40     this.p2 = vec2.create();
48     vec2.set(q.p2, x + w, y);
60   Quad.From4Vecs = function(p1, p2, p3, p4) {  argument
63     vec2.set(q.p2, p2[0], p2[1]);
75     q.p2[0] = arr[2];
76     q.p2[1] = arr[3];
86       return vecInTriangle2(vec, this.p1, this.p2, this.p3) ||
91       var x0 = Math.min(this.p1[0], this.p2[0], this.p3[0], this.p4[0]);
92       var y0 = Math.min(this.p1[1], this.p2[1], this.p3[1], this.p4[1]);
94       var x1 = Math.max(this.p1[0], this.p2[0], this.p3[0], this.p4[0]);
95       var y1 = Math.max(this.p1[1], this.p2[1], this.p3[1], this.p4[1]);
103       vec2.copy(q.p2, this.p2);
117       vec2.copy(dstQuad.p2, this.p2, s);
128           bounds.width == this.p2[0] - this.p1[0] &&
129           bounds.y == this.p2[1] &&
131           bounds.height == this.p3[1] - this.p2[1] &&
133           bounds.height == this.p4[1] - this.p2[1]
150       vec2.sub(v12, this.p2, this.p1);
158       vec2.sub(v23, this.p3, this.p2);
183       vec2.add(dstQuad.p2, this.p2, tmpVec2a);
200           vec2.toString(this.p2) + ', ' +
206   function sign(p1, p2, p3) {  argument
207     return (p1[0] - p3[0]) * (p2[1] - p3[1]) -
208         (p2[0] - p3[0]) * (p1[1] - p3[1]);
211   function vecInTriangle2(pt, p1, p2, p3) {  argument
212     var b1 = sign(pt, p1, p2) < 0.0;
213     var b2 = sign(pt, p2, p3) < 0.0;