I have a QGraphicsScene. In that scene I have a rects and I want to set different colors in that rects.
My code is
QGraphicsScene* scene;
scene = new QGraphicsScene(this);
QGraphicsView* view;
view = new QGraphicsView(this);
view->setGeometry(x, y, mapColumns * min_height_size, mapRows * min_width_size);
view->setScene(scene);
for(int i=0; i<mapRows; ++i){
for(int j=0; j<mapColumns; ++j){
if (j == 0) {
y = 20;
}
if(map.getCell(i,j).getTerrain() == Cell::forest) {
scene->addRect(x,y,min_height_size,min_width_size);
scene->setPalette(Qt::green); //but it didn't work
y += min_width_size;
} else if(map.getCell(i,j).getTerrain() == Cell::mountain){
scene->addRect(x,y,min_height_size,min_width_size);
scene->setPalette(Qt::blue); //but it didn't work
y += min_width_size;
} else if(map.getCell(i,j).getTerrain() == Cell::plain) {
scene->addRect(x,y,min_height_size,min_width_size);
scene->setPalette(Qt::yellow); //but it didn't work
y += min_width_size;
}
view->setDragMode(QGraphicsView::ScrollHandDrag);
}
x += min_height_size;
}
}
You can use the setBrush() function to set the color.
QGraphicsRectItem *rect_item1 = scene->addRect(100, 100, 50, 50);
rect_item1->setBrush(Qt::yellow);
QGraphicsRectItem *rect_item2 = scene->addRect(200, 250, 50, 50);
rect_item2->setBrush(QColor(100,50,200));
Related
I want to draw millimeter paper into a pdf, but when I measure the printed document I'm a bit off (drawn cm < 1 cm). I'm using the size of an A4 Paper (210 * 297) and the pageWidth and pageHeight to calculate the pixel per mm (used the average of both hoping this would work). I also tried different option when printing the document (with & without margin etc.), but this didn't work as well.
public class TestPrint extends Application {
protected static final float DINA4_IN_MM_WIDTH = 210;
protected static final float DINA4_IN_MM_HEIGHT = 297;
protected static final int LEFTSIDE = 35;
protected static final int TEXT_FONT_SIZE = 11;
protected static final int TOP_MARGIN = 60;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
File file = new File("test.pdf");
double windowWidth = 600;
double windowHeight = 1000;
float x = LEFTSIDE;
PDFont font = PDType1Font.TIMES_ROMAN;
PDPage page = new PDPage(PDRectangle.A4);
PDRectangle pageSize = page.getMediaBox();
PDDocument mainDocument = new PDDocument();
mainDocument.addPage(page);
float stringHeight = font.getFontDescriptor().getFontBoundingBox().getHeight() * TEXT_FONT_SIZE;
float y = pageSize.getHeight() - stringHeight / 1000f - TOP_MARGIN;
float pixelPerMM = (pageSize.getWidth() / DINA4_IN_MM_WIDTH + pageSize.getHeight() / DINA4_IN_MM_HEIGHT) / 2;
float displayW = 520;
float displayH = 300;
try {
PDPageContentStream contents = new PDPageContentStream(mainDocument, page, AppendMode.APPEND, true);
drawBackgroundRaster(contents, x, y, displayW, displayH, pixelPerMM);
contents.close();
mainDocument.save(file);
ImageView imgView = getImageViewFromDocument(mainDocument, windowHeight);
VBox vBox = new VBox(imgView);
Scene scene = new Scene(vBox, windowWidth, windowHeight);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
// draw millimeter paper with dots, two boxes shall be 1cm
private void drawBackgroundRaster(PDPageContentStream contents, float x, float y, float displayW, float displayH,
float pixelPerMM) throws IOException {
// rasterColor = grey
Color rasterColor = new Color(175, 175, 175);
contents.setStrokingColor(rasterColor);
float dotSize = 0.5f;
// draw vertical lines
for (int i = 0; i <= displayW; i++) {
float xPos = x + i * pixelPerMM;
