What do you need help with? Version 5

[CmdrMatthew]

[QUOTE=luavirusfree;39124394]Easier to help with: Is physcollide data.HitNormal.z on a scale of 90? Such as this:
1.0=-90, 0.5=-45, 0=0, -0.5=45, -1.0=90
or
1 = Straight Up, 0 = Level to gravity, -1 = straight down.
Or is it reversed. since -90° is UP, and +90° is DOWN in Source? Thus, -1 is up, and +1 is down... 0 is still level to gravity.[/QUOTE]The surface normal doesn't linearly represent the angle of the hit. The z element of a normal would be 1 if it is facing directly up, and -1 if facing directly down. Anything else requires the use of the x and y elements and trigonometry to determine the actual hit angle.
Imagine a normal vector as an arrow pointing from (0,0,0) to its value if that helps.

Could you tell me what the HitNormal is describing exactly so I can help you further? Is it the normal of the surface it hit, or is it something else?

[Topgamer7]

[QUOTE=Staneh;39124783]I have a question, does Box2D support circle-collision? I've only seen people make boxes with it, and that's about it.[/QUOTE]

So you've never played angry birds? Because it's in box2d.

[Staneh]

[QUOTE=Topgamer7;39124817]So you've never played angry birds? Because it's in box2d.[/QUOTE]

Wow, didn't know that. Thanks.

[Johnny on Flame]

Anyone here ever had any troubles with SDL_mixer crashing during midi music changes related to altering the song's channel volume? I've been getting segv'd by that for quite a while now, fun fact is, it doesn't happen when I play .ogg or .wav
Another question, what free, GPL library can I use to play midi files?

[Armandur]

I'm trying to convert a formula I found for getting the bearing between two gps coordinates, from javascript to java (That in itself is no problem). There's a variable in the formula that I don't know where it originates from, any help?

The formula is from [URL="http://www.movable-type.co.uk/scripts/latlong.html"]here[/URL]

[cpp]
var y = Math.sin(dLon) * Math.cos(lat2);
var x = Math.cos(lat1)*Math.sin(lat2) -
Math.sin(lat1)*Math.cos(lat2)*Math.cos(dLon);
var brng = Math.atan2(y, x).toDeg();
[/cpp]

[Z_guy]

[QUOTE=Staneh;39124783]I have a question, does Box2D support circle-collision? I've only seen people make boxes with it, and that's about it.[/QUOTE]

Yes
[img]https://dl.dropbox.com/u/19560951/Water/2012-12-19_013212.png[/img]

[ThePuska]

[QUOTE=Armandur;39129133]I'm trying to convert a formula I found for getting the bearing between two gps coordinates, from javascript to java (That in itself is no problem). There's a variable in the formula that I don't know where it originates from, any help?

The formula is from [URL="http://www.movable-type.co.uk/scripts/latlong.html"]here[/URL]

[cpp]
var y = Math.sin(dLon) * Math.cos(lat2);
var x = Math.cos(lat1)*Math.sin(lat2) -
Math.sin(lat1)*Math.cos(lat2)*Math.cos(dLon);
var brng = Math.atan2(y, x).toDeg();
[/cpp][/QUOTE]

What variable?

lat2 is latitude of the second point
lat1 is latitude of the first point
dLon is delta longitude, or lon2-lon1

[Armandur]

[QUOTE=ThePuska;39129219]What variable?

lat2 is latitude of the second point
lat1 is latitude of the first point
dLon is delta longitude, or lon2-lon1[/QUOTE]

Sorry, yeah dlon was what I was missing, thanks :)

[HeatPipe]

-nevermind, found solution-

[Sartek]

Any idea why I am getting these errors?

8|error: expected unqualified-id before ')' token|
9|error: expected class-name before '(' token|
6|error: an anonymous struct cannot have function members|
24|error: abstract declarator '<anonymous class>' used as declaration|

#ifndef MouseWrapper
#define MouseWrapper

#include <SFML/Window/Mouse.hpp>

class MouseWrapper
{
public:
    MouseWrapper();
    ~MouseWrapper();
    int X();
    int Y();
    bool left();
    bool lastleft();
    bool right();
    bool lastright();
    void Update();
private:
    int x;
    int y;
    bool LEFT;
    bool LLEFT;
    bool RIGHT;
    bool LRIGHT;
};
#endif // MouseWrapper

SOLVED
#define was not in all caps.

[luavirusfree]

[QUOTE=CmdrMatthew;39124794]The surface normal doesn't linearly represent the angle of the hit. The z element of a normal would be 1 if it is facing directly up, and -1 if facing directly down. Anything else requires the use of the x and y elements and trigonometry to determine the actual hit angle.
Imagine a normal vector as an arrow pointing from (0,0,0) to its value if that helps.

Could you tell me what the HitNormal is describing exactly so I can help you further? Is it the normal of the surface it hit, or is it something else?[/QUOTE]

The Normal of a surface that Mario's Fireballs may bounce off of. If the normal is 1, or -1, it will destroy the ball.

