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Add closed property to Line2D

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This commit is contained in:
MewPurPur 2023-07-08 00:22:09 +03:00 committed by MewPurPur
parent fc99492d30
commit e39875a20d
5 changed files with 221 additions and 215 deletions
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13
doc/classes/Line2D.xml
View file

@ -63,16 +63,21 @@
[b]Note:[/b] [Line2D] is not accelerated by batching when being anti-aliased.
</member>
<member name="begin_cap_mode" type="int" setter="set_begin_cap_mode" getter="get_begin_cap_mode" enum="Line2D.LineCapMode" default="0">
The style of the beginning of the polyline. Use [enum LineCapMode] constants.
The style of the beginning of the polyline, if [member closed] is [code]false[/code]. Use [enum LineCapMode] constants.
</member>
<member name="closed" type="bool" setter="set_closed" getter="is_closed" default="false">
If [code]true[/code] and the polyline has more than 2 points, the last point and the first one will be connected by a segment.
[b]Note:[/b] The shape of the closing segment is not guaranteed to be seamless if a [member width_curve] is provided.
[b]Note:[/b] The joint between the closing segment and the first segment is drawn first and it samples the [member gradient] and the [member width_curve] at the beginning. This is an implementation detail that might change in a future version.
</member>
<member name="default_color" type="Color" setter="set_default_color" getter="get_default_color" default="Color(1, 1, 1, 1)">
The color of the polyline. Will not be used if a gradient is set.
</member>
<member name="end_cap_mode" type="int" setter="set_end_cap_mode" getter="get_end_cap_mode" enum="Line2D.LineCapMode" default="0">
The style of the end of the polyline. Use [enum LineCapMode] constants.
The style of the end of the polyline, if [member closed] is [code]false[/code]. Use [enum LineCapMode] constants.
</member>
<member name="gradient" type="Gradient" setter="set_gradient" getter="get_gradient">
The gradient is drawn through the whole line from start to finish. The default color will not be used if a gradient is set.
The gradient is drawn through the whole line from start to finish. The [member default_color] will not be used if this property is set.
</member>
<member name="joint_mode" type="int" setter="set_joint_mode" getter="get_joint_mode" enum="Line2D.LineJointMode" default="0">
The style of the connections between segments of the polyline. Use [enum LineJointMode] constants.
@ -93,7 +98,7 @@
The style to render the [member texture] of the polyline. Use [enum LineTextureMode] constants.
</member>
<member name="width" type="float" setter="set_width" getter="get_width" default="10.0">
The polyline's width
The polyline's width.
</member>
<member name="width_curve" type="Curve" setter="set_curve" getter="get_curve">
The polyline's width curve. The width of the polyline over its length will be equivalent to the value of the width curve over its domain.

63
scene/2d/line_2d.cpp
View file

@ -42,12 +42,12 @@ Rect2 Line2D::_edit_get_rect() const {
return Rect2(0, 0, 0, 0);
}
Vector2 d = Vector2(_width, _width);
Rect2 aabb = Rect2(_points[0] - d, 2 * d);
Rect2 bounding_rect = Rect2(_points[0] - d, 2 * d);
for (int i = 1; i < _points.size(); i++) {
aabb.expand_to(_points[i] - d);
aabb.expand_to(_points[i] + d);
bounding_rect.expand_to(_points[i] - d);
bounding_rect.expand_to(_points[i] + d);
}
return aabb;
return bounding_rect;
}
bool Line2D::_edit_use_rect() const {
@ -59,7 +59,14 @@ bool Line2D::_edit_is_selected_on_click(const Point2 &p_point, double p_toleranc
const Vector2 *points = _points.ptr();
for (int i = 0; i < _points.size() - 1; i++) {
Vector2 p = Geometry2D::get_closest_point_to_segment(p_point, &points[i]);
if (p.distance_to(p_point) <= d) {
if (p_point.distance_to(p) <= d) {
return true;
}
}
if (_closed && _points.size() > 2) {