if (xPos > displayW + x) {
break;
}
contents.moveTo(xPos, y);
if (i % 5 == 0) {
contents.setLineDashPattern(new float[] {}, 0);
contents.lineTo(xPos, y - displayH);
}
contents.stroke();
}
// draw dots and horizontal lines
for (int i = 0; i <= displayH; i++) {
float yPos = y - i * pixelPerMM;
if (yPos < y - displayH) {
break;
}
contents.moveTo(x, yPos);
if (i % 5 == 0) {
contents.setLineDashPattern(new float[] {}, 0);
contents.lineTo(x + displayW, yPos);
} else {
contents.setLineDashPattern(new float[] { dotSize, pixelPerMM - dotSize }, dotSize / 2);
contents.lineTo(x + displayW, yPos);
}
contents.stroke();
}
contents.setLineDashPattern(new float[] {}, 0);
contents.moveTo(x, y);
contents.lineTo(x + displayW, y);
contents.lineTo(x + displayW, y - displayH);
contents.lineTo(x, y - displayH);
contents.lineTo(x, y);
contents.stroke();
}
private ImageView getImageViewFromDocument(PDDocument mainDocument, double windowHeight) throws IOException {
PDFRenderer pdfRenderer = new PDFRenderer(mainDocument);
BufferedImage bim = pdfRenderer.renderImageWithDPI(0, 150, ImageType.RGB);
Image image = SwingFXUtils.toFXImage(bim, null);
ImageView imageView = new ImageView(image);
double scaleFactor = windowHeight / imageView.getImage().getHeight();
double zoomFactor = scaleFactor * 2d * 2.55d / 3;
double width = imageView.getImage().getWidth() * zoomFactor;
double height = imageView.getImage().getHeight() * zoomFactor;
imageView.setFitWidth(width);
imageView.setFitHeight(height);
return imageView;
}
}
I am trying to make a little algorithm that colors a point a certain color based on what side of a line the point is on. This is what i have at the moment. The code doesnt give any errors, but the colors also arent correct for the dots.. Could someone point out to me what i am doing wrong?
See the code:
PVector[] points;
void setup() {
size(500, 500);
points = new PVector[10];
for (int i = 0; i < points.length; i++) {
points[i] = new PVector(random(0, width), random(0, height));
}
ExtremesLine(points);
}
void ExtremesLine(PVector[] pts) {
float maxx = 0, minx = width+1;
PVector min = new PVector(), max = new PVector();
ArrayList<PVector> groupA = new ArrayList<PVector>(), groupB = new ArrayList<PVector>();
for (int i = 0; i < pts.length; i++) {
if (pts[i].x > maxx) {
maxx = pts[i].x;
max = pts[i];
}
if (pts[i].x < minx) {
minx = pts[i].x;
min = pts[i];
}
}
PVector divisionLine = new PVector();
PVector.sub(max, min, divisionLine);
PVector normal = new PVector(-divisionLine.y, divisionLine.x).normalize();
for (int i = 0; i < pts.length; i++) {
float s = PVector.dot(normal, pts[i].copy().normalize());
if ( s < 0) groupA.add(pts[i]);
else if ( s > 0) groupB.add(pts[i]);
}
fill(0);
line(min.x, min.y, max.x, max.y);
for (int i = 0; i < groupA.size(); i++) {
fill(255, 0, 0);
ellipse(groupA.get(i).x, groupA.get(i).y, 10, 10);
}
for (int i = 0; i < groupB.size(); i++) {
fill(0, 0, 255);
ellipse(groupB.get(i).x, groupB.get(i).y, 10, 10);
}
}
As you can see from the images below sometimes it works but 90% of the time it doesnt. First image is the correct result, second image is the incorrect result
If there is anything unclear pls let me know so i can clarify!
You need to dot with vectors from min:
replace
float s = PVector.dot(normal, pts[i].copy().normalize());
by
float s = PVector.dot(normal, pts[i].copy().sub(min).normalize());
and it will work as expected:
Tangentially, since min and max are Processing built-ins, are you sure that you want to use them as variable names?
