Two Problems Rotating and collision detection help

[jaferris]

hey i am creating a similar pacman game and i can move the monster UP, Down, Left and Right

What i am trying to do is when moving down how do i make it soo the mouth will face down too same as going left and up.

Other problem is how do i make the object i hit dissapear the collision detection

Sorry if posting in wrong area but any code will be helpfull

here is a sample of the direction code

switch (monsterDirection)
{
case Input.DOWN:
// monster is moving right, increase its X-coordinate
monsterYPos = monsterYPos + monsterSpeed;
if (monsterYPos > (boardWidth - monsterSize)) // has the monster hit the right wall?
{
monsterYPos = boardWidth - monsterSize; // move it back to just touching right wall
monsterBumpWallSound.play(); // play an appropriate sound
}
break;

// to do - fill in appropriate code for other directions
}
// increment the monster animation counter
monsterAnimationCount++;
if (monsterAnimationCount >= 10) // when the counter gets to 10, set it back to 0
monsterAnimationCount = 0;

// update each munchie animation
for (int i = 0; i < NUM_MUNCHIES; i++)
{
// increment the animation counter
munchieAnimationCount[i]++;
if (munchieAnimationCount[i] >= 10) // when the counter gets to 10, set it back to 0
munchieAnimationCount[i] = 0;
}

edit

it now rotates the way i am facing via this code

switch (monsterDirection)
{
case Input.LEFT: case Input.NONE:
// this is the angle of the roof of his mouth
// when his mouth is fully open
startAngle = 205;
break;
// to do: fill in animation code for other directions
}

i just need to know how something dissappears when you touch it

[tim]

Hello jaferris.

Collision detection can get tricky. First you must ask yourself:

1. Are my objects moving fast?
2. Are my objects complicated in shape?

If your answer is "no" to both these questions then you can simply create a box around your objects and test on a regular basis if the are intersecting. If this is false then collision detection can involve line intersection, distances and creating a "cage" around the object to handle the velocity of the object.

I have collision detection code if you need it, but it is complicated and it can slow down your game if used improperly. The best advise that I can give you is to draw pictures of your objects and solve this problem logically and mathematically.

[hardwired]

how something dissappears when you touch it
Don't draw it anymore.