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var Face4 = Vector3.extend ({ a: null, b: null, c: null, d: null, normal: null, screen: null, color: null, init: function(a, b, c, d, uv, normal, color) { this._super((a.x + b.x + c.x + d.x) / 4, (a.y + b.y + c.y + d.y) / 4, (a.z + b.z + c.z + d.z) / 4); this.a = a; this.b = b; this.c = c; this.d = d; this.screen = new Vector3();
this.color = color ? color : new Color();
}, toString: function() {
return 'Face4 ( ' + this.a + ', ' + this.b + ', ' + this.c + ', ' + this.d + ' )';
} });