Alternatively, he gets too many emails from people asking for his code, so he just deletes them upon sight. Or maybe not.
Just got back on the internet after losing my access for a week. Read more on Random Discussion.
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Slope Detection
(160 posts) (31 voices)-
Just got back on the internet after losing my access for a week. Read more on Random Discussion.Posted 3 years ago # -
I emailed him twice, and he didn't reply... In the second I just asked what math function he used for slope detection... does anyone know the math function he uses for slope detection?
pi=3.141592653589793238462643383279502884197169399375195820974944592307816406Posted 3 years ago # -
What do you mean by "math function"? Please elaborate (I don't know AS but I may be able to help in a general coding-sense).
Posted 3 years ago # -
@Komputer: If the only thing that is holding you back is your slope detector, then find a way to scrap it from your game. Simple enough..
Posted 3 years ago # -
atan2() is the function used to find the angle between two points, but it doesn't work for slopes over 90 degrees. I'm pretty sure Brad just uses cos() and sin().
Posted 3 years ago # -
actually, before you try to do ANY of that, you have to get it so slowdown on the slopes, you really don't need to use atan2, cos, or even sin... just normal atan works just fine, you've just got to do a separate if statement code for the angles 90 degrees or higher, for both the guy itself, and the ground.
The only reason I don't have a Nobel Prize is because I'm too much of a genius for the common mind to grasp.Posted 3 years ago # -
I thought I posted this a while ago already, but anyway...
How to do 360° angle check.It troubled me for a long while as well, but I found out Flash has some problem with negative angles. So you have to keep the actual angle (upper textox) always positive (absolute value) and use a multiplier (lower textbox) to make the actual value negative when needed.
Of course, this isn't slope detection yet, I'll leave it to you guys to implement this into your platformer.
Not in cruelty
Not in wrath
the Reaper came today.An Angel visited
this gray path
And took the cube away.Posted 3 years ago # -
If tan doesn't work, you can use sin and cos. If you know what the x,y difference is you can find the hypotenuse of the right-angled triangle.
If you understand that.
Posted 3 years ago # -
atan2 works, you just need to use the multiplier.
Not in cruelty
Not in wrath
the Reaper came today.An Angel visited
this gray path
And took the cube away.Posted 3 years ago # -
Yea ok, or that.
Posted 3 years ago # -
What I'm dOing right now is getting the slope of the two lines, then using tangent and multipling the number to turn radians to degrees. The only place I use cosine and sine is to move the two dots that get the slope of the line.
Var dy = p1.y-p2.y
var dx=p1.x-p2.x
var slope=dy/dx
var ata= Math.atan(slope)
char.rotation=ata*180/math.piwhere's my mistake?
pi=3.141592653589793238462643383279502884197169399375195820974944592307816406Posted 3 years ago # -
thats all right, but you have to use some of that for your moving left and right code, not just "if(Key.isDown(Key.RIGHT)){this._x++;}" you're going to have to use you slope to determine how much of a y change you get, and ho much an x change you get. i've got some stuff working with this, but haven't had the time to get the whole 306 degree rotation stuff, although i probably could if i put some time into it, but as most of you know... parallels... twisted... lots of projects..... not time for useless code i'll never use....
The only reason I don't have a Nobel Prize is because I'm too much of a genius for the common mind to grasp.Posted 3 years ago # -
Well your problem is that the inverse of tangent only gives you an answer in quadrants 1 and 4 (-90 to 90 degrees). The reason for this is because otherwise it wouldn't be a function--you'll learn about this in trig. So because of this you could do as nyubis shows in his example and use a multiplier for atan/atan2 so you can get all angles.
[EDIT]The inverse of tangent is atan and atan2 btw
Posted 3 years ago # -
Implement it into a SMW hack
Not in cruelty
Not in wrath
the Reaper came today.An Angel visited
this gray path
And took the cube away.Posted 3 years ago #
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