274 lines
7.1 KiB
JavaScript
274 lines
7.1 KiB
JavaScript
const vec = p5.Vector;
|
|
|
|
class Leg {
|
|
constructor() {
|
|
this.base = new vec(0, 0);
|
|
this.end = new vec(0, 0);
|
|
this.interPos = new vec(0, 0);
|
|
this.ikJoint = new IKJoint(8, 8);
|
|
this.repositionDist = 50;
|
|
this.moveSpeed = 0.4;
|
|
}
|
|
|
|
moveTo(startX, startY, endX, endY) {
|
|
this.base = new vec(startX, startY);
|
|
let target = new vec(endX, endY);
|
|
|
|
if (vec.dist(target, this.end) > this.repositionDist) {
|
|
this.end = new vec(endX, endY);
|
|
}
|
|
this.interPos.lerp(this.end, this.moveSpeed);
|
|
this.ikJoint.moveTo(startX, startY, this.interPos.x, this.interPos.y);
|
|
}
|
|
|
|
getPoints() {
|
|
return this.ikJoint.points;
|
|
}
|
|
}
|
|
|
|
class IKJoint {
|
|
constructor(numSegments, pointDist) {
|
|
this.origin = new vec(0, 0);
|
|
this.points = [];
|
|
for (let i = 0; i < numSegments + 1; i++) {
|
|
this.points.push(new ConstraintPoint(0, 0, pointDist, 0.5));
|
|
}
|
|
this.pointDist = pointDist;
|
|
this.iterations = 20;
|
|
}
|
|
|
|
moveStart(targetX, targetY) {
|
|
let numPts = this.points.length;
|
|
this.points[0].size = 1;
|
|
this.points[0].follow(targetX, targetY);
|
|
|
|
for (let i = 1; i < numPts; i++) {
|
|
let prevPoint = this.points[i - 1];
|
|
this.points[i].follow(prevPoint.pos.x, prevPoint.pos.y, prevPoint.forward);
|
|
}
|
|
}
|
|
|
|
moveEnd(targetX, targetY) {
|
|
let numPts = this.points.length;
|
|
this.points[numPts - 1].pos.x = targetX;
|
|
this.points[numPts - 1].pos.y = targetY;
|
|
|
|
for (let i = numPts - 2; i >= 0; i--) {
|
|
let prevPoint = this.points[i + 1];
|
|
this.points[i].follow(prevPoint.pos.x, prevPoint.pos.y, null);
|
|
}
|
|
}
|
|
|
|
moveTo(origX, origY, targetX, targetY) {
|
|
for (let i = 0; i < this.iterations; i++) {
|
|
this.moveEnd(targetX, targetY);
|
|
this.moveStart(origX, origY);
|
|
}
|
|
}
|
|
}
|
|
|
|
class ConstraintPoint {
|
|
constructor(x, y, size, angleConstraint = 0.2) {
|
|
this.size = size;
|
|
this.pos = new vec(x, y);
|
|
this.forward = new vec(0, 0);
|
|
this.angleConstraint = angleConstraint;
|
|
}
|
|
|
|
getRel(angleOffset, dist) {
|
|
let dir = vec.rotate(this.forward, angleOffset);
|
|
dir.setMag(dist);
|
|
return vec.add(this.pos, dir);
|
|
}
|
|
|
|
follow(targetX, targetY, parentForward = null) {
|
|
let target = new vec(targetX, targetY);
|
|
let targetForward = vec.sub(target, this.pos);
|
|
let targetAngle = targetForward.heading();
|
|
|
|
if (parentForward) {
|
|
let parentAngle = parentForward.heading();
|
|
let diff = targetAngle - parentAngle;
