#!/bin/bash
# 包含GMT自带脚本文件 其中包含了一些有用的功能 比如获取网格文件的范围
. gmt_shell_functions.sh
# 包含dispOption脚本
. dispOptions.sh
#GMT画一个色度条
# 初始化参数
data='null'
unit='m'
color='rainbow'
range='null'
overwriteRange='null'
overwrite=0
bartick="a" #色标轴标轴间隔 a表示自动
opFile=0
hori=''
# 从命令行获取参数
while getopts "hi:r:u:c:v:os" arg
do
	case $arg in
		h)
			dispTitle "${0##*/}" "plot a color bar using GMT script. The template accepts a grid (.nc .grid) file as input and outputs a .png and a .eps file. \
			For further explanations, please look for GMT's manuscripts."
			dispAuthorInfo "Yi Zhang (zhangyi.cugwuhan@gmail.com)"
			dispUsage "${0##*/} -i<grid-data> [-r<xmin>/<xmax>/<ymin>/<ymax>] [-c<cpt-file>] [-o] [-s] [-u<unit>] [-v<bar-tick>]"
			dispOptionShort "-i" "input grid file."
			dispOptionShort "-r" "data range. The template will detect the input data range automatically, the use of this option will overwrite the range."
			dispOptionShort "-c" "color cpt, The default is rainbow."
			dispOptionShort "-o" "open file in finder, the default is using imgcat."
			dispOptionShort "-s" "plot the color bar horizontally."
			dispOptionShort "-u" "data unit. The default is meter."
			dispOptionShort "-v" "intervals of color bar's labels. the script will set the intervals automatically if -v option is not set."
			exit 0;;
		i)
			data=$OPTARG;;
		u)
			unit=$OPTARG;;
		c)
			color=$OPTARG;;
		v)
			bartick=$OPTARG;;
		r)
			overwrite=1
			overwriteRange=$OPTARG;;
		o)
			opFile=1;;
		v)
			bartick=$OPTARG;;
		s)
			hori='+h';;
		?)
			printf "error: unknow argument\nuse -h option to see help information\n"
			exit 1;;
	esac
done
# 进行必要的参数检查
if [[ $data == "null" ]]; then
	printf "error: no input file name\nuse -h option to see help information\n"
	exit 1
else
	# 初始化临时文件名
	cptfile=user.cpt
	psfile=${data%.*}.ps
	jpgfile=${data%.*}.png
	# 获取网格范围
	if [[ $overwrite == 1 ]]; then
		range=${overwriteRange}
	else
		range=$(gmt_get_gridregion ${data})
	fi
	# 设置绘图参数
	gmt gmtset \
	FONT_ANNOT_PRIMARY=7p,Times-Roman,black \
	MAP_FRAME_PEN=thinnest,black \
	MAP_TICK_LENGTH_PRIMARY=1p/0.5p \
	MAP_TITLE_OFFSET=7p \
	MAP_GRID_CROSS_SIZE_PRIMARY=2p \
	FONT_LABEL=7p,Times-Roman,black \
	MAP_FRAME_AXES=WeSnZ \
	MAP_LABEL_OFFSET=2p \
	MAP_ANNOT_OFFSET_PRIMARY=2.5p

	gmt grd2cpt ${data} -C${color} -R${range} -Z -D > $cptfile

	#-C${cptfile}+Uk 使用km（色标单位除1000
	#如果unit等于km则在cptfile后面添加+Uk
	if [[ ${unit} == 'km+Uk' ]]; then
		gmt psscale -Dx1.6i/0.1i+w1.2i/0.07i${hori} -C${cptfile}+Uk -Bx${bartick} -By+l${unit} > $psfile
	else
		gmt psscale -Dx1.6i/0.1i+w1.2i/0.07i${hori} -C${cptfile} -Bx${bartick} -By+l${unit} > $psfile
	fi
	gmt psconvert $psfile -A -TEG -E500
	# 删除临时文件 使用linux终端rm命令
	rm $cptfile $psfile gmt.history gmt.conf
	if [[ $plotgrad == 1 ]]; then
		rm $gradfile
	fi
	if [[ $opFile == 1 ]]; then
		# 打开图片文件 此命令使用MacOS终端open命令
		open $jpgfile
	else
		# 在终端显示图像 此命令需要imgcat.sh脚本和iTerm终端
		imgcat $jpgfile
	fi
fi