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GDI Help

Started by Icemage Jan 6, 2001 at 3:46 PM 4 replies 600+ views

Original Post

Jan 6, 2001 at 3:46 PM

I''m Making a pong game and i cant figure out how to make the ball reverse its velocity when it hits the paddle im using GDI and here''s what i have been trying... ///////////////////////////////////////////////////////////////// if (ball_y > PADDLE_HEIGHT && ball_y < WINDOW_HEIGHT && ball_y == paddle_y && ball_x == paddle_x) { ball_xv = -ball_vx; } ///////////////////////////////////////////////////////////////// Ok i know i need to explain some of my variables... ball_y = the ball y axis ball_x = take a wild guess paddle_y = the height of the paddle (its on the bottom of the screen) paddle_x = the axis the paddle moves on ball_xv= the velocity of the ball going on the x axis ball_yv= the velocity of the ball going on the y axis Does anyone know how to help me??? IceMage

SHilbert

122

SHilbert

Jan 6, 2001 at 4:03 PM

Umm... could you give us a description of where things are on the screen? It doesn''t make sense to be flipping the x velocity of the ball if it hits a paddle on the bottom of the screen.

DarkMage139

Jan 6, 2001 at 4:23 PM

GDI? Use DDraw.

- DarkMage139 (Neokatana Software)
"I can smell the sea." - Majiir Paktu, Homeworld

Icemage

Author

Icemage

Jan 6, 2001 at 4:35 PM

opps i meant to put...

if (ball_y > PADDLE_HEIGHT && ball_y < WINDOW_HEIGHT &&
ball_y == paddle_y && ball_x == paddle_x)
{
ball_yv = -ball_yx;
{

Dark im learning to inprove all my skills not just dx

SHilbert

122

SHilbert

Jan 6, 2001 at 6:08 PM

That code looks like it will work only if the ball is in the exact center of the paddle. Try checking if the ball is within a range, rather than if it''s just on one pixel.

Icemage

Author

Icemage

Jan 7, 2001 at 10:09 PM

Now how would i put a range on it?

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