Thanks a bunch!
Full Version: Slopes
I need help with the physics on this... OR... if you have a better way without using physics, that would be AWESOME.
Thanks a bunch!
Thanks a bunch!
QUOTE (gamma games @ Jun 29 2007, 08:58 PM)
I need help with the physics on this... OR... if you have a better way without using physics, that would be AWESOME.
Thanks a bunch!
Thanks a bunch!
I want to know to
I assume you already have the "move up a slope" code, you just want to know how to vary the speed with the steepness of the slope.
In that case, check the direction from the previous (x,y) to the current (x,y), and use that number in the speed calculation.
For example, try something like this:
Removing the comments will make it seem smaller
. And you can choose whatever base speed you want.
-IMP
*EDIT* As for "flying off" with the same speed and direction, just use this:
As for rotating, you can use image_angle, but since that's the same thing as the transform sprite D&D... You'll need to make the sprite face dead right in the first frame, choose Animations->Rotation->Counter-Clockwise with 36 frames, 360 degrees. Then, in the STEP event, set image_index=direction/10;
In that case, check the direction from the previous (x,y) to the current (x,y), and use that number in the speed calculation.
For example, try something like this:
CODE
/* Make sure you've moved before checking the direction. */
if (x!=xprevious or y!=yprevious) {
dir=point_direction(xprevious,yprevious,x,y);
}
/* Make sure the "dir" variable is never 0, just so we don't get a divide by 0 error. */
if (dir==0) { dir=1; }
/* Set the base speed, i.e. the speed whem moving straight from left to right. */
basespeed=5;
/* Calculate the speed based on the base speed and slope steepness. */
speed=2*basespeed/dir;
if (x!=xprevious or y!=yprevious) {
dir=point_direction(xprevious,yprevious,x,y);
}
/* Make sure the "dir" variable is never 0, just so we don't get a divide by 0 error. */
if (dir==0) { dir=1; }
/* Set the base speed, i.e. the speed whem moving straight from left to right. */
basespeed=5;
/* Calculate the speed based on the base speed and slope steepness. */
speed=2*basespeed/dir;
Removing the comments will make it seem smaller
. And you can choose whatever base speed you want.-IMP
*EDIT* As for "flying off" with the same speed and direction, just use this:
CODE
direction=point_direction(xprevious,yprevious,x,y);
speed=point_distance(xprevious,yprevious,x,y);
speed=point_distance(xprevious,yprevious,x,y);
As for rotating, you can use image_angle, but since that's the same thing as the transform sprite D&D... You'll need to make the sprite face dead right in the first frame, choose Animations->Rotation->Counter-Clockwise with 36 frames, 360 degrees. Then, in the STEP event, set image_index=direction/10;
wow, thanks. Ill tell you if i get any errors. Anyone else have any idea's?
Sorry,
I can't seem to get the coding right.. could u post up an example?
I can't seem to get the coding right.. could u post up an example?
I wrote that off the top of my head, so there may be problems with it that I overlooked.
Please post whatever problems you are having and I'll try to revise the code.
-IMP
Please post whatever problems you are having and I'll try to revise the code.
-IMP
gives me an error... cant read the dir==0 or dir=1..
thanks, it works
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