|
|
|
|
while (diff < -PI) diff += TWO_PI;
|
|
while (diff > PI) diff -= TWO_PI;
|
|
|
|
let maxAngle = this.angleConstraint;
|
|
diff = constrain(diff, -maxAngle, maxAngle);
|
|
|
|
targetAngle = parentAngle + diff;
|
|
}
|
|
|
|
this.forward = p5.Vector.fromAngle(targetAngle);
|
|
|
|
let dir = p5.Vector.mult(this.forward, -this.size);
|
|
this.pos = vec.add(target, dir);
|
|
}
|
|
}
|
|
|
|
function drawPoints(points, sizes, turnSegments = 10) {
|
|
beginShape();
|
|
|
|
let numPoints = points.length;
|
|
let head = points[0];
|
|
let tail = points[numPoints - 1];
|
|
|
|
for (let angle = -HALF_PI; angle <= HALF_PI; angle += PI / turnSegments) {
|
|
let p = head.getRel(angle, sizes[0]);
|
|
curveVertex(p.x, p.y);
|
|
}
|
|
|
|
for (let i = 1; i < numPoints - 1; i++) {
|
|
let p = points[i].getRel(HALF_PI, sizes[i]);
|
|
curveVertex(p.x, p.y);
|
|
}
|
|
|
|
for (let angle = HALF_PI; angle <= HALF_PI + PI; angle += PI / turnSegments) {
|
|
let p = tail.getRel(angle, sizes[numPoints - 1]);
|
|
curveVertex(p.x, p.y);
|
|
}
|
|
|
|
for (let i = numPoints - 2; i >= 1; i--) {
|
|
let p = points[i].getRel(-HALF_PI, sizes[i]);
|
|
curveVertex(p.x, p.y);
|
|
}
|
|
endShape(CLOSE);
|
|
|
|
}
|
|
|
|
function drawGills(basePoint, sign) {
|
|
push();
|
|
|
|
let p = basePoint.getRel(sign * 1.5 * PI, 35);
|
|
translate(p.x, p.y);
|
|
rotate(basePoint.forward.heading() + 0.7 * sign);
|
|
|
|
strokeWeight(4);
|
|
stroke(0);
|
|
fill(243, 158, 189);
|
|
|
|
for (let i = -1; i <= 1; i++) {
|
|
push();
|
|
rotate(i * QUARTER_PI);
|
|
ellipse(-10, 0, 80, 30);
|
|
pop();
|
|
}
|
|
noStroke();
|
|
|
|
for (let i = -1; i <= 1; i++) {
|
|
push();
|
|
rotate(i * QUARTER_PI);
|
|
ellipse(-10, 0, 80, 30);
|
|
pop();
|
|
}
|
|
fill(249, 182, 249);
|
|
ellipse(16, 0, 40, 55);
|
|
|
|
pop();
|
|
}
|
|
|
|
let numPoints = 0;
|
|
const bodySizes = [60, 55, 50, 40, 45, 47, 50, 47, 45, 42, 39, 35, 30, 25, 22, 17, 13];
|
|
const legSizes = Array.from({ length: 20 }, () => 15);
|
|
const bodyPoints = [];
|
|
const leg1 = new Leg();
|
|
const leg2 = new Leg();
|
|
const leg3 = new Leg();
|
|
const leg4 = new Leg();
|
|
let mouseInter = new vec(0, 0);
|
|
let baseColor;
|
|
let gillColor;
|
|
|
|
function setup() {
|
|
createCanvas(displayWidth, displayHeight);
|
|
numPoints = bodySizes.length;
|
|
for (let i = 0; i < numPoints; i++) {
|
|
let pt = new ConstraintPoint(400, 400, 20);
|
|
bodyPoints.push(pt);
|
|
}
|
|
baseColor = color(249, 182, 249)
|
|
gillColor = color(243, 158, 189)
|
|
}
|
|
|
|
function draw() {
|
|
background(150);
|
|
|
|
