Added helloWorld

examples/helloWorld/helloWorld.lisp

@@ -0,0 +1,56 @@
+(ql:quickload :cl-chipmunk)
+(ql:quickload :rtg-math)
+(use-package :rtg-math)
+
+(defparameter cspace nil)
+(defparameter ground nil)
+
+(defparameter ball-body nil)
+(defparameter ball-shape nil)
+(defparameter moment-of-inertia nil)
+
+(defparameter dt 1/60)
+
+(setf cspace (chip:cp-space-new))
+(chip:cp-space-set-collision-slop cspace 2)
+(chip:cp-space-set-iterations cspace 5)
+
+(chip:cp-space-set-gravity cspace (v! 0 -100))
+
+(setf ground
+      (chip::cp-segment-shape-new (chip:cp-space-get-static-body cspace) 
+				 (v! -20 5) 
+				 (v! 20 -5) 
+				 0))
+
+(chip:cp-shape-set-friction ground 1)
+(chip:cp-space-add-shape cspace ground)
+(setf moment-of-inertia 
+      (chip:cp-moment-for-circle 1 0 5))
+
+(setf ball-body 
+      (chip:cp-space-add-body cspace 
+			      (chip:cp-body-new 1 moment-of-inertia))) 
+
+(chip:cp-body-set-position ball-body (rtg-math:v! 0 10))
+
+
+(setf ball-shape 
+      (chip:cp-space-add-shape 
+       cspace
+       (chip:cp-circle-shape-new ball-body 5)))
+
+(chip:cp-shape-set-friction ball-shape 0.7)
+
+(loop for i from 0 to 2 by dt
+     do (progn 
+	  (format t "p=~A v=~A~%"
+		  (chip:cp-body-get-position ball-body)
+		  (chip:cp-body-get-velocity ball-body))
+	  (chip:cp-space-step cspace dt)))
+
+(chip:cp-shape-free ball-shape)
+(chip:cp-shape-free ground)
+(chip:cp-body-free  ball-body)
+(chip:cp-space-free cspace)
+