/// <summary>
/// Handles input, performs physics, and animates the player sprite.
/// </summary>
public void Update(TimeSpan frameStepTime, Vector2 moveVector, ChunkManager chunks)
{
DoPhysics(frameStepTime, moveVector, chunks);
playerData.orientation = (float)Math.Atan2(-moveVector.Y, moveVector.X);
if (isOnGround) // && IsAlive
{
// TODO: animations
}
// Clear input.
movement = Vector2.Zero;
// Update transform matrix and bounding box
worldTransform =
Matrix.CreateTranslation(-bBoxCenter) *
Matrix.CreateScale(0.125f) *
Matrix.CreateRotationY(playerData.orientation) *
Matrix.CreateTranslation(playerData.position);
mesh.bBox = playerBounds;
isJumping = false;
}
/// <summary>
/// Calculates the Y velocity accounting for jumping and
/// animates accordingly.
/// </summary>
/*private void DoJump(TimeSpan frameStepTime)
* {
* // If the player wants to jump
* if (isJumping)
* {
* // Begin or continue a jump
* if ((!wasJumping && isOnGround) || jumpTime > 0.0f)
* {
* //if (jumpTime == 0.0f)
* // jumpSound.Play();
*
* jumpTime += (float)frameStepTime.TotalSeconds;
* //sprite.PlayAnimation(jumpAnimation);
* }
*
* // If we are in the ascent of the jump
* if (0.0f < jumpTime && jumpTime <= MaxJumpTime)
* {
* // Fully override the vertical velocity with a power curve that gives players more control over the top of the jump
* velocity.Y = JumpLaunchVelocity * (1.0f - (float)Math.Pow(jumpTime / MaxJumpTime, JumpControlPower));
* }
* else
* {
* // Reached the apex of the jump
* jumpTime = 0.0f;
* }
* }
* else
* {
* // Continues not jumping or cancels a jump in progress
* jumpTime = 0.0f;
* }
* wasJumping = isJumping;
* }*/
/// <summary>
/// Detects and resolves collisions from neighboring blocks.
/// </summary>
private List <BoundingBox> HandleCollisions(ChunkManager chunks)
{
playerBounds.Min = playerData.position + localBounds.Min;
playerBounds.Max = playerData.position + localBounds.Max;
BoundingBox bounds = playerBounds;
int leftBlock = (int)Math.Floor(bounds.Min.X);
int rightBlock = (int)Math.Ceiling(bounds.Max.X);
int bottomBlock = (int)Math.Floor(bounds.Min.Y);
int topBlock = (int)Math.Ceiling(bounds.Max.Y);
int backBlock = (int)Math.Floor(bounds.Min.Z);
int frontBlock = (int)Math.Ceiling(bounds.Max.Z);
BoundingBox blockBounds = new BoundingBox();
collidedBlocks.Clear();
Vector3 position = playerData.position;
BlockType block = BlockType.Empty;
// For each potentially colliding block
for (int y = bottomBlock; y < topBlock; ++y)
{
for (int x = leftBlock; x < rightBlock; ++x)
{
for (int z = backBlock; z < frontBlock; ++z)
{
block = (BlockType)chunks.GetVoxelAt(x - 1, y, z - 1);
// Check only non-empty blocks
if (block != BlockType.Empty)
{
blockBounds.Min = new Vector3(x, y, z); // +localBounds.Min;
blockBounds.Max = new Vector3(x + 1, y + 1, z + 1); // +localBounds.Max;
//float intDepth = blockBounds.Intersects(position, position);
Vector3 depth = blockBounds.GetIntersectionDepth(bounds);
// Resolve the collision along the Y axis.
if (depth != Vector3.Zero)
{
collidedBlocks.Add(blockBounds);
float absDepthX = Math.Abs(depth.X);
float absDepthY = Math.Abs(depth.Y);
float absDepthZ = Math.Abs(depth.Z);
float smallestDepth = (absDepthX < absDepthY) ? absDepthX : absDepthY;
smallestDepth = (absDepthZ < smallestDepth) ? absDepthZ : smallestDepth;
// Resolve the collision along the shallow axis.
if (smallestDepth != absDepthY)
{
// Resolve the collision along the X axis
if (absDepthX < absDepthZ)
{
position = new Vector3(position.X - depth.X, position.Y, position.Z);
}
// Resolve the collision along the Z axis
if (absDepthZ < absDepthX)
{
position = new Vector3(position.X, position.Y, position.Z - depth.Z);
}
// Keep calculating collision with new bounds
playerBounds.Min = position + localBounds.Min;
playerBounds.Max = position + localBounds.Max;
bounds = playerBounds;
}
else
{
if (velocity.Y != 0f)
{
// Resolve the collision along the Y axis
position = new Vector3(position.X, position.Y - depth.Y, position.Z);
velocity.Y = 0f;
// Keep calculating collision with new bounds
playerBounds.Min = position + localBounds.Min;
playerBounds.Max = position + localBounds.Max;
bounds = playerBounds;
}
}
}
}
// Finish checking this block
}
}
}
playerData.position = position;
// Finish checking collisions
return(collidedBlocks);
}