92 lines
2.7 KiB
JavaScript
92 lines
2.7 KiB
JavaScript
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function Player(genome){
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this.x = START_X;
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this.y = START_Y;
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this.vx = 0;
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this.vy = 0;
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this.r = 6;
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this.brain = genome;
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this.brain.score = 0;
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players.push(this);
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}
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Player.prototype = {
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/** Update the stats */
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update: function(){
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var input = this.detect();
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var output = this.brain.activate(input);
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var moveangle = output[0] * 2 * PI;
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// Calculate next position
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this.ax = Math.cos(moveangle);
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this.ay = Math.sin(moveangle);
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this.vx += this.ax;
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this.vy += this.ay;
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// Limit speeds to maximum speed
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this.vx = this.vx > MAX_SPEED ? MAX_SPEED : this.vx < -MAX_SPEED ? -MAX_SPEED : this.vx;
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this.vy = this.vy > MAX_SPEED ? MAX_SPEED : this.vy < -MAX_SPEED ? -MAX_SPEED : this.vy;
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this.x += this.vx;
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this.y += this.vy;
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// Limit position to width and height
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this.x = this.x >= WIDTH ? WIDTH : this.x <= 0 ? 0 : this.x;
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this.y = this.y >= HEIGHT ? HEIGHT : this.y <= 0 ? 0 : this.y;
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if(this.x == 0 || this.x == WIDTH) this.vx = -this.vx;
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if(this.y == 0 || this.y == HEIGHT) this.vy = -this.vy;
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this.score();
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},
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/** Calculate fitness of this players genome **/
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score: function(){
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var dist = distance(this.x, this.y, walker.x, walker.y);
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if(!isNaN(dist) && dist < SCORE_RADIUS){
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this.brain.score += SCORE_RADIUS - dist;
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}
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// Replace highest score to visualise
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highestScore = this.brain.score > highestScore ? this.brain.score : highestScore;
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},
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/** Display the player on the field, parts borrowed from the CodingTrain */
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show: function(){
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// Draw a triangle rotated in the direction of velocity
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var angle = angleToPoint(this.x, this.y, this.x + this.vx, this.y + this.vy) + HALF_PI;
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var color = activationColor(this.brain.score, highestScore);
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push();
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translate(this.x, this.y);
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rotate(angle);
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fill(color);
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beginShape();
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vertex(0, -this.r * 2);
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vertex(-this.r, this.r * 2);
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vertex(this.r, this.r * 2);
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endShape(CLOSE);
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pop();
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},
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/** Detect and normalize inputs */
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detect: function(){
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var dist = Math.sqrt(this.x, this.y, walker.x, walker.y) / Math.sqrt(WIDTH**2 + HEIGHT**2);
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var targetAngle = angleToPoint(this.x, this.y, walker.x, walker.y) / TWO_PI;
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var vx = (this.vx + MAX_SPEED) / MAX_SPEED;
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var vy = (this.vy + MAX_SPEED) / MAX_SPEED;
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var tvx = (walker.vx + MAX_SPEED) / MAX_SPEED;
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var tvy = (walker.vy + MAX_SPEED) / MAX_SPEED;
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// NaN checking
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targetAngle = isNaN(targetAngle) ? 0 : targetAngle;
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dist = isNaN(dist) ? 0 : dist;
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return [vx, vy, tvx, tvy, targetAngle, dist];
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},
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};
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