I'm having a dilemma with this code and have no clue what to do. I'm pretty new to processing. This is a project from this link...
http://blog.makezine.com/2012/08/10/build-a-touchless-3d-tracking-interface-with-everyday-materials/
any help is massively appreciated... Thanks in advance
import processing.serial.*;
import processing.opengl.*;
Serial serial;
int serialPort = 1;
int sen = 3; // sensors
int div = 3; // board sub divisions
Normalize n[] = new Normalize[sen];
MomentumAverage cama[] = new MomentumAverage[sen];
MomentumAverage axyz[] = new MomentumAverage[sen];
float[] nxyz = new float[sen];
int[] ixyz = new int[sen];
float w = 256; // board size
boolean[] flip = {
false, true, false};
int player = 0;
boolean moves[][][][];
PFont font;
void setup() {
size(800, 600, P3D);
frameRate(25);
font = loadFont("TrebuchetMS-Italic-20.vlw");
textFont(font);
textMode(SCREEN);
println(Serial.list());
serial = new Serial(this, Serial.list()[serialPort], 115200);
for(int i = 0; i < sen; i++) {
n[i] = new Normalize();
cama[i] = new MomentumAverage(.01);
axyz[i] = new MomentumAverage(.15);
}
reset();
}
void draw() {
updateSerial();
drawBoard();
}
void updateSerial() {
String cur = serial.readStringUntil('\n');
if(cur != null) {
String[] parts = split(cur, " ");
if(parts.length == sensors) {
float[] xyz = new float[sen];
for(int i = 0; i < sen; i++)
xyz[i] = float(parts[i]);
if(mousePressed && mouseButton == LEFT)
for(int i = 0; i < sen; i++)
n[i].note(xyz[i]);
nxyz = new float[sen];
for(int i = 0; i < sen; i++) {
float raw = n[i].choose(xyz[i]);
nxyz[i] = flip[i] ? 1 - raw : raw;
cama[i].note(nxyz[i]);
axyz[i].note(nxyz[i]);
ixyz[i] = getPosition(axyz[i].avg);
}
}
}
}
float cutoff = .2;
int getPosition(float x) {
if(div == 3) {
if(x < cutoff)
return 0;
if(x < 1 - cutoff)
return 1;
else
return 2;
}
else {
return x == 1 ? div - 1 : (int) x * div;
}
}
void drawBoard() {
background(255);
float h = w / 2;
camera(
h + (cama[0].avg - cama[2].avg) * h,
h + (cama[1].avg - 1) * height / 2,
w * 2,
h, h, h,
0, 1, 0);
pushMatrix();
noStroke();
fill(0, 40);
translate(w/2, w/2, w/2);
rotateY(-HALF_PI/2);
box(w);
popMatrix();
float sw = w / div;
translate(h, sw / 2, 0);
rotateY(-HALF_PI/2);
pushMatrix();
float sd = sw * (div - 1);
translate(
axyz[0].avg * sd,
axyz[1].avg * sd,
axyz[2].avg * sd);
fill(255, 160, 0);
noStroke();
sphere(18);
popMatrix();
for(int z = 0; z < div; z++) {
for(int y = 0; y < div; y++) {
for(int x = 0; x < div; x++) {
pushMatrix();
translate(x * sw, y * sw, z * sw);
noStroke();
if(moves[0][x][y][z])
fill(255, 0, 0, 200);
else if(moves[1][x][y][z])
fill(0, 0, 255, 200);
else if(
x == ixyz[0] &&
y == ixyz[1] &&
z == ixyz[2])
if(player == 0)
fill(255, 0, 0, 200);
else
fill(0, 0, 255, 200);
else
fill(0, 100);
box(sw / 3);
popMatrix();
}
}
}
fill(0);
if(mousePressed && mouseButton == LEFT)
msg("defining boundaries");
}
void keyPressed() {
if(key == TAB) {
moves[player][ixyz[0]][ixyz[1]][ixyz[2]] = true;
player = player == 0 ? 1 : 0;
}
}
void mousePressed() {
if(mouseButton == RIGHT)
reset();
}
void reset() {
moves = new boolean[2][div][div][div];
for(int i = 0; i < sen; i++) {
n[i].reset();
cama[i].reset();
axyz[i].reset();
}
}
void msg(String msg) {
text(msg, 10, height - 10);
}
You are missing a class, in fact, more than one. Go back to the github and download, or copy and paste, all three codes, placing each one in a new tab named same name of the class (well this is not required, but is a good practice). The TicTacToe3D.pde is the main code. To make a new tab choose "new tab" from the arrow menu in Processing IDE (just below the standard button at the right). The code should run. WIll need an Arduino though to really get it working.
