mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-12-22 10:42:25 +02:00
377 lines
10 KiB
Lua
377 lines
10 KiB
Lua
--[[ $Id: x28.lua 10710 2009-12-08 06:51:27Z airwin $
|
|
|
|
pl.mtex3, plptex3 demo.
|
|
|
|
Copyright (C) 2009 Werner Smekal
|
|
|
|
This file is part of PLplot.
|
|
|
|
PLplot is free software you can redistribute it and/or modify
|
|
it under the terms of the GNU General Library Public License as published
|
|
by the Free Software Foundation either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
PLplot is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with PLplot if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
--]]
|
|
|
|
|
|
-- initialise Lua bindings for PLplot examples.
|
|
dofile("plplot_examples.lua")
|
|
|
|
-- Choose these values to correspond to tick marks.
|
|
XPTS = 2
|
|
YPTS = 2
|
|
NREVOLUTION = 16
|
|
NROTATION = 8
|
|
NSHEAR = 8
|
|
|
|
----------------------------------------------------------------------------
|
|
-- main
|
|
--
|
|
-- Demonstrates plotting text in 3D.
|
|
----------------------------------------------------------------------------
|
|
|
|
xmin=0
|
|
xmax=1
|
|
xmid = 0.5*(xmax + xmin)
|
|
xrange = xmax - xmin
|
|
ymin=0
|
|
ymax=1
|
|
ymid = 0.5*(ymax + ymin)
|
|
yrange = ymax - ymin
|
|
zmin=0
|
|
zmax=1
|
|
zmid = 0.5*(zmax + zmin)
|
|
zrange = zmax - zmin
|
|
ysmin = ymin + 0.1 * yrange
|
|
ysmax = ymax - 0.1 * yrange
|
|
ysrange = ysmax - ysmin
|
|
dysrot = ysrange / ( NROTATION - 1 )
|
|
dysshear = ysrange / ( NSHEAR - 1 )
|
|
zsmin = zmin + 0.1 * zrange
|
|
zsmax = zmax - 0.1 * zrange
|
|
zsrange = zsmax - zsmin
|
|
dzsrot = zsrange / ( NROTATION - 1 )
|
|
dzsshear = zsrange / ( NSHEAR - 1 )
|
|
|
|
pstring = "The future of our civilization depends on software freedom."
|
|
|
|
-- Allocate and define the minimal x, y, and z to insure 3D box
|
|
x = {}
|
|
y = {}
|
|
z = {}
|
|
|
|
for i = 1, XPTS do
|
|
x[i] = xmin + (i-1) * (xmax-xmin)/(XPTS-1)
|
|
end
|
|
|
|
for j = 1, YPTS do
|
|
y[j] = ymin + (j-1) * (ymax-ymin)/(YPTS-1)
|
|
end
|
|
|
|
for i = 1, XPTS do
|
|
z[i] = {}
|
|
for j = 1, YPTS do
|
|
z[i][j] = 0
|
|
end
|
|
end
|
|
|
|
-- Parse and process command line arguments
|
|
pl.parseopts(arg, pl.PL_PARSE_FULL)
|
|
|
|
pl.init()
|
|
|
|
-- Page 1: Demonstrate inclination and shear capability pattern.
|
|
pl.adv(0)
|
|
pl.vpor(-0.15, 1.15, -0.05, 1.05)
|
|
pl.wind(-1.2, 1.2, -0.8, 1.5)
|
|
pl.w3d(1, 1, 1, xmin, xmax, ymin, ymax, zmin, zmax, 20, 45)
|
|
|
|
pl.col0(2)
|
|
pl.box3("b", "", xmax-xmin, 0,
|
|
"b", "", ymax-ymin, 0,
|
|
"bcd", "", zmax-zmin, 0)
|
|
|
|
-- z = zmin.
|
|
pl.schr(0, 1)
|
|
for i = 1, NREVOLUTION do
|
|
omega = 2*math.pi*(i-1)/NREVOLUTION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
x_inclination = 0.5*xrange*cos_omega
|
|
y_inclination = 0.5*yrange*sin_omega
|
|
z_inclination = 0
|
|
x_shear = -0.5*xrange*sin_omega
|
|
y_shear = 0.5*yrange*cos_omega
|
|
z_shear = 0
|
|
pl.ptex3( xmid, ymid, zmin, x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear, 0, " revolution")
|
|
end
|
|
|
|
-- x = xmax.
|
|
pl.schr(0, 1)
|
|
for i = 1, NREVOLUTION do
|
|
omega = 2.*math.pi*(i-1)/NREVOLUTION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
x_inclination = 0.
|
|
y_inclination = -0.5*yrange*cos_omega
|
|
z_inclination = 0.5*zrange*sin_omega
|
|
x_shear = 0
|
|
y_shear = 0.5*yrange*sin_omega
|
|
z_shear = 0.5*zrange*cos_omega
|
|
pl.ptex3(xmax, ymid, zmid, x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear, 0, " revolution")
|
|
end
|
|
|
|
-- y = ymax.
