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plzzzz i need your help i am making a lunarlander game and i am trying to get my lander to move with the propper physics, gravity, momentum, etc... i have ask my aunts brother to help me this forth of july weekend and he gave me all the equations i need for the game. but i forgot how and where to put them in and what some mean. plzzzz help!

itallics = superscripts / subscripts. superscripts after cosine and sine. subscripts after variables. subscript o means old. so xo = old x value. t = time. y = y positiion on screen. x = x position on the screen. a = acceleration. theta means theta. v = volocity.

These are the equations:
1) ay = f/m * sine 60O - g
2) ax = f/m * cosine 60o
3) y = 1/2 (f/m * sine 60o - g) * t2 +voy * t +yO
4) x = 1/2 (f/m * cosine 60o) * t2 +vox * t +xO
5) vx = ay * t + vox
6) vy = ax * t + voy
7) 1/2 g * t2 + vo * t + 1/2fy/m * t2
8)x = vox * t + 1/2 * fx/m * t2

Read a physic book or learn the terminology then it'll all make sense.

For a 2d game you do not need to make real physic's you can make it seem like real with a few simple lines of code for a 3d game it'd have to be all that math physic's stuff that you'd have to read up on to learn.

What these simple lines of code are i dunno for 2d if you want to bump into things its easy you can use a 3d circle square whatever and just use collision commands its not perfect but it'll work for friction and other things you'd just use the ANG value along with a few other things. Its easyer to immatate physic in 2d then 3d to me.

could you please tell us what each equation is trying to find

i assume 1 and 2 are finding the acceleration, 3 and 4 are finding the x/y position, 5 and 6 are finding the velocity

and do you need help implementing? try making some code first then ask when you get stuck

also look up basic physics on google and you'll see these equations explained

Let me first say its a lot harder than it looks to make a game like this.I made a simple Lunar Lander game when I was starting out; which I unfortunately lost the code to; and it was quite a challenge. I think those equations are going a little too complex for what you need. All you need are the standard equations of motion and a simple force equation.

Equations of motion:



Force equation:



Also if a body is falling the loss of gravitational potentential energy is equal to the gain in kinetic energy therefore:



List of what the letters represent:



To start youy game you should make a sprite with its offset set as its centre. By doing this its rotation will be at its center. Also you need to retrieve the angle of the sprite after the player's movement. After this you need to set up all the forces to act on the player then add all the forces togeher. To do this you need to split each force into its horizontal and verticle components and add the horizontal parts together and the vertical components together. To get a horizontal or verticle component of a force you need to use sin and cos.

You should now have two forces a horizontal force and a verticle force. You need to then turn the forces into distances to add to the players ship, which is done by using the equations of motion linked in with the force equations. Then all you have to do is update the player's ship and your done.

thanks guys you all helped alot my game is comeing along now thanks to you.