in page cap.aspx
==========================================================================
string code = GetRandomText();
Bitmap bitmap = new Bitmap(160,50,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bitmap);
Pen pen = new Pen(Color.LavenderBlush);
Rectangle rect = new Rectangle(0,0,160,50);
SolidBrush b = new SolidBrush(Color.LightPink);
SolidBrush blue = new SolidBrush(Color.White);
int counter = 0;
g.DrawRectangle(pen, rect);
g.FillRectangle(b, rect);
for (int i = 0; i < code.Length; i++)
{
g.DrawString(code[i].ToString(), new Font("Tahoma", 10 + rand.Next(14, 18)), blue, new PointF(10 + counter, 10));
counter += 20;
}
DrawRandomLines(g);
bitmap.Save(Response.OutputStream,ImageFormat.Gif);
g.Dispose();
b.Dispose();
blue.Dispose();
bitmap.Dispose();
===================================================================================
<div id="DIVdialog" style="display:none">
<img src="cap.aspx"/>
</div>
===================================================================================
$("#DIVdialog").dialog();
==================================================================================
show dialog but does not show image? address cap.aspx is correct!
how get cap.aspx by $.ajax and datatype:image?
I think that the key here is to add the ContentType and the BufferOutput
context.Response.ContentType = "image/gif";
context.Response.BufferOutput = false;
Eg:
public void RenderIt(HttpContext context)
{
context.Response.ContentType = "image/gif";
context.Response.BufferOutput = false;
string code = GetRandomText();
using(Bitmap bitmap = new Bitmap(160,50,System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
using(Graphics g = Graphics.FromImage(bitmap))
{
using(Pen pen = new Pen(Color.LavenderBlush)
{
using(SolidBrush b = new SolidBrush(Color.LightPink))
{
using(SolidBrush blue = new SolidBrush(Color.White))
{
Rectangle rect = new Rectangle(0,0,160,50);
int counter = 0;
g.DrawRectangle(pen, rect);
g.FillRectangle(b, rect);
for (int i = 0; i < code.Length; i++)
{
g.DrawString(code[i].ToString(), new Font("Tahoma", 10 + rand.Next(14, 18)), blue, new PointF(10 + counter, 10));
counter += 20;
}
DrawRandomLines(g);
g.Dispose();
b.Dispose();
blue.Dispose();
// Return
bitmap.Save(context.Response.OutputStream, ImageFormat.Gif);
// Dispose
bitmap.Dispose();
}
}
}
}
}
context.Response.End();
}
i have a greyscale image and i want to scan the pixels out of the Image and this is what i get :
var i:int;
var j:int;
for (i = 0; i < img.contentWidth ; i++)
{
for(j = 0; j < img.contentHeight; j++){
pixeldaten.addItem({x:i,y:j,pixel:bmd.getPixel(i,j)});
}
}
but the table doesn't look like RGB Values . (R , B , and G must be the same)
: example
getPixel should return the hex value value of the pixel, you could then do something like
// get the red value
bmd.getPixel(i,j) >> 16
//for Image processing
Bitmap myBitmap = new Bitmap(CurrentBitmap);
int imgH = myBitmap.Height;
int imgW = myBitmap.Width;
ARed = new double[imgH, imgW];
AGreen = new double[imgH, imgW];
ABlue = new double[imgH, imgW];
doubles = new double[imgH, imgW];
var max = new double[imgH, imgW];
var min = new double[0, 0];
//seperating each RGB components
for (int x = 0; x < imgH; x++)
{
for (int y = 0; y < imgW; y++)
{
Color color = myBitmap.GetPixel(x, y);
// things we do with pixelColor
//ARed[x][y] = myBitmap.GetPixel >> 16;
ARed[x, y] = color.R;
ABlue[x, y] = color.B;
AGreen[x, y] = color.G;
max[x, y] = ARed[x, y];
}
}
Bitmap bmp = new Bitmap(pictureBox1.Image);
bmp.getPixel(i,j).R