Related
this is for a project in my p5.js class.
I have a class that creates a 3D shape and i call it in my draw function in a for loop. In this for loop i create the shape and it has a rotation. If i press the the "a" button, it creates a new shape. My problem is, that i want to stop the rotation of the previous shape when i create a new shape, but i can't find a solution.
this is my code:
let BLACK;
let GRAY;
let LIGHTGRAY;
let WHITE;
let RED;
let forms = [];
let coorX, coorY, coorZ, colour;
let COL = [];
let ran;
function setup() {
createCanvas(586, 810, WEBGL);
BLACK = color(0);
GRAY = color(70);
LIGHTGRAY = color(180);
WHITE = color(255);
RED = color(217, 4, 33);
COL = [BLACK, WHITE, GRAY, RED, RED\]
ran = random(0.01, 0.1)
}
function draw() {
background(80);
pointLight(250, 250, 250, 250);
for (let i = 0; i < forms.length; i++) {
newSpeed = 0.05 + i * ran
forms[i].create(newSpeed, 0.01);
if (forms.length > 1) {
rotateX(0);
}
}
if (forms.length > 10) {
//Array limited on 10 objects
forms.splice(0, 1)
}
}
function keyTyped() {
if (key === 'a') {
coorX = int(random(-100, 100))
coorY = int(random(-100, 100))
coorZ = int(random(-200, 200))
forms.push(new Shape(coorX, coorY, coorZ));
}
if (key === 'd') {
forms.pop()
}
}
class Shape {
constructor(posX, posY, posZ, colour) {
this.x = 50; //width
this.y = 50; //height
this.z = 50; // depth
this.x1 = 0;
this.y1 = 500;
this.z1 = 80;
this.posX = posX;
this.posY = posY;
this.posZ = posZ;
this.rand = int(random(0, 5));
this.colour = colour;
}
create (speed, rotation) {
//create a new shape
stroke(0);
strokeWeight(0);
push();
translate(this.posX, this.posY, this.posZ)
//rotate the shape
this.speed = speed;
this.rotation = rotation;
rotateX((frameCount * this.rotation) * speed)
rotateY((frameCount * this.rotation) * speed)
if (this.rand == 1) {
fill(RED)
box(50, 50, 50)
}
if (this.rand == 2) {
fill(LIGHTGRAY);
sphere(50, 10)
}
if (this.rand == 3) {
fill(WHITE);
cylinder(5, 280, 15)
}
if (this.rand == 4) {
fill(GRAY);
torus(90, 24, 3)
}
pop();
}
}
I tried separating the rotation and the creation function, but then it rotated the whole canvas and not the shapes individually.
In fact, in p5.js approach is completely different, and You need to analyze this example: https://p5js.org/examples/simulate-multiple-particle-systems.html
But, to solve Your problem in 'object style':
1 - You need to memorize state of the object, in this case the frameCount of the last frame when the key a was pressed,
2 - draw all shapes with memorized lastActiveFrame and one just with recent frameCount.
let BLACK;
let GRAY;
let LIGHTGRAY;
let WHITE;
let RED;
let forms = [];
let coorX, coorY, coorZ, colour;
let COL = [];
let ran;
function setup() {
createCanvas(586, 810, WEBGL);
BLACK = color(0);
GRAY = color(70);
LIGHTGRAY = color(180);
WHITE = color(255);
RED = color(217,4,33);
COL = [BLACK, WHITE, GRAY, RED, RED]
ran = random(0.01,0.1)
coorX = int(random(-100,100))
coorY = int(random(-100,100))
coorZ = int(random(-200,200))
forms.push(new Shape(coorX, coorY, coorZ));
}
function draw() {
background(80);
pointLight(250, 250, 250, 250);
for(let i = 0; i < forms.length-1; i++) {
newSpeed = 0.05 + i * ran
forms[i].show(newSpeed, 0.01);
}
forms[forms.length-1].rotate(2.5, 0.01);
if (forms.length > 10){
//Array limited on 10 objects
forms.splice(0,1)
}
}
function keyTyped() {
if (key === 'a'){
coorX = int(random(-100,100))
coorY = int(random(-100,100))
coorZ = int(random(-200,200))
forms.push(new Shape(coorX, coorY, coorZ));
}
if (key === 'd'){
forms.pop()
}
}
class Shape {
constructor(posX, posY, posZ, colour){
this.posX = posX;
this.posY = posY;
this.posZ = posZ;
this.rand = int(random(0,5));
this.colour = colour;
this.lastActiveFrame = frameCount;
}
rotate(speed, rotation){
//create a new shape
stroke(0);
strokeWeight(0);
push();
translate(this.posX, this.posY, this.posZ)
//rotate the shape
this.lastActiveFrame = frameCount;
rotateX(frameCount * rotation * speed)
rotateY(frameCount * rotation * speed)
if (this.rand == 1){
fill(RED)
box(50,50,50)
}if(this.rand == 2) {
fill(LIGHTGRAY);
