is mouse over triangle[help]

[cs8898]

hy, all

i want to check if, the mouse is over an triangle,

but to create 100lines of code is a very bad scripting style,

is there any, other chance to find out that the mouse is over the triangle

Sorry for my worse English

[iPrestege]

What do you mean? Above the triangle? Explain more .

[cs8898]

i wanna to write a radial Menu, so i would draw a circle with dxDrawLine();

then i want to create some peaces,

like that

but i hade to check that the mouse iv over or isnt over a section of the circle

[Alen141]

Why don't you make it on click it makes it easier

[cs8898]

i will make it with the standard GUI functions, and with them i could use Rectangle, that woud be easyer

[cs8898]

I found something but i cant get it, my for some others

http://www.blackpawn.com/texts/pointinpoly/default.html

[50p]

You can try this (I haven't tested it):

function isPointInTriangle( x,y, x1,y1, x2,y2, x3,y3 )  
    if sign( x,y, x1,y1, x2,y2 ) < 0 or 
        sign( x,y, x2,y2, x3,y3 ) < 0 or 
        sign( x,y, x3,y3, x1,y1 ) < 0 
    then 
        return false; 
    end 
    return true; 
end 
  
function sign( x1,y1, x2,y2, x3,y3) 
    return (x1 - x3) * (y2 - y3) - (x2 - x3) * (y1 - y3); 
end