const Vector2 closing_segment[2] = { points[0], points[_points.size() - 1] };
Vector2 p = Geometry2D::get_closest_point_to_segment(p_point, closing_segment);
if (p_point.distance_to(p) <= d) {
return true;
}
}
@ -73,6 +80,15 @@ void Line2D::set_points(const Vector<Vector2> &p_points) {
queue_redraw();
}
void Line2D::set_closed(bool p_closed) {
_closed = p_closed;
queue_redraw();
}
bool Line2D::is_closed() const {
return _closed;
}
void Line2D::set_width(float p_width) {
if (p_width < 0.0) {
p_width = 0.0;
@ -86,14 +102,12 @@ float Line2D::get_width() const {
}
void Line2D::set_curve(const Ref<Curve> &p_curve) {
// Cleanup previous connection if any
if (_curve.is_valid()) {
_curve->disconnect_changed(callable_mp(this, &Line2D::_curve_changed));
}
_curve = p_curve;
// Connect to the curve so the line will update when it is changed
if (_curve.is_valid()) {
_curve->connect_changed(callable_mp(this, &Line2D::_curve_changed));
}
@ -156,14 +170,12 @@ Color Line2D::get_default_color() const {
}
void Line2D::set_gradient(const Ref<Gradient> &p_gradient) {
// Cleanup previous connection if any
if (_gradient.is_valid()) {
_gradient->disconnect_changed(callable_mp(this, &Line2D::_gradient_changed));
}
_gradient = p_gradient;
// Connect to the gradient so the line will update when the Gradient is changed
if (_gradient.is_valid()) {
_gradient->connect_changed(callable_mp(this, &Line2D::_gradient_changed));
}
@ -264,20 +276,10 @@ void Line2D::_draw() {
return;
}
// TODO Is this really needed?
// Copy points for faster access
Vector<Vector2> points;
points.resize(len);
{
const Vector2 *points_read = _points.ptr();
for (int i = 0; i < len; ++i) {
points.write[i] = points_read[i];
}
}
// TODO Maybe have it as member rather than copying parameters and allocating memory?
LineBuilder lb;
lb.points = points;
lb.points = _points;
lb.closed = _closed;
lb.default_color = _default_color;
lb.gradient = *_gradient;
lb.texture_mode = _texture_mode;
@ -306,13 +308,10 @@ void Line2D::_draw() {
lb.uvs, Vector<int>(), Vector<float>(),
texture_rid);
// DEBUG
// Draw wireframe
// if(lb.indices.size() % 3 == 0) {
// Color col(0,0,0);
// for(int i = 0; i < lb.indices.size(); i += 3) {
// int vi = lb.indices[i];
// int lbvsize = lb.vertices.size();
// DEBUG: Draw wireframe
// if (lb.indices.size() % 3 == 0) {
// Color col(0, 0, 0);
// for (int i = 0; i < lb.indices.size(); i += 3) {
// Vector2 a = lb.vertices[lb.indices[i]];
// Vector2 b = lb.vertices[lb.indices[i+1]];
// Vector2 c = lb.vertices[lb.indices[i+2]];
@ -320,9 +319,9 @@ void Line2D::_draw() {
// draw_line(b, c, col);
// draw_line(c, a, col);
// }
// for(int i = 0; i < lb.vertices.size(); ++i) {
// for (int i = 0; i < lb.vertices.size(); ++i) {
// Vector2 p = lb.vertices[i];
// draw_rect(Rect2(p.x-1, p.y-1, 2, 2), Color(0,0,0,0.5));
// draw_rect(Rect2(p.x - 1, p.y - 1, 2, 2), Color(0, 0, 0, 0.5));
// }
// }
}
@ -350,6 +349,9 @@ void Line2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("clear_points"), &Line2D::clear_points);
ClassDB::bind_method(D_METHOD("set_closed", "closed"), &Line2D::set_closed);
ClassDB::bind_method(D_METHOD("is_closed"), &Line2D::is_closed);
ClassDB::bind_method(D_METHOD("set_width", "width"), &Line2D::set_width);
ClassDB::bind_method(D_METHOD("get_width"), &Line2D::get_width);
@ -387,6 +389,7 @@ void Line2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_antialiased"), &Line2D::get_antialiased);
ADD_PROPERTY(PropertyInfo(Variant::PACKED_VECTOR2_ARRAY, "points"), "set_points", "get_points");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "closed"), "set_closed", "is_closed");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "width", PROPERTY_HINT_NONE, "suffix:px"), "set_width", "get_width");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "width_curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve"), "set_curve", "get_curve");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "default_color"), "set_default_color", "get_default_color");

4
