle
- double vel_thin = flerp (0, 160, dc->vel_thin);
-
- // Influence of pressure on thickness
- double pressure_thick = (dc->usepressure ? dc->pressure : 1.0);
+ // How much velocity thins strokestyle
+ double vel_thin = flerp (0, 160, dc->vel_thin);
+
+ // Influence of pressure on thickness
+ double pressure_thick = (dc->usepressure ? dc->pressure : 1.0);
+
+ double width = ( pressure_thick - vel_thin * NR::L2(dc->vel) ) * dc->width;
+
+ double tremble_left = 0, tremble_right = 0;
+ if (dc->tremor > 0) {
+ // obtain two normally distributed random variables, using polar Box-Muller transform
+ double x1, x2, w, y1, y2;
+ do {
+ x1 = 2.0 * g_random_double_range(0,1) - 1.0;
+ x2 = 2.0 * g_random_double_range(0,1) - 1.0;
+ w = x1 * x1 + x2 * x2;
+ } while ( w >= 1.0 );
+ w = sqrt( (-2.0 * log( w ) ) / w );
+ y1 = x1 * w;
+ y2 = x2 * w;
+
+ // deflect both left and right edges randomly and independently, so that:
+ // (1) dc->tremor=1 corresponds to sigma=1, decreasing dc->tremor narrows the bell curve;
+ // (2) deflection depends on width, but is upped for small widths for better visual uniformity across widths;
+ // (3) deflection somewhat depends on speed, to prevent fast strokes looking
+ // comparatively smooth and slow ones excessively jittery
+ tremble_left = (y1)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*NR::L2(dc->vel));
+ tremble_right = (y2)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*NR::L2(dc->vel));
+ }
- double width = ( pressure_thick - vel_thin * NR::L2(dc->vel) ) * dc->width;
- if ( width < 0.02 * dc->width ) {
- width = 0.02 * dc->width;
- }
+ if ( width < 0.02 * dc->width ) {
+ width = 0.02 * dc->width;
+ }
- NR::Point del = 0.05 * width * dc->ang;
+ NR::Point del_left = 0.05 * (width + tremble_left) * dc->ang;
+ NR::Point del_right = 0.05 * (width + tremble_right) * dc->ang;
- dc->point1[dc->npoints] = sp_dyna_draw_get_vpoint(dc, dc->cur + del);
- dc->point2[dc->npoints] = sp_dyna_draw_get_vpoint(dc, dc->cur - del);
+ dc->point1[dc->npoints] = sp_dyna_draw_get_vpoint(dc, dc->cur + del_left);
+ dc->point2[dc->npoints] = sp_dyna_draw_get_vpoint(dc, dc->cur - del_right);
- dc->del = del;
- } else {
- dc->point1[dc->npoints] = sp_dyna_draw_get_curr_vpoint(dc);
- }
+ dc->del = 0.5*(del_left + del_right);
dc->npoints++;
}
SPCanvas *canvas = SP_CANVAS(SP_DT_CANVAS(desktop));
dc->dragging = TRUE;
- dc->dynahand = TRUE;
int x, y;
gtk_widget_get_pointer(GTK_WIDGET(canvas), &x, &y);
if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
return TRUE;
}
-
+
NR::Point const button_w(event->button.x,
event->button.y);
NR::Point const button_dt(desktop->w2d(button_w));
? ( GDK_KEY_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON_PRESS_MASK )
- : ( GDK_KEY_PRESS_MASK |
+ : ( GDK_KEY_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_PRESS_MASK ) ),
case GDK_MOTION_NOTIFY:
if ( dc->is_drawing && !dc->use_timeout && ( event->motion.state & GDK_BUTTON1_MASK ) ) {
dc->dragging = TRUE;
- dc->dynahand = TRUE;
NR::Point const motion_w(event->motion.x,
event->motion.y);
if ( dc->dragging && event->button.button == 1 ) {
dc->dragging = FALSE;
- /* release */
- if (dc->dynahand) {
- dc->dynahand = FALSE;
- /* Remove all temporary line segments */
- while (dc->segments) {
- gtk_object_destroy(GTK_OBJECT(dc->segments->data));
- dc->segments = g_slist_remove(dc->segments, dc->segments->data);
- }
- /* Create object */
- fit_and_split(dc, TRUE);
- if (dc->use_calligraphic) {
- accumulate_calligraphic(dc);
- } else {
- concat_current_line(dc);
- }
- set_to_accumulated(dc); /* temporal implementation */
- if (dc->use_calligraphic /* || dc->cinside*/) {
- /* reset accumulated curve */
- sp_curve_reset(dc->accumulated);
- clear_current(dc);
- if (dc->repr) {
- dc->repr = NULL;
- }
- }
+ /* Remove all temporary line segments */
+ while (dc->segments) {
+ gtk_object_destroy(GTK_OBJECT(dc->segments->data));
+ dc->segments = g_slist_remove(dc->segments, dc->segments->data);
+ }
+ /* Create object */
+ fit_and_split(dc, TRUE);