|
|
pl.schr(0, 1)
|
|
for i = 1, NREVOLUTION do
|
|
omega = 2.*math.pi*(i-1)/NREVOLUTION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
x_inclination = 0.5*xrange*cos_omega
|
|
y_inclination = 0.
|
|
z_inclination = 0.5*zrange*sin_omega
|
|
x_shear = -0.5*xrange*sin_omega
|
|
y_shear = 0.
|
|
z_shear = 0.5*zrange*cos_omega
|
|
pl.ptex3(xmid, ymax, zmid, x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear, 0, " revolution")
|
|
end
|
|
|
|
-- Draw minimal 3D grid to finish defining the 3D box.
|
|
pl.mesh(x, y, z, pl.DRAW_LINEXY)
|
|
|
|
-- Page 2: Demonstrate rotation of string around its axis.
|
|
pl.adv(0)
|
|
pl.vpor(-0.15, 1.15, -0.05, 1.05)
|
|
pl.wind(-1.2, 1.2, -0.8, 1.5)
|
|
pl.w3d(1, 1, 1, xmin, xmax, ymin, ymax, zmin, zmax, 20, 45)
|
|
|
|
pl.col0(2)
|
|
pl.box3("b", "", xmax-xmin, 0,
|
|
"b", "", ymax-ymin, 0,
|
|
"bcd", "", zmax-zmin, 0)
|
|
|
|
-- y = ymax.
|
|
pl.schr(0, 1)
|
|
x_inclination = 1
|
|
y_inclination = 0
|
|
z_inclination = 0
|
|
x_shear = 0
|
|
for i = 1, NROTATION do
|
|
omega = 2.*math.pi*(i-1)/NROTATION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
y_shear = 0.5*yrange*sin_omega
|
|
z_shear = 0.5*zrange*cos_omega
|
|
zs = zsmax - dzsrot * (i-1)
|
|
pl.ptex3(xmid, ymax, zs,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "rotation for y = y#dmax#u")
|
|
end
|
|
|
|
-- x = xmax.
|
|
pl.schr(0, 1)
|
|
x_inclination = 0
|
|
y_inclination = -1
|
|
z_inclination = 0
|
|
y_shear = 0
|
|
for i = 1, NROTATION do
|
|
omega = 2.*math.pi*(i-1)/NROTATION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
x_shear = 0.5*xrange*sin_omega
|
|
z_shear = 0.5*zrange*cos_omega
|
|
zs = zsmax - dzsrot * (i-1)
|
|
pl.ptex3(xmax, ymid, zs,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "rotation for x = x#dmax#u")
|
|
end
|
|
|
|
-- z = zmin.
|
|
pl.schr(0, 1)
|
|
x_inclination = 1
|
|
y_inclination = 0
|
|
z_inclination = 0
|
|
x_shear = 0
|
|
for i = 1, NROTATION do
|
|
omega = 2.*math.pi*(i-1)/NROTATION
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
y_shear = 0.5*yrange*cos_omega
|
|
z_shear = 0.5*zrange*sin_omega
|
|
ys = ysmax - dysrot * (i-1)
|
|
pl.ptex3(xmid, ys, zmin,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "rotation for z = z#dmin#u")
|
|
end
|
|
|
|
-- Draw minimal 3D grid to finish defining the 3D box.
|
|
pl.mesh(x, y, z, pl.DRAW_LINEXY)
|
|
|
|
-- Page 3: Demonstrate shear of string along its axis.
|
|
-- Work around xcairo and pngcairo (but not pscairo) problems for
|
|
-- shear vector too close to axis of string. (N.B. no workaround
|
|
-- would be domega = 0.)
|
|
domega = 0.05
|
|
pl.adv(0)
|
|
pl.vpor(-0.15, 1.15, -0.05, 1.05)
|
|
pl.wind(-1.2, 1.2, -0.8, 1.5)
|
|
pl.w3d(1, 1, 1, xmin, xmax, ymin, ymax, zmin, zmax, 20, 45)
|
|
|
|
pl.col0(2)
|
|
pl.box3("b", "", xmax-xmin, 0,
|
|
"b", "", ymax-ymin, 0,
|
|
"bcd", "", zmax-zmin, 0)
|
|
|
|
-- y = ymax.
|
|
pl.schr(0, 1)
|
|
x_inclination = 1
|
|
y_inclination = 0
|
|
z_inclination = 0
|
|
y_shear = 0
|
|
for i = 1, NSHEAR do
|
|
omega = domega + 2.*math.pi*(i-1)/NSHEAR
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
x_shear = 0.5*xrange*sin_omega
|
|
z_shear = 0.5*zrange*cos_omega
|
|
zs = zsmax - dzsshear * (i-1)
|
|
pl.ptex3(xmid, ymax, zs,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "shear for y = y#dmax#u")
|
|
end
|
|
|
|
-- x = xmax.
|
|
pl.schr(0, 1)
|
|
x_inclination = 0
|
|
y_inclination = -1
|
|
z_inclination = 0
|
|
x_shear = 0
|
|
for i = 1, NSHEAR do
|
|
omega = domega + 2.*math.pi*(i-1)/NSHEAR
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
y_shear = -0.5*yrange*sin_omega
|
|
z_shear = 0.5*zrange*cos_omega
|
|
zs = zsmax - dzsshear * (i-1)
|
|
pl.ptex3(xmax, ymid, zs,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "shear for x = x#dmax#u")
|
|
end
|
|
|
|
-- z = zmin.
