360 degrees shooting, how to.
Author
Hello this is my first post here. Greetings to the whole community!
I'm trying to shoot a laser ray from a certain x,y location to any direction. The mouse should tell the direction the ray should follow (its the aim), the ray should have a certain size and speed (only one ray can travel at the time).
I'm using C# and GDI+ to complish this, I really never used Vectors in motion, this will be the first time so I'm totally lost on how to do all this. I can't even get started because can't find nothing on the web to fit my needs or skills...
Thanks in advance for any possible help.
Fernando Pereira
Author
Well I see around 60 views but no answers. If my post was confused or non-understandable, please, do let me know about it. I will glad reformulate it.
Thanks
[Edited by - EFileTahi-A on November 29, 2007 10:02:45 AM]
Thanks
[Edited by - EFileTahi-A on November 29, 2007 10:02:45 AM]
Short answer (pseudocode):
// To create the laser:Laser laser;laser.position.set(x,y); // (x,y) is where the laser startslaser.direction = normalize(mouse.position - laser.position);// To move the laser (speed is the speed of the laser in units per second,// and deltaTime is the number of seconds since the last update):laser.position += laser.direction * speed * deltaTime;// To render the laser (how to do this is up to you - here I'm rendering// backwards from the end of the laser, in which case you'd probably want// to start the laser a little bit 'forward' from the initial (x,y)// position):render_line_segment( laser.position, laser.position - laser.direction * laser.length);
Author
Thanks for the post jyk! :)
Are you familiarized with c#?
In order to get the traveling direction I will need to acquire the mouse's x,y location and the x,y of the shot's departure location right?. So is the following correct?:
int iMouseX = Mouse.X;
int iMouseY = Mouse.Y;
int iSourceX = 400;
int iSourceY = 300;
int iDirectionX = iMouseX - iSourceX;
int iDirectionY = iMouseY - iSourceY;
Anyways, I will try to recreate my function once I get home based on what you described.
PS: You know where can I read more about this topic?
Thanks again!
Are you familiarized with c#?
In order to get the traveling direction I will need to acquire the mouse's x,y location and the x,y of the shot's departure location right?. So is the following correct?:
int iMouseX = Mouse.X;
int iMouseY = Mouse.Y;
int iSourceX = 400;
int iSourceY = 300;
int iDirectionX = iMouseX - iSourceX;
int iDirectionY = iMouseY - iSourceY;
Anyways, I will try to recreate my function once I get home based on what you described.
PS: You know where can I read more about this topic?
Thanks again!
You could try <a href="http://chortle.ccsu.edu/VectorLessons/vectorIndex.html>this link or just search for "vector math" in google, you'll find plenty of tutorials for it.
Author
Well, I think I will need a tutorial to do this... Or a full working example (that would be awesome).
Does anyone know about any website capable of describing what I intend to do?
Thank you.
Does anyone know about any website capable of describing what I intend to do?
Thank you.
SiS-Shadowman did, but the cat got his tongue [rolleyes].
Quote:Original post by SiS-Shadowman
You could try this link or just search for "vector math" in google, you'll find plenty of tutorials for it.
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