scene/2d/line_2d.h
View file

@ -76,6 +76,9 @@ public:
void add_point(Vector2 pos, int atpos = -1);
void remove_point(int i);
void set_closed(bool p_closed);
bool is_closed() const;
void set_width(float width);
float get_width() const;
@ -127,6 +130,7 @@ private:
LineJointMode _joint_mode = LINE_JOINT_SHARP;
LineCapMode _begin_cap_mode = LINE_CAP_NONE;
LineCapMode _end_cap_mode = LINE_CAP_NONE;
bool _closed = false;
float _width = 10.0;
Ref<Curve> _curve;
Color _default_color = Color(1, 1, 1);

354
scene/2d/line_builder.cpp
View file

@ -30,75 +30,25 @@
#include "line_builder.h"
//----------------------------------------------------------------------------
// Util
//----------------------------------------------------------------------------
enum SegmentIntersectionResult {
SEGMENT_PARALLEL = 0,
SEGMENT_NO_INTERSECT = 1,
SEGMENT_INTERSECT = 2
};
static SegmentIntersectionResult segment_intersection(
Vector2 a, Vector2 b, Vector2 c, Vector2 d,
Vector2 *out_intersection) {
// http://paulbourke.net/geometry/pointlineplane/ <-- Good stuff
Vector2 cd = d - c;
Vector2 ab = b - a;
float div = cd.y * ab.x - cd.x * ab.y;
if (Math::abs(div) > 0.001f) {
float ua = (cd.x * (a.y - c.y) - cd.y * (a.x - c.x)) / div;
float ub = (ab.x * (a.y - c.y) - ab.y * (a.x - c.x)) / div;
*out_intersection = a + ua * ab;
if (ua >= 0.f && ua <= 1.f &&
ub >= 0.f && ub <= 1.f) {
return SEGMENT_INTERSECT;
}
return SEGMENT_NO_INTERSECT;
}
return SEGMENT_PARALLEL;
}
static float calculate_total_distance(const Vector<Vector2> &points) {
float d = 0.f;
for (int i = 1; i < points.size(); ++i) {
d += points[i].distance_to(points[i - 1]);
}
return d;
}
static inline Vector2 rotate90(const Vector2 &v) {
// Note: the 2D referential is X-right, Y-down
return Vector2(v.y, -v.x);
}
#include "core/math/geometry_2d.h"
// Utility method.
static inline Vector2 interpolate(const Rect2 &r, const Vector2 &v) {
return Vector2(
Math::lerp(r.position.x, r.position.x + r.get_size().x, v.x),
Math::lerp(r.position.y, r.position.y + r.get_size().y, v.y));
}
//----------------------------------------------------------------------------
// LineBuilder
//----------------------------------------------------------------------------
LineBuilder::LineBuilder() {
}
void LineBuilder::clear_output() {
vertices.clear();
colors.clear();
indices.clear();
uvs.clear();
}
void LineBuilder::build() {
// Need at least 2 points to draw a line
// Need at least 2 points to draw a line, so clear the output and return.
if (points.size() < 2) {
clear_output();
vertices.clear();
colors.clear();
indices.clear();
uvs.clear();
return;
}
@ -107,14 +57,21 @@ void LineBuilder::build() {
const float hw = width / 2.f;
const float hw_sq = hw * hw;
const float sharp_limit_sq = sharp_limit * sharp_limit;
const int len = points.size();
const int point_count = points.size();
const bool wrap_around = closed && point_count > 2;
_interpolate_color = gradient != nullptr;
const bool retrieve_curve = curve != nullptr;
const bool distance_required = _interpolate_color || retrieve_curve ||
texture_mode == Line2D::LINE_TEXTURE_TILE ||
texture_mode == Line2D::LINE_TEXTURE_STRETCH;
// Initial values
Vector2 pos0 = points[0];
Vector2 pos1 = points[1];
Vector2 f0 = (pos1 - pos0).normalized();
Vector2 u0 = rotate90(f0);
Vector2 u0 = f0.orthogonal();
Vector2 pos_up0 = pos0;
Vector2 pos_down0 = pos0;
@ -124,32 +81,37 @@ void LineBuilder::build() {
float current_distance0 = 0.f;
float current_distance1 = 0.f;
float total_distance = 0.f;
float width_factor = 1.f;
_interpolate_color = gradient != nullptr;
bool retrieve_curve = curve != nullptr;
bool distance_required = _interpolate_color ||
retrieve_curve ||
texture_mode == Line2D::LINE_TEXTURE_TILE ||
texture_mode == Line2D::LINE_TEXTURE_STRETCH;
float modified_hw = hw;
if (retrieve_curve) {
width_factor = curve->sample_baked(0.f);
modified_hw = hw * width_factor;
}
if (distance_required) {
total_distance = calculate_total_distance(points);
//Adjust totalDistance.
