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feat: added shape_get_min_extent and shape_get_max_extent

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Sara 2024-01-12 16:21:42 +01:00
parent b2f6f9c176
commit 7e9dc4003b
2 changed files with 31 additions and 1 deletions
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29
core/src/shape.c
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@ -11,6 +11,7 @@ struct Shape {
Vector mean; Vector mean;
int is_convex; int is_convex;
Vector min, max;
}; };
static static
@ -40,7 +41,7 @@ int _shape_calculate_is_convex(Shape* self) {
// point relative to mean // point relative to mean
Vector relative; Vector relative;
list_foreach(Vector*, point, &self->points) { list_foreach(Vector*, point, &self->points) {
relative = vsubf(*point, self->mean); relative = vnormalizedf(vsubf(*point, self->mean));
if(point != _shape_get_furthest_in_direction(self, relative)) { if(point != _shape_get_furthest_in_direction(self, relative)) {
return 0; return 0;
} }
@ -183,3 +184,29 @@ void shape_draw(Shape* self, Transform transform) {
SDL_RenderDrawLineF(g_renderer, lhs.x, lhs.y, rhs.x, rhs.y); SDL_RenderDrawLineF(g_renderer, lhs.x, lhs.y, rhs.x, rhs.y);
} }
} }
Vector shape_get_min_extent(Shape* self, Transform* transform) {
if(self->points.len == 0)
return ZeroVector;
Vector min = *list_at_as(Vector, &self->points, 0);
Vector point;
for(size_t i = 0; i < shape_get_points_count(self); ++i) {
point = shape_get_point_transformed(self, i, *transform);
min.x = fminf(min.x, point.x);
min.y = fminf(min.y, point.y);
}
return min;
}
Vector shape_get_max_extent(Shape* self, Transform* transform) {
if(self->points.len == 0)
return ZeroVector;
Vector max = *list_at_as(Vector, &self->points, 0);
Vector point;
for(size_t i = 0; i < shape_get_points_count(self); ++i) {
point = shape_get_point_transformed(self, i, *transform);
max.x = fmaxf(max.x, point.x);
max.y = fmaxf(max.y, point.y);
}
return max;
}

3
core/src/shape.h
View file

@ -29,4 +29,7 @@ extern Vector shape_get_median_point(Shape* self);
extern int shape_is_convex(Shape* self); extern int shape_is_convex(Shape* self);
extern void shape_draw(Shape* self, Transform transform); extern void shape_draw(Shape* self, Transform transform);
extern Vector shape_get_min_extent(Shape* self, Transform* transform);
extern Vector shape_get_max_extent(Shape* self, Transform* transform);
#endif // !_fencer_shape_h #endif // !_fencer_shape_h