drawing/logo in a schematic view

Hi Dan,

Thanks for the feedback. Unfortunately I didn't spend a lot of time trying to make the parser really robust (in other words I used empirical examples rather than trying to find the XPM specification and ensure that I was fully compliant). The dangers of pragmatism over completeness!

In terms of answering your questions:

1. You could probably use device/drawing1 - this is normally solid green. Also pin drawing (solid red).
2. You could use dbCreateXformPCell() which will create you a pcell with a mag parameter to emulate the old CDB mag. Of course, you'll still have a pixellated image - but may be more convenient? For another customer a few years ago I ended up hand converting their SVG logo into a pcell, using a bunch of utility functions to create cubic bezier curves. That allowed me to have a scalable vector logo pcell. I'll post the cubic bezier code below - not sure this really helps you here though!

/* abCubicBezier.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Nov 29, 2006 
Modified   
By         

Code to generate cubic bezier curves

Examples:

abPlotBezier(600:500 900:500 600:350 900:650 "y0")
abPlotBezier(600:200 900:200 675:100 975:100 "y0")
abPlotBezier(100:200 400:200 100:100 400:100 "y0")
abPlotBezier(100:500 400:500 25:400 475:400 "y0")

***************************************************

SCCS Info: @(#) abCubicBezier.il 11/29/06.17:23:32 1.1

*/

/****************************************************************
*                                                               *
*                 abPointOnCubicBezier (cp tp)                  *
*                                                               *
*                cp is a 4 element array where:                 *
*    cp[0] is the starting point, or P0 in the above diagram    *
* cp[1] is the first control point, or P1 in the above diagram  *
* cp[2] is the second control point, or P2 in the above diagram *
*      cp[3] is the end point, or P3 in the above diagram       *
*            tp is the parameter value, 0 <= tp <= 1            *
*                                                               *
****************************************************************/

defun(abPointOnCubicBezier (cp tp)
let((ax bx cx ay by cy tSquared tCubed)

    ;--------------------------------------------------------------------
    ; calculate the polynomial coefficients
    ;--------------------------------------------------------------------
    cx = 3.0 * (xCoord(cp[1]) - xCoord(cp[0]))
    bx = 3.0 * (xCoord(cp[2]) - xCoord(cp[1])) - cx
    ax = xCoord(cp[3]) - xCoord(cp[0]) - cx - bx
        
    cy = 3.0 * (yCoord(cp[1]) - yCoord(cp[0]))
    by = 3.0 * (yCoord(cp[2]) - yCoord(cp[1])) - cy
    ay = yCoord(cp[3]) - yCoord(cp[0]) - cy - by
        
    ;--------------------------------------------------------------------
    ; calculate the curve point at parameter value tp
    ;--------------------------------------------------------------------
    tSquared = tp * tp
    tCubed = tSquared * tp
        
    ;--------------------------------------------------------------------
    ; The result
    ;--------------------------------------------------------------------
    (ax * tCubed) + (bx * tSquared) + (cx * tp) + xCoord(cp[0]):
    (ay * tCubed) + (by * tSquared) + (cy * tp) + yCoord(cp[0])

    ) 
) ; defun

/***************************************************************
*                                                              *
*             abComputeBezier (cp numberOfPoints)              *
*                                                              *
*                   returns a list of points                   *
*            generated from the control points cp.             *
*                                                              *
***************************************************************/

defun(abComputeBezier (cp numberOfPoints) 
let((dt result)

    dt = 1.0 / ( numberOfPoints - 1 )

    for(i 0 sub1(numberOfPoints)
        result=tconc(result abPointOnCubicBezier(cp i*dt))
    ) ; for
    car(result)
))

/***************************************************************
*                                                              *
*          abPlotBezier (from to p1 p2 layerName @key          *
*       (numPoints 200) (cellView (geGetEditCellView)))        *
*                                                              *
*     Example function to plot a line from the calculated      *
*                           points.                            *
*                                                              *
***************************************************************/

defun(abPlotBezier (from to p1 p2 layerName @key 
    (numPoints 200) (cellView (geGetEditCellView)))
let((cp pointList)

    declare(cp[4])

    ;--------------------------------------------------------------------
    ; Put coefficients in an array
    ;--------------------------------------------------------------------
    cp[0]=from
    cp[3]=to
    cp[1]=p1
    cp[2]=p2

    pointList=abComputeBezier(cp numPoints)
    dbCreateLine(cellView layerName pointList)
))

Regards,

Andrew.

