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class OrientedCursor{
constructor(elementID){
this.elementID = elementID;
this.tiltX = 0;
this.tiltY = 0;
this.pressure = 0;
this.diameter = 0;
this.targetAngle = 0;
this.isOnCanvas = false;
}
// -----------------------------------------
// -----------------------------------------
catchCursor(){
let getCanvas = document.getElementById(this.elementID);
getCanvas.addEventListener("pointermove", (e) => {
//console.log("pointerMove");
if (this.isOnCanvas) {
this.tiltX = e.tiltX;
this.tiltY = e.tiltY;
this.pressure = e.pressure;
//console.log(inclinationX + ' ' + inclinationY + ' ' + pressure);
}
}, false);
getCanvas.addEventListener("pointerdown", (e) => {
//console.log("pointerDown");
getCanvas.setPointerCapture(e.pointerId);
this.isOnCanvas = true;
this.tiltX = e.tiltX;
this.tiltY = e.tiltY;
this.pressure = e.pressure;
}, false);
getCanvas.addEventListener("pointerup", (e) => {
//console.log("pointerUp");
if (this.isOnCanvas) {
getCanvas.releasePointerCapture(e.pointerId);
this.isOnCanvas = false;
this.tiltX = e.tiltX;
this.tiltY = e.tiltY;
this.pressure = e.pressure;
//console.log(inclinationX + ' ' + inclinationY + ' ' + pressure);
}
}, false);
}
// -----------------------------------------
// -----------------------------------------
calculateAngle(){
this.targetAngle = atan2(this.tiltY, this.tiltX);
}
// -----------------------------------------
// -----------------------------------------
showData(){
// LIVE COORDINATES
push();
noFill();
stroke('#fff')
text('pressure: ' + this.pressure, 10, 30);
text('tilt_X: ' + this.tiltX, 10, 50);
text('tilt_Y: ' + this.tiltY, 10, 70);
text('angle arctan: ' + this.targetAngle, 10, 90);
pop();
}
// -----------------------------------------
// -----------------------------------------
mapPressure(){
this.diameter = map(this.pressure, 0, 1, 1, 3);
}
// -----------------------------------------
// -----------------------------------------
process_rotate(){
translate(mouseX, mouseY); //mouseX & mouseY
rotate(this.targetAngle);
translate(-mouseX, -mouseY); // -mouseX & -mouseY
}
// -----------------------------------------
// -----------------------------------------
showCursor(mouseX, mouseY){
// POINTER CENTER
push();
noStroke();
fill(0, 0, 0);
circle(mouseX, mouseY, 20);
pop();
// RECTANGLE SHAPE
push();
this.process_rotate()
noFill();
stroke(2)
rectMode(CENTER)
rect(mouseX, mouseY, this.diameter, 30); // reacts to pen pressure value
noStroke();
fill('yellow');
circle(mouseX, mouseY, 10); // shows the pivot point
pop();
// POINTS FROM STYLUS AT GOOD INCLINATION & PRESSURE VALUE
push();
this.process_rotate();
noFill();
stroke(1);
ellipseMode(CENTER);
circle(mouseX, mouseY + this.diameter, 10); // LEFT || WEST
circle(mouseX + this.diameter, mouseY, 10);// DOWN || SOUTH
circle(mouseX, mouseY - this.diameter, 10); // RIGHT || EAST
circle(mouseX - this.diameter, mouseY, 10); // UP || NORTH
pop();
circle(mouseX + this.diameter/4 * cos(this.targetAngle), mouseY + this.diameter/4 * sin(this.targetAngle), 1)
circle(mouseX + this.diameter/4 * cos(this.targetAngle + PI), mouseY + this.diameter/4 * sin(this.targetAngle+ PI), 1)
// TILT AXIS & LENGTH
push();
fill('red');
circle(mouseX + this.tiltX, mouseY + this.tiltY, 10);
pop();
push();
fill('blue');
circle(mouseX - this.tiltX, mouseY - this.tiltY, 10);
pop();
}
} |