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-rw-r--r--src/knot-holder-entity.cpp129
1 files changed, 73 insertions, 56 deletions
diff --git a/src/knot-holder-entity.cpp b/src/knot-holder-entity.cpp
index 6fcb26247..2d0d5eb02 100644
--- a/src/knot-holder-entity.cpp
+++ b/src/knot-holder-entity.cpp
@@ -135,16 +135,21 @@ KnotHolderEntity::snap_knot_position_constrained(Geom::Point const &p, Inkscape:
/* TODO: this pattern manipulation is not able to handle general transformation matrices. Only matrices that are the result of a pure scale times a pure rotation. */
-Geom::Point
-PatternKnotHolderEntityXY::knot_get()
+static gdouble sp_pattern_extract_theta(SPPattern *pat)
{
- SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
+ Geom::Matrix transf = pat->patternTransform;
+ return Geom::atan2(transf.xAxis());
+}
- gdouble x = 0;
- gdouble y = -pattern_height(pat);
+static Geom::Point sp_pattern_extract_scale(SPPattern *pat)
+{
+ Geom::Matrix transf = pat->patternTransform;
+ return Geom::Point( transf.expansionX(), transf.expansionY() );
+}
- Geom::Point delta = Geom::Point(x,y) * pat->patternTransform;
- return delta;
+static Geom::Point sp_pattern_extract_trans(SPPattern const *pat)
+{
+ return Geom::Point(pat->patternTransform[4], pat->patternTransform[5]);
}
void
@@ -164,8 +169,7 @@ PatternKnotHolderEntityXY::knot_set(Geom::Point const &p, Geom::Point const &ori
}
if (state) {
- Geom::Point knot_relpos(0, -pattern_height(pat));
- Geom::Point const q = p_snapped - (knot_relpos * pat->patternTransform);
+ Geom::Point const q = p_snapped - sp_pattern_extract_trans(pat);
sp_item_adjust_pattern(item, Geom::Matrix(Geom::Translate(q)));
}
@@ -173,14 +177,24 @@ PatternKnotHolderEntityXY::knot_set(Geom::Point const &p, Geom::Point const &ori
}
Geom::Point
+PatternKnotHolderEntityXY::knot_get()
+{
+ SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
+ return sp_pattern_extract_trans(pat);
+}
+
+Geom::Point
PatternKnotHolderEntityAngle::knot_get()
{
SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
- gdouble x = pattern_width(pat);
- gdouble y = -pattern_height(pat);
-
- Geom::Point delta = Geom::Point(x,y) * pat->patternTransform;
+ gdouble x = (pattern_width(pat));
+ gdouble y = 0;
+ Geom::Point delta = Geom::Point(x,y);
+ Geom::Point scale = sp_pattern_extract_scale(pat);
+ gdouble theta = sp_pattern_extract_theta(pat);
+ delta = delta * Geom::Matrix(Geom::Scale(scale))*Geom::Matrix(Geom::Rotate(theta));
+ delta = delta + sp_pattern_extract_trans(pat);
return delta;
}
@@ -192,38 +206,24 @@ PatternKnotHolderEntityAngle::knot_set(Geom::Point const &p, Geom::Point const &
SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
- // rotate pattern around XY knot position
- Geom::Point knot_relpos(pattern_width(pat), -pattern_height(pat));
- Geom::Point xy_knot_relpos(0, -pattern_height(pat));
- Geom::Point transform_origin = xy_knot_relpos * pat->patternTransform;
-
- Geom::Point oldp = (knot_relpos * pat->patternTransform) - transform_origin;
- Geom::Point newp = p - transform_origin;
-
- gdouble theta = Geom::angle_between(oldp, newp);
+ // get the angle from pattern 0,0 to the cursor pos
+ Geom::Point delta = p - sp_pattern_extract_trans(pat);
+ gdouble theta = atan2(delta);
if ( state & GDK_CONTROL_MASK ) {
theta = sp_round(theta, M_PI/snaps);
}
- Geom::Matrix rot = Geom::Matrix(Geom::Translate(-transform_origin))
- * Geom::Rotate(theta)
- * Geom::Translate(transform_origin);
- sp_item_adjust_pattern(item, rot);
+ // get the scale from the current transform so we can keep it.
