summaryrefslogtreecommitdiff
path: root/core/math/rect2.h
diff options
context:
space:
mode:
Diffstat (limited to 'core/math/rect2.h')
-rw-r--r--core/math/rect2.h125
1 files changed, 107 insertions, 18 deletions
diff --git a/core/math/rect2.h b/core/math/rect2.h
index 14393325ec..aecba9e88c 100644
--- a/core/math/rect2.h
+++ b/core/math/rect2.h
@@ -123,8 +123,9 @@ struct Rect2 {
_FORCE_INLINE_ bool has_no_area() const {
return (size.x <= 0 || size.y <= 0);
}
- inline Rect2 clip(const Rect2 &p_rect) const { /// return a clipped rect
+ // Returns the instersection between two Rect2s or an empty Rect2 if there is no intersection
+ inline Rect2 intersection(const Rect2 &p_rect) const {
Rect2 new_rect = p_rect;
if (!intersects(new_rect)) {
@@ -188,15 +189,19 @@ struct Rect2 {
return g;
}
- inline Rect2 grow_margin(Margin p_margin, real_t p_amount) const {
+ inline Rect2 grow_margin(Side p_side, real_t p_amount) const {
Rect2 g = *this;
- g = g.grow_individual((MARGIN_LEFT == p_margin) ? p_amount : 0,
- (MARGIN_TOP == p_margin) ? p_amount : 0,
- (MARGIN_RIGHT == p_margin) ? p_amount : 0,
- (MARGIN_BOTTOM == p_margin) ? p_amount : 0);
+ g = g.grow_individual((SIDE_LEFT == p_side) ? p_amount : 0,
+ (SIDE_TOP == p_side) ? p_amount : 0,
+ (SIDE_RIGHT == p_side) ? p_amount : 0,
+ (SIDE_BOTTOM == p_side) ? p_amount : 0);
return g;
}
+ inline Rect2 grow_margin_bind(uint32_t p_side, real_t p_amount) const {
+ return grow_margin(Side(p_side), p_amount);
+ }
+
inline Rect2 grow_individual(real_t p_left, real_t p_top, real_t p_right, real_t p_bottom) const {
Rect2 g = *this;
g.position.x -= p_left;
@@ -240,6 +245,77 @@ struct Rect2 {
return Rect2(Point2(position.x + MIN(size.x, 0), position.y + MIN(size.y, 0)), size.abs());
}
+ Vector2 get_support(const Vector2 &p_normal) const {
+ Vector2 half_extents = size * 0.5;
+ Vector2 ofs = position + half_extents;
+ return Vector2(
+ (p_normal.x > 0) ? -half_extents.x : half_extents.x,
+ (p_normal.y > 0) ? -half_extents.y : half_extents.y) +
+ ofs;
+ }
+
+ _FORCE_INLINE_ bool intersects_filled_polygon(const Vector2 *p_points, int p_point_count) const {
+ Vector2 center = position + size * 0.5;
+ int side_plus = 0;
+ int side_minus = 0;
+ Vector2 end = position + size;
+
+ int i_f = p_point_count - 1;
+ for (int i = 0; i < p_point_count; i++) {
+ const Vector2 &a = p_points[i_f];
+ const Vector2 &b = p_points[i];
+ i_f = i;
+
+ Vector2 r = (b - a);
+ float l = r.length();
+ if (l == 0.0) {
+ continue;
+ }
+
+ //check inside
+ Vector2 tg = r.tangent();
+ float s = tg.dot(center) - tg.dot(a);
+ if (s < 0.0) {
+ side_plus++;
+ } else {
+ side_minus++;
+ }
+
+ //check ray box
+ r /= l;
+ Vector2 ir(1.0 / r.x, 1.0 / r.y);
+
+ // lb is the corner of AABB with minimal coordinates - left bottom, rt is maximal corner
+ // r.org is origin of ray
+ Vector2 t13 = (position - a) * ir;
+ Vector2 t24 = (end - a) * ir;
+
+ float tmin = MAX(MIN(t13.x, t24.x), MIN(t13.y, t24.y));
+ float tmax = MIN(MAX(t13.x, t24.x), MAX(t13.y, t24.y));
+
+ // if tmax < 0, ray (line) is intersecting AABB, but the whole AABB is behind us
+ if (tmax < 0 || tmin > tmax || tmin >= l) {
+ continue;
+ }
+
+ return true;
