src/pixi/utils/Polyk.js
function pointInTriangle(px, py, ax, ay, bx, by, cx, cy)
{
    var v0x = cx-ax;
    var v0y = cy-ay;
    var v1x = bx-ax;
    var v1y = by-ay;
    var v2x = px-ax;
    var v2y = py-ay;

    var dot00 = v0x*v0x+v0y*v0y;
    var dot01 = v0x*v1x+v0y*v1y;
    var dot02 = v0x*v2x+v0y*v2y;
    var dot11 = v1x*v1x+v1y*v1y;
    var dot12 = v1x*v2x+v1y*v2y;

    var invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
    var u = (dot11 * dot02 - dot01 * dot12) * invDenom;
    var v = (dot00 * dot12 - dot01 * dot02) * invDenom;

    // Check if point is in triangle
    return (u >= 0) && (v >= 0) && (u + v < 1);
}
function pointInTriangle(px, py, ax, ay, bx, by, cx, cy)
{
    var v0x = cx-ax;
    var v0y = cy-ay;
    var v1x = bx-ax;
    var v1y = by-ay;
    var v2x = px-ax;
    var v2y = py-ay;

    var dot00 = v0x*v0x+v0y*v0y;
    var dot01 = v0x*v1x+v0y*v1y;
    var dot02 = v0x*v2x+v0y*v2y;
    var dot11 = v1x*v1x+v1y*v1y;
    var dot12 = v1x*v2x+v1y*v2y;

    var invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
    var u = (dot11 * dot02 - dot01 * dot12) * invDenom;
    var v = (dot00 * dot12 - dot01 * dot02) * invDenom;

    // Check if point is in triangle
    return (u >= 0) && (v >= 0) && (u + v < 1);
}
function pointInTriangle ( px , py , ax , ay , bx , by , cx , cy ) { var v0x = cx - ax ; var v0y = cy - ay ; var v1x = bx - ax ; var v1y = by - ay ; var v2x = px - ax ; var v2y = py - ay ; var dot00 = v0x * v0x + v0y * v0y ; var dot01 = v0x * v1x + v0y * v1y ; var dot02 = v0x * v2x + v0y * v2y ; var dot11 = v1x * v1x + v1y * v1y ; var dot12 = v1x * v2x + v1y * v2y ; var invDenom = 1 / ( dot00 * dot11 - dot01 * dot01 ) ; var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom ; var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom ; // Check if point is in triangle return ( u >= 0 ) && ( v >= 0 ) && ( u + v < 1 ) ; }
Checks if a point is within a triangle

@private
Checks if a point is within a triangle