Coordinate Systems

Display Image Client Coords

通过cc2Xform可以把图像坐标系和用户坐标系进行变换，使其不重合。

ccPNG png;
//png.init(cfSamplePrependVisionRootPath(cmT("sample\\cvl\\pngfile.png")));
png.init(cmT("C:\\Users\\CNMIZHU7\\Pictures\\test.png"));

ccDisplayConsole console(ccIPair(600, 600), cmT("PNG Image"));

ccPelBuffer<ccPackedRGB32Pel> imageRGB32Pel;
png.pelBuffer(imageRGB32Pel);


cc2Xform xform(cc2Vect(0, 0), ccRadian(0), ccRadian(0), 10, 10);
imageRGB32Pel.imageFromClientXform(xform);

console.image(imageRGB32Pel);
   
ccUITablet tablet1;
ccPoint where(8, 8);
tablet1.drawPointIcon(where, ccColor::red);
tablet1.draw(cmT("Display Point (8,8)"), where, ccColor::blue, ccColor::yellow, ccUIFormat());
console.drawSketch(tablet1.sketch(), ccDisplay::eDisplayCoords);

ccUITablet tablet2;
tablet2.drawPointIcon(where, ccColor::red);
tablet2.draw(cmT("Client Point (8,8)"), where, ccColor::blue, ccColor::yellow, ccUIFormat());
console.drawSketch(tablet2.sketch(), ccDisplay::eClientCoords);

ccUITablet tablet3;
tablet3.drawPointIcon(where, ccColor::red);
tablet3.draw(cmT("Image Point (8,8)"), where, ccColor::blue, ccColor::yellow, ccUIFormat());
console.drawSketch(tablet3.sketch(), ccDisplay::eImageCoords);

Client Coordinate System

Native units (inches or centimeters instead of pixels) are defined by the client coordinate system. The client coordinate system uses a ransformation object to map between client coordinates and image coordinates.