Separate renderer into own folder

client/renderer/math.ts

@@ -0,0 +1,24 @@
+export function perspective(out: Float32Array, fov: number, aspect: number, near: number, far: number) {
+	const f = 1 / Math.tan(fov / 2);
+	const nf = 1 / (near - far);
+
+	out[0] = f / aspect;
+	out[1] = 0;
+	out[2] = 0;
+	out[3] = 0;
+
+	out[4] = 0;
+	out[5] = f;
+	out[6] = 0;
+	out[7] = 0;
+
+	out[8] = 0;
+	out[9] = 0;
+	out[10] = (far + near) * nf;
+	out[11] = -1;
+
+	out[12] = 0;
+	out[13] = 0;
+	out[14] = (2 * far * near) * nf;
+	out[15] = 0;
+}