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Added the possibility to set the fields of the polygon class in a functional programming style

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Karma Riuk 2023-03-14 23:09:48 +01:00
parent 37198d4669
commit 48a1b3ade4
1 changed files with 20 additions and 3 deletions
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23
polygons.h
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@ -1,8 +1,6 @@
#ifndef POLYGONS_H_INCLUDED #ifndef POLYGONS_H_INCLUDED
#define POLYGONS_H_INCLUDED #define POLYGONS_H_INCLUDED
// extern ball spaceship;
#include "vec2d.h" #include "vec2d.h"
#include <gtk/gtk.h> #include <gtk/gtk.h>
@ -15,6 +13,26 @@ class polygon {
std::vector<vec2d> points; std::vector<vec2d> points;
void draw(cairo_t* cr) const; void draw(cairo_t* cr) const;
polygon& set_center(vec2d c) {
center = c;
return *this;
}
polygon& set_angle(double a) {
angle = a;
return *this;
}
polygon& translate(vec2d delta) {
center += delta;
return *this;
}
polygon& rotate(double delta) {
angle += delta;
return *this;
}
}; };
extern polygon* polygons; extern polygon* polygons;
@ -22,7 +40,6 @@ extern uint n_polygons;
extern void polygons_init_state(); extern void polygons_init_state();
extern void polygons_update_state(); extern void polygons_update_state();
// extern void polygon_control (double dx, double dy);
extern void polygons_draw(cairo_t* cr); extern void polygons_draw(cairo_t* cr);
#endif #endif