Mario: simple jump

mario/main.cpp

@@ -35,6 +35,7 @@ void handleKeyDown( SDL_Keycode key, SDLPP::Scene &scene ) {
         break;
     case SDLK_SPACE:
     case SDLK_w:
+        mario->jump();
         break;
     case SDLK_s:
         break;
@@ -54,8 +55,9 @@ void handleKeyUp( SDL_Keycode key ) {
     case SDLK_d:
         mario->walkLeft();
         break;
+    case SDLK_SPACE:
     case SDLK_w:
-    case SDLK_s:
+        mario->stopJump();
     default:
         break;
     }

mario/mario.cpp

@@ -45,9 +45,25 @@ void Mario::setStanding() {
 
 void Mario::handleVisitor(MarioVisitor &visitor, SDLPP::Vec2D<double> previous_position) {
     // handle gravity
-    if ( !visitor.isOnGround() ) {
+    // TODO - https://haydnscarlett.wordpress.com/2020/07/30/marios-jump/
+    if (jumping) {
+        if(stop_jump && getPos().getY() - min_jump < 0.05) {
+            jumping = false;
+            resetMovementY();
+        } else if( getPos().getY() - max_jump < 0.05 ) {
+            std::cout << "jumping end" << std::endl;
+            std::cout << "MAX: " << max_jump << ", MY: " << getPos().getY() << std::endl;
+            jumping = false;
+            resetMovementY();
+        } else if ( getPos().getY() - slow_jump < 0.05 && getMovement().getY() < -1*jump_movement/5 ) {
+            std::cout << "Slowing down" << std::endl;
+            addMovement(0, jump_movement/50);
+        }
+    }
+    on_ground = visitor.isOnGround();
+    if ( !on_ground && !jumping ) {
         setMovement( getMovement().getX(), fall_movement );
-    } else {
+    } else if(!jumping) {
         resetMovementY();
         setPos(getPos().getX(), visitor.getGroundY() - BLOCK_SIZE);
     }
@@ -58,3 +74,20 @@ void Mario::handleVisitor(MarioVisitor &visitor, SDLPP::Vec2D<double> previous_p
         setPos( previous_position.getX(), getPos().getY() );
     }
 }
+
+void Mario::jump() {
+    if(!on_ground)
+        return;
+    std::cout << "JUMP!" << std::endl;
+    jumping = true;
+    stop_jump = false;
+    max_jump = getPos().getY() - 3*BLOCK_SIZE;
+    min_jump = getPos().getY() - 1*BLOCK_SIZE;
+    slow_jump = getPos().getY() - 2*BLOCK_SIZE;
+    setMovement( getMovement().getX(), -jump_movement );
+}
+
+void Mario::stopJump() {
+    std::cout << "STOP JUMP!" << std::endl;
+    stop_jump = true;
+}

mario/mario.hpp

@@ -11,10 +11,19 @@ public:
     void walkRight();
     void setStanding();
     void handleVisitor(MarioVisitor &visitor, SDLPP::Vec2D<double> previous_position);
+    void jump();
+    void stopJump();
 private:
     bool faces_right = true;
     double side_movement = 0.8;
     double fall_movement = 1;
+    double jump_movement = 1.5;
+    bool jumping = false;
+    bool stop_jump = false;
+    double max_jump = 0;
+    double min_jump = 0;
+    double slow_jump = 0;
+    bool on_ground = true;
 };
 
 #endif