/// <summary>
/// Fires a projectile at the specific point, which is a world cordinate
/// </summary>
/// <param name="point">The point at which to fire a projectile</param>
public void spawnProjectile(Vector3 point) {
//Move the calculation into the x plane for simplicity
Vector3 projDir = new Vector3((float)Math.Sqrt(Math.Pow(point.X - boss.location.X, 2) + Math.Pow(point.Z - boss.location.Z, 2)),
(point.Y - boss.location.Y), 0.0f);
double gravity = GameObject.gravity;
//Following is adapted from http://en.wikipedia.org/wiki/Trajectory_of_a_projectile#Angle_required_to_hit_coordinate_.28x.2Cy.29
double velsquared = barrelProp.speed * barrelProp.speed;
double sqrtPart = -Math.Sqrt(velsquared * velsquared - gravity * (gravity * projDir.X * projDir.X + 2 * projDir.Y * velsquared));
double theta;
if(sqrtPart == sqrtPart) { //false when sqrtPart == NaN
theta = Math.Atan((velsquared - sqrtPart) / (gravity * projDir.X));
} else {
//Calculate how far in that direction we can get
if(projDir.X == 0) { //Avoid divide by zero
theta = Math.PI / 2;
} else {
double phi = Math.Atan(projDir.Y / projDir.X);
double cosphi = Math.Cos(phi);
double r = (gravity * velsquared * (1 - Math.Sin(phi))) / (gravity * gravity * cosphi * cosphi);
r -= 0.01f; //This prevents a floating point roundoff bug
projDir.X = (float)(r * cosphi);
projDir.Y = (float)(r * Math.Sin(phi));
sqrtPart = -Math.Sqrt(velsquared * velsquared - gravity * (gravity * projDir.X * projDir.X + 2 * projDir.Y * velsquared));
theta = Math.Atan((velsquared - sqrtPart) / (gravity * projDir.X));
}
}
projDir.X = (float)Math.Cos(theta);
projDir.Y = (float)Math.Sin(theta);
//Take the x coordinate and restore it to the proper x/z direction
double phi2 = Math.Atan((point.X - boss.location.X) / (point.Z - boss.location.Z));
if(point.Z < boss.location.Z) {
phi2 += Math.PI;
}
projDir.Z = (float)(projDir.X * Math.Cos(phi2));
projDir.X = (float)(projDir.X * Math.Sin(phi2));
Vector3 projlocation = new Vector3(boss.location);
//break the rendering tie between boss and projectile, or else they flicker
projlocation.Z -= 0.001f;
Projectile shot = new Projectile(projlocation, projDir, false, barrelProp, ps.player, (int)CombatType.barrel); // spawn the actual projectile
if(ps.enable3d) {
shot.cycleNumber = 1;
}
// add projectile to appropriate lists
ps.objList.Add(shot);
ps.renderList.Add(shot);
ps.collisionList.Add(shot);
ps.physList.Add(shot);
ps.combatList.Add(shot);
}
public void update(double time, PlayState playstate, Vector3 playerposn, Enemy me, bool enable3d, List<PhysicsObject> physList) {
//update current animation
me.cycleNumber = (int)(enable3d ? KidAnim.stand3d : KidAnim.stand2d);
//Flip scale if necessary
if(!enable3d) {
if((me.location.X < playerposn.X && me.scale.X > 0) || (me.location.X > playerposn.X && me.scale.X < 0)) {
me.scale = new Vector3(-me.scale.X, me.scale.Y, me.scale.Z);
}
} else { // 3D
if(me.scale.X < 0) {
me.scale = new Vector3(-me.scale.X, me.scale.Y, me.scale.Z);
}
}
if (!me.frozen) {
if (VectorUtil.dist(playerposn, me.location) <= 90) {
if (me.attackdelayed)
me.attacktimer = me.attacktimer + time;
if (me.attacktimer > me.attackspeed) {
me.attackdelayed = false;
me.attacktimer = 0;
}
if (!me.attackdelayed) {
Vector3 dir = VectorUtil.getdir(playerposn, me.location);
//throw icecream
Vector3 projlocation = me.location;
Vector3 direction = VectorUtil.getdir(playerposn, me.location);
if (!enable3d) {
projlocation.Z += 0.001f; //break the rendering tie between enemy and projectile, or else they flicker