// The line's outer length will be a little higher due to begin and end caps
if (begin_cap_mode == Line2D::LINE_CAP_BOX || begin_cap_mode == Line2D::LINE_CAP_ROUND) {
if (retrieve_curve) {
total_distance += width * curve->sample_baked(0.f) * 0.5f;
} else {
total_distance += width * 0.5f;
}
// Calculate the total distance.
for (int i = 1; i < point_count; ++i) {
total_distance += points[i].distance_to(points[i - 1]);
}
if (end_cap_mode == Line2D::LINE_CAP_BOX || end_cap_mode == Line2D::LINE_CAP_ROUND) {
if (retrieve_curve) {
total_distance += width * curve->sample_baked(1.f) * 0.5f;
} else {
total_distance += width * 0.5f;
if (wrap_around) {
total_distance += points[point_count - 1].distance_to(pos0);
} else {
// Adjust the total distance.
// The line's outer length may be a little higher due to the end caps.
if (begin_cap_mode == Line2D::LINE_CAP_BOX || begin_cap_mode == Line2D::LINE_CAP_ROUND) {
total_distance += modified_hw;
}
if (end_cap_mode == Line2D::LINE_CAP_BOX || end_cap_mode == Line2D::LINE_CAP_ROUND) {
if (retrieve_curve) {
total_distance += hw * curve->sample_baked(1.f);
} else {
total_distance += hw;
}
}
}
}
if (_interpolate_color) {
color0 = gradient->get_color(0);
} else {
@ -159,34 +121,31 @@ void LineBuilder::build() {
float uvx0 = 0.f;
float uvx1 = 0.f;
if (retrieve_curve) {
width_factor = curve->sample_baked(0.f);
}
pos_up0 += u0 * hw * width_factor;
pos_down0 -= u0 * hw * width_factor;
pos_up0 += u0 * modified_hw;
pos_down0 -= u0 * modified_hw;
// Begin cap
if (begin_cap_mode == Line2D::LINE_CAP_BOX) {
// Push back first vertices a little bit
pos_up0 -= f0 * hw * width_factor;
pos_down0 -= f0 * hw * width_factor;
if (!wrap_around) {
if (begin_cap_mode == Line2D::LINE_CAP_BOX) {
// Push back first vertices a little bit.
pos_up0 -= f0 * modified_hw;
pos_down0 -= f0 * modified_hw;
current_distance0 += hw * width_factor;
current_distance1 = current_distance0;
} else if (begin_cap_mode == Line2D::LINE_CAP_ROUND) {
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
uvx0 = width_factor * 0.5f / tile_aspect;
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
uvx0 = width * width_factor / total_distance;
current_distance0 += modified_hw;
current_distance1 = current_distance0;
} else if (begin_cap_mode == Line2D::LINE_CAP_ROUND) {
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
uvx0 = width_factor * 0.5f / tile_aspect;
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
uvx0 = width * width_factor / total_distance;
}
new_arc(pos0, pos_up0 - pos0, -Math_PI, color0, Rect2(0.f, 0.f, uvx0 * 2, 1.f));
current_distance0 += modified_hw;
current_distance1 = current_distance0;
}
new_arc(pos0, pos_up0 - pos0, -Math_PI, color0, Rect2(0.f, 0.f, uvx0 * 2, 1.f));
current_distance0 += hw * width_factor;
current_distance1 = current_distance0;
strip_begin(pos_up0, pos_down0, color0, uvx0);
}
strip_begin(pos_up0, pos_down0, color0, uvx0);
/*
* pos_up0 ------------- pos_up1 --------------------
* | |
@ -200,19 +159,30 @@ void LineBuilder::build() {
// http://labs.hyperandroid.com/tag/opengl-lines
// (not the same implementation but visuals help a lot)
// If the polyline wraps around, then draw two more segments with joints:
// The last one, which should normally end with an end cap, and the one that matches the end and the beginning.
