Test to create SolarPath Object

[chakkree]

Test for start concept.
But Part.Circle is not clear round.
How to define number's segment of a circle.

SolarPath.py:

Code: Select all

"""
  SolarPath.py
"""


import FreeCAD , Draft  , Part
from  FreeCAD import Vector , Placement
from Units import Unit,Quantity



class SolarPath():
    def __init__(self, obj):
        obj.addProperty("App::PropertyPlacement","Placement","Base","")
        obj.addProperty("App::PropertyLength","R","SolarPath","Radius of Solr Path")
        obj.addProperty("App::PropertyLength","t","SolarPath","Thickness of Ring")

        obj.R = Quantity('20000 mm')
        obj.t = Quantity('1000 mm')

        obj.Proxy = self

    def onChanged(self, fp, prop):
        if prop == "R" or prop == "t":
            self.execute(fp)


    def execute(self, fp):
        Ext = Quantity('500 mm')
        R = fp.R
        R2 = R - fp.t
        geoms = []
        
        AxisX =Part.Line( Vector (R+Ext,0,0) ,Vector(-R-Ext,0,0) )
        geoms.append(AxisX.toShape()) 


        AxisY =Part.Line( Vector (0,R+Ext,0) ,Vector(0,-R-Ext,0) )
        geoms.append(AxisY.toShape()) 

        Circle1 = Part.Circle() 
        Circle1.Radius = R
        geoms.append(Circle1.toShape()) 

        Circle2 = Part.Circle() 
        Circle2.Radius = R2
        geoms.append(Circle2.toShape()) 

        
        for iAngle in range(0,360,15):
            if iAngle%90 > 0 :
                pl = Placement(Vector(0,0,0),Vector(0,0,1),iAngle  )
                tick = Part.Line( Vector (0,R2,0) ,Vector(0,R+Ext,0) )
                tick.rotate(pl)
                geoms.append(tick.toShape()) 

        for iAngle in range(0,360,5):
            if iAngle%15 > 0 :
                pl = Placement(Vector(0,0,0),Vector(0,0,1),iAngle  )
                minor_tick = Part.Line( Vector (0,R2,0) ,Vector(0,R,0) )
                minor_tick.rotate(pl)
                geoms.append(minor_tick.toShape()) 

        Repr = Part.Compound(geoms)
        Repr.Placement = fp.Placement
        fp.Shape = Repr


def makeSolarPath():
    doc = FreeCAD.activeDocument()
    if doc == None:
        doc = FreeCAD.newDocument()
    obj=doc.addObject("Part::FeaturePython","SolarPath") #add object to document
    obj.Label = "SolarPath"

    
    SolarPath(obj)
    obj.ViewObject.Proxy=0
    viewObject = Gui.ActiveDocument.getObject(obj.Name)
    viewObject.LineColor = (0.61,0.61,0.61)

    #ViewProviderBox(a.ViewObject)


makeSolarPath()
FreeCAD.ActiveDocument.recompute()

[DeepSOIC]

hi!
The circle is internally clear round. It's only displayed segmented, because only rendering of lines is possible.
You can increase the fidelity of display by changing Deviation property (view tab in property editor, or .ViewObject.Deviation from within a script).

[chakkree]

Thank you so much. Very beautiful.

[yorik]

Very cool! having a good solar path system would be very useful, keep working on this!

[damian]

Hello chakkree:

I like your idea of a solar path. I would like to follow your work.

Please, could you explain briefly the principle of your formulation?

I've been revisiting my old books and I think to remember that in order to place the sun on the sky (elevation and azimuth) it's necessary to apply the Benford and Bock formulation. In addition, it's possible to elaborate the stereographic projection of the solar path on a location over a year.

Your script seems to take a more direct way.

Thank you.

[chakkree]

At first is that I want to build a grid object.
started to study with ArchAxis.py
I tested the command to create lines.

I do a search on google with the word 'gbXML'.
I found a Solar's Path image.
I created three-dimensional chart With lines and circles.It doesn't affect models.

[damian]

Good morning:

I do a search on google with the word 'gbXML'

Okey. I see a lot of examples there.

sunpath.png (58.97 KiB) Viewed 3293 times

I created three-dimensional chart With lines and circles.It doesn't affect models

Okey. I reaffirm my interest.

Thank you.

[chakkree]

I found forum in topic "shadows in the freecad viewport" by Mr.Yorik

"shadows in the freecad viewport " viewtopic.php?t=9663

[chakkree]

Solar Geometry
Steven V. Szokolay

http://plea-arch.org/wp-content/uploads ... OMETRY.pdf

[damian]

http://rhodesmill.org/pyephem/

Given a date and location on the Earth’s surface, it can compute the positions of the Sun and Moon, of the planets and their moons, and of any asteroids, comets, or earth satellites whose orbital elements the user can provide.