Control pause and speed with keyboard

Keys: space for toggle pause, < and > for speed control, 0 to reset
speed
This commit is contained in:
Théophile Bastian 2018-02-14 11:18:36 +01:00
parent 8bd230c010
commit baaa5e4057
5 changed files with 54 additions and 1 deletions

View file

@ -54,6 +54,7 @@ int main(int argc, char** argv) {
}
render.set_idle_func(periodic_update);
render.add_kb_handler(periodic_kb_handler);
init_periodic_static(&ball);
render.run();

View file

@ -8,6 +8,9 @@ static Ball* _ball = nullptr;
static std::chrono::time_point<std::chrono::steady_clock>
_last_time, _init_clocks;
static bool is_paused = false;
static double speed_factor = 1.;
void init_periodic_static(Ball* ball) {
_last_time = std::chrono::steady_clock::now();
_init_clocks = std::chrono::steady_clock::now();
@ -23,9 +26,32 @@ double ellapsed_double(
}
void periodic_update() {
if(is_paused)
return;
printf("%lf\n", speed_factor);
auto now = std::chrono::steady_clock::now();
_ball->update_pos(ellapsed_double(_last_time, now));
_ball->update_pos(speed_factor * ellapsed_double(_last_time, now));
_last_time = now;
glutPostRedisplay();
}
void periodic_kb_handler(unsigned char key, int, int) {
if(key == ' ') {
if(is_paused)
_last_time = std::chrono::steady_clock::now();
is_paused = !is_paused;
}
else if(key == '<') {
speed_factor -= .1;
if(speed_factor <= 0.05)
speed_factor = .1;
}
else if(key == '>') {
speed_factor += .1;
}
else if(key == '0') {
speed_factor = 1.;
}
}

View file

@ -4,3 +4,5 @@
void init_periodic_static(Ball* ball);
void periodic_update();
void periodic_kb_handler(unsigned char key, int, int);

View file

@ -29,6 +29,7 @@ void GlutRender::init(int* argc, char** argv,
// ==== Callbacks ====
glutDisplayFunc(display_handle);
glutReshapeFunc(reshape_handle);
glutKeyboardFunc(kb_evt_handle);
// ==== Lighting ====
GLfloat light0_pos[] = {30., 35., 20., 0.};
@ -92,6 +93,10 @@ void GlutRender::set_idle_func(void (*func)(void)) {
glutIdleFunc(func);
}
void GlutRender::add_kb_handler(GlutRender::kb_handler_t handler) {
kb_handlers.push_back(handler);
}
void GlutRender::reshape(int wid, int hei) {
if (hei == 0)
hei = 1;
@ -202,9 +207,18 @@ void GlutRender::display() {
glutSwapBuffers();
}
void GlutRender::on_kb_evt(unsigned char key, int x, int y) {
for(auto& handler: kb_handlers) {
handler(key, x, y);
}
}
void GlutRender::reshape_handle(int wid, int hei) {
get_instance().reshape(wid, hei);
}
void GlutRender::display_handle() {
get_instance().display();
}
void GlutRender::kb_evt_handle(unsigned char key, int x, int y) {
get_instance().on_kb_evt(key, x, y);
}

View file

@ -5,9 +5,12 @@
#include "../Mesh.hpp"
#include "../Implicit.hpp"
#include <set>
#include <functional>
class GlutRender {
public:
typedef std::function<void(unsigned char, int, int)> kb_handler_t;
static GlutRender& get_instance();
GlutRender(GlutRender const&) = delete;
@ -25,6 +28,8 @@ class GlutRender {
void set_idle_func(void (*func)(void));
void add_kb_handler(kb_handler_t handler);
private:
struct SurfaceDetails {
SurfaceDetails(ImplicitSurface* surf, const Cuboid& box,
@ -49,13 +54,18 @@ class GlutRender {
protected:
void reshape(int wid, int hei);
void display();
void on_kb_evt(unsigned char key, int x, int y);
static void reshape_handle(int wid, int hei);
static void display_handle();
static void kb_evt_handle(unsigned char key, int x, int y);
private: //attr
std::function<double()> rand_color;
std::set<Mesh*> meshes;
std::set<SurfaceDetails> surfaces;
std::vector<kb_handler_t> kb_handlers;
};