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-rw-r--r--scene/resources/bit_map.cpp163
1 files changed, 96 insertions, 67 deletions
diff --git a/scene/resources/bit_map.cpp b/scene/resources/bit_map.cpp
index 1b06e09bb8..204adbcda0 100644
--- a/scene/resources/bit_map.cpp
+++ b/scene/resources/bit_map.cpp
@@ -1,32 +1,32 @@
-/*************************************************************************/
-/* bit_map.cpp */
-/*************************************************************************/
-/* This file is part of: */
-/* GODOT ENGINE */
-/* https://godotengine.org */
-/*************************************************************************/
-/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
-/* */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the */
-/* "Software"), to deal in the Software without restriction, including */
-/* without limitation the rights to use, copy, modify, merge, publish, */
-/* distribute, sublicense, and/or sell copies of the Software, and to */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions: */
-/* */
-/* The above copyright notice and this permission notice shall be */
-/* included in all copies or substantial portions of the Software. */
-/* */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
-/*************************************************************************/
+/**************************************************************************/
+/* bit_map.cpp */
+/**************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/**************************************************************************/
#include "bit_map.h"
@@ -169,7 +169,7 @@ Dictionary BitMap::_get_data() const {
return d;
}
-Vector<Vector2> BitMap::_march_square(const Rect2i &p_rect, const Point2i &p_start) const {
+Vector<Vector<Vector2>> BitMap::_march_square(const Rect2i &p_rect, const Point2i &p_start) const {
int stepx = 0;
int stepy = 0;
int prevx = 0;
@@ -179,9 +179,17 @@ Vector<Vector2> BitMap::_march_square(const Rect2i &p_rect, const Point2i &p_sta
int curx = startx;
int cury = starty;
unsigned int count = 0;
- HashSet<Point2i> case9s;
- HashSet<Point2i> case6s;
+
+ HashMap<Point2i, int> cross_map;
+
Vector<Vector2> _points;
+ int points_size = 0;
+
+ Vector<Vector<Vector2>> ret;
+
+ // Add starting entry at start of return.
+ ret.resize(1);
+
do {
int sv = 0;
{ // Square value
@@ -202,7 +210,7 @@ Vector<Vector2> BitMap::_march_square(const Rect2i &p_rect, const Point2i &p_sta
sv += (p_rect.has_point(bl) && get_bitv(bl)) ? 4 : 0;
Point2i br = Point2i(curx, cury);
sv += (p_rect.has_point(br) && get_bitv(br)) ? 8 : 0;
- ERR_FAIL_COND_V(sv == 0 || sv == 15, Vector<Vector2>());
+ ERR_FAIL_COND_V(sv == 0 || sv == 15, Vector<Vector<Vector2>>());
}
switch (sv) {
@@ -266,70 +274,95 @@ Vector<Vector2> BitMap::_march_square(const Rect2i &p_rect, const Point2i &p_sta
stepy = 0;
break;
case 9:
- /*
+ /* Going DOWN if coming from the LEFT, otherwise go UP.
+ 9
+---+---+
| 1 | |
+---+---+
| | 8 |
+---+---+
- this should normally go UP, but if we already been here, we go down
*/
- if (case9s.has(Point2i(curx, cury))) {
- //found, so we go down, and delete from case9s;
+
+ if (prevx == 1) {
stepx = 0;
stepy = 1;
- case9s.erase(Point2i(curx, cury));
} else {
- //not found, we go up, and add to case9s;
stepx = 0;
stepy = -1;
- case9s.insert(Point2i(curx, cury));
}
break;
case 6:
- /*
+ /* Going RIGHT if coming from BELOW, otherwise go LEFT.
6
+---+---+
| | 2 |
+---+---+
| 4 | |
+---+---+
- this normally go RIGHT, but if it's coming from RIGHT, it should go LEFT
*/
- if (case6s.has(Point2i(curx, cury))) {
- //found, so we go left, and delete from case6s;
- stepx = -1;
+
+ if (prevy == -1) {
+ stepx = 1;
stepy = 0;
- case6s.erase(Point2i(curx, cury));
} else {
- //not found, we go right, and add to case6s;
- stepx = 1;
+ stepx = -1;
stepy = 0;
- case6s.insert(Point2i(curx, cury));
}
break;
default:
ERR_PRINT("this shouldn't happen.");
}
+
+ // Handle crossing points.