sphere(50,10)
}if(this.rand == 3){
fill(WHITE);
cylinder(5,280,15)
}if(this.rand == 4){
fill(GRAY);
torus(90,24,3)
}
pop();
}
show(speed, rotation){
//create a new shape
stroke(0);
strokeWeight(0);
push();
translate(this.posX, this.posY, this.posZ)
//rotate the shape
rotateX(this.lastActiveFrame * rotation * speed)
rotateY(this.lastActiveFrame * rotation * speed)
if (this.rand == 1){
fill(RED)
box(50,50,50)
}if(this.rand == 2) {
fill(LIGHTGRAY);
sphere(50,10)
}if(this.rand == 3){
fill(WHITE);
cylinder(5,280,15)
}if(this.rand == 4){
fill(GRAY);
torus(90,24,3)
}
pop();
}
}
In the console, p5.js says that the 4th argument of pointLight() must be a Vector. That argument is used to tell in which direction the light will point, as for the arguments 1 - 3, they tell where is the pointLight.
Vector reference
pointLight reference
I am trying to print selected control to PDF/printer yet I have problem with positioning it on printed page.
When I changed location in Rect it doesn't affect the outcome. I want the control to be in the center of the page or at least the left top corner of the control should be in left top corner of the page, but all the time I have the same picture which starts at the middle of page.
This is my code:
private async Task PrintObjectVisual(bool canUserSelectPrinter, FrameworkElement frameworkElement)
{
if (_CreatePrinterDialog(canUserSelectPrinter, out var prnt)) return;
var offset = VisualTreeHelper.GetOffset(frameworkElement);
Transform originalScale = frameworkElement.LayoutTransform.Clone();
try
{
bool allowForceLandscape = true;
bool forceLandscape =
allowForceLandscape &&
(_starMainPage.ActPage.PresPage.PrintLandscape || frameworkElement.ActualWidth > prnt.PrintableAreaWidth)
||
(frameworkElement is IGraphViewControl || frameworkElement is IMapViewControl);
double scale = 0.0;
PageMediaSize pageSize = null;
pageSize = new PageMediaSize(PageMediaSizeName.ISOA4, CmToPx(29.7), CmToPx(21));
prnt.PrintTicket.PageMediaSize = pageSize;
if (forceLandscape)
{
prnt.PrintTicket.PageOrientation = PageOrientation.Landscape;
if (pageSize.Width != null && pageSize.Height != null)
scale = Math.Min(
(pageSize.Height.Value / frameworkElement.ActualWidth), (pageSize.Width.Value / frameworkElement.ActualHeight));
}
else
{
prnt.PrintTicket.PageOrientation = PageOrientation.Portrait;
if (pageSize.Width != null && pageSize.Height != null)
scale = Math.Min(
(pageSize.Width.Value / frameworkElement.ActualWidth), (pageSize.Height.Value / frameworkElement.ActualHeight));
}
//if (scale > 1.0)
// scale = 1.0;
frameworkElement.LayoutTransform = new ScaleTransform(scale, scale);
// after a thought i know that i might not need it
//var size = _GetPrintAreaSize(forceLandscape, pageSize);
//frameworkElement.Measure(size);
//frameworkElement.Arrange(
// new Rect(new Point(0, 0), size));
prnt.PrintVisual(frameworkElement, $"Printing Object {frameworkElement.Name}");
}
catch (Exception e)
{
PresHelper.WriteToDebug(_presBaseObject, e);
}
finally
{
frameworkElement.LayoutTransform = originalScale;
// after a thought i know that i might not need it
//Size size2 = new Size(_starMainPage.Canvas.ActualWidth, _starMainPage.Canvas.ActualHeight);
//frameworkElement.Measure(size2);
//var x = offset.X - (offset.X * 2);// offset.X
//var y = offset.Y - (offset.Y * 2);// offset.X
//frameworkElement.Arrange(new Rect(new Point(x, y), size2));
}
}
private static bool _CreatePrinterDialog(bool canUserSelectPrinter, out PrintDialog prnt)
{
prnt = new PrintDialog();
if (canUserSelectPrinter)
{
var result = prnt.ShowDialog();
if (result == false)
return true;
}
return false;
}
private Size _GetPrintAreaSize(bool forceLandscape, PageMediaSize pageSize)
{
if (pageSize.Height == null || pageSize.Width == null) throw new NullReferenceException($"Page size values are null! Can't print without it.");
Size size;
if (forceLandscape)
size = new Size(pageSize.Height.Value, pageSize.Width.Value);
else
size = new Size(pageSize.Width.Value, pageSize.Height.Value);
return size;
}
Ok, so after some time on it I have solved the problem.
