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GML for C++, C++ Implementations of GML Functions

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OniLink10

Posted: Jun 24 2009, 03:11 PM

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GML.cpp:

CODE

#include <cmath>

const double pi = 3.14159265358979; // Pi to the max accuracy of double

double abs(double x)
{
return fabs(x); // Just a Wrapper
}

double sign(double x)
{
return -(x<0) + (x>0); // Xgoff is the best Poster
}

double round(double x)
{
if (x-floor(x) < 0.5) // If Rounding down
return (x%1); // Round Down
else // Otherwise
return ((x%1)+1); // Round Up
}

double point_distance(double x1, double y1, double x2, double y2)
{
return (sqrt(((x2-x1)*(x2-x1))+((y2-y1)*(y2-y1)))); // Pythagorean Theorem FTW
}

double point_direction(double x1, double y1, double x2, double y2)
{
double degrees = (atan2(y2-y1, x2-x1)*180/pi); // Get the Angle in Radians from atan2 and convert it to Degrees.
return (degrees < 0 ? 360+degrees : degrees); // Just correcting atan2
}

double lengthdir_x(double length, double dir)
{
return cos(dir*pi/180)*length; // Thanks RetroXYZ!
}

double lengthdir_y(double length, double dir)
{
return -sin(dir*pi/180)*length; // Thanks RetroXYZ!
}

Update History:
6/24/2009: Released with point_direction
6/26/2009: Added abs(x), sign(x), round(x), and point_distance(x1, y1, x2, y2)
6/27/2009: Fixed a really STUPID mistake is round(x), added lengthdir_x and lengthdir_y thanks to RetroXYZ, and edited sign(x) to use a very clever technique by Xgoff.

This post has been edited by OniLink10 on Jun 27 2009, 10:44 PM

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!

Xgoff

Posted: Jun 24 2009, 04:00 PM

<):|

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i like this more :(

QUOTE

const double PI = 3.14159265358979;
const double RAD_TO_DEG = 180 / PI;

double direction_to_point(double x1, double y1, double x2, double y2)
{
double result = atan2(y2 - y1, x2 - x1) * RAD_TO_DEG;
return result < 0 ? 360 + result : result;
}

--------------------

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QUOTE

(5:25:58 PM) Mikau: xgoff
(5:26:00 PM) Mikau: guess what
(5:26:04 PM) Xgoff: chicken butt
(5:26:09 PM) Mikau: **** you

OniLink10

Posted: Jun 24 2009, 05:26 PM

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QUOTE (Xgoff @ Jun 24 2009, 02:00 PM)

i like this more

That would work. It's just a different way of writing it.

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!

DJ Yoshiman

Posted: Jun 24 2009, 09:07 PM

My post is to the right.
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QUOTE (OniLink10 @ Jun 24 2009, 03:26 PM)

That would work. It's just a different way of writing it.

i like Xgoff's better

it's shorter and won't take up as much room

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Kyori

Posted: Jun 24 2009, 09:09 PM

I'm a GUY >.<
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QUOTE (OniLink10 @ Jun 24 2009, 10:26 PM)

That would work. It's just a different way of writing it.

Less variables in xgoff's.

--------------------

OniLink10

Posted: Jun 25 2009, 09:40 PM

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Took xgoff's and renamed the variable, removed the RADTODEG, and added Parenthesis in case your Compiler is retarded and doesn't know Order of Operations.

This post has been edited by OniLink10 on Jun 25 2009, 09:40 PM

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!

Guinea	Posted: Jun 26 2009, 05:44 AM
6 Group: Admins Posts: 8600 Member No.: 893 Joined: 15-March 05 Status: (0d)	May I ask why you posted this? It's just one function, and that isn't really rocket science either. Unless you're planning to expand on that and create a DLL with such.

RetroXYZ	Posted: Jun 26 2009, 09:39 AM
Standard Member Group: Members Posts: 2714 Member No.: 4325 Joined: 27-August 07 Status: (0d)	I'm half tempted to see if you copied that function from ENIGMA and posted it here. Anyways, why does this deserve a topic? No offense, but a majority of MFGG doesn't know C++, and the minority that does already knows how to do this.

