1 files changed, 117 insertions, 0 deletions

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+#include "player_physics.h"
+#include "muxer.h"
+#include "game.h"
+
+#define JUMP_VELOCITY(h, l) (-2 * (h) / (l))
+#define JUMP_GRAVITY(h, l) (2 * ((h) / (l)) / (l))
+
+PlayerPhysicsComponent::PlayerPhysicsComponent()
+{
+  jump_velocity = JUMP_VELOCITY(TILE_HEIGHT*4.5, 0.3);
+  jump_gravity = JUMP_GRAVITY(TILE_HEIGHT*4.5, 0.3);
+  jump_gravity_short = JUMP_GRAVITY(TILE_HEIGHT*3.5, 0.233);
+  
+  accel.second = jump_gravity_short;
+}
+
+void PlayerPhysicsComponent::receive(Game&, Entity& entity, const Message& msg)
+{
+  if (msg.type == Message::Type::walkLeft)
+  {
+    velocity.first = -90;
+    direction = -1;
+  } else if (msg.type == Message::Type::walkRight)
+  {
+    velocity.first = 90;
+    direction = 1;
+  } else if (msg.type == Message::Type::stopWalking)
+  {
+    velocity.first = 0.0;
+    direction = 0;
+  } else if (msg.type == Message::Type::stopMovingHorizontally)
+  {
+    velocity.first = 0.0;
+  } else if (msg.type == Message::Type::stopMovingVertically)
+  {
+    velocity.second = 0.0;
+  } else if (msg.type == Message::Type::hitTheGround)
+  {
+    if (isFalling)
+    {
+      playSound("../res/Randomize27.wav", 0.05);
+      isFalling = false;
+    }
+    
+    velocity.second = 0.0;
+  } else if (msg.type == Message::Type::jump)
+  {
+    playSound("../res/Randomize87.wav", 0.25);
+    
+    velocity.second = jump_velocity;
+    accel.second = jump_gravity;
+  } else if (msg.type == Message::Type::stopJump)
+  {
+    accel.second = jump_gravity_short;
+  } else if (msg.type == Message::Type::canDrop)
+  {
+    canDrop = true;
+  } else if (msg.type == Message::Type::cantDrop)
+  {
+    canDrop = false;
+  } else if (msg.type == Message::Type::drop)
+  {
+    if (canDrop)
+    {
+      canDrop = false;
+    } else {
+      entity.position.second = msg.dropAxis - entity.size.second;
+      velocity.second = 0;
+    }
+  } else if (msg.type == Message::Type::die)
+  {
+    frozen = true;
+  } else if (msg.type == Message::Type::stopDying)
+  {
+    frozen = false;
+  }
+}
+
+void PlayerPhysicsComponent::tick(Game& game, Entity& entity, double dt)
+{
+  // If frozen, do nothing
+  if (frozen)
+  {
+    return;
+  }
+  
+  // Continue walking even if blocked earlier
+  if (velocity.first == 0)
+  {
+    if (direction < 0)
+    {
+      velocity.first = -90;
+    } else if (direction > 0)
+    {
+      velocity.first = 90;
+    }
+  }
+  
+  // Increase gravity at the height of jump
+  if ((accel.second == jump_gravity) && (velocity.second >= 0))
+  {
+    accel.second = jump_gravity_short;
+  }
+  
+  // Do the movement
+  std::pair<double, double> old_position = entity.position;
+  PhysicsBodyComponent::tick(game, entity, dt);
+    
+  // Check for collisions
+  game.detectCollision(entity, old_position);
+  
+  // Are we moving due to gravity?
+  if (velocity.second != 0.0)
+  {
+    isFalling = true;
+  }
+}