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Scilabヘルプ >> Graphics > axes_operations > isoview

isoview

tunes isometric rendering of graphical axes

Syntax

isoview
isoview on
isoview off
isoview(idGraphics [,"on"|"off"])
isoview(xmin, xmax, ymin, ymax)    // DEPRECATED. use replot()

Arguments

"on" | "off" | <none>
Enables or disables or switches the isometric rendering for all considered axes.

idGraphics
Vector of graphic handles. All the related axes are processed. By default, the current axes is processed.

xmin, xmax, ymin, ymax
Four decimal numbers: new axes bounds.
These parameters will be removed from Scilab 6.1. Please use replot after isoview instead.

Description

isoview is used to set or relax isometric rendering scales on the x, y (and z) axes, without changing the size of the graphic window.

isoview() or simply isoview toggles the isoview status of the current axes, and keeps its current bounds: isometric scales are set whenever they were free, or scales are relaxed whenever they were isometric.

isoview("on") or isoview on sets isometric scales for the current axes.

isoview("off") or isoview off relaxes x, y (and z) scales for the current axes.

isoview(idGraphics,..) runs on axes related to each graphic object listed in the vector idGraphics:

  • If idGraphics(i) is a figure's handle, all its Axes are considered.
  • If idGraphics(i) is an Axes, it is considered as is.
  • If idGraphics(i) is the handle of a sub-axes component (such as a polyline, a compound, etc), its hosting axes is considered.

isoview(xmin, xmax, ymin, ymax) sets the current axes in isometric mode, and then sets its bounds to the given values.

This usage is deprecated and will be removed from Scilab 6.1 onwards. Please use replot after isoview instead.

The current axes graphical entity is still the same after calling isoview(..).
To plot some curves directly in isometric mode without calling isoview afterwards, the plot2d(...,frameflag=4) option may be used at call time.
Rendering according to .isoview and .cube_scaling settings

isoview(..)gca().isoview gca().cube_scaling Rendering
onon off X, Y and Z are isometric
offoff on independent X, Y and Z scales. In 3D, improved aspect ratios when X/Y/Z ranges are very different.
off off Independent X, Y, Z scales. In 3D, rendered X/Y/Z scales ratios are close to the data ones
on on Scales are such that the axes looks square or cubic

Examples

t = [0:0.1:2*%pi]';
clf
nc = 3;

subplot(2,nc,1)
plot2d(cos(t),sin(t))
xtitle("True circle")
a1 = gca();

subplot(2,nc,nc+1)
plot2d(cos(t),sin(t))
isoview

subplot(2,nc,2)
plot2d(7*cos(t),2*sin(t))
xtitle("True ellipse")
a2 = gca();

subplot(2,nc,nc+2)
plot2d(7*cos(t),2*sin(t))
isoview

// plot of a sphere using facets computed by eval3dp
deff("[x,y,z] = sph(alp,tet)",[
    "x = r*cos(alp).*cos(tet)+orig(1)*ones(tet)"; ..
    "y = r*cos(alp).*sin(tet)+orig(2)*ones(tet)"; ..
    "z = r*sin(alp)+orig(3)*ones(tet)"]);
r = 3; orig = [0 0 0];
[xx,yy,zz] = eval3dp(sph,linspace(-%pi/2,%pi/2,40),linspace(0,%pi*2,40));
subplot(2,nc,3)
plot3d(xx, yy, zz, alpha=60, flag=[color("green") 8 4])
zlabel("isoview off", "rotation", -90, "fontsize",4)
xtitle("True sphere")
a3 = gca();
subplot(2,nc,nc+3)
plot3d(xx, yy, zz, alpha=60, flag=[color("green") 8 4])
zlabel("isoview on", "rotation", -90, "fontsize",4)
isoview

// Switching isoview status for all axes
isoview(gcf())

// Forcing isoview for all axes of the current figure
isoview(gcf(), "on")

// Relaxing isoview for the current axes
isoview off

// Setting isoview for top axes
isoview(gcf(),"off")
isoview([a1 a2 a3], "on")
// Using plot2d(..., frameflag=4) :
r = linspace(1,10,200);
t = r*3;
scf();
subplot(1,2,1)
plot2d(r.*sin(t),r.*cos(t))
xtitle("plot2d(..)")

subplot(1,2,2)
plot2d(r.*sin(t),r.*cos(t),frameflag=4)
xtitle("with frameflag=4")

See also

  • replot — 新しい境界を指定してカレントまたは指定した軸で再描画
  • Axes properties — axesエンティティプロパティの説明

History

バージョン記述
6.0.0
  • input flags "on"|"off" added.
  • input parameters <none> or idGraphics added.
  • isoview(xmin, xmax, ymin, ymax) marked as deprecated.
6.0.2 "isoview on" now forces .cube_scaling="off", and "isoview off" forces .cube_scaling="on".
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Last updated:
Thu Feb 14 15:02:15 CET 2019