int segments_count = wrap_around ? point_count : (point_count - 2);
// The wraparound case starts with a "fake walk" from the end of the polyline
// to its beginning, so that its first joint is correct, without drawing anything.
int first_point = wrap_around ? -1 : 1;
// If the line wraps around, these variables will be used for the final segment.
Vector2 first_pos_up, first_pos_down;
bool is_first_joint_sharp = false;
// For each additional segment
for (int i = 1; i < len - 1; ++i) {
pos1 = points[i];
Vector2 pos2 = points[i + 1];
for (int i = first_point; i <= segments_count; ++i) {
pos1 = points[(i == -1) ? point_count - 1 : i % point_count]; // First point.
Vector2 pos2 = points[(i + 1) % point_count]; // Second point.
Vector2 f1 = (pos2 - pos1).normalized();
Vector2 u1 = rotate90(f1);
Vector2 u1 = f1.orthogonal();
// Determine joint orientation
const float dp = u0.dot(f1);
// Determine joint orientation.
float dp = u0.dot(f1);
const Orientation orientation = (dp > 0.f ? UP : DOWN);
if (distance_required) {
if (distance_required && i >= 1) {
current_distance1 += pos0.distance_to(pos1);
}
if (_interpolate_color) {
@ -220,15 +190,14 @@ void LineBuilder::build() {
}
if (retrieve_curve) {
width_factor = curve->sample_baked(current_distance1 / total_distance);
modified_hw = hw * width_factor;
}
Vector2 inner_normal0, inner_normal1;
if (orientation == UP) {
inner_normal0 = u0 * hw * width_factor;
inner_normal1 = u1 * hw * width_factor;
} else {
inner_normal0 = -u0 * hw * width_factor;
inner_normal1 = -u1 * hw * width_factor;
Vector2 inner_normal0 = u0 * modified_hw;
Vector2 inner_normal1 = u1 * modified_hw;
if (orientation == DOWN) {
inner_normal0 = -inner_normal0;
inner_normal1 = -inner_normal1;
}
/*
@ -245,18 +214,18 @@ void LineBuilder::build() {
* /
*/
// Find inner intersection at the joint
// Find inner intersection at the joint.
Vector2 corner_pos_in, corner_pos_out;
SegmentIntersectionResult intersection_result = segment_intersection(
bool is_intersecting = Geometry2D::segment_intersects_segment(
pos0 + inner_normal0, pos1 + inner_normal0,
pos1 + inner_normal1, pos2 + inner_normal1,
&corner_pos_in);
if (intersection_result == SEGMENT_INTERSECT) {
// Inner parts of the segments intersect
if (is_intersecting) {
// Inner parts of the segments intersect.
corner_pos_out = 2.f * pos1 - corner_pos_in;
} else {
// No intersection, segments are either parallel or too sharp
// No intersection, segments are too sharp or they overlap.
corner_pos_in = pos1 + inner_normal0;
corner_pos_out = pos1 - inner_normal0;
}
@ -273,8 +242,8 @@ void LineBuilder::build() {
Line2D::LineJointMode current_joint_mode = joint_mode;
Vector2 pos_up1, pos_down1;
if (intersection_result == SEGMENT_INTERSECT) {
// Fallback on bevel if sharp angle is too high (because it would produce very long miters)
if (is_intersecting) {
// Fallback on bevel if sharp angle is too high (because it would produce very long miters).
