65 lines
2.3 KiB
Common Lisp
65 lines
2.3 KiB
Common Lisp
(in-package #:flight-sim)
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(defclass engine-object (game-object)
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((start-time :initarg :start-time :accessor start-time :initform 0)
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;; time till fully active
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(activation-time :initarg :activation-time :accessor activation-time :initform 0)
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(force :initarg :force :accessor force :initform (make-instance 'force))))
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(defmethod activate ((object engine-object) start-time)
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(setf (start-time object) start-time))
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(defclass engine-model (model)
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((template-vertices :initarg :template-vertices :accessor template-vertices :initform nil)
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(template-colors :initarg :template-colors :accessor template-colors :initform nil)))
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(defun generate-step-2d-array (2darr time)
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(let ((len-arr (length 2darr))
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(len-row (length (first 2darr))))
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(make-2d-array len-arr len-row
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(loop for row in 2darr collecting
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(loop for item in row collecting
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;(let ((item (aref (aref 2darr i) j)))
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(if (listp item)
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(converge (first item) (second item) (third item) time)
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item))))))
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; take 2 seconds to fully fire
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(defmethod regen-model ((model engine-model) time)
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(setf (vertices model) (generate-step-2d-array (template-vertices model) time))
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(setf (colors model) (generate-step-2d-array (template-colors model) time)))
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(defparameter *thruster-vertices*
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'((0.0 0.5 0.0) (-2.0 -0.5 0.0) (2.0 -0.5 0.0)
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; z goes from 0 to 1 in 2 seconds
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(0.0 0.0 (0 1.5 2))))
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(defparameter *thruster-colors*
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'(((32 64 2) (32 132 2) (32 164 2))
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((32 64 2) (32 132 2) (32 164 2))
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((32 64 2) (32 132 2) (32 164 2))
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((0 255 2) (0 255 2) (64 255 2))))
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;; jet shooting up
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(defparameter *jet-vertices*
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'((0 0 -0.2) (-0.2 0 0.2) (0.2 0 0.2) (0 (0 0.4 1) 0)))
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(defmethod draw ((object engine-object) time)
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(if (< (- time (start-time object)) (activation-time object)) ;; hack since times are in templates!!!
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(regen-model (model object) (- time (start-time object))))
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(call-next-method))
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(defmethod get-accel ((src engine-object) (target game-object))
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(let* ((force-used (scalar-proj (scale-vector-1 (direction (force src))) (scale-vector-1 (coords (body src)))))
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(accel (/ (* (newtons (force src)) force-used) (mass (body target))))
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(accel-vec (scale-vector (scale-vector-1 (direction (force src))) (- accel))))
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accel-vec))
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