add lisp

lisp/README.md

@@ -0,0 +1,13 @@
+# Lisp MMO Project Implementation
+
+The interesting thing about lisp is that for being the 2nd oldest language, it has some of the most flavors of any programming language.
+
+Lisp is much easier to implement from a compiler/interpreter point of view due to its structure, so it makes sense that it has so many implementations.
+
+[We are spoiled for choice for this challenge.](https://github.com/dundalek/awesome-lisp-languages)
+
+[lisp-µhttpd (game website & webserver) ](./www/README.md)
+
+[lisp-mmo-server (game backend) using picolisp](./server/README.md)
+
+[lisp-mmo-client (game frontend / UI) using common lisp](./client/README.md)

lisp/client/client.rkt

@@ -0,0 +1,50 @@
+#!/usr/bin/env racket
+#lang racket/base
+
+(module+ main
+  (require raylib/generated/unsafe)
+
+  (define (sync-camera camera camera_pos target_pos)
+      (set-Camera3D-target! camera target_pos)
+      (set-Vector3-x! camera_pos (Vector3-x target_pos))
+      (set-Vector3-y! camera_pos (+ (Vector3-y target_pos) 10.0))
+      (set-Vector3-z! camera_pos (+ (Vector3-z target_pos) 10.0))
+      (set-Camera3D-position! camera camera_pos))
+  
+  (define (move-user camera pos scale)
+      (when (IsKeyDown KEY_RIGHT)
+        (set-Vector3-x! pos (+ (Vector3-x (Camera3D-target camera)) scale)))
+      (when (IsKeyDown KEY_LEFT)
+        (set-Vector3-x! pos (- (Vector3-x (Camera3D-target camera)) scale)))
+      (when (IsKeyDown KEY_UP)
+        (set-Vector3-z! pos (- (Vector3-z (Camera3D-target camera)) scale)))
+      (when (IsKeyDown KEY_DOWN)
+        (set-Vector3-z! pos (+ (Vector3-z (Camera3D-target camera)) scale))))
+
+  (InitWindow 800 450 "racket lisp client : raylib")
+
+  (define camera_pos (make-Vector3 0.0 12.0 14.0))
+  (define target_pos (make-Vector3 0.0 2.0 0.0))
+
+  (define camera (make-Camera3D camera_pos target_pos (make-Vector3 0.0 1.0 0.0) 60.0 CAMERA_PERSPECTIVE))
+
+  (SetTargetFPS 60)
+  
+  (let loop ()
+    (when (not (WindowShouldClose))
+      (BeginDrawing)
+      (ClearBackground RAYWHITE)
+
+      (move-user camera target_pos 0.2)
+      (sync-camera camera camera_pos target_pos)
+
+      (BeginMode3D camera)
+
+      (DrawGrid 30 1.0)
+      (DrawCube (Camera3D-target camera) 0.5 0.5 0.5 PURPLE)
+
+      (EndMode3D)
+      (EndDrawing)
+      (loop)))
+
+  (CloseWindow))