I assign original Canvas.LeftProperty and TopProperty to some private class members and then assign my own (double) values.
This code is just before the printing.
Later i'm assigning old values:
frameworkElement.LayoutTransform = new ScaleTransform(scale, scale);
left = (double)frameworkElement.GetValue(Canvas.LeftProperty);
top = (double)frameworkElement.GetValue(Canvas.TopProperty);
frameworkElement.SetValue(Canvas.LeftProperty, _marginSize);
frameworkElement.SetValue(Canvas.TopProperty, _marginSize);
prnt.PrintVisual(frameworkElement, $"Printing MikObject {frameworkElement.Name}");
}
catch (Exception e)
{
PresHelper.WriteToDebug(_presBaseObject, e);
}
finally
{
frameworkElement.SetValue(Canvas.LeftProperty, left);
frameworkElement.SetValue(Canvas.TopProperty, top);
frameworkElement.LayoutTransform = originalScale;
}
I have a WPf application that monitors a certain region on screen keeping track of the count of pixels with certain colors.
What i want is the actual capturing of the region and reading of values to happen in another thread, but i cant seem to wrap my head around how to actuale grab the region while i focus another window.
Here is some code:
// Colors to keep track of
var fooColor = (System.Windows.Media.Color)System.Windows.Media.ColorConverter.ConvertFromString("#FF6ebfe2");
var barColor = (System.Windows.Media.Color)System.Windows.Media.ColorConverter.ConvertFromString("#FFe67e6e");
// previewWindow : Rectangle Control
var X = (int)previewWindow.PointToScreen(new System.Windows.Point(0, 0)).X;
var Y = (int)previewWindow.PointToScreen(new System.Windows.Point(0, 0)).Y;
Rectangle rect = new Rectangle(X, Y, (int)previewWindow.ActualWidth, (int)previewWindow.ActualHeight);
Bitmap bmp = new Bitmap(rect.Width, rect.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (var screenBmp = new Bitmap(
rect.Width,
rect.Height,
System.Drawing.Imaging.PixelFormat.Format32bppArgb)
)
{
using (var bmpGraphics = Graphics.FromImage(screenBmp))
{
bmpGraphics.CopyFromScreen(X, Y, 0, 0, screenBmp.Size);
BitmapSource bmpSource = Imaging.CreateBitmapSourceFromHBitmap(
screenBmp.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
var red = 0;
var blue = 0;
for (int i = 0; i < rect.Width; i++)
{
for (int x = 0; x < rect.Height; x++)
{
System.Windows.Media.Color color = GetPixelColor(bmpSource, i, x);
if (color == fooColor)
{
blue++;
}
else if (color == barColor)
{
red++;
}
}
}
txtbar.Text = red.ToString();
txtfoo.Text = blue.ToString();
if (red < 150)
{
ProcessBar();
}
if (blue < 150)
{
ProcessFoo();
}
}
}
I'm currently writing a visualization via D3 and I hope you can help me out.
