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Mario: better handling of screen resize, when showing FPS consider input handling as well

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This commit is contained in:
zvon 2021-08-06 18:49:58 +02:00
parent 4728056b76
commit d4393ef179
1 changed files with 38 additions and 28 deletions
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64
mario/main.cpp
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@ -26,6 +26,7 @@ std::shared_ptr< SDLPP::Renderer > renderer = nullptr;
std::shared_ptr< SDLPP::TextRenderer > fps = nullptr; std::shared_ptr< SDLPP::TextRenderer > fps = nullptr;
std::shared_ptr< SDLPP::TextRenderer > coins = nullptr; std::shared_ptr< SDLPP::TextRenderer > coins = nullptr;
int coin_count = 0; int coin_count = 0;
int global_frames = 0;
std::vector< std::shared_ptr< MarioBlock > > moving_objects = {}; std::vector< std::shared_ptr< MarioBlock > > moving_objects = {};
@ -77,6 +78,32 @@ void handleKeyUp( SDL_Keycode key ) {
} }
} }
void moveToMarioPosition( SDLPP::Scene &scene,
SDLPP::Vec2D< double > &prev_mario ) {
auto rendDims = renderer->getDoubleDimensions();
if ( leftStop ) {
auto left =
rendDims.getX() < 2.0 ? -( rendDims.getX() - 1 ) / 2.0 - 0.1 : -0.5;
leftStop->setPos( left, 0 );
}
auto mario_pos_difference = prev_mario - mario->getAbsolutePos();
// sometimes there is a concurrency problem and prev_pos == cur_pos, in
// that case move everything so Mario is standing on the left edge of the
// screen
if(mario_pos_difference.getX() < 0.01 && mario_pos_difference.getX() > -0.01) {
// 0.01 is the width of visible leftStop
scene.moveEverything(-(mario->getAbsolutePos().getX() - 0.01), 0);
} else {
scene.moveEverything( mario_pos_difference.getX(), 0 );
}
scene.updateSizeAndPosition();
auto left_stop_rightmost = leftStop->getDoubleRect().first.getX() +
leftStop->getDoubleRect().second.getX();
if ( mario->getPos().getX() < left_stop_rightmost ) {
mario->setPos( left_stop_rightmost, mario->getPos().getY() );
}
}
void pollEvents( SDLPP::Scene &scene ) { void pollEvents( SDLPP::Scene &scene ) {
SDL_Event event; SDL_Event event;
while ( SDLPP::getSDLEvent( event ) ) { while ( SDLPP::getSDLEvent( event ) ) {
@ -94,32 +121,9 @@ void pollEvents( SDLPP::Scene &scene ) {
break; break;
case SDL_WINDOWEVENT: case SDL_WINDOWEVENT:
if ( event.window.event == SDL_WINDOWEVENT_RESIZED ) { if ( event.window.event == SDL_WINDOWEVENT_RESIZED ) {
auto prev_mario_pos = mario->getAbsolutePos();
scene.updateSizeAndPosition(); scene.updateSizeAndPosition();
if ( leftStop ) { moveToMarioPosition( scene, prev_mario_pos );
auto rendDims = renderer->getDoubleDimensions();
auto left = rendDims.getX() < 2.0
? -( rendDims.getX() - 1 ) / 2.0 - 0.1
: -0.5;
leftStop->setPos( left, 0 );
}
auto dimensions = renderer->getDoubleDimensions();
auto leftmost = -( dimensions.getX() - 1 ) / 2.0;
auto rightmost = 1 - leftmost;
auto marioPos = mario->getPos();
if ( marioPos.getX() < leftmost ) {
scene.moveEverything( leftmost - marioPos.getX(), 0 );
update = true;
} else if ( marioPos.getX() > rightmost ) {
scene.moveEverything( marioPos.getX() - rightmost, 0 );
update = true;
}
if ( mario->getPos().getX() <
leftStop->getDoubleRect().first.getX() +
leftStop->getDoubleRect().second.getX() ) {
mario->setPos( leftStop->getDoubleRect().first.getX() +
leftStop->getDoubleRect().second.getX(),
mario->getPos().getY() );
}
} }
default: default:
break; break;
@ -138,7 +142,8 @@ void doInput( std::shared_ptr< SDLPP::Scene > scene ) {
scene->updateScene(); scene->updateScene();
auto prev_coin_count = coin_count; auto prev_coin_count = coin_count;
// TODO visit all moving objects // TODO visit all moving objects
auto visitor = getVisitor(*mario, *scene, quit, coin_count, moving_objects); auto visitor =
getVisitor( *mario, *scene, quit, coin_count, moving_objects );
scene->visitCollisions( *mario, *visitor ); scene->visitCollisions( *mario, *visitor );
mario->handleVisitor( *visitor ); mario->handleVisitor( *visitor );
@ -155,7 +160,8 @@ void doInput( std::shared_ptr< SDLPP::Scene > scene ) {
( playerX > rightBarrier && rightmostX > width ) * ( playerX > rightBarrier && rightmostX > width ) *
( rightBarrier - playerX ) / width, ( rightBarrier - playerX ) / width,
0 ); 0 );
update = true; update = playerX > rightBarrier && rightmostX > width;
global_frames++;
} }
} }
@ -257,6 +263,10 @@ int main() {
renderer->presentRenderer(); renderer->presentRenderer();
frames++; frames++;
if ( SDL_GetTicks() - base >= 1000 ) { if ( SDL_GetTicks() - base >= 1000 ) {
if ( global_frames < frames ) {
frames = global_frames;
}
global_frames = 0;
fps->changeText( std::to_string( frames ) + " fps" ); fps->changeText( std::to_string( frames ) + " fps" );
frames = 0; frames = 0;
base = SDL_GetTicks(); base = SDL_GetTicks();