The Next Generation of 2D Roleplaying Games
http://elysianshadows.com/phpBB3/
http://en.wikipedia.org/wiki/Kinematicsxx6heartless6xx wrote:I want to make a Pong game, but I have no idea how to make the gravity in the game that pulls the ball towards the floor and sends it flying in different directions when it is hit.
Can you guys point me to a good site or can you guys just start me off and I'll take it from there.
How can I apply these equations into a program?davidthefat wrote:http://en.wikipedia.org/wiki/Kinematicsxx6heartless6xx wrote:I want to make a Pong game, but I have no idea how to make the gravity in the game that pulls the ball towards the floor and sends it flying in different directions when it is hit.
Can you guys point me to a good site or can you guys just start me off and I'll take it from there.
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//Update position
ball.position.x = ball.position.x + ball.velocity.x;
ball.position.y = ball.position.y + ball.velocity.y;
Actually, it also changes the y velocity. It goes bouncing off at an angle that's determined by where on the paddle it hits. What you might want to do is make the ball move along the vector from the center of the paddle to the center of the ball. It should be a fairly realistic representation, while still being very easy to make.dandymcgee wrote:if it hits a paddle reverse the x velocity.
Making the ball go in a reverse direction makes some sense. How would I make the ball move along a vector? You say its still very easy to make but can you explain some more?Ginto8 wrote:Actually, it also changes the y velocity. It goes bouncing off at an angle that's determined by where on the paddle it hits. What you might want to do is make the ball move along the vector from the center of the paddle to the center of the ball. It should be a fairly realistic representation, while still being very easy to make.dandymcgee wrote:if it hits a paddle reverse the x velocity.
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xvel = ball.x - paddle.x;
yvel = ball.y - paddle.yCode: Select all
float mag = sqrt(xvel*xvel+yvel*yvel); // get the vector's magnitude
// next two lines normalize the vector (give it a length of 1)
xvel /= mag;
yvel /= mag;
// Now, scale the vector to the "speed" you want
xvel *= speed;
yvel *= speed;Thanks man, I'll definitely try this out.Ginto8 wrote:well, if you have the (x,y) coordinates of the ball's center, and the (x,y) coordinates of the paddle's center, thenif you want to increase the speed, follow this algorithm:Code: Select all
xvel = ball.x - paddle.x; yvel = ball.y - paddle.yCode: Select all
float mag = sqrt(xvel*xvel+yvel*yvel); // get the vector's magnitude // next two lines normalize the vector (give it a length of 1) xvel /= mag; yvel /= mag; // Now, scale the vector to the "speed" you want xvel *= speed; yvel *= speed;
Oh right, pong doesn't use real physics. :PGinto8 wrote:Actually, it also changes the y velocity. It goes bouncing off at an angle that's determined by where on the paddle it hits. What you might want to do is make the ball move along the vector from the center of the paddle to the center of the ball. It should be a fairly realistic representation, while still being very easy to make.dandymcgee wrote:if it hits a paddle reverse the x velocity.