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Added Brenzenham's line algorithm found in the TileMapEditorPlugin to Geometry, and it's binder class.

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This commit is contained in:
Relintai 2022-11-20 02:33:40 +01:00
parent e5fd8cd2b5
commit 5aa98e8955
3 changed files with 97 additions and 3 deletions
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6
core/bind/core_bind.cpp
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@ -1889,6 +1889,10 @@ int _Geometry::get_uv84_normal_bit(const Vector3 &p_vector) {
return Geometry::get_uv84_normal_bit(p_vector);
}
PoolVector2iArray _Geometry::brenzenham_line(int x0, int x1, int y0, int y1) {
return Geometry::brenzenham_line_pv(x0, x1, y0, y1);
}
void _Geometry::_bind_methods() {
ClassDB::bind_method(D_METHOD("build_box_planes", "extents"), &_Geometry::build_box_planes);
ClassDB::bind_method(D_METHOD("build_cylinder_planes", "radius", "height", "sides", "axis"), &_Geometry::build_cylinder_planes, DEFVAL(Vector3::AXIS_Z));
@ -1936,6 +1940,8 @@ void _Geometry::_bind_methods() {
ClassDB::bind_method(D_METHOD("make_atlas", "sizes"), &_Geometry::make_atlas);
ClassDB::bind_method(D_METHOD("brenzenham_line", "x0", "x1", "y0", "y1"), &_Geometry::brenzenham_line);
BIND_ENUM_CONSTANT(OPERATION_UNION);
BIND_ENUM_CONSTANT(OPERATION_DIFFERENCE);
BIND_ENUM_CONSTANT(OPERATION_INTERSECTION);

2
core/bind/core_bind.h
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@ -505,6 +505,8 @@ public:
Dictionary make_atlas(const Vector<Size2> &p_rects);
PoolVector2iArray brenzenham_line(int x0, int x1, int y0, int y1);
_Geometry();
};

92
core/math/geometry.h
View File

@ -30,16 +30,16 @@
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "core/containers/pool_vector.h"
#include "core/containers/vector.h"
#include "core/math/delaunay.h"
#include "core/math/face3.h"
#include "core/math/rect2.h"
#include "core/math/triangulate.h"
#include "core/math/vector3.h"
#include "core/math/vector2i.h"
#include "core/math/vector3.h"
#include "core/object/object.h"
#include "core/containers/pool_vector.h"
#include "core/string/print_string.h"
#include "core/containers/vector.h"
class Geometry {
public:
@ -1021,6 +1021,92 @@ public:
static bool convex_hull_intersects_convex_hull(const Plane *p_planes_a, int p_plane_count_a, const Plane *p_planes_b, int p_plane_count_b);
static real_t calculate_convex_hull_volume(const Geometry::MeshData &p_md);
static _FORCE_INLINE_ Vector<Point2i> brenzenham_line(int x0, int x1, int y0, int y1) {
Vector<Point2i> points;
float dx = ABS(x1 - x0);
float dy = ABS(y1 - y0);
int x = x0;
int y = y0;
int sx = x0 > x1 ? -1 : 1;
int sy = y0 > y1 ? -1 : 1;
if (dx > dy) {
float err = dx / 2;
for (; x != x1; x += sx) {
points.push_back(Vector2(x, y));
err -= dy;
if (err < 0) {
y += sy;
err += dx;
}
}
} else {
float err = dy / 2;
for (; y != y1; y += sy) {
points.push_back(Vector2(x, y));
err -= dx;
if (err < 0) {
x += sx;
err += dy;
}
}
}
points.push_back(Vector2(x, y));
return points;
}
static _FORCE_INLINE_ PoolVector2iArray brenzenham_line_pv(int x0, int x1, int y0, int y1) {
PoolVector2iArray points;
float dx = ABS(x1 - x0);
float dy = ABS(y1 - y0);
int x = x0;
int y = y0;
int sx = x0 > x1 ? -1 : 1;
int sy = y0 > y1 ? -1 : 1;
if (dx > dy) {
float err = dx / 2;
for (; x != x1; x += sx) {
points.push_back(Vector2(x, y));
err -= dy;
if (err < 0) {
y += sy;
err += dx;
}
}
} else {
float err = dy / 2;
for (; y != y1; y += sy) {
points.push_back(Vector2(x, y));
err -= dx;
if (err < 0) {
x += sx;
err += dy;
}
}
}
points.push_back(Vector2(x, y));
return points;
}
private:
static Vector<Vector<Point2>> _polypaths_do_operation(PolyBooleanOperation p_op, const Vector<Point2> &p_polypath_a, const Vector<Point2> &p_polypath_b, bool is_a_open = false);
static Vector<Vector<Point2>> _polypath_offset(const Vector<Point2> &p_polypath, real_t p_delta, PolyJoinType p_join_type, PolyEndType p_end_type);