Added a generator for polygons to make the init easier

This commit is contained in:
Karma Riuk 2023-03-14 23:10:31 +01:00
parent 48a1b3ade4
commit e6a3979de1
4 changed files with 63 additions and 9 deletions

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@ -11,7 +11,7 @@ CXXFLAGS=-Wall -g -O2 $(PROFILING_CFLAGS) $(GTK_CFLAGS)
LIBS=$(GTK_LIBS) -lm
PROGS=balls
OBJS=balls.o c_index.o game.o gravity.o spaceship.o main.o polygons.o
OBJS=balls.o c_index.o game.o gravity.o spaceship.o main.o polygons.o polygon_generator.o
# dependencies (gcc -MM *.cc)
balls.o: balls.cc game.h balls.h vec2d.h gravity.h
@ -21,6 +21,9 @@ gravity.o: gravity.cc gravity.h balls.h vec2d.h game.h
main.o: main.cc game.h balls.h vec2d.h c_index.h gravity.h spaceship.h
spaceship.o: spaceship.cc balls.h vec2d.h game.h
stats.o: stats.cc
polygons.o: polygons.cc polygons.h vec2d.h polygon_generator.h
polygon_generator.o: polygon_generator.cc polygon_generator.h
.PHONY: run
run: balls

29
polygon_generator.cc Normal file
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@ -0,0 +1,29 @@
#include "polygon_generator.h"
#include <cassert>
#include <cmath>
#define PI 3.141592653589793238462643323
static double to_rad(double angle_in_deg) {
static double PI_180 = PI / 180;
return angle_in_deg * PI_180;
}
polygon poly_generate::rectangle(double width, double height) {
assert(width > 0);
assert(height > 0);
return polygon{
{0, 0}, 0, {{0, 0}, {width, 0}, {width, height}, {0, height}}};
}
polygon poly_generate::triangle(double side1, double side2, double angle) {
assert(side1 > 0);
assert(side2 > 0);
return polygon{{0, 0},
0,
{{0, 0},
{side1, 0},
{side2 * std::cos(to_rad(angle)),
side2 * std::sin(to_rad(angle))}}};
}

20
polygon_generator.h Normal file
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@ -0,0 +1,20 @@
#ifndef POLYGON_GENERATOR_H_INCLUDED
#define POLYGON_GENERATOR_H_INCLUDED
#include "polygons.h"
#include <cassert>
namespace poly_generate {
polygon rectangle(double width, double height);
inline polygon square(double width) {
assert(width > 0);
return rectangle(width, width);
};
polygon triangle(double side1, double side2, double angle);
}; // namespace poly_generate
#endif

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@ -1,26 +1,28 @@
#include "polygons.h"
#include "polygon_generator.h"
#include <iostream>
polygon* polygons = nullptr;
uint n_polygons = 1;
uint n_polygons = 3;
void polygons_init_state() {
polygons = new polygon[n_polygons];
polygon poly =
polygon{{400, 400}, 0, {{-50, -50}, {50, -50}, {50, 50}, {-50, 50}}};
polygons[0] = poly;
polygons[0] = poly_generate::triangle(200, 200, 30).set_center({300, 200});
polygons[1] = poly_generate::square(200).set_center({100, 400});
polygons[2] = poly_generate::rectangle(200, 100).set_center({400, 400});
}
void polygon::draw(cairo_t* cr) const {
polygon& poly = polygons[0];
vec2d& center = poly.center;
const vec2d& center = this->center;
cairo_set_source_rgb(cr, 1, 1, 1);
for (auto& point : poly.points)
for (auto& point : this->points)
cairo_line_to(cr, center.x + point.x, center.y + point.y);
cairo_line_to(cr, center.x + poly.points[0].x, center.y + poly.points[0].y);
cairo_line_to(
cr, center.x + this->points[0].x, center.y + this->points[0].y);
cairo_stroke(cr);
}