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got the speed working (yay) but the angular velocity that results is superrrr low, thus not creating any rotation after impact, wierd...

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Karma Riuk
2023-04-02 21:53:21 +02:00
parent 7dc54ddfe5
commit d0de911344
8 changed files with 390 additions and 52 deletions
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41
polygons.h
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@ -8,6 +8,8 @@
#include <utility>
#include <vector>
typedef std::pair<vec2d, vec2d> rect;
class polygon {
private:
void update_global_points();
@ -16,30 +18,32 @@ class polygon {
vec2d center;
double angle;
std::vector<vec2d> points;
double inertia;
double mass;
std::vector<vec2d> global_points = points;
vec2d speed;
double angular_speed;
double mass = 1;
void draw(cairo_t* cr) const;
void draw_bounding_rect(cairo_t* cr) const;
std::pair<vec2d, vec2d> get_bounding_box() const {
vec2d min{INFINITY, INFINITY}, max{-INFINITY, -INFINITY};
rect get_bounding_box() const {
vec2d tl{INFINITY, INFINITY}, tr{-INFINITY, -INFINITY};
for (auto& point : this->global_points) {
if (point.x < min.x)
min.x = point.x;
if (point.y < min.y)
min.y = point.y;
if (point.x < tl.x)
tl.x = point.x;
if (point.y < tl.y)
tl.y = point.y;
if (point.x > max.x)
max.x = point.x;
if (point.y > max.y)
max.y = point.y;
if (point.x > tr.x)
tr.x = point.x;
if (point.y > tr.y)
tr.y = point.y;
}
return {min, max};
return {tl, tr};
}
polygon& set_center(vec2d c) {
@ -64,6 +68,11 @@ class polygon {
return *this;
}
polygon& set_mass(double m) {
mass = m;
return *this;
}
polygon& translate(vec2d delta) {
center += delta;
update_global_points();
@ -75,6 +84,14 @@ class polygon {
update_global_points();
return *this;
}
vec2d centroid() const {
double x = 0, y = 0;
for (auto& p : global_points)
x += p.x, y += p.y;
return vec2d{x, y} / points.size();
}
};
extern polygon* polygons;