To get an idea of what I'm making you can view this link: https://dl.dropboxusercontent.com/u/56480311/Data-visualization/index.html
I'm facing two problems: the first is that I can't seem to place .csv data in a 2D array. I found multiplie tutorials about placing it in a normal array but the only solution I came up with if your data is in a table, is to use a 2D array. I couldn't find how to do this so what I thought would help:
var lines = []; //define lines as an array
//retrieve data from .csv file
d3.csv("https://dl.dropboxusercontent.com/u/56480311/Data-visualization/growth-prep.csv", function(data) {
lines = data.map(function(d) {
return d;
});
});
//create 2D array named myArray
var myArray = new Array(10);
for (var i = 0; i < 10; i++) {
myArray[i] = new Array(18);
}
//place each value of .csv file into myArray
for (var j = 0; j < lines.length; j++) {
var values = lines[j].split(";");
for (var k = 0; k < values.length; k++) {
myArray[k][j] = values[k];
}
}
This code doesn't work, however. Console keeps saying that the arrays are undefined and they're empty.
A second problem I'm facing is in visualizing the data. I sum three values that are next to each other (so for example dataset[0][0] + dataset[0][1] + dataset[0][2]). I draw this value as the width of a rectangle. On top of that, I want to draw three different rectangles each with the value of one of three. So in this case there is one rectangle consisting of dataset[0][0] + dataset[0][1] + dataset[0][2] and on top there is a rectangle showing data dataset[0][0], one showing data dataset[0][1] and a third showing data dataset[0][2]. I want the three smaller ones only to appear once the mouse hovers over the 'sum' / parent rectangle.
If you view the link you can see what I mean. Everything is already there, only the three smaller rectangles have opacity 0 so you don't see them yet (but you can find them via inspect elements).
I figured I could do this by setting the opacity of the three rectangles to 0 and to 1 once the mouse hovers. The best solution to me would be to place the three rectangles into one kind of div. Once the mouse hovers over it, its opacity is 1. Only I can't figure out how to easily give different class names without having to do it by hand for each rectangle separately. Does anyone know how to do this or else have a better solution to change the opacity of all three rectangles once the mouse hovers over the 'bigger' rectangle?
This is the code:
var dataset = [[6,6,3,3,3,0,6,6,0,12,6,6,0,0,18,6,3,3],[3,0,0,6,3,0,3,3,0,9,3,0,0,0,18,6,6,6],[3,0,3,6,3,3,6,0,3,9,6,3,0,0,15,6,6,6],[6,6,3,3,0,3,6,6,6,12,6,6,0,0,18,6,6,3],[6,6,0,6,0,0,6,6,6,12,6,6,0,0,24,6,6,0],[3,6,3,6,3,3,6,6,3,3,0,0,0,0,15,3,9,6],[3,3,0,3,0,3,3,3,3,9,3,0,0,0,15,6,3,9],[0,0,0,3,0,6,6,3,3,3,0,3,0,0,24,6,12,6],[6,6,3,6,0,0,9,9,6,12,6,6,0,0,15,3,3,3],[6,6,0,6,3,0,6,6,0,9,6,3,0,0,9,3,6,0]];
var h = 800;
var w = 800;
//create svg of 800x800px
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
var xPos = 150;
for (var k = 0; k < 10; k++) { //loop through lines of array
var yPos = 40 + k*80;
for (var j = 0; j < 18; j++) { //loop through rows of array
var count = j + 1;
//assign data of three boxes to value1/value2/value3 with which we will later on draw three separate rectangles to visualize the data
if (count == 1 || count == 4 || count == 7 || count == 10 || count == 13 || count == 16) {
var value1 = dataset[k][j];
}
if (count == 2 || count == 5 || count == 8 || count == 11 || count == 14 || count == 17) {
var value2 = dataset[k][j];
}
if (count == 3 || count == 6 || count == 9 || count == 12 || count == 15 || count == 18) {
var value3 = dataset[k][j];
}
if (count % 3 ==0) {
var sum = dataset[k][j] + dataset[k][j-1] + dataset[k][j-2]; //count the three values to also draw one bigger rectangle of their sum
var rectangle = svg.append("rect")
.attr("x", xPos)
.attr("y", yPos)
.attr("width", sum*5)
.attr("height", 20)
.attr("fill", function(d) {
if (count == 3) {
return "LightSeaGreen";
}
else if (count == 6) {
return "MediumSeaGreen";
}
else if (count == 9) {
return "MediumSpringGreen";
}
else if (count == 12) {
return "LimeGreen";
}
else if (count == 15) {
return "ForestGreen"
}
else if (count == 18) {
return "GreenYellow"
}
});
for (var l = 0; l < 3; l++) { //draw three 'sub' rectangles on top of the one 'sum' rectangle. they should appear when the mouse hovers over their 'sum' rectangle
var rectangle2 = svg.append("rect")
.attr("class", "sqr")
.attr("x", function() {
if (l == 0) {
return xPos;
} else if (l == 1) {
return xPos + value1*5;
} else if (l == 2) {
return xPos + (value1+value2)*5;
}
})
.attr("y", yPos)
.attr("width", function() {
if (l == 0) {
return value1*5;
} else if (l == 1) {
return value2*5;
} else if (l == 2) {
return value3*5;
}
})
.attr("height", 20)
.attr("fill", function() {
if (l == 0) {
return "SteelBlue";
} else if (l == 1) {
return "aquamarine";
} else if (l == 2) {
return "SkyBlue";
}
})
.attr("opacity", 0); //in first instance the rectangles are not visible. Opacity should turn to 1 when the mouse hovers over their according div
}
if (sum > 0) {
xPos = xPos + sum*5 + 5;
}
}
}
xPos = 150;
}
I'm sure the answer is here somewhere but I really can't find it.