|
|
pl.schr(0, 1)
|
|
x_inclination = 1
|
|
y_inclination = 0
|
|
z_inclination = 0
|
|
z_shear = 0
|
|
for i = 1, NSHEAR do
|
|
omega = domega + 2.*math.pi*(i-1)/NSHEAR
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
y_shear = 0.5*yrange*cos_omega
|
|
x_shear = 0.5*xrange*sin_omega
|
|
ys = ysmax - dysshear * (i-1)
|
|
pl.ptex3(xmid, ys, zmin,
|
|
x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear,
|
|
0.5, "shear for z = z#dmin#u")
|
|
end
|
|
|
|
-- Draw minimal 3D grid to finish defining the 3D box.
|
|
pl.mesh(x, y, z, pl.DRAW_LINEXY)
|
|
|
|
-- Page 4: Demonstrate drawing a string on a 3D path.
|
|
pl.adv(0)
|
|
pl.vpor(-0.15, 1.15, -0.05, 1.05)
|
|
pl.wind(-1.2, 1.2, -0.8, 1.5)
|
|
pl.w3d(1, 1, 1, xmin, xmax, ymin, ymax, zmin, zmax, 40, -30)
|
|
|
|
pl.col0(2)
|
|
pl.box3("b", "", xmax-xmin, 0,
|
|
"b", "", ymax-ymin, 0,
|
|
"bcd", "", zmax-zmin, 0)
|
|
|
|
pl.schr(0, 1.2)
|
|
-- domega controls the spacing between the various characters of the
|
|
-- string and also the maximum value of omega for the given number
|
|
-- of characters in *pstring.
|
|
domega = 2.*math.pi/string.len(pstring)
|
|
omega = 0
|
|
|
|
-- 3D function is a helix of the given radius and pitch
|
|
radius = 0.5
|
|
pitch = 1/(2*math.pi)
|
|
|
|
for i = 1, string.len(pstring) do
|
|
sin_omega = math.sin(omega)
|
|
cos_omega = math.cos(omega)
|
|
xpos = xmid + radius*sin_omega
|
|
ypos = ymid - radius*cos_omega
|
|
zpos = zmin + pitch*omega
|
|
|
|
-- In general, the inclination is proportional to the derivative of
|
|
--the position wrt theta.
|
|
x_inclination = radius*cos_omega
|
|
y_inclination = radius*sin_omega
|
|
z_inclination = pitch
|
|
|
|
-- The shear vector should be perpendicular to the 3D line with Z
|
|
-- component maximized, but for low pitch a good approximation is
|
|
--a constant vector that is parallel to the Z axis.
|
|
x_shear = 0
|
|
y_shear = 0
|
|
z_shear = 1
|
|
pl.ptex3(xpos, ypos, zpos, x_inclination, y_inclination, z_inclination,
|
|
x_shear, y_shear, z_shear, 0.5, string.sub(pstring, i, i))
|
|
omega = omega + domega
|
|
end
|
|
|
|
-- Draw minimal 3D grid to finish defining the 3D box.
|
|
pl.mesh(x, y, z, pl.DRAW_LINEXY)
|
|
|
|
-- Page 5: Demonstrate pl.mtex3 axis labelling capability
|
|
pl.adv(0)
|
|
pl.vpor(-0.15, 1.15, -0.05, 1.05)
|
|
pl.wind(-1.2, 1.2, -0.8, 1.5)
|
|
pl.w3d(1, 1, 1, xmin, xmax, ymin, ymax, zmin, zmax, 20, 45)
|
|
|
|
pl.col0(2)
|
|
pl.box3("b", "", xmax-xmin, 0,
|
|
"b", "", ymax-ymin, 0,
|
|
"bcd", "", zmax-zmin, 0)
|
|
|
|
pl.schr(0, 1)
|
|
pl.mtex3("xp", 3, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("xp", 4.5, 0.5, 0.5, "primary X-axis label")
|
|
pl.mtex3("xs", -2.5, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("xs", -1, 0.5, 0.5, "secondary X-axis label")
|
|
pl.mtex3("yp", 3, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("yp", 4.5, 0.5, 0.5, "primary Y-axis label")
|
|
pl.mtex3("ys", -2.5, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("ys", -1, 0.5, 0.5, "secondary Y-axis label")
|
|
pl.mtex3("zp", 4.5, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("zp", 3, 0.5, 0.5, "primary Z-axis label")
|
|
pl.mtex3("zs", -2.5, 0.5, 0.5, "Arbitrarily displaced")
|
|
pl.mtex3("zs", -1, 0.5, 0.5, "secondary Z-axis label")
|
|
|
|
-- Draw minimal 3D grid to finish defining the 3D box.
|
|
pl.mesh(x, y, z, pl.DRAW_LINEXY)
|
|
|
|
pl.plend()
|