Hi Dan,

Thanks for the feedback. Unfortunately I didn't spend a lot of time trying to make the parser really robust (in other words I used empirical examples rather than trying to find the XPM specification and ensure that I was fully compliant). The dangers of pragmatism over completeness!

In terms of answering your questions:

1. You could probably use device/drawing1 - this is normally solid green. Also pin drawing (solid red).
2. You could use dbCreateXformPCell() which will create you a pcell with a mag parameter to emulate the old CDB mag. Of course, you'll still have a pixellated image - but may be more convenient? For another customer a few years ago I ended up hand converting their SVG logo into a pcell, using a bunch of utility functions to create cubic bezier curves. That allowed me to have a scalable vector logo pcell. I'll post the cubic bezier code below - not sure this really helps you here though!

/* abCubicBezier.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Nov 29, 2006 
Modified   
By         

Code to generate cubic bezier curves

Examples:

abPlotBezier(600:500 900:500 600:350 900:650 "y0")
abPlotBezier(600:200 900:200 675:100 975:100 "y0")
abPlotBezier(100:200 400:200 100:100 400:100 "y0")
abPlotBezier(100:500 400:500 25:400 475:400 "y0")

***************************************************

SCCS Info: @(#) abCubicBezier.il 11/29/06.17:23:32 1.1

*/

/****************************************************************
*                                                               *
*                 abPointOnCubicBezier (cp tp)                  *
*                                                               *
*                cp is a 4 element array where:                 *
*    cp[0] is the starting point, or P0 in the above diagram    *
* cp[1] is the first control point, or P1 in the above diagram  *
* cp[2] is the second control point, or P2 in the above diagram *
*      cp[3] is the end point, or P3 in the above diagram       *
*            tp is the parameter value, 0 <= tp <= 1            *
*                                                               *
****************************************************************/

defun(abPointOnCubicBezier (cp tp)
let((ax bx cx ay by cy tSquared tCubed)

    ;--------------------------------------------------------------------
    ; calculate the polynomial coefficients
    ;--------------------------------------------------------------------
    cx = 3.0 * (xCoord(cp[1]) - xCoord(cp[0]))
    bx = 3.0 * (xCoord(cp[2]) - xCoord(cp[1])) - cx
    ax = xCoord(cp[3]) - xCoord(cp[0]) - cx - bx
        
    cy = 3.0 * (yCoord(cp[1]) - yCoord(cp[0]))
    by = 3.0 * (yCoord(cp[2]) - yCoord(cp[1])) - cy
    ay = yCoord(cp[3]) - yCoord(cp[0]) - cy - by
        
    ;--------------------------------------------------------------------
    ; calculate the curve point at parameter value tp
    ;--------------------------------------------------------------------
    tSquared = tp * tp
    tCubed = tSquared * tp
        
    ;--------------------------------------------------------------------
    ; The result
    ;--------------------------------------------------------------------
    (ax * tCubed) + (bx * tSquared) + (cx * tp) + xCoord(cp[0]):
    (ay * tCubed) + (by * tSquared) + (cy * tp) + yCoord(cp[0])

    ) 
) ; defun

/***************************************************************
*                                                              *
*             abComputeBezier (cp numberOfPoints)              *
*                                                              *
*                   returns a list of points                   *
*            generated from the control points cp.             *
*                                                              *
***************************************************************/

defun(abComputeBezier (cp numberOfPoints) 
let((dt result)

    dt = 1.0 / ( numberOfPoints - 1 )

    for(i 0 sub1(numberOfPoints)
        result=tconc(result abPointOnCubicBezier(cp i*dt))
    ) ; for
    car(result)
))

/***************************************************************
*                                                              *
*          abPlotBezier (from to p1 p2 layerName @key          *
*       (numPoints 200) (cellView (geGetEditCellView)))        *
*                                                              *
*     Example function to plot a line from the calculated      *
*                           points.                            *
*                                                              *
***************************************************************/

defun(abPlotBezier (from to p1 p2 layerName @key 
    (numPoints 200) (cellView (geGetEditCellView)))
let((cp pointList)

    declare(cp[4])

    ;--------------------------------------------------------------------
    ; Put coefficients in an array
    ;--------------------------------------------------------------------
    cp[0]=from
    cp[3]=to
    cp[1]=p1
    cp[2]=p2

    pointList=abComputeBezier(cp numPoints)
    dbCreateLine(cellView layerName pointList)
))

Regards,

Andrew.