//draw the current range of the player's jump by drawing a grid of dots to the screen
//each dot it white if it cannot be jumped to and black if it can
//This method DOES take into account collisions with rigidbodies
private void DrawJumpRange(Graphics displayDevice)
{
Physics.RigidBody temp = new Physics.RigidBody();
temp.Shape = new Physics.Circle(7);
temp.SetPosition(new Physics.Vector2D());
//draw a grid of dots 40 units apart
for (int i = -700; i < 700; i += 40)
{
for (int j = -360; j < 400; j += 40)
{
//calculate the position of the dot
temp.Position.X = playerCharacter.playerBody.Position.X + i;
temp.Position.X -= temp.Position.X % 40;
temp.Position.Y = playerCharacter.playerBody.Position.Y + j;
temp.Position.Y -= temp.Position.Y % 40;
//set colour based on ability to jump to calculated position
if (physEng.CanPlayerJumpFromTo(playerCharacter, playerCharacter.playerBody.Position, temp.Position))
{
temp.Shape.mColor = Color.Black;
}
else
{
temp.Shape.mColor = Color.White;
}
//draw a dot at that position
mRenderer.Draw(temp, displayDevice);
}
}
}
//check to see if the player could jump or fall between the provided nodes
private static CONNECTION_TYPE GetConnectionBetween(NODE_TYPE sourceNodeType, NODE_TYPE destNodeType, Physics.Vector2D sourceNodePosition, Physics.Vector2D destinationNodePosition)
{
//a fall node should never be the destination of a jump or a fall, just the sourcepoint for a fall
if (destNodeType == NODE_TYPE.FALL)
{
return(CONNECTION_TYPE.NONE);
}
Physics.Player examplePlayer = new Physics.Player();
Physics.PhysicsEngine physEng = Physics.PhysicsEngine.GetPhysicsEngine();
//if a fall connection is possible, return it
if ((sourceNodeType == NODE_TYPE.FALL ||
sourceNodeType == NODE_TYPE.WALL) &&
physEng.CanPlayerFallFromTo(examplePlayer, sourceNodePosition, destinationNodePosition))
{
return(CONNECTION_TYPE.FALL);
}
//if a jump connection is possible, return it
if ((sourceNodeType == NODE_TYPE.FLOOR ||
sourceNodeType == NODE_TYPE.WALL) &&
physEng.CanPlayerJumpFromTo(examplePlayer, sourceNodePosition, destinationNodePosition))
{
return(CONNECTION_TYPE.JUMP);
}
return(CONNECTION_TYPE.NONE);
}
//jumping is only possible if the player is colliding with something and the jump arc is allowed by the physics engine
private bool CanBecomeJumping()
{
if (currentNode == null)
{
return(false);
}
if (destinationNode == null)
{
return(false);
}
//can't jump if the player isn't colliding with anything
if (AIPlayer.playerBody.collisionNormal == null)
{
return(false);
}
//can only jump if the jump path from the start to the end is possible
if (physEng.CanPlayerJumpFromTo(AIPlayer, AIPlayer.playerBody.Position, mainGraph.topLevelNode.GetNodePosition(destinationNode)))
{
return(true);
}
//if in doubt, no jumping
return(false);
}