Control pause and speed with keyboard
Keys: space for toggle pause, < and > for speed control, 0 to reset speed
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parent
8bd230c010
commit
baaa5e4057
5 changed files with 54 additions and 1 deletions
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@ -54,6 +54,7 @@ int main(int argc, char** argv) {
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}
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render.set_idle_func(periodic_update);
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render.add_kb_handler(periodic_kb_handler);
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init_periodic_static(&ball);
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render.run();
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@ -8,6 +8,9 @@ static Ball* _ball = nullptr;
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static std::chrono::time_point<std::chrono::steady_clock>
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_last_time, _init_clocks;
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static bool is_paused = false;
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static double speed_factor = 1.;
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void init_periodic_static(Ball* ball) {
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_last_time = std::chrono::steady_clock::now();
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_init_clocks = std::chrono::steady_clock::now();
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@ -23,9 +26,32 @@ double ellapsed_double(
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}
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void periodic_update() {
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if(is_paused)
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return;
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printf("%lf\n", speed_factor);
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auto now = std::chrono::steady_clock::now();
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_ball->update_pos(ellapsed_double(_last_time, now));
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_ball->update_pos(speed_factor * ellapsed_double(_last_time, now));
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_last_time = now;
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glutPostRedisplay();
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}
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void periodic_kb_handler(unsigned char key, int, int) {
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if(key == ' ') {
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if(is_paused)
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_last_time = std::chrono::steady_clock::now();
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is_paused = !is_paused;
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}
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else if(key == '<') {
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speed_factor -= .1;
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if(speed_factor <= 0.05)
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speed_factor = .1;
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}
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else if(key == '>') {
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speed_factor += .1;
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}
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else if(key == '0') {
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speed_factor = 1.;
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}
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}
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@ -4,3 +4,5 @@
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void init_periodic_static(Ball* ball);
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void periodic_update();
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void periodic_kb_handler(unsigned char key, int, int);
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@ -29,6 +29,7 @@ void GlutRender::init(int* argc, char** argv,
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// ==== Callbacks ====
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glutDisplayFunc(display_handle);
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glutReshapeFunc(reshape_handle);
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glutKeyboardFunc(kb_evt_handle);
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// ==== Lighting ====
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GLfloat light0_pos[] = {30., 35., 20., 0.};
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@ -92,6 +93,10 @@ void GlutRender::set_idle_func(void (*func)(void)) {
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glutIdleFunc(func);
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}
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void GlutRender::add_kb_handler(GlutRender::kb_handler_t handler) {
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kb_handlers.push_back(handler);
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}
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void GlutRender::reshape(int wid, int hei) {
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if (hei == 0)
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hei = 1;
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@ -202,9 +207,18 @@ void GlutRender::display() {
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glutSwapBuffers();
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}
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void GlutRender::on_kb_evt(unsigned char key, int x, int y) {
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for(auto& handler: kb_handlers) {
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handler(key, x, y);
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}
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}
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void GlutRender::reshape_handle(int wid, int hei) {
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get_instance().reshape(wid, hei);
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}
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void GlutRender::display_handle() {
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get_instance().display();
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}
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void GlutRender::kb_evt_handle(unsigned char key, int x, int y) {
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get_instance().on_kb_evt(key, x, y);
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}
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@ -5,9 +5,12 @@
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#include "../Mesh.hpp"
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#include "../Implicit.hpp"
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#include <set>
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#include <functional>
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class GlutRender {
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public:
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typedef std::function<void(unsigned char, int, int)> kb_handler_t;
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static GlutRender& get_instance();
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GlutRender(GlutRender const&) = delete;
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@ -25,6 +28,8 @@ class GlutRender {
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void set_idle_func(void (*func)(void));
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void add_kb_handler(kb_handler_t handler);
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private:
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struct SurfaceDetails {
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SurfaceDetails(ImplicitSurface* surf, const Cuboid& box,
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@ -49,13 +54,18 @@ class GlutRender {
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protected:
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void reshape(int wid, int hei);
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void display();
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void on_kb_evt(unsigned char key, int x, int y);
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static void reshape_handle(int wid, int hei);
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static void display_handle();
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static void kb_evt_handle(unsigned char key, int x, int y);
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private: //attr
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std::function<double()> rand_color;
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std::set<Mesh*> meshes;
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std::set<SurfaceDetails> surfaces;
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std::vector<kb_handler_t> kb_handlers;
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};
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