moving shape 1

Maybe you defined two coordinates to move the shape, i.e.
'x' and 'y'. And now we can define increment for each
directions by defining 'dx' and 'dy'.

Now we have,
int x=INITIAL_X, y=INITIAL_Y, dx=1, dy=0;

1. Assume INITIAL_X and INITIAL_Y are predefined constant.
I assumed dx=1 because you said the shape moves to right
direction initially.

2. Assume screen coordinates system, which means the
direction of y axis is down.

3. The pseudo code to move shape will be :
up button event : dx=0; dy=-1;
down button event : dx=0; dy=1;
right button event : dx=1; dy = 0;
left button event : dx=-1; dy=0;

4. Now you can write your timer code to move your shape.
x += dx;
y += dy;

5. You need to check the shape is in the visible area
to prevent it is disappeared from sight.

6. And it is possible to control the velocity of moving shape.
For example, if dx=2, the shape moves more faster than
dx=1.

It is also possible to move the shape diagonally.
Hee S. Chung
heesc@netian.com

Thanks alot greatkingrat that was very helpful.

Indo