Made entire pipeline class based.

ts/display/Quad.ts

@@ -0,0 +1,11 @@
+import { Primitive } from "./Primitive";
+
+export class Quad extends Primitive {
+  constructor(z:number = 0,
+    x0:number = -1, y0:number = -1, u0:number = 0, v0:number = 0,
+    x1:number =  1, y1:number =  1, u1:number = 1, v1:number = 1
+  ) {
+    super();
+    quadInit(this._primitive, z, x0, y0, u0, v0, x1, y1, u1, v1);
+  }
+}