OniLink10

Posted: Jun 26 2009, 02:47 PM

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QUOTE (Guinea @ Jun 26 2009, 03:44 AM)

May I ask why you posted this?
It's just one function, and that isn't really rocket science either.

Unless you're planning to expand on that and create a DLL with such.

I'm planning on expanding with more functions, and probably going to turn it into a gml.cpp type of file that people can add to their projects so they can use GML functionality(Not a GML Compiler like ENIGMA).

@RetroX: No, I did not copy anything from ENIGMA.

This post has been edited by OniLink10 on Jun 26 2009, 03:00 PM

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!

SuperMarioMaster

Posted: Jun 26 2009, 03:16 PM

It's been real
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QUOTE (OniLink10 @ Jun 26 2009, 03:47 PM)

I would like that :]

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Guinea	Posted: Jun 27 2009, 01:08 PM
6 Group: Admins Posts: 8600 Member No.: 893 Joined: 15-March 05 Status: (0d)	Why do you return "x-floor(x)" in the "round()" function? Wouldn't just "floor(x)" be what you'd get?

MrGuy

Posted: Jun 27 2009, 02:31 PM

NO WAY also im gay
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QUOTE (Guinea @ Jun 27 2009, 01:08 PM)

Why do you return "x-floor(x)" in the "round()" function?
Wouldn't just "floor(x)" be what you'd get?

Yeah, I'm not understanding that logic either; x-floor(x) would return the decimal places of x.

Also, (x-floor(x)) can be replaced with (x % 1) anyway.

This post has been edited by MrGuy on Jun 27 2009, 02:31 PM

OniLink10

Posted: Jun 27 2009, 08:56 PM

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Oh whoops, I was tired when I did that. Fixing...

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!

Xgoff

Posted: Jun 27 2009, 09:53 PM

<):|

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being an asshole again

QUOTE

double sign(double val)
{
return -(val < 0) + (val > 0);
}

i bet someone can find an instance where that'll break horribly

This post has been edited by Xgoff on Jun 27 2009, 09:54 PM

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QUOTE

(5:25:58 PM) Mikau: xgoff
(5:26:00 PM) Mikau: guess what
(5:26:04 PM) Xgoff: chicken butt
(5:26:09 PM) Mikau: **** you

Retriever II

Posted: Jun 27 2009, 09:57 PM

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QUOTE (Xgoff @ Jun 27 2009, 10:53 PM)

being an asshole again

i bet someone can find an instance where that'll break horribly

Well it's clever.

--------------------

Xgoff

Posted: Jun 27 2009, 10:01 PM

<):|

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QUOTE (Retriever II @ Jun 27 2009, 08:57 PM)

Well it's clever.

not as clever as me trying to shift out the sign bit

didn't want to work :(

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QUOTE

(5:25:58 PM) Mikau: xgoff
(5:26:00 PM) Mikau: guess what
(5:26:04 PM) Xgoff: chicken butt
(5:26:09 PM) Mikau: **** you

RetroXYZ

Posted: Jun 27 2009, 10:02 PM

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P.S.: If someone gets to the point where they know C++ but don't know these simple math functions then I don't know what to say.

Also, here's something slightly more useful (although someone who knows C++ should still know how to do this, also uses the DEG_TO_RAD and pi variables from the first post):

CODE

double lengthdir_x(double length,double dir)
{
return cos(dir*DEG_TO_RAD)*length;
}

double lengthdir_y(double length,double dir)
{
return -sin(dir*DEG_TO_RAD)*length;
}

This post has been edited by RetroXYZ on Jun 27 2009, 10:16 PM

OniLink10

Posted: Jun 27 2009, 10:42 PM

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QUOTE (RetroXYZ @ Jun 27 2009, 08:02 PM)

CODE

double lengthdir_x(double length,double dir)
{
return cos(dir*DEG_TO_RAD)*length;
}

double lengthdir_y(double length,double dir)
{
return -sin(dir*DEG_TO_RAD)*length;
}

Nice job. Keep in mind that just because someone can program in C++, doesn't mean that they are good at math.

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QUOTE (Xgoff @ Sep 10 2009 @ 06:11 PM)

did you try hello's engine

make sure to not ****ing change anything before using it!