// Processes whatever power-up/item the player has equipped.
public void ProcessItem(GridLayer grid, AddShadowCopy[] addShadowCopies, ShadowCopy[] shadowCopies, Texture2D tx2ShadowCopy)
{
switch (strItem)
{
case "drk": // If the node contained a dark area, spawn an additional shadow copy.
{
if (addShadowCopies.Contains(null))
{
int intNewCopyIndex;
intNewCopyIndex = Array.IndexOf(addShadowCopies, null);
addShadowCopies[intNewCopyIndex] = new AddShadowCopy();
addShadowCopies[intNewCopyIndex].EntityImage = tx2ShadowCopy;
addShadowCopies[intNewCopyIndex].Initialize(EntityNode);
}
}
strItem = null;
break;
case "bld":
EntityNode.Colour = Color.Red; // Make the colour of the node the player is in red, to show a blade is equipped.
for (int intCopyIndex = 0; intCopyIndex < shadowCopies.GetLength(0); intCopyIndex++)
{
if (shadowCopies[intCopyIndex] != null && EntityNode.Tile.Intersects(shadowCopies[intCopyIndex].EntityNode.Tile))
{ // If a shadow copy exists and it intersects the player, remove the copy.
shadowCopies[intCopyIndex] = null;
strItem = null; // Remove the player's item after use.
}
}
for (int intCopyIndex = 0; intCopyIndex < addShadowCopies.GetLength(0); intCopyIndex++)
{
if (addShadowCopies[intCopyIndex] != null && EntityNode.Tile.Intersects(addShadowCopies[intCopyIndex].EntityNode.Tile))
{ // If a shadow copy exists and it intersects the player, remove the copy.
addShadowCopies[intCopyIndex] = null;
strItem = null; // Remove the player's item after use.
}
}
// if a shadow copy is in the same node as a player with a blade. Remove the shadow copy.
break;
case "lbm": // Casts a light ray where the player is facing from the centre of the player.
LightRay lightBeam = new LightRay(EntityPosition + new Vector2(RectEntityWidth / 2, RectEntityHeight / 2), EntityDirection, 200, grid);
BeamKillCopy(grid, lightBeam, addShadowCopies, shadowCopies); // If the beam intersects a shadow copy, remove it.
break;
case "frt":
intHealth = 1000; // If the player has a fruit, reset the player's health to 100.
strItem = null;
break;
}
}
// Casts light rays in the direction that the shadow copy is facing.
public void CastLightRays(GridLayer grid)
{
// Stores the directions in which light rays should be casted.
Vector2[] v2Directions = new Vector2[3];
// Directions to cast lines in are calculated: direction vector = cos(angle) - sin(angle)
v2Directions[0] = new Vector2((float)Math.Sin(EntityRotation), -(float)Math.Cos(EntityRotation));
v2Directions[0].Normalize(); // Cast a light ray in the direction that the copy is facing.
v2Directions[1] = new Vector2((float)Math.Sin(EntityRotation - 0.5), -(float)Math.Cos(EntityRotation - 0.5));
v2Directions[1].Normalize(); // Cast a light ray to the left of the first one.
v2Directions[2] = new Vector2((float)Math.Sin(EntityRotation + 0.5), -(float)Math.Cos(EntityRotation + 0.5));
v2Directions[2].Normalize(); // Cast a light ray which is to the right of the first one.
// Stores the centre of the shadow copy so that rays can be casted from there.
Vector2 v2CentreOfCopy = EntityPosition + new Vector2(RectEntityWidth / 2, RectEntityHeight / 2);
LRRays = new LightRay[3];
// Create the light rays in the three directions using the constructor of the light ray class.
for (int intRayIndex = 0; intRayIndex < 3; intRayIndex++)
{
LRRays[intRayIndex] = new LightRay(v2CentreOfCopy, v2Directions[intRayIndex], intSight, grid);
}
}
// Checks if a shadow copy is within the range of a light beam and removes it if it is.
public void BeamKillCopy(GridLayer grid, LightRay lightBeam, AddShadowCopy[] addShadowCopies, ShadowCopy[] shadowCopies)
{ // Check each point in the beam, if the point is in the same node as a copy, remove the shadow copy.
foreach (Point point in lightBeam.Points)
{
for (int intCopyIndex = 0; intCopyIndex < shadowCopies.GetLength(0); intCopyIndex++)
{
if (shadowCopies[intCopyIndex] != null && shadowCopies[intCopyIndex].RectEntity.Intersects(grid.GetNode(point).Tile))
{ // Only check and remove the copy if it actually exists.
shadowCopies[intCopyIndex] = null;
strItem = null; // Removes the player's item after use.
}
}
for (int intCopyIndex = 0; intCopyIndex < addShadowCopies.GetLength(0); intCopyIndex++)
{
if (addShadowCopies[intCopyIndex] != null && addShadowCopies[intCopyIndex].RectEntity.Intersects(grid.GetNode(point).Tile))
{ // Only check and remove the copy if it actually exists.
addShadowCopies[intCopyIndex] = null;
strItem = null; // Removes the player's item after use.
}
}
grid.GetNode(point).Colour = Color.White; // Makes any nodes in the beam brighter.
}
}