}
else {
direction.Z = 0.0f;
direction.NormalizeFast();
}
Projectile shot = new Projectile(projlocation, direction, false, me.projectile, playstate.player);
//Projectile shot = new Projectile(projlocation, direction, new Vector3(12.5f, 12.5f, 12.5f), new Vector3(6.25f, 6.25f, 6.25f), new Vector3(6.25f, 6.25f, 6.25f), true, true, playstate.enable3d, me.damage, 150, false, false, me.projectileSprite);
playstate.objList.Add(shot);
playstate.renderList.Add(shot);
playstate.collisionList.Add(shot);
playstate.physList.Add(shot);
playstate.combatList.Add(shot);
me.attackdelayed = true;
}
}
else
me.ChangeState(new Kidmoveto());
}
}
public virtual void update(double time, PlayState playstate, Vector3 playerposn, bool enable3d) {
if(prefalling) {
if((mybox.location.Y - mybox.pbox.Y) <= preHeight) {
setPosition(new Vector3(mybox.location.X, preHeight, mybox.location.Z));
velocity = mybox.velocity = myRope.velocity = new Vector3(0, 0, 0);
pretimer = pretimer + time;
if(pretimer >= pretime) {
pretimer = 0;
falling = true;
prefalling = false;
velocity = mybox.velocity = myRope.velocity = new Vector3(0, -200, 0);
Projectile shot = new Projectile(new Vector3(mybox.location.X, preHeight - 0.12f, mybox.location.Z), new Vector3(0, -1, 0), false, projectile, playstate.player); // spawn the actual projectile
shot.type = (int)CombatType.squish;
// add projectile to appropriate lists
playstate.objList.Add(shot);
playstate.renderList.Add(shot);
playstate.collisionList.Add(shot);
playstate.physList.Add(shot);
playstate.combatList.Add(shot);
}
}
}
if(falling) {
if(mybox.velocity.Y == 0.0f) { //Wait for physics to stop the crate
setPosition(new Vector3(mybox.location.X, minHeight, mybox.location.Z));
velocity = mybox.velocity = myRope.velocity = new Vector3(0, 0, 0);
downtimer = downtimer + time;
if(downtimer >= downtime) {
downtimer = 0;
falling = false;
rising = true;
velocity = mybox.velocity = myRope.velocity = new Vector3(0, 80, 0);
shadowtimer = 1.25;
}
}
}
if(rising) {
if(mybox.location.Y - mybox.pbox.Y >= maxHeight) {
setPosition(new Vector3(mybox.location.X, maxHeight, mybox.location.Z));
velocity = mybox.velocity = myRope.velocity = new Vector3(0, 0, 0);
rising = false;
idle = true;
}
}
//Update shadow
if(prefalling || falling) { //Shadow increasing
shadowtimer += time;
myGround.frame3d = Math.Min((int)(shadowtimer * 22.0), 11);
} else if(rising) { //Shadow decreasing
shadowtimer -= time;
myGround.frame3d = Math.Min((int)(shadowtimer * 22.0), 11);
} else { //No shadow
myGround.frame3d = 0;
}
}
/// <summary>
/// Spawns the players projectile in the param direction
/// </summary>
/// <param name="playstate">a pointer to play state, for accessing the obj lists in playstate</param>
/// <param name="direction">The direction to fire the projectile in</param>
private void spawnProjectile(Vector3 direction) {
Vector3 projlocation = new Vector3(location);
//break the rendering tie between player and projectile, or else they flicker
if(!enable3d) {
projlocation.Z += 0.001f;
}
Projectile shot = new Projectile(projlocation, direction, true, curProjectile, playstate.player); // spawn the actual projectile
//shot.accelerate(new Vector3(velocity.X, 0.0f, velocity.Z)); //account for player's current velocity
// add projectile to appropriate lists
playstate.objList.Add(shot);
playstate.renderList.Add(shot);
playstate.collisionList.Add(shot);
playstate.physList.Add(shot);
playstate.combatList.Add(shot);
}