+ accumulate_calligraphic(dc);
+ set_to_accumulated(dc); /* temporal implementation */
+ /* reset accumulated curve */
+ sp_curve_reset(dc->accumulated);
+ clear_current(dc);
+ if (dc->repr) {
+ dc->repr = NULL;
}
ret = TRUE;
}
case GDK_KP_Up:
if (!MOD__CTRL_ONLY) {
dc->angle += 5.0;
- if (dc->angle > 90.0)
+ if (dc->angle > 90.0)
dc->angle = 90.0;
sp_ddc_update_toolbox (desktop, "calligraphy-angle", dc->angle);
ret = TRUE;
case GDK_KP_Down:
if (!MOD__CTRL_ONLY) {
dc->angle -= 5.0;
- if (dc->angle < -90.0)
+ if (dc->angle < -90.0)
dc->angle = -90.0;
sp_ddc_update_toolbox (desktop, "calligraphy-angle", dc->angle);
ret = TRUE;
case GDK_KP_Right:
if (!MOD__CTRL_ONLY) {
dc->width += 0.01;
- if (dc->width > 1.0)
+ if (dc->width > 1.0)
dc->width = 1.0;
sp_ddc_update_toolbox (desktop, "altx-calligraphy", dc->width); // the same spinbutton is for alt+x
ret = TRUE;
case GDK_KP_Left:
if (!MOD__CTRL_ONLY) {
dc->width -= 0.01;
- if (dc->width < 0.01)
+ if (dc->width < 0.01)
dc->width = 0.01;
- sp_ddc_update_toolbox (desktop, "altx-calligraphy", dc->width);
+ sp_ddc_update_toolbox (desktop, "altx-calligraphy", dc->width);
ret = TRUE;
}
break;
sp_document_done(SP_DT_DOCUMENT(desktop));
}
-static void
-concat_current_line(SPDynaDrawContext *dc)
-{
- if (!sp_curve_empty(dc->currentcurve)) {
- NArtBpath *bpath;
- if (sp_curve_empty(dc->accumulated)) {
- bpath = sp_curve_first_bpath(dc->currentcurve);
- g_assert( bpath->code == NR_MOVETO_OPEN );
- sp_curve_moveto(dc->accumulated, bpath->x3, bpath->y3);
- }
- bpath = sp_curve_last_bpath(dc->currentcurve);
- if ( bpath->code == NR_CURVETO ) {
- sp_curve_curveto(dc->accumulated,
- bpath->x1, bpath->y1,
- bpath->x2, bpath->y2,
- bpath->x3, bpath->y3);
- } else if ( bpath->code == NR_LINETO ) {
- sp_curve_lineto(dc->accumulated, bpath->x3, bpath->y3);
- } else {
- g_assert_not_reached();
- }
- }
-}
-
static void
accumulate_calligraphic(SPDynaDrawContext *dc)
{
fit_and_split(SPDynaDrawContext *dc,
gboolean release)
{
- if (dc->use_calligraphic) {
- fit_and_split_calligraphics(dc, release);
- } else {
- fit_and_split_line(dc, release);
- }
+ fit_and_split_calligraphics(dc, release);
}
static double square(double const x)
return x * x;
}
-static void
-fit_and_split_line(SPDynaDrawContext *dc,
- gboolean release)
-{
- double const tolerance_sq = square( NR::expansion(SP_EVENT_CONTEXT(dc)->desktop->w2d()) * TOLERANCE_LINE );
-
- NR::Point b[4];
- double const n_segs = sp_bezier_fit_cubic(b, dc->point1, dc->npoints, tolerance_sq);
- if ( n_segs > 0
- && dc->npoints < SAMPLING_SIZE )
- {
- /* Fit and draw and reset state */
-#ifdef DYNA_DRAW_VERBOSE
- g_print("%d", dc->npoints);
-#endif
- sp_curve_reset(dc->currentcurve);
- sp_curve_moveto(dc->currentcurve, b[0]);
- sp_curve_curveto(dc->currentcurve, b[1], b[2], b[3]);
- sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->currentshape), dc->currentcurve);
- } else {
- /* Fit and draw and copy last point */
-#ifdef DYNA_DRAW_VERBOSE
- g_print("[%d]Yup\n", dc->npoints);
-#endif
- g_assert(!sp_curve_empty(dc->currentcurve));
- concat_current_line(dc);
-
- SPCanvasItem *cbp = sp_canvas_item_new(SP_DT_SKETCH(SP_EVENT_CONTEXT(dc)->desktop),
- SP_TYPE_CANVAS_BPATH,
- NULL);
- SPCurve *curve = sp_curve_copy(dc->currentcurve);
- sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cbp), curve);
- sp_curve_unref(curve);
- /* fixme: We have to parse style color somehow */
- sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cbp), DDC_GREEN_RGBA, SP_WIND_RULE_EVENODD);
- sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cbp), 0x000000ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
- /* fixme: Cannot we cascade it to root more clearly? */
- g_signal_connect(G_OBJECT(cbp), "event", G_CALLBACK(sp_desktop_root_handler), SP_EVENT_CONTEXT(dc)->desktop);
-
- dc->segments = g_slist_prepend(dc->segments, cbp);
- dc->point1[0] = dc->point1[dc->npoints - 2];
- dc->npoints = 1;
- }
-}
-
static void
fit_and_split_calligraphics(SPDynaDrawContext *dc, gboolean release)
{