mirror of
https://codeberg.org/noisytoot/notnotdnethack.git
synced 2024-09-19 14:05:02 +01:00
Ron Nazarov
6a4ef23ca9
With formatting adjustments to the circle_data change and increasing MAX_RADIUS and make-circle-data.lisp to match.
36 lines
1.5 KiB
Common Lisp
36 lines
1.5 KiB
Common Lisp
;;;; -*- mode: lisp; indent-tabs-mode: nil -*-
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;;;; SPDX-FileCopyrightText: 2024 Ron Nazarov
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;;;; SPDX-License-Identifier: NGPL OR GPL-2.0-or-later
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;;;; This is the script used to generate the circle_data[] array in vision.c.
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;;;; You do not need to run this unless you want to modify circle_data[].
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;;;; How to use:
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;;;; - Run with any Common Lisp implementation
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;;;; - Copy/paste the output into vision.c
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;;;; - Don't forget to also update MAX_RADIUS and circle_start[]
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(defun circle-limit-offset (max-radius current-radius)
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(floor (sqrt (- (+ (expt max-radius 2) max-radius) (expt current-radius 2)))))
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(defun make-circle-data (max-radius)
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(loop for max-radius from 1 to max-radius
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collect (loop for current-radius from 0 to max-radius
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collect (circle-limit-offset max-radius current-radius))))
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(defun print-circle-data (data)
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(let ((absolute-index 0)
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(max-radius (length (car (last data)))))
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(format t "char circle_data[] = {~%")
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(loop for line in data
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do (loop for relative-index from 0
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for num in line
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do (if (= relative-index 0)
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(format t "/*~3d*/~2d," absolute-index num)
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(format t "~d," num))
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(incf absolute-index))
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(terpri))
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(format t "/*~3d*/ ~d /* should be MAX_RADIUS+1; used to terminate range loops -dlc */~%};~%"
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absolute-index max-radius)))
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(print-circle-data (make-circle-data 33))
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