protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if ((keyboardStateCurrent.IsKeyUp(Keys.Escape) && keyboardStatePrevious.IsKeyDown(Keys.Escape)) || GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
{
this.Exit();
}
// Update keyboard state
keyboardStatePrevious = keyboardStateCurrent;
keyboardStateCurrent = Keyboard.GetState();
// Update mouse state
mouseStatePrevious = mouseStateCurrent;
mouseStateCurrent = Mouse.GetState();
player.Update(gameTime, keyboardStateCurrent, keyboardStatePrevious, mouseStateCurrent, mouseStatePrevious, agentAIList, windowWidth, windowHeight);
// Create new agent on mouse click
if (mouseStateCurrent.LeftButton == ButtonState.Pressed && mouseStatePrevious.LeftButton != ButtonState.Pressed)
{
// Create a new agent at mouse location
GameAgent agent = new GameAgent();
agent.LoadContent(this.Content, "Images\\agent");
agent.Position = new Vector2(mouseStateCurrent.X, mouseStateCurrent.Y);
agent.Rotation = 0.0f;
agentAIList.Add(agent);
agent.Type = (int)Enums.AgentType.NPC;
}
base.Update(gameTime);
}
private bool IsInAgentSensorRange(GameAgent agent, Vector2 playerPos, Vector2 endPoint1, Vector2 endPoint2)
{
Rectangle agentBounds = agent.Bounds;
// getting the 4 points of the agent
Vector2 bottomLeft = new Vector2(agentBounds.Left, agentBounds.Top);
Vector2 bottomRight = new Vector2(agentBounds.Left + agentBounds.Width, agentBounds.Top);
Vector2 topLeft = new Vector2(agentBounds.Left, agentBounds.Top + agentBounds.Height);
Vector2 topRight = new Vector2(bottomRight.X, topLeft.Y);
return
(IsPointInTriangle(bottomLeft, playerPos, endPoint1, endPoint2) ||
IsPointInTriangle(bottomRight, playerPos, endPoint1, endPoint2) ||
IsPointInTriangle(topLeft, playerPos, endPoint1, endPoint2) ||
IsPointInTriangle(topRight, playerPos, endPoint1, endPoint2));
}
private bool CheckIntersection(GameAgent agent, bool isVerticalLine, float slope, float offset, Vector2 rfStartPoint, Vector2 rfEndPoint)
{
// NOTE: drawing lines backwards so that higher values are always on the top and right
// making it easier for calculation.
Rectangle agentBounds = agent.Bounds;
Vector2 bottomLeft = new Vector2(agentBounds.Left, agentBounds.Top);
Vector2 bottomRight = new Vector2(agentBounds.Left + agentBounds.Width, agentBounds.Top);
Vector2 topLeft = new Vector2(agentBounds.Left, agentBounds.Top + agentBounds.Height);
Vector2 topRight = new Vector2(bottomRight.X, topLeft.Y);
return
(IsLineIntersection(topLeft, topRight, isVerticalLine, slope, offset, rfStartPoint, rfEndPoint) ||
IsLineIntersection(bottomLeft, bottomRight, isVerticalLine, slope, offset, rfStartPoint, rfEndPoint) ||
IsLineIntersection(bottomLeft, topLeft, isVerticalLine, slope, offset, rfStartPoint, rfEndPoint) ||
IsLineIntersection(bottomRight, topRight, isVerticalLine, slope, offset, rfStartPoint, rfEndPoint));
}