float width_factor_sq = width_factor * width_factor;
if (current_joint_mode == Line2D::LINE_JOINT_SHARP && corner_pos_out.distance_squared_to(pos1) / (hw_sq * width_factor_sq) > sharp_limit_sq) {
current_joint_mode = Line2D::LINE_JOINT_BEVEL;
@ -288,57 +257,78 @@ void LineBuilder::build() {
// Bevel or round
if (orientation == UP) {
pos_up1 = corner_pos_up;
pos_down1 = pos1 - u0 * hw * width_factor;
pos_down1 = pos1 - u0 * modified_hw;
} else {
pos_up1 = pos1 + u0 * hw * width_factor;
pos_up1 = pos1 + u0 * modified_hw;
pos_down1 = corner_pos_down;
}
}
} else {
// No intersection: fallback
if (current_joint_mode == Line2D::LINE_JOINT_SHARP) {
// There is no fallback implementation for LINE_JOINT_SHARP so switch to the LINE_JOINT_BEVEL
// There is no fallback implementation for LINE_JOINT_SHARP so switch to the LINE_JOINT_BEVEL.
current_joint_mode = Line2D::LINE_JOINT_BEVEL;
}
pos_up1 = corner_pos_up;
pos_down1 = corner_pos_down;
}
// Add current line body quad
// Triangles are clockwise
// Triangles are clockwise.
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
uvx1 = current_distance1 / (width * tile_aspect);
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
uvx1 = current_distance1 / total_distance;
}
strip_add_quad(pos_up1, pos_down1, color1, uvx1);
// Swap vars for use in the next line
// Swap vars for use in the next line.
color0 = color1;
u0 = u1;
f0 = f1;
pos0 = pos1;
if (intersection_result == SEGMENT_INTERSECT) {
if (is_intersecting) {
if (current_joint_mode == Line2D::LINE_JOINT_SHARP) {
pos_up0 = pos_up1;
pos_down0 = pos_down1;
} else {
if (orientation == UP) {
pos_up0 = corner_pos_up;
pos_down0 = pos1 - u1 * hw * width_factor;
pos_down0 = pos1 - u1 * modified_hw;
} else {
pos_up0 = pos1 + u1 * hw * width_factor;
pos_up0 = pos1 + u1 * modified_hw;
pos_down0 = corner_pos_down;
}
}
} else {
pos_up0 = pos1 + u1 * hw * width_factor;
pos_down0 = pos1 - u1 * hw * width_factor;
pos_up0 = pos1 + u1 * modified_hw;
pos_down0 = pos1 - u1 * modified_hw;
}
// From this point, bu0 and bd0 concern the next segment
// Add joint geometry
// End the "fake pass" in the closed line case before the drawing subroutine.
if (i == -1) {
continue;
}
// For wrap-around polylines, store some kind of start positions of the first joint for the final connection.
if (wrap_around && i == 0) {
Vector2 first_pos_center = (pos_up1 + pos_down1) / 2;
float lerp_factor = 1.0 / width_factor;
first_pos_up = first_pos_center.lerp(pos_up1, lerp_factor);
first_pos_down = first_pos_center.lerp(pos_down1, lerp_factor);
is_first_joint_sharp = current_joint_mode == Line2D::LINE_JOINT_SHARP;
}
// Add current line body quad.
if (wrap_around && retrieve_curve && !is_first_joint_sharp && i == segments_count) {
// If the width curve is not seamless, we might need to fetch the line's start points to use them for the final connection.
Vector2 first_pos_center = (first_pos_up + first_pos_down) / 2;
strip_add_quad(first_pos_center.lerp(first_pos_up, width_factor), first_pos_center.lerp(first_pos_down, width_factor), color1, uvx1);
return;
} else {
strip_add_quad(pos_up1, pos_down1, color1, uvx1);
}
// From this point, bu0 and bd0 concern the next segment.
// Add joint geometry.
