Macro Triangle AH

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File:Text-x-python Macro Triangle AH

Description
This macro create one triangle creates a triangle by giving the head angle and the height of the triangle.

Macro version: 00.02
Last modified: 2015-05-03
Author: mario52
Author
mario52
Download
None
Links
Macro Version
00.02
Date last modified
2015-05-03
FreeCAD Version(s)
None
Default shortcut
None
See also
None

Description

This macro create one isosceles triangle by giving the head angle and the height of the triangle (the triangle of the head is positioned to the xyz coordinates 0.0.0)

Use

Copy the macro Triangle AH complete in the Python console FreeCAD

Script

Macro_triangleAH.FCMacro

__title__   = "triangleAH"
__author__  = "Mario52"
__version__ = "00.02"
__date__    = "03/05/2015"
# Give angle and on choice : height or base or hypo
from math import cos, sin, tan, degrees, radians, sqrt
import Draft, Part
def triangleAH(angle, height=0.0, base=0.0, hypo=0.0):
    def line_length(x1 = 0.0, y1 = 0.0, z1 = 0.0, length = 10.0, angle2 = 0.0):  # search coordinates
        x2 = x1 + (length * cos(radians(angle2)))
        y2 = y1 + (length * sin(radians(angle2)))
        z2 = z1 #+ ()
        return x2,y2,z2                                                          # return coordinates (xyz) to point
 
    x0 = y0 = z0 = 0.0
    angle = float(angle)
    height = float(height)
    base = float(base)

    if base != 0:
        height = ( (base/2) / (tan(radians(angle/2))) )                          # imposing base and calculate height
    if hypo != 0:
        height = hypo * (cos(radians(angle/2)))                                  # imposing hypo and calculate height 
    else:
        hypo = height / cos(radians(angle/2))                                    # calculate hypotenuse
    if base==0:                                                                  # base of triangle
        base = (tan(radians(angle/2) ) * height) * 2                             # calculate base

    a0 = line_length(x1=x0,y1=y0,z1=z0,length=height,angle2=0 )                  # coord height of triangle
    a0 = line_length(x1=x0,y1=y0,z1=z0,length=0, angle2 = angle )                # point 0 (begin vertex)
    a  = line_length(x1=a0[0],y1=a0[1],z1=a0[2],length= hypo, angle2=-(angle/2)) #
    b  = line_length(a[0],a[1],a[2],length= (abs(a[1])*2), angle2=90.0)          # base of triangle = (abs(a[1])*2)

    print "angle theet : ", angle
    print "angles base : (", (180-angle)/2,"),(",(180-angle)/2,")"
    print "height      : ", height
    print "base        : ", base
    print "hypotenuse  : ", hypo
    print "surface     : ", (base * height) / 2
    print "_________________________"
    return Draft.makeWire([FreeCAD.Vector(a0),FreeCAD.Vector(a),FreeCAD.Vector(b)],closed=True,face=True,support=None) # create triangle

Example

triangleAH(angle=90, height=10)
# or
triangleAH(90, 10)
# or
triangleAH(45, hypo=10)
# or
triangleAH(90, base=10)

Version

ver 00.02 03/05/2015 : adding "base=0.0", "hypo=0.0" and print data of triangle

ver 00.01 20/03/2015 :