diff options
Diffstat (limited to 'turtle.lisp')
| -rw-r--r-- | turtle.lisp | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/turtle.lisp b/turtle.lisp index 3869477..9aa9fbc 100644 --- a/turtle.lisp +++ b/turtle.lisp @@ -17,6 +17,8 @@ :initform (v! 0.0 0.0 0.0 0.0)) (rotation :accessor rot :initform (m4:identity)) + (radius :accessor r + :initform 0.0) (pile :accessor pile :initform '()))) @@ -30,9 +32,13 @@ (mapcar #'(lambda (vertex) (add-point (m4:get-column - (m4:* (m4:translation (v4:+ (tra turtle) (v4:*S (m4:get-column (rot turtle) 1) n))) - (rot turtle) - (m4:translation (v4:- (aref *vertices* vertex) (tra turtle)))) + (let* ((x (v4:- (aref *vertices* vertex) (tra turtle))) + (y (v4:*S x (* (r turtle) + (sqrt (v:dot x x)))))) + (m4:* (m4:translation (v4:+ (tra turtle) + (v4:*S (m4:get-column (rot turtle) 1) n))) + (rot turtle) + (m4:translation (v4:- x y)))) 3))) (points turtle))) @@ -43,7 +49,9 @@ (push item *index*)) (setf (points turtle) - new-points) + new-points + (r turtle) + 0.0) (translation turtle n))) (defun jump (turtle n) @@ -53,7 +61,9 @@ (push item *index*)) (setf (points turtle) - new-points) + new-points + (r turtle) + 0.0) (translation turtle n))) ;;; Rotation @@ -92,7 +102,8 @@ "Remember the current state of turtle" (push (list (copy-list (points turtle)) (copy-seq (rot turtle)) - (copy-seq (tra turtle))) + (copy-seq (tra turtle)) + (r turtle)) (pile turtle))) (defun pop-turtle (turtle) @@ -100,7 +111,13 @@ (let ((pile (pop (pile turtle)))) (setf (points turtle) (first pile) (rot turtle) (second pile) - (tra turtle) (third pile)))) + (tra turtle) (third pile) + (r turtle) (fourth pile)))) + +(defun set-radius (turtle r) + "Set how radius need to change." + (setf (r turtle) + (- 1 r))) ;;; Geometry (defun add-point (point) |