Set the "DrawCircle" orientation to face camera

mfersaoui

Hello,

How to set the orientation of "DrawCircle" to face the camera like in Orientation Property of Null Object.

info = c4d.HandleInfo()
# Defines the position and the size of the circle
circleSettings = bh.GetMg()
circleSettings.off = info.position
circleSettings.v1 *= 20
circleSettings.v2 *= 20
circleSettings.v3 *= 20

# Draw the Circle
bd.DrawCircle(circleSettings)

Thank you.

s_bach

Hello,

as always, please mark your post as a question.

Can you share a little more information about what you are actually doing? What is the context of the code you provided?

If you want to draw a circle in screen space, the easiest thing would be to just draw a 2D circle using DrawCircle2D().

# This example draws a 2D line, circle and point.

bd.SetMatrix_Screen()

center = c4d.Vector(100.0, 100.0, 0)
tangentPoint = c4d.Vector(150.0, 100.0, 0)

# draw line and circle
bd.SetPen(c4d.Vector(0.8))
bd.DrawLine2D(center, tangentPoint)
bd.DrawCircle2D(center.x, center.y, tangentPoint.x - center.x)

# draw point
bd.SetPen(c4d.Vector(1.0))
bd.DrawPoint2D(center)


bd.SetMatrix_Matrix(None, c4d.Matrix())

best wishes,
Sebastian

mfersaoui

@s_bach
Hello,
I want use it on the ObjectData.Draw() function.

Here is the full code:

def Draw(self, op, drawpass, bd, bh):
    if drawpass != c4d.DRAWPASS_HANDLES:
        return c4d.DRAWRESULT_SKIP

    bd.SetMatrix_Matrix(op, bh.GetMg())
    hitid = op.GetHighlightHandle(bd)

    for i in xrange(self.GetHandleCount(op)):

        color = c4d.GetViewColor(c4d.VIEWCOLOR_SELECTION_PREVIEW) if i == hitid else c4d.GetViewColor(c4d.VIEWCOLOR_ACTIVEPOINT)        

        bd.SetPen(color)

        info = c4d.HandleInfo()
        self.GetHandle(op, i, info)

        bd.DrawHandle(info.position, c4d.DRAWHANDLE_BIG, 0)

        bd.SetMatrix_Matrix(op, bh.GetMg())

        circleSettings = bh.GetMg()
        circleSettings.off = info.position
        circleSettings.v1 *= 20
        circleSettings.v2 *= 20
        circleSettings.v3 *= 20

        bd.DrawCircle(circleSettings)
    
        return c4d.DRAWRESULT_OK

Thank you.

m_magalhaes

hello,

using this to draw a circle at op position. You can use your handle position instead.
The main point is retrieving the view matrix with bd.GetMg() to have you Y and X vectors lined with the view.

       if drawpass == c4d.DRAWPASS_OBJECT:
            rad = 20.0
            bd.SetMatrix_Matrix(op, c4d.Matrix());
            m = bd.GetMg();
            m.off = bh.GetMg().off;
            m.v3 = c4d.Vector(0.0);
            m.v1 *= rad;
            m.v2 *= rad;
            bd.DrawCircle(m);
            return c4d.DRAWRESULT_OK

Cheers,
Manuel

mfersaoui

@m_magalhaes
Thank you. I made some changes but its work!

Cheers,
Mustapha