+ Geom::Point scl = sp_pattern_extract_scale(pat);
+ Geom::Matrix rot = Geom::Matrix(Geom::Scale(scl)) * Geom::Matrix(Geom::Rotate(theta));
+ Geom::Point const t = sp_pattern_extract_trans(pat);
+ rot[4] = t[Geom::X];
+ rot[5] = t[Geom::Y];
+ sp_item_adjust_pattern(item, rot, true);
item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
-Geom::Point
-PatternKnotHolderEntityScale::knot_get()
-{
- SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
-
- gdouble x = pattern_width(pat);
- gdouble y = 0;
- Geom::Point delta = Geom::Point(x,y) * pat->patternTransform;
- return delta;
-}
-
void
PatternKnotHolderEntityScale::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
@@ -232,32 +232,49 @@ PatternKnotHolderEntityScale::knot_set(Geom::Point const &p, Geom::Point const &
// FIXME: this snapping should be done together with knowing whether control was pressed. If GDK_CONTROL_MASK, then constrained snapping should be used.
Geom::Point p_snapped = snap_knot_position(p);
- Geom::Point knot_relpos(pattern_width(pat), 0);
- Geom::Point xy_knot_relpos(0, -pattern_height(pat));
- Geom::Point transform_origin = xy_knot_relpos * pat->patternTransform;
-
- // do the scaling in pattern coordinate space
- Geom::Point oldp = knot_relpos - xy_knot_relpos;
- Geom::Point newp = p_snapped * pat->patternTransform.inverse() - xy_knot_relpos;
-
- if (Geom::are_near(newp.length(), 0)) return;
+ // get angle from current transform
+ gdouble theta = sp_pattern_extract_theta(pat);
- Geom::Scale s(1);
- if (state & GDK_CONTROL_MASK) {
- // uniform scaling
- s = Geom::Scale(oldp * (newp.length() * oldp.length()));
+ // Get the new scale from the position of the knotholder
+ Geom::Point d = p_snapped - sp_pattern_extract_trans(pat);
+ gdouble pat_x = pattern_width(pat);
+ gdouble pat_y = pattern_height(pat);
+ Geom::Scale scl(1);
+ if ( state & GDK_CONTROL_MASK ) {
+ // if ctrl is pressed: use 1:1 scaling
+ gdouble pat_h = hypot(pat_x, pat_y);
+ scl = Geom::Scale(d.length() / pat_h);
} else {
- s = Geom::Scale(newp[Geom::X] / oldp[Geom::X], newp[Geom::Y] / oldp[Geom::Y]);
+ d *= Geom::Rotate(-theta);
+ scl = Geom::Scale(d[Geom::X] / pat_x, d[Geom::Y] / pat_y);
}
- Geom::Matrix scl = Geom::Matrix(Geom::Translate(-xy_knot_relpos))
- * s
- * Geom::Translate(xy_knot_relpos)
- * pat->patternTransform;
- sp_item_adjust_pattern(item, scl, true);
+ Geom::Matrix rot = (Geom::Matrix)scl * Geom::Rotate(theta);
+
+ Geom::Point const t = sp_pattern_extract_trans(pat);
+ rot[4] = t[Geom::X];
+ rot[5] = t[Geom::Y];
+ sp_item_adjust_pattern(item, rot, true);
item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
+
+Geom::Point
+PatternKnotHolderEntityScale::knot_get()
+{
+ SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
+
+ gdouble x = pattern_width(pat);
+ gdouble y = pattern_height(pat);
+ Geom::Point delta = Geom::Point(x,y);
+ Geom::Matrix a = pat->patternTransform;
+ a[4] = 0;
+ a[5] = 0;
+ delta = delta * a;
+ delta = delta + sp_pattern_extract_trans(pat);
+ return delta;
+}
+
/*
Local Variables:
mode:c++
generated by cgit v1.2.3 (git 2.25.1) at 2026-05-19 04:32:21 +0000