Inspiring

Question

transform_world problem

Forum|Forum|12 years ago
August 4, 2013
1 reply
1637 views

Hi

I'm trying to use transform_world to take on world, scale it and translate it and copy it into the output

It seems that just scaling it and copying it works, and just translating it and copying it works, but trying do do both results in some really odd clipping/masking problem. The example code below should scale by a factor of 100 and then translate by 2 pixels in the x direction (unless I've messed up my matrix multiplication, but I don't think I have). As far as I can tell, both the scaling and the translation are working as they should, but in addition the copied image is cropped on the left. The attached images show the results if I use values of xtranslate of 2 and 2.5 pixels. In this case the world that is being copied from contains white noise, and that copied to is just a purple background. The crop amount seems to be (1-xtranslate)*scale, so is 100 for xtranslate of 2 and 150 for xtranslate of 2.5.

Does anyone have any idea of what is going on?

PF_CompositeMode mode;

mode.opacity=255;

mode.opacitySu=32768;

mode.rgb_only=false;

mode.xfer=PF_Xfer_IN_FRONT;

PF_FloatMatrix mat;

double ratio=(double)in_data->downsample_x.num/(double)in_data->downsample_x.den;

double scale=100.0*ratio;

double xtranslate=2.5*ratio;

mat.mat[0][0]=scale;

mat.mat[0][1]=0.0;

mat.mat[0][2]=0.0;

mat.mat[1][0]=0.0;

mat.mat[1][1]=scale;

mat.mat[1][2]=0.0;

mat.mat[2][0]=xtranslate*scale;

mat.mat[2][1]=0.0;

mat.mat[2][2]=scale;

PF_Rect dest;

dest.bottom=in_data->height;

dest.left=0;

dest.right=in_data->width;

dest.top=0;

int quality=PF_Quality_LO;

err=suites.WorldTransformSuite1()->transform_world(NULL,quality,0,PF_Field_FRAME,&ni.pixelworld,&mode,NULL,&mat,1,true,&dest,output);

links to examples

http://www.flickr.com/photos/78717189@N00/9437292828/

http://www.flickr.com/photos/78717189@N00/9434514543/

SDK

This topic has been closed for replies.

S

shachar carmi

Community Expert

hmmmm...

well, first, i'd go with PF_Quality_HI. no doubt some of the problems in the images you psted come from that.

secondly, i think you should concatenate your scale and translate matrices. (take a look at the CCU sample)

take a look at this thread:

http://forums.adobe.com/message/1967376#1967376

mybe somthing there will ring a bell.

P

philrosenberg2013Author

Inspiring

Thanks for the response. I tried using PF_Quality_HI, but it doesn't help. The clipping is still there and it also doesn't give the enlargening I want in this case as it tries to smooth between the pixels of the white noise.

I looked in CCU.cpp and there doesn't appear to be any mention of PF_FloatMatrix at all. am I looking in the right place?

I had seen that previous thread - and it was very informative at enabing me to get transform_world working at all as the documentation is shocking. However, I couldn't see anything to help me in this case.

Phil

S

shachar carmi

Community Expert

oh my... it seems to not exist in the ccu sample in CS5 and up.

here's the code from the CS3 SDK:

static void

CCU_ConcatMatrix (

const PF_FloatMatrix *src_matrixP,

PF_FloatMatrix *dst_matrixP)

{

PF_FloatMatrix tmp;

PF_FpLong tempF = 0;

for (register A_long iL = 0; iL < 3; iL++) {

for (register A_long jL = 0; jL < 3; jL++) {

tempF = dst_matrixP->mat[iL][0] * src_matrixP->mat[0][jL] +

dst_matrixP->mat[iL][1] * src_matrixP->mat[1][jL] +

dst_matrixP->mat[iL][2] * src_matrixP->mat[2][jL];

tmp.mat[iL][jL] = tempF;

}

*dst_matrixP = tmp;

}

void

CCU_SetIdentityMatrix (

PF_FloatMatrix *matrixP)

{

matrixP->mat[0][0] =

matrixP->mat[1][1] =

matrixP->mat[2][2] = 1;

matrixP->mat[0][1] =

matrixP->mat[0][2] =

matrixP->mat[1][0] =

matrixP->mat[1][2] =

matrixP->mat[2][0] =

matrixP->mat[2][1] = 0;

}

PF_Err

CCU_ScaleMatrix (

PF_FloatMatrix *mP,

PF_FpLong scaleX,

PF_FpLong scaleY,

PF_FpLong aboutX,

PF_FpLong aboutY )

{

PF_Err err = PF_Err_NONE;

PF_FloatMatrix scale;

if (scaleX != 1.0 || scaleY != 1.0)

{

scale.mat[0][0] = scaleX;

scale.mat[0][1] = 0;

scale.mat[0][2] = 0;

scale.mat[1][0] = 0;

scale.mat[1][1] = scaleY;

scale.mat[1][2] = 0;

scale.mat[2][0] = (1.0 - scaleX) * (aboutX);

scale.mat[2][1] = (1.0 - scaleY) * (aboutY);

scale.mat[2][2] = 1;

