kindred/create
1
1
Fork 0
Code Issues 37 Pull Requests Actions Packages Projects 9 Releases 2 Wiki Activity

Gui: Add tests to automatically verify the axonometric views

Browse Source
This commit is contained in:
Benjamin Nauck
2025-04-10 22:14:32 +02:00
committed by Kacper Donat
parent c0e03c42da
commit 84b4ef32bc
4 changed files with 232 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
src/Gui/Camera.cpp
View File

@@ -29,70 +29,6 @@
using namespace Gui;
/**
Formulas to get quaternion for axonometric views:
\code
from math import sqrt, degrees, asin, atan
p1=App.Rotation(App.Vector(1,0,0),90)
p2=App.Rotation(App.Vector(0,0,1),alpha)
p3=App.Rotation(p2.multVec(App.Vector(1,0,0)),beta)
p4=p3.multiply(p2).multiply(p1)
from pivy import coin
c=Gui.ActiveDocument.ActiveView.getCameraNode()
c.orientation.setValue(*p4.Q)
\endcode
The angles alpha and beta depend on the type of axonometry
Isometric:
\code
alpha=45
beta=degrees(asin(-sqrt(1.0/3.0)))
\endcode
Dimetric:
\code
alpha=degrees(asin(sqrt(1.0/8.0)))
beta=degrees(-asin(1.0/3.0))
\endcode
Trimetric:
\code
alpha=30.0
beta=-35.0
\endcode
Verification code that the axonomtries are correct:
\code
from pivy import coin
c=Gui.ActiveDocument.ActiveView.getCameraNode()
vo=App.Vector(c.getViewVolume().getMatrix().multVecMatrix(coin.SbVec3f(0,0,0)).getValue())
vx=App.Vector(c.getViewVolume().getMatrix().multVecMatrix(coin.SbVec3f(10,0,0)).getValue())
vy=App.Vector(c.getViewVolume().getMatrix().multVecMatrix(coin.SbVec3f(0,10,0)).getValue())
vz=App.Vector(c.getViewVolume().getMatrix().multVecMatrix(coin.SbVec3f(0,0,10)).getValue())
(vx-vo).Length
(vy-vo).Length
(vz-vo).Length
# Projection
vo.z=0
vx.z=0
vy.z=0
vz.z=0
(vx-vo).Length
(vy-vo).Length
(vz-vo).Length
\endcode
See also:
http://www.mathematik.uni-marburg.de/~thormae/lectures/graphics1/graphics_6_2_ger_web.html#1
http://www.mathematik.uni-marburg.de/~thormae/lectures/graphics1/code_v2/Axonometric/qt/Axonometric.cpp
https://de.wikipedia.org/wiki/Arkussinus_und_Arkuskosinus
*/
SbRotation Camera::top()
{
return {0, 0, 0, 1};
@@ -127,35 +63,31 @@ SbRotation Camera::left()
SbRotation Camera::isometric()
{
//from math import sqrt, degrees, asin
//p1=App.Rotation(App.Vector(1,0,0),45)
//p2=App.Rotation(App.Vector(0,0,1),-45)
//p3=p2.multiply(p1)
//return SbRotation(0.353553f, -0.146447f, -0.353553f, 0.853553f);
//from math import sqrt, degrees, asin
//p1=App.Rotation(App.Vector(1,0,0),90)
//p2=App.Rotation(App.Vector(0,0,1),135)
//p3=App.Rotation(App.Vector(-1,1,0),degrees(asin(-sqrt(1.0/3.0))))
//p4=p3.multiply(p2).multiply(p1)
//return SbRotation(0.17592, 0.424708, 0.820473, 0.339851);
//from math import sqrt, degrees, asin
//p1=App.Rotation(App.Vector(1,0,0),90)
//p2=App.Rotation(App.Vector(0,0,1),45)
//#p3=App.Rotation(App.Vector(1,1,0),45)
//p3=App.Rotation(App.Vector(1,1,0),degrees(asin(-sqrt(1.0/3.0))))
//p4=p3.multiply(p2).multiply(p1)
// The values here are precalculated as our quaternion implementation
// does not support calculating the values in compile time.
// The values are verified with unit tests.
return {0.424708F, 0.17592F, 0.339851F, 0.820473F};
}
SbRotation Camera::dimetric()
{
// The values here are precalculated as our quaternion implementation
// does not support calculating the values in compile time.
// The values are verified with unit tests.
// While there are multiple ways to calculate the dimetric rotation,
// we use one which is similar to other CAD applications.
return {0.567952F, 0.103751F, 0.146726F, 0.803205F};
}
SbRotation Camera::trimetric()
{
// The values here are precalculated as our quaternion implementation
// does not support calculating the values in compile time.
// The values are verified with unit tests.
// While there are multiple ways to calculate the trimetric rotation,
// we use one which is similar to other CAD applications.
return {0.446015F, 0.119509F, 0.229575F, 0.856787F};
}