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import { Container, Graphics, Text } from 'pixi.js';
/**
* WaterfallGraph - A scrolling waterfall display
* Starts simple with basic line rendering
*/
export class WaterfallGraph {
constructor(config) {
this.x = config.x;
this.y = config.y;
this.width = config.width;
this.height = config.height;
this.title = config.title;
this.baseColor = config.color || 0xff6666;
this.container = new Container();
this.container.x = this.x;
this.container.y = this.y;
// Graphics layers
this.borderGraphics = new Graphics();
this.gridGraphics = new Graphics();
this.linesGraphics = new Graphics();
this.container.addChild(this.gridGraphics);
this.container.addChild(this.linesGraphics);
this.container.addChild(this.borderGraphics);
// Title text
this.titleText = new Text({
text: this.title,
style: {
fontFamily: 'Arial',
fontSize: 18,
fill: 0xeeeeee,
}
});
this.titleText.x = 10;
this.titleText.y = 10;
this.container.addChild(this.titleText);
// Waterfall data
this.lines = [];
this.maxLines = 50;
this.pointsPerLine = 100;
this.frameCounter = 0;
this.showGrid = true;
// Time scaling and zoom
this.scrollSpeed = 1.0; // Speed multiplier for scrolling
this.baseScrollSpeed = 1.0;
this.verticalScale = 1.0; // Vertical zoom: