71 lines
2.6 KiB
Common Lisp
71 lines
2.6 KiB
Common Lisp
(in-package #:flight-sim)
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(defclass model ()
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((vertices :initarg :vertices :accessor vertices :initform (vector) :type shape-vector)
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(faces :initarg :faces :accessor faces :initform (vector) :type shape-ref-vector )
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(colors :initarg :colors :reader colors :initform (vector) :type shape-vector)
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(face-colors :initarg :face-colors :accessor face-colors :initform (vector) :type shape-ref-vector)))
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(defmethod draw ((model model) time)
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(loop for i from 0 to (1- (length (faces model))) do
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(draw-triangle (get-vertecies (aref (faces model) i) (vertices model))
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(get-vertecies (aref (face-colors model) i) (colors model)))))
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(defclass animated-model ()
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((start-time :initarg :start-time :accessor start-time :initform 0.0)))
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(defgeneric scale-colors (model))
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(defmethod scale-colors ((model model))
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(let ((colors (colors model)))
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(loop for i from 0 to (1- (length colors)) do
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(loop for j from 0 to 2 do
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(setf (aref (aref colors i) j) (float (/ (aref (aref colors i) j) 255)))))))
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(defmethod initialize-instance :after ((model model) &key)
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(scale-colors model))
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(defgeneric (setf colors) (colors model))
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(defmethod (setf colors) (colors (model model))
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(setf (slot-value model 'colors) colors)
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(scale-colors model))
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(defun get-vertecies (face vertices)
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(make-array (length face) :initial-contents
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(loop for i across face collecting (aref vertices i))))
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(defun shift-color (time)
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(values
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;;; red
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(/ (+ (* (sin (+ (* 0.3 time) 0)) 127) 128) 255)
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;;; green
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(/ (+ (* (sin (+ (* 0.3 time) (* 2/3 PI))) 127 ) 128) 255)
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;;; blue
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(/ (+ (* (sin (+ (* 0.3 time) (* 4/3 PI))) 127) 128) 255)))
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(defparameter *diamond-model*
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(make-instance 'model
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:vertices (make-2d-array 6 3 '((0.0 1.0 0.0) (0.5 0.0 0.5) (0.5 0.0 -0.5)
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(-0.5 0.0 0.5) (-0.5 0.0 -0.5) (0.0 -1.0 0.0)))
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:faces (make-2d-array 8 3 '((0 3 1) (0 2 4) (0 1 2) (0 4 3)
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(3 5 1) (2 5 4) (1 5 2) (4 5 3)))))
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;; returns a model of a 3 pyramid
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(defun make-model-3pyramid (points &key (face-colors nil) (point-colors nil))
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(make-instance 'model
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:vertices points
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:faces (make-2d-array 4 3 '((0 1 3) (0 2 1) (0 3 2) (1 2 3)))
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:colors (if face-colors face-colors point-colors)
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:face-colors (if face-colors
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(make-2d-array 4 3 '((0 0 0) (1 1 1) (2 2 2) (3 3 3)))
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(make-2d-array 4 3 '((0 1 3) (0 2 1) (0 3 2) (1 2 3))))))
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(defparameter *ship-model*
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(make-model-3pyramid (make-2d-array 4 3 '((0.0 -0.5 -1.5) (0.0 0.5 1.5) (-2.0 -0.5 1.5) (2.0 -0.5 1.5)))
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:face-colors (make-2d-array 4 3 '((196 196 196) (196 196 196) (196 196 196) (32 32 32)))))
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