tsp

projects/tsp/canvas.js

@@ -0,0 +1,19 @@
+export function setupCanvas(gl, canvas) {
+  canvas.width = canvas.clientWidth * window.devicePixelRatio;
+  canvas.height = canvas.clientHeight * window.devicePixelRatio;
+  gl.viewport(0, 0, canvas.width, canvas.height);
+
+  return {
+    canvas,
+    gl,
+    aspectRatio: canvas.width / canvas.height
+  };
+}
+
+export function resizeCanvas(gl, canvas, program) {
+  canvas.width = canvas.clientWidth * window.devicePixelRatio;
+  canvas.height = canvas.clientHeight * window.devicePixelRatio;
+  gl.viewport(0, 0, canvas.width, canvas.height);
+  gl.useProgram(program);
+  gl.uniform2f(gl.getUniformLocation(program, "u_resolution"), canvas.width, canvas.height);
+}