+ }
+
+ if (side_plus * side_minus == 0) {
+ return true; //all inside
+ } else {
+ return false;
+ }
+ }
+
+ _FORCE_INLINE_ void set_end(const Vector2 &p_end) {
+ size = p_end - position;
+ }
+
+ _FORCE_INLINE_ Vector2 get_end() const {
+ return position + size;
+ }
+
operator String() const { return String(position) + ", " + String(size); }
Rect2() {}
@@ -290,8 +366,9 @@ struct Rect2i {
_FORCE_INLINE_ bool has_no_area() const {
return (size.x <= 0 || size.y <= 0);
}
- inline Rect2i clip(const Rect2i &p_rect) const { /// return a clipped rect
+ // Returns the instersection between two Rect2is or an empty Rect2i if there is no intersection
+ inline Rect2i intersection(const Rect2i &p_rect) const {
Rect2i new_rect = p_rect;
if (!intersects(new_rect)) {
@@ -301,8 +378,8 @@ struct Rect2i {
new_rect.position.x = MAX(p_rect.position.x, position.x);
new_rect.position.y = MAX(p_rect.position.y, position.y);
- Point2 p_rect_end = p_rect.position + p_rect.size;
- Point2 end = position + size;
+ Point2i p_rect_end = p_rect.position + p_rect.size;
+ Point2i end = position + size;
new_rect.size.x = (int)(MIN(p_rect_end.x, end.x) - new_rect.position.x);
new_rect.size.y = (int)(MIN(p_rect_end.y, end.y) - new_rect.position.y);
@@ -324,7 +401,7 @@ struct Rect2i {
return new_rect;
}
- bool has_point(const Point2 &p_point) const {
+ bool has_point(const Point2i &p_point) const {
if (p_point.x < position.x) {
return false;
}
@@ -354,15 +431,19 @@ struct Rect2i {
return g;
}
- inline Rect2i grow_margin(Margin p_margin, int p_amount) const {
+ inline Rect2i grow_margin(Side p_side, int p_amount) const {
Rect2i g = *this;
- g = g.grow_individual((MARGIN_LEFT == p_margin) ? p_amount : 0,
- (MARGIN_TOP == p_margin) ? p_amount : 0,
- (MARGIN_RIGHT == p_margin) ? p_amount : 0,
- (MARGIN_BOTTOM == p_margin) ? p_amount : 0);
+ g = g.grow_individual((SIDE_LEFT == p_side) ? p_amount : 0,
+ (SIDE_TOP == p_side) ? p_amount : 0,
+ (SIDE_RIGHT == p_side) ? p_amount : 0,
+ (SIDE_BOTTOM == p_side) ? p_amount : 0);
return g;
}
+ inline Rect2i grow_margin_bind(uint32_t p_side, int p_amount) const {
+ return grow_margin(Side(p_side), p_amount);
+ }
+
inline Rect2i grow_individual(int p_left, int p_top, int p_right, int p_bottom) const {
Rect2i g = *this;
g.position.x -= p_left;
@@ -405,6 +486,14 @@ struct Rect2i {
return Rect2i(Point2i(position.x + MIN(size.x, 0), position.y + MIN(size.y, 0)), size.abs());
}
+ _FORCE_INLINE_ void set_end(const Vector2i &p_end) {
+ size = p_end - position;
+ }
+
+ _FORCE_INLINE_ Vector2i get_end() const {
+ return position + size;
+ }
+
operator String() const { return String(position) + ", " + String(size); }
operator Rect2() const { return Rect2(position, size); }
@@ -415,10 +504,10 @@ struct Rect2i {
size(p_r2.size) {
}
Rect2i(int p_x, int p_y, int p_width, int p_height) :
- position(Point2(p_x, p_y)),
- size(Size2(p_width, p_height)) {
+ position(Point2i(p_x, p_y)),
+ size(Size2i(p_width, p_height)) {
}
- Rect2i(const Point2 &p_pos, const Size2 &p_size) :
+ Rect2i(const Point2i &p_pos, const Size2i &p_size) :
position(p_pos),
size(p_size) {
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-21 08:56:22 +0000