[editline]7th January 2013[/editline]

Uhm, how do I turn a hit normal into an angle?
Sorry if this double-posts.

[sambooo]

[QUOTE=CmdrMatthew;39124794]The surface normal doesn't linearly represent the angle of the hit. The z element of a normal would be 1 if it is facing directly up, and -1 if facing directly down. Anything else requires the use of the x and y elements and trigonometry to determine the actual hit angle.
Imagine a normal vector as an arrow pointing from (0,0,0) to its value if that helps.

Could you tell me what the HitNormal is describing exactly so I can help you further? Is it the normal of the surface it hit, or is it something else?[/QUOTE]

You can find the angle of incidence given the normal of the surface and the direction vector of the projectile by using:

theta = arccos(a.b/|a||b|) where a and b are the normal and direction.

[Arnold]

Been considering transitioning to C++ from Java for a while, now I've decided. What's the best free IDE for C++ ?

[luavirusfree]

This is dumb (on my part), but I seem to get next to no help at all on this thread.

[ThePuska]

Maybe it's because people don't understand you and you don't understand the answers that were given to you.

[ArgvCompany]

[QUOTE=luavirusfree;39132787]The Normal of a surface that Mario's Fireballs may bounce off of. If the normal is 1, or -1, it will destroy the ball.

[editline]7th January 2013[/editline]

Uhm, how do I turn a hit normal into an angle?
Sorry if this double-posts.[/QUOTE]

Are you talking about a two-dimensional normal vector? Then you can use [URL=http://en.wikipedia.org/wiki/Atan2]atan2[/URL].

[Johnny on Flame]

[QUOTE=farmatyr;39133494]Been considering transitioning to C++ from Java for a while, now I've decided. What's the best free IDE for C++ ?[/QUOTE]

Eclipse or Notepad++ (Kate in case you're a linux user.)

[esalaka]

[QUOTE=JohnnyOnFlame;39133957]Eclipse or Notepad++ (Kate in case you're a linux user.)[/QUOTE]

NP++ isn't an IDE tho.

(Also there's Geany too if you're not a KDE person)

[luavirusfree]

3 Dimensions. (Mario Fireballs)
I don't want to do it 2D, since I will have at least one 3D level, where you aren't side-scrolling.
I get more help here than in the Lua Help Thread... I understand what everyone is saying, though.

[Eudoxia]

I fucking love Kate. Just throwing that out there.

[WTF Nuke]

I'm trying to make a multiplayer game for a school project, but I can't seem to communicate between PCs. I understand if it's because ports are blocked, however halo ce is playable, and using their ports I am still unable to send packets. I'm using java, and the comps are on the same LAN. Any ideas?

[sambooo]

[QUOTE=luavirusfree;39134152]3 Dimensions. (Mario Fireballs)
I don't want to do it 2D, since I will have at least one 3D level, where you aren't side-scrolling.
I get more help here than in the Lua Help Thread... I understand what everyone is saying, though.[/QUOTE]

If you scroll up you'll find I did tell you how to find the angle you're after

[luavirusfree]

I don't recall the meaning of theta... lol. Is that a variable in a trigonometric function?

[DarkCybo7]

Theta is the angle.

[luavirusfree]

Mkays, t-thank-thou.!

Uhm, how would I write that? "theta = arccos(a.b/|a||b|) where a and b are the normal and direction."
colang=arccos(normal.dir/|normal||dir|
??? ???

[Meatpuppet]

[QUOTE=luavirusfree;39134740]I don't recall the meaning of theta... lol. Is that a variable in a trigonometric function?[/QUOTE]

You're going to have a hard time programming anything relating to transformations in a 2D/3D space if you don't know your trig. I'd suggest you brush up on it.

[luavirusfree]

I learned basic trig... and trig for physics. I remember some, but I never learned theta, only "Angle=Cos of X" ... .

[cody8295]

I need some help with PyGame. I'm trying to get the surface object to move when I drag it with my mouse. I've already tried using mouse.get_pos() and mouse.get_rel() with surface.scroll(), but I can't seem to figure it out. Any help is appreciated.

[Lord Fear]

[QUOTE=WTF Nuke;39134492]I'm trying to make a multiplayer game for a school project, but I can't seem to communicate between PCs. I understand if it's because ports are blocked, however halo ce is playable, and using their ports I am still unable to send packets. I'm using java, and the comps are on the same LAN. Any ideas?[/QUOTE]

Ports shouldn't really be blocked within the LAN unless manually done. Are you using TCP or UDP?

[Spero78]

So ive been programming a TCP server in PHP but i've been looking to redo it in another language, i was looking at node / ruby, what would you people suggest? I couldn't find any good guides for setting up ruby on osx for application development, there are plenty for rails but i don't want that. Node seems pretty good but id rather not use javascript. Any suggestions are welcome