I have a LineChart with a lot of entries (lets say 1000). In the plot I can see (and adjust (see A)) the Y-axis perfectly well. Just the X-axis drives me nuts!
With 1000 entries there is no number of the bottom of the plot.
A:
With this I can adjust the Y-axis nicely.
final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setRange(0.00, 1.00);
rangeAxis.setTickUnit(new NumberTickUnit(0.2));
rangeAxis.setVerticalTickLabels(false);
I wanna do the same with the X-axis.
Please help me out.
Thanks a lot
-> problem with first answer | Domain axis with 100 numbers and an interval of 50
I am afraid you have to modified the code of JfreeChart, Is Opensource great?
I have this problem before for my BarChart, What I did is to customize the tick on x-Axis
I only implemented this for CategoryAxis.java alone. I hope this can shed some light on you.
Please note the variable "tickInterval", I added this property to the class,
for example you have 1000 numbers, if set tickInterval as 99, only
0, 100, 200, 300 ... will show up.
bye the way, my freechart version is 1.0.5
public List refreshTicks(Graphics2D g2,
AxisState state,
Rectangle2D dataArea,
RectangleEdge edge) {
List ticks = new java.util.ArrayList();
// sanity check for data area...
if (dataArea.getHeight() <= 0.0 || dataArea.getWidth() < 0.0) {
return ticks;
}
CategoryPlot plot = (CategoryPlot) getPlot();
List categories = plot.getCategoriesForAxis(this);
double max = 0.0;
if (categories != null) {
CategoryLabelPosition position
= this.categoryLabelPositions.getLabelPosition(edge);
float r = this.maximumCategoryLabelWidthRatio;
if (r <= 0.0) {
r = position.getWidthRatio();
}
float l = 0.0f;
if (position.getWidthType() == CategoryLabelWidthType.CATEGORY) {
l = (float) calculateCategorySize(categories.size(), dataArea,
edge);
}
else {
if (RectangleEdge.isLeftOrRight(edge)) {
l = (float) dataArea.getWidth();
}
else {
l = (float) dataArea.getHeight();
}
}
int categoryIndex = 0;
Iterator iterator = categories.iterator();
while (iterator.hasNext()) {
Comparable category = (Comparable) iterator.next();
if(categoryIndex>0 && tickInterval>0)
{
if((categoryIndex+1) % (tickInterval+1) > 0)
{
category = "";
}
}
TextBlock label = null;
if(tickInterval> 0)
{
label = this.createSingleLabel(category, l * r, edge, g2);
}
else
{
label = createLabel(category, l * r, edge, g2);
}
if (edge == RectangleEdge.TOP || edge == RectangleEdge.BOTTOM) {
max = Math.max(max, calculateTextBlockHeight(label,
position, g2));
}
else if (edge == RectangleEdge.LEFT
|| edge == RectangleEdge.RIGHT) {
max = Math.max(max, calculateTextBlockWidth(label,
position, g2));
}
Tick tick = new CategoryTick(category, label,
position.getLabelAnchor(), position.getRotationAnchor(),
position.getAngle());
ticks.add(tick);
categoryIndex = categoryIndex + 1;
}
}
state.setMax(max);
return ticks;
}