CCU_ConcatMatrix(&scale, mP);

}

return err;

}

PF_Err

CCU_RotateMatrixPlus (

PF_FloatMatrix *matrixP,

PF_InData *in_data,

PF_FpLong degreesF,

PF_FpLong aboutXF,

PF_FpLong aboutYF)

{

AEGP_SuiteHandler suites(in_data->pica_basicP);

PF_Err err = PF_Err_NONE;

PF_FloatMatrix rotate;

PF_FpLong radiansF = 0,

sF = 0,

cF = 0;

if (degreesF){

radiansF = PF_RAD_PER_DEGREE * degreesF;

sF = suites.ANSICallbacksSuite1()->sin(radiansF);

cF = suites.ANSICallbacksSuite1()->cos(radiansF);

rotate.mat[0][0] = cF;

rotate.mat[0][1] = sF;

rotate.mat[0][2] = 0;

rotate.mat[1][0] = -sF;

rotate.mat[1][1] = cF;

rotate.mat[1][2] = 0;

rotate.mat[2][0] = (aboutXF * (1.0 - cF) + aboutYF * sF);

rotate.mat[2][1] = (aboutYF * (1.0 - cF) - aboutXF * sF);

rotate.mat[2][2] = 1;

CCU_ConcatMatrix(&rotate, matrixP);

}

return err;

}

void

CCU_TransformFixPoints (

const PF_FloatMatrix *matrixP,

A_long countL,

PF_FixedPoint *pointsFiAP)

{

PF_Fixed iL = 0;

PF_FixedPoint currentFiPt = {0,0};

PF_FpLong dF = 0;

for (iL = 0; iL < countL; iL++)

{

currentFiPt = pointsFiAP[iL];

dF = currentFiPt.x * matrixP->mat[0][0] +

currentFiPt.y * matrixP->mat[1][0] +

65536.0 *

matrixP->mat[2][0];

pointsFiAP[iL].x = static_cast<PF_Fixed>(ROUND_DBL2LONG(dF));

dF = currentFiPt.x * matrixP->mat[0][1] +

currentFiPt.y *

matrixP->mat[1][1] +

65536.0 *

matrixP->mat[2][1];

pointsFiAP[iL].y = static_cast<PF_Fixed>(ROUND_DBL2LONG(dF));

}

static void

TransformOval(

PF_InData *in_data,

PF_EventExtra *extra,

PF_FixedRect *fx_frame,

PF_Point *transformedPtP)

{

AEGP_SuiteHandler suites(in_data->pica_basicP);

PF_FixedPoint centerFiPt = {0,0};

PF_FloatMatrix mat;

PF_FpLong angleF = 0,

dxF = 0,

dyF = 0,

x_radF = 0,

y_radF = 0;

PF_FixedPoint copy_pts[OVAL_PTS];

centerFiPt.x = (fx_frame->left + fx_frame->right) / 2;;

centerFiPt.y = (fx_frame->top + fx_frame->bottom) / 2;

dxF = FIX_2_FLOAT(fx_frame->right - fx_frame->left);

dyF = 0;

angleF = suites.ANSICallbacksSuite1()->atan2(dyF, dxF);

angleF /= PF_RAD_PER_DEGREE;

x_radF = suites.ANSICallbacksSuite1()->sqrt(dxF * dxF + dyF * dyF) / 2.0;

dxF = 0;

dyF = FIX_2_FLOAT(fx_frame->bottom - fx_frame->top);

y_radF = suites.ANSICallbacksSuite1()->sqrt(dxF * dxF + dyF * dyF) / 2.0;

CCU_SetIdentityMatrix(&mat);

CCU_ScaleMatrix(&mat,

x_radF,

y_radF,

0,

0);

CCU_RotateMatrixPlus( &mat,

in_data,

angleF,

0,

0);

for (A_short iS = 0; iS < OVAL_PTS; iS++) {

copy_pts[iS].x = std_oval[iS].x;

copy_pts[iS].y = std_oval[iS].y;

}

CCU_TransformFixPoints( &mat,

OVAL_PTS,

copy_pts);

for (A_short jS = 0; jS < OVAL_PTS; jS++) {

copy_pts[jS].x += centerFiPt.x;

copy_pts[jS].y += centerFiPt.y;

}

for (A_short kS = 0; kS < OVAL_PTS; kS++) {

extra->cbs.layer_to_comp( extra->cbs.refcon,

extra->contextH,

in_data->current_time,

in_data->time_scale,

(PF_FixedPoint *)&(copy_pts[kS]));

extra->cbs.source_to_frame( extra->cbs.refcon,

extra->contextH,

(PF_FixedPoint*)&(copy_pts[kS]));

}

for (A_short qS = 0; qS < OVAL_PTS; qS++) {

transformedPtP[qS].h = FIX2INT_ROUND(copy_pts[qS].x);

transformedPtP[qS].v = FIX2INT_ROUND(copy_pts[qS].y);

}

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