drawing

/* 程序名：drawing..c

功能：展示OpenCV的图像绘制功能

*/

#include "cv.h"

#include "highgui.h"

#include <stdlib.h>

#include <stdio.h>

#define NUMBER 100

#define DELAY 5

char wndname[] = "Drawing Demo";

CvScalar random_color(CvRNG* rng)

{

    int icolor = cvRandInt(rng);

    return CV_RGB(icolor&255, (icolor>>8)&255, (icolor>>16)&255);

}

int main( int argc, char** argv )

{

    int line_type = CV_AA; // change it to 8 to see non-antialiased graphics

    int i;

    CvPoint pt1,pt2;

    double angle;

    CvSize sz;

    CvPoint  ptt[6];

    CvPoint* pt[2];

    int  arr[2];

    CvFont font;

    CvRNG rng;

    int width = 1000, height = 700;

    int width3 = width*3, height3 = height*3;

    CvSize text_size;

    int ymin = 0;

    // Load the source image

    IplImage* image = cvCreateImage( cvSize(width,height), 8, 3 );

    IplImage* image2;

    // Create a window

    cvNamedWindow(wndname, 1 );

    cvZero( image );

    cvShowImage(wndname,image);

    rng = cvRNG((unsigned)-1);

    pt[0] = &(ptt[0]);

    pt[1] = &(ptt[3]);

    arr[0] = 3;

    arr[1] = 3;

    for (i = 0; i< NUMBER; i++)

    {

        pt1.x=cvRandInt(&rng) % width3 - width;

        pt1.y=cvRandInt(&rng) % height3 - height;

        pt2.x=cvRandInt(&rng) % width3 - width;

        pt2.y=cvRandInt(&rng) % height3 - height;

        cvLine( image, pt1, pt2, random_color(&rng), cvRandInt(&rng)%10, line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 0; i< NUMBER; i++)

    {

        pt1.x=cvRandInt(&rng) % width3 - width;

        pt1.y=cvRandInt(&rng) % height3 - height;

        pt2.x=cvRandInt(&rng) % width3 - width;

        pt2.y=cvRandInt(&rng) % height3 - height;

        cvRectangle( image,pt1, pt2, random_color(&rng), cvRandInt(&rng)%10-1, line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 0; i< NUMBER; i++)

    {

        pt1.x=cvRandInt(&rng) % width3 - width;

        pt1.y=cvRandInt(&rng) % height3 - height;

        sz.width =cvRandInt(&rng)%200;

        sz.height=cvRandInt(&rng)%200;

        angle = (cvRandInt(&rng)%1000)*0.180;

        cvEllipse( image, pt1, sz, angle, angle - 100, angle + 200,

                   random_color(&rng), cvRandInt(&rng)%10-1, line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 0; i< NUMBER; i++)

    {

        pt[0][0].x=cvRandInt(&rng) % width3 - width;

        pt[0][0].y=cvRandInt(&rng) % height3 - height;

        pt[0][1].x=cvRandInt(&rng) % width3 - width;

        pt[0][1].y=cvRandInt(&rng) % height3 - height;

        pt[0][2].x=cvRandInt(&rng) % width3 - width;

        pt[0][2].y=cvRandInt(&rng) % height3 - height;

        pt[1][0].x=cvRandInt(&rng) % width3 - width;

        pt[1][0].y=cvRandInt(&rng) % height3 - height;

        pt[1][1].x=cvRandInt(&rng) % width3 - width;

        pt[1][1].y=cvRandInt(&rng) % height3 - height;

        pt[1][2].x=cvRandInt(&rng) % width3 - width;

        pt[1][2].y=cvRandInt(&rng) % height3 - height;

        cvPolyLine( image, pt, arr, 2, 1, random_color(&rng), cvRandInt(&rng)%10, line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 0; i< NUMBER; i++)

    {

        pt[0][0].x=cvRandInt(&rng) % width3 - width;

        pt[0][0].y=cvRandInt(&rng) % height3 - height;

        pt[0][1].x=cvRandInt(&rng) % width3 - width;

        pt[0][1].y=cvRandInt(&rng) % height3 - height;

        pt[0][2].x=cvRandInt(&rng) % width3 - width;

        pt[0][2].y=cvRandInt(&rng) % height3 - height;

        pt[1][0].x=cvRandInt(&rng) % width3 - width;

        pt[1][0].y=cvRandInt(&rng) % height3 - height;

        pt[1][1].x=cvRandInt(&rng) % width3 - width;

        pt[1][1].y=cvRandInt(&rng) % height3 - height;

        pt[1][2].x=cvRandInt(&rng) % width3 - width;

        pt[1][2].y=cvRandInt(&rng) % height3 - height;

        cvFillPoly( image, pt, arr, 2, random_color(&rng), line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 0; i< NUMBER; i++)

    {

        pt1.x=cvRandInt(&rng) % width3 - width;

        pt1.y=cvRandInt(&rng) % height3 - height;

        cvCircle( image, pt1, cvRandInt(&rng)%300, random_color(&rng),

                  cvRandInt(&rng)%10-1, line_type, 0 );

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    for (i = 1; i< NUMBER; i++)

    {

        pt1.x=cvRandInt(&rng) % width3 - width;

        pt1.y=cvRandInt(&rng) % height3 - height;

        cvInitFont( &font, cvRandInt(&rng) % 8,

(cvRandInt(&rng)%100)*0.05+0.1,

 (cvRandInt(&rng)%100)*0.05+0.1,

(cvRandInt(&rng)%5)*0.1, cvRound(cvRandInt(&rng)%10),

line_type );

        cvPutText( image, "Testing text rendering!", pt1, &font, random_color(&rng));

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    cvInitFont( &font, CV_FONT_HERSHEY_COMPLEX, 3, 3, 0.0, 5, line_type );

    cvGetTextSize( "OpenCV forever!", &font, &text_size, &ymin );

    pt1.x = (width - text_size.width)/2;

    pt1.y = (height + text_size.height)/2;

    image2 = cvCloneImage(image);

    for( i = 0; i < 255; i++ )

    {

        cvSubS( image2, cvScalarAll(i), image, 0 );

        cvPutText( image, "OpenCV forever!", pt1, &font, CV_RGB(255,i,i));

        cvShowImage(wndname,image);

        cvWaitKey(DELAY);

    }

    // Wait for a key stroke; the same function arranges events processing

    cvWaitKey(0);

    cvReleaseImage(&image);

    cvReleaseImage(&image2);

    cvDestroyWindow(wndname);

return 0;

}