mouseInter.lerp(new vec(mouseX, mouseY), 0.01);
|
|
let time = millis();
|
|
|
|
// fisica
|
|
bodyPoints[0].follow(mouseInter.x, mouseInter.y);
|
|
|
|
for (let i = 1; i < numPoints; i++) {
|
|
let prevPoint = bodyPoints[i - 1];
|
|
bodyPoints[i].follow(prevPoint.pos.x, prevPoint.pos.y, prevPoint.forward);
|
|
|
|
let tailStart = Math.floor(numPoints / 2);
|
|
if (i > tailStart) {
|
|
let wiggleIntensity = map(i, tailStart, numPoints - 1, 0, 4);
|
|
|
|
let wiggleAmount = sin(time * 0.004 - i * 0.5) * wiggleIntensity;
|
|
|
|
let lateralDir = vec.rotate(bodyPoints[i].forward, HALF_PI);
|
|
bodyPoints[i].pos.add(p5.Vector.mult(lateralDir, wiggleAmount));
|
|
}
|
|
}
|
|
let legEndDist = 70;
|
|
let baseJointL1 = bodyPoints[2];
|
|
let baseL1 = baseJointL1.getRel(-HALF_PI, 30);
|
|
let endL1 = baseJointL1.getRel(-HALF_PI, legEndDist);
|
|
let baseR1 = baseJointL1.getRel(HALF_PI, 30);
|
|
let endR1 = baseJointL1.getRel(HALF_PI, legEndDist);
|
|
|
|
let baseJointL2 = bodyPoints[6];
|
|
let baseL2 = baseJointL2.getRel(-HALF_PI, 30);
|
|
let endL2 = baseJointL2.getRel(-HALF_PI, legEndDist);
|
|
let baseR2 = baseJointL2.getRel(HALF_PI, 30);
|
|
let endR2 = baseJointL2.getRel(HALF_PI, legEndDist);
|
|
|
|
leg1.moveTo(baseL1.x, baseL1.y, endL1.x, endL1.y);
|
|
leg2.moveTo(baseR1.x, baseR1.y, endR1.x, endR1.y);
|
|
leg3.moveTo(baseL2.x, baseL2.y, endL2.x, endL2.y);
|
|
leg4.moveTo(baseR2.x, baseR2.y, endR2.x, endR2.y);
|
|
|
|
// dibujar
|
|
fill(baseColor);
|
|
stroke(0);
|
|
strokeWeight(2);
|
|
|
|
drawPoints(leg1.getPoints(), legSizes);
|
|
drawPoints(leg2.getPoints(), legSizes);
|
|
drawPoints(leg3.getPoints(), legSizes);
|
|
drawPoints(leg4.getPoints(), legSizes);
|
|
|
|
let currentBodySizes = [...bodySizes];
|
|
let breathSpeed = time * 0.003;
|
|
|
|
for (let i = 0; i < numPoints; i++) {
|
|
let centerWeight = sin(map(i, 0, numPoints - 1, 0, PI));
|
|
|
|
let breathExpansion = sin(breathSpeed) * 1 * centerWeight + 1;
|
|
currentBodySizes[i] += breathExpansion;
|
|
}
|
|
|
|
drawPoints(bodyPoints, currentBodySizes);
|
|
|
|
let p1 = bodyPoints[4].pos;
|
|
let p2 = bodyPoints[6].pos;
|
|
let p3 = bodyPoints[8].pos;
|
|
let p4 = bodyPoints[10].pos;
|
|
push();
|
|
noStroke();
|
|
fill(gillColor);
|
|
bezier(p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, p4.x, p4.y);
|
|
pop();
|
|
|
|
drawGills(bodyPoints[2], 1);
|
|
drawGills(bodyPoints[2], -1);
|
|
|
|
let eye1 = bodyPoints[0].getRel(HALF_PI / 2, 45);
|
|
let eye2 = bodyPoints[0].getRel(-HALF_PI / 2, 45);
|
|
fill(0);
|
|
circle(eye1.x, eye1.y, 12);
|
|
circle(eye2.x, eye2.y, 12);
|
|
}
|