redstrate/prism
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SDL backend now provides an accurate delta time

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redstrate 2021-05-11 17:38:09 -04:00
parent fcc3917155
commit fe81222ea7
1 changed files with 13 additions and 5 deletions
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18
platforms/sdl/main.cpp.in
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@ -1,5 +1,6 @@
#include <@APP_INCLUDE@> #include <@APP_INCLUDE@>
#include <engine.hpp> #include <engine.hpp>
#include <chrono>
#include "gfx_vulkan.hpp" #include "gfx_vulkan.hpp"
#include "platform.hpp" #include "platform.hpp"
@ -271,7 +272,7 @@ void platform::mute_output() {}
void platform::unmute_output() {} void platform::unmute_output() {}
int main(int argc, char* argv[]) { int main(int argc, char* argv[]) {
SDL_Init(SDL_INIT_VIDEO); SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
engine = new prism::engine(argc, argv); engine = new prism::engine(argc, argv);
@ -289,6 +290,8 @@ int main(int argc, char* argv[]) {
app_main(engine); app_main(engine);
auto end = std::chrono::high_resolution_clock::now();
while(!engine->is_quitting()) { while(!engine->is_quitting()) {
SDL_Event event = {}; SDL_Event event = {};
while(SDL_PollEvent(&event)) { while(SDL_PollEvent(&event)) {
@ -332,13 +335,18 @@ int main(int argc, char* argv[]) {
if(engine->is_quitting()) if(engine->is_quitting())
break; break;
engine->update(1.0 / 60.0); auto begin = std::chrono::high_resolution_clock::now();
engine->begin_frame(1.0 / 60.0);
for(auto window : windows) float deltatime = (float)std::chrono::duration_cast<std::chrono::nanoseconds>(begin - end).count() / 1000000000ULL;
end = begin;
engine->update(deltatime);
engine->begin_frame(deltatime);
for(auto window : windows)
engine->render(window.identifier); engine->render(window.identifier);
engine->end_frame(); engine->end_frame();
} }
return 0; return 0;