+ if (sv == 6 || sv == 9) {
+ const Point2i cur_pos(curx, cury);
+
+ // Find if this point has occurred before.
+ if (HashMap<Point2i, int>::Iterator found = cross_map.find(cur_pos)) {
+ // Add points after the previous crossing to the result.
+ ret.push_back(_points.slice(found->value + 1, points_size));
+
+ // Remove points after crossing point.
+ points_size = found->value + 1;
+
+ // Erase trailing map elements.
+ while (cross_map.last() != found) {
+ cross_map.remove(cross_map.last());
+ }
+
+ cross_map.erase(cur_pos);
+ } else {
+ // Add crossing point to map.
+ cross_map.insert(cur_pos, points_size - 1);
+ }
+ }
+
// Small optimization:
// If the previous direction is same as the current direction,
// then we should modify the last vector to current.
curx += stepx;
cury += stepy;
if (stepx == prevx && stepy == prevy) {
- _points.write[_points.size() - 1].x = (float)(curx - p_rect.position.x);
- _points.write[_points.size() - 1].y = (float)(cury + p_rect.position.y);
+ _points.set(points_size - 1, Vector2(curx, cury) - p_rect.position);
} else {
- _points.push_back(Vector2((float)(curx - p_rect.position.x), (float)(cury + p_rect.position.y)));
+ _points.resize(MAX(points_size + 1, _points.size()));
+ _points.set(points_size, Vector2(curx, cury) - p_rect.position);
+ points_size++;
}
count++;
prevx = stepx;
prevy = stepy;
- ERR_FAIL_COND_V((int)count > width * height, _points);
+ ERR_FAIL_COND_V((int)count > width * height, Vector<Vector<Vector2>>());
} while (curx != startx || cury != starty);
- return _points;
+
+ // Add remaining points to result.
+ _points.resize(points_size);
+
+ ret.set(0, _points);
+
+ return ret;
}
static float perpendicular_distance(const Vector2 &i, const Vector2 &start, const Vector2 &end) {
@@ -442,7 +475,7 @@ static void fill_bits(const BitMap *p_src, Ref<BitMap> &p_map, const Point2i &p_
for (int j = next_j; j <= pos.y + 1; j++) {
if (popped) {
// The next loop over j must start normally.
- next_j = pos.y;
+ next_j = pos.y - 1;
popped = false;
// Skip because an iteration was already executed with current counter values.
continue;
@@ -486,13 +519,10 @@ static void fill_bits(const BitMap *p_src, Ref<BitMap> &p_map, const Point2i &p_
}
}
} while (reenter || popped);
-
- print_verbose("BitMap: Max stack size: " + itos(stack.size()));
}
Vector<Vector<Vector2>> BitMap::clip_opaque_to_polygons(const Rect2i &p_rect, float p_epsilon) const {
Rect2i r = Rect2i(0, 0, width, height).intersection(p_rect);
- print_verbose("BitMap: Rect: " + r);
Point2i from;
Ref<BitMap> fill;
@@ -505,17 +535,16 @@ Vector<Vector<Vector2>> BitMap::clip_opaque_to_polygons(const Rect2i &p_rect, fl
if (!fill->get_bit(j, i) && get_bit(j, i)) {
fill_bits(this, fill, Point2i(j, i), r);
- Vector<Vector2> polygon = _march_square(r, Point2i(j, i));
- print_verbose("BitMap: Pre reduce: " + itos(polygon.size()));
- polygon = reduce(polygon, r, p_epsilon);
- print_verbose("BitMap: Post reduce: " + itos(polygon.size()));
+ for (Vector<Vector2> polygon : _march_square(r, Point2i(j, i))) {
+ polygon = reduce(polygon, r, p_epsilon);
- if (polygon.size() < 3) {
- print_verbose("Invalid polygon, skipped");
- continue;
- }
+ if (polygon.size() < 3) {
+ print_verbose("Invalid polygon, skipped");
+ continue;
+ }
- polygons.push_back(polygon);
+ polygons.push_back(polygon);
+ }
}
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 03:22:44 +0000