if (current_joint_mode != Line2D::LINE_JOINT_SHARP) {
/* ________________ cbegin
* / \
@ -358,64 +348,68 @@ void LineBuilder::build() {
cend = pos_up0;
}
if (current_joint_mode == Line2D::LINE_JOINT_BEVEL) {
if (current_joint_mode == Line2D::LINE_JOINT_BEVEL && !(wrap_around && i == segments_count)) {
strip_add_tri(cend, orientation);
} else if (current_joint_mode == Line2D::LINE_JOINT_ROUND) {
} else if (current_joint_mode == Line2D::LINE_JOINT_ROUND && !(wrap_around && i == segments_count)) {
Vector2 vbegin = cbegin - pos1;
Vector2 vend = cend - pos1;
strip_add_arc(pos1, vbegin.angle_to(vend), orientation);
}
if (intersection_result != SEGMENT_INTERSECT) {
if (!is_intersecting) {
// In this case the joint is too corrupted to be re-used,
// start again the strip with fallback points
strip_begin(pos_up0, pos_down0, color1, uvx1);
}
}
}
// Last (or only) segment
pos1 = points[points.size() - 1];
if (distance_required) {
current_distance1 += pos0.distance_to(pos1);
}
if (_interpolate_color) {
color1 = gradient->get_color(gradient->get_point_count() - 1);
}
if (retrieve_curve) {
width_factor = curve->sample_baked(1.f);
}
// Draw the last (or only) segment, with its end cap logic.
if (!wrap_around) {
pos1 = points[point_count - 1];
Vector2 pos_up1 = pos1 + u0 * hw * width_factor;
Vector2 pos_down1 = pos1 - u0 * hw * width_factor;
// End cap (box)
if (end_cap_mode == Line2D::LINE_CAP_BOX) {
pos_up1 += f0 * hw * width_factor;
pos_down1 += f0 * hw * width_factor;
current_distance1 += hw * width_factor;
}
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
uvx1 = current_distance1 / (width * tile_aspect);
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
uvx1 = current_distance1 / total_distance;
}
strip_add_quad(pos_up1, pos_down1, color1, uvx1);
// End cap (round)
if (end_cap_mode == Line2D::LINE_CAP_ROUND) {
// Note: color is not used in case we don't interpolate...
Color color = _interpolate_color ? gradient->get_color(gradient->get_point_count() - 1) : Color(0, 0, 0);
float dist = 0;
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
dist = width_factor / tile_aspect;
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
dist = width * width_factor / total_distance;
if (distance_required) {
current_distance1 += pos0.distance_to(pos1);
}
if (_interpolate_color) {
color1 = gradient->get_color(gradient->get_point_count() - 1);
}
if (retrieve_curve) {
width_factor = curve->sample_baked(1.f);
modified_hw = hw * width_factor;
}
Vector2 pos_up1 = pos1 + u0 * modified_hw;
Vector2 pos_down1 = pos1 - u0 * modified_hw;
// Add extra distance for a box end cap.
if (end_cap_mode == Line2D::LINE_CAP_BOX) {
pos_up1 += f0 * modified_hw;
pos_down1 += f0 * modified_hw;
current_distance1 += modified_hw;
}
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
uvx1 = current_distance1 / (width * tile_aspect);
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
uvx1 = current_distance1 / total_distance;
}
strip_add_quad(pos_up1, pos_down1, color1, uvx1);
// Custom drawing for a round end cap.
if (end_cap_mode == Line2D::LINE_CAP_ROUND) {
// Note: color is not used in case we don't interpolate.
Color color = _interpolate_color ? gradient->get_color(gradient->get_point_count() - 1) : Color(0, 0, 0);
float dist = 0;
if (texture_mode == Line2D::LINE_TEXTURE_TILE) {
dist = width_factor / tile_aspect;
} else if (texture_mode == Line2D::LINE_TEXTURE_STRETCH) {
dist = width * width_factor / total_distance;
}
new_arc(pos1, pos_up1 - pos1, Math_PI, color, Rect2(uvx1 - 0.5f * dist, 0.f, dist, 1.f));
}
new_arc(pos1, pos_up1 - pos1, Math_PI, color, Rect2(uvx1 - 0.5f * dist, 0.f, dist, 1.f));
}
}

2
scene/2d/line_builder.h
View file

@ -41,6 +41,7 @@ public:
Line2D::LineJointMode joint_mode = Line2D::LINE_JOINT_SHARP;
Line2D::LineCapMode begin_cap_mode = Line2D::LINE_CAP_NONE;
Line2D::LineCapMode end_cap_mode = Line2D::LINE_CAP_NONE;
bool closed = false;
float width = 10.0;
Curve *curve = nullptr;
Color default_color = Color(0.4, 0.5, 1);
@ -61,7 +62,6 @@ public:
LineBuilder();
void build();
void clear_output();
private:
enum Orientation {