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362 lines
7.5 KiB
Lua
362 lines
7.5 KiB
Lua
--[[ $Id: x14.lua 10793 2010-02-06 01:48:39Z hbabcock $
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Demo of multiple stream/window capability (requires Tk or Tcl-DP).
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Maurice LeBrun
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IFS, University of Texas at Austin
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Copyright (C) 2009 Werner Smekal
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This file is part of PLplot.
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PLplot is free software you can redistribute it and/or modify
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it under the terms of the GNU General Library Public License as published
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by the Free Software Foundation either version 2 of the License, or
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(at your option) any later version.
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PLplot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with PLplot if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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--]]
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-- initialise Lua bindings for PLplot examples.
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dofile("plplot_examples.lua")
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xs = {}
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ys = {}
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space0 = {}
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mark0 = {}
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space1 = { 1500 }
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mark1 = { 1500 }
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function plot1()
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x = {}
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y = {}
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for i = 1, 60 do
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x[i] = xoff + xscale*i/60
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y[i] = yoff + yscale*x[i]^2
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end
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xmin = x[1]
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xmax = x[60]
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ymin = y[1]
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ymax = y[60]
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for i = 1, 6 do
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xs[i] = x[(i-1)*10 + 4]
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ys[i] = y[(i-1)*10 + 4]
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end
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-- Set up the viewport and window using PLENV. The range in X is
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-- 0.0 to 6.0, and the range in Y is 0.0 to 30.0. The axes are
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-- scaled separately (just = 0), and we just draw a labelled
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-- box (axis = 0).
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pl.col0(1)
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pl.env(xmin, xmax, ymin, ymax, 0, 0)
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pl.col0(6)
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pl.lab("(x)", "(y)", "#frPLplot Example 1 - y=x#u2")
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-- Plot the data points
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pl.col0(9)
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pl.poin(xs, ys, 9)
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-- Draw the line through the data
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pl.col0(4)
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pl.line(x, y)
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pl.flush()
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end
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function plot2()
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x = {}
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y = {}
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-- Set up the viewport and window using PLENV. The range in X is -2.0 to
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-- 10.0, and the range in Y is -0.4 to 2.0. The axes are scaled separately
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-- (just = 0), and we draw a box with axes (axis = 1).
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pl.col0(1)
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pl.env(-2, 10, -0.4, 1.2, 0, 1)
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pl.col0(2)
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pl.lab("(x)", "sin(x)/x", "#frPLplot Example 1 - Sinc Function")
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-- Fill up the arrays
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for i = 1, 100 do
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x[i] = (i-20)/6
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y[i] = 1
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if x[i]~=0 then
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y[i] = math.sin(x[i])/x[i]
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end
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end
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-- Draw the line
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pl.col0(3)
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pl.line(x, y)
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pl.flush()
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end
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function plot3()
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x = {}
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y = {}
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-- For the final graph we wish to override the default tick intervals, and
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-- so do not use PLENV
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pl.adv(0)
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-- Use standard viewport, and define X range from 0 to 360 degrees, Y range
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-- from -1.2 to 1.2.
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pl.vsta()
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pl.wind(0, 360, -1.2, 1.2)
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-- Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y.
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pl.col0(1)
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pl.box("bcnst", 60, 2, "bcnstv", 0.2, 2)
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-- Superimpose a dashed line grid, with 1.5 mm marks and spaces. plstyl
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-- expects a pointer!!
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pl.styl(mark1, space1)
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pl.col0(2)
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pl.box("g", 30, 0, "g", 0.2, 0)
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pl.styl(mark0, space0)
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pl.col0(3)
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pl.lab("Angle (degrees)", "sine", "#frPLplot Example 1 - Sine function")
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for i = 1, 101 do
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x[i] = 3.6 * (i-1)
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y[i] = math.sin(x[i]*math.pi/180)
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end
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pl.col0(4)
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pl.line(x, y)
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pl.flush()
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end
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function plot4()
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x0 = {}
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y0 = {}
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x = {}
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y = {}
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dtr = math.pi/180
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for i = 1, 361 do
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x0[i] = math.cos(dtr*(i-1))
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y0[i] = math.sin(dtr*(i-1))
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end
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-- Set up viewport and window, but do not draw box
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pl.env(-1.3, 1.3, -1.3, 1.3, 1, -2)
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for i = 1, 10 do
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for j = 1, 361 do
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x[j] = 0.1*i*x0[j]
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y[j] = 0.1*i*y0[j]
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end
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-- Draw circles for polar grid
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pl.line(x, y)
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end
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pl.col0(2)
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for i = 1, 12 do
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theta = 30.0 * (i-1)
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dx = math.cos(dtr * theta)
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dy = math.sin(dtr * theta)
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-- Draw radial spokes for polar grid
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pl.join(0, 0, dx, dy)
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-- Write labels for angle
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-- Slightly off zero to avoid floating point logic flips at 90 and 270 deg.
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if dx>=-0.00001 then
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pl.ptex(dx, dy, dx, dy, -0.15, tostring(theta))
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else
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pl.ptex(dx, dy, -dx, -dy, 1.15, tostring(theta))
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end
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end
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x = {}
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y = {}
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-- Draw the graph
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for i = 1, 361 do
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r = math.sin(dtr * (5*(i-1)))
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x[i] = x0[i] * r
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y[i] = y0[i] * r
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end
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pl.col0(3)
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pl.line(x, y)
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pl.col0(4)
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pl.mtex("t", 2, 0.5, 0.5, "#frPLplot Example 3 - r(#gh)=sin 5#gh")
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pl.flush()
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end
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-- Demonstration of contour plotting
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XPTS = 35
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YPTS = 46
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XSPA = 2/(XPTS-1)
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YSPA = 2/(YPTS-1)
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tr = { XSPA, 0, -1, 0, YSPA, -1 }
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function mypltr(x, y)
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tx = tr[1]*x + tr[2]*y + tr[3]
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ty = tr[4]*x + tr[5]*y + tr[6]
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return tx, ty
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end
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clevel = { -1, -.8, -.6, -.4, -.2, 0, .2, .4, .6, .8, 1 }
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function plot5()
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mark = { 1500 }
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space = { 1500 }
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-- Set up function arrays
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z = {}
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w = {}
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for i = 1, XPTS do
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xx = (i-1-math.floor(XPTS/2))/math.floor(XPTS/2)
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z[i] = {}
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w[i] = {}
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for j = 1, YPTS do
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yy = (j-1-math.floor(YPTS/2))/math.floor(YPTS/2)-1
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z[i][j] = xx * xx - yy * yy
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w[i][j] = 2 * xx * yy
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end
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end
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pl.env(-1, 1, -1, 1, 0, 0)
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pl.col0(2)
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pl.cont(z, 1, XPTS, 1, YPTS, clevel, "mypltr")
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pl.styl(mark, space)
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pl.col0(3)
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pl.cont(w, 1, XPTS, 1, YPTS, clevel, "mypltr")
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pl.col0(1)
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pl.lab("X Coordinate", "Y Coordinate", "Streamlines of flow")
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pl.flush()
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end
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----------------------------------------------------------------------------
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-- main
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--
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-- Plots several simple functions from other example programs.
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--
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-- This version sends the output of the first 4 plots (one page) to two
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-- independent streams.
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----------------------------------------------------------------------------
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-- Select either TK or DP driver and use a small window
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-- Using DP results in a crash at the end due to some odd cleanup problems
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-- The geometry strings MUST be in writable memory
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geometry_master = "500x410+100+200"
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geometry_slave = "500x410+650+200"
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-- plplot initialization
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-- Parse and process command line arguments
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pl.parseopts(arg, pl.PL_PARSE_FULL)
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-- If valid geometry specified on command line, use it for both streams.
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xp0, yp0, xleng0, yleng0, xoff0, yoff0 = pl.gpage()
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valid_geometry = xleng0>0 and yleng0>0
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-- Set up first stream
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if valid_geometry==true then
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pl.spage(xp0, yp0, xleng0, yleng0, xoff0, yoff0)
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else
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pl.setopt("geometry", geometry_master)
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end
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pl.ssub(2, 2)
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pl.init()
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driver = pl.gdev()
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fam, num, bmax = pl.gfam()
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print("Demo of multiple output streams via the " .. driver .." driver.")
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print("Running with the second stream as slave to the first.\n")
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-- Start next stream
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pl.sstrm(1)
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if valid_geometry==true then
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pl.spage(xp0, yp0, xleng0, yleng0, xoff0, yoff0)
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else
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pl.setopt("geometry", geometry_slave)
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end
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-- Turn off pause to make this a slave (must follow master)
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pl.spause(0)
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pl.sdev(driver)
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pl.sfam(fam,num,bmax)
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-- Currently number of digits in format number can only be
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--set via the command line option
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pl.setopt("fflen", "2")
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pl.init()
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-- Set up the data & plot
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-- Original case
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pl.sstrm(0)
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xscale = 6
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yscale = 1
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xoff = 0
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yoff = 0
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plot1()
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-- Set up the data & plot
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xscale = 1
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yscale = 1e6
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plot1()
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-- Set up the data & plot
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xscale = 1.
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yscale = 1.e-6
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digmax = 2
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pl.syax(digmax, 0)
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plot1()
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-- Set up the data & plot
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xscale = 1
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yscale = 0.0014
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yoff = 0.0185
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digmax = 5
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pl.syax(digmax, 0)
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plot1()
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-- To slave
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-- The pleop() ensures the eop indicator gets lit.
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pl.sstrm(1)
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plot4()
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pl.eop()
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-- Back to master
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pl.sstrm(0)
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plot2()
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plot3()
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-- To slave
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pl.sstrm(1)
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plot5()
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pl.eop()
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-- Back to master to wait for user to advance
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pl.sstrm(0)
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pl.eop()
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-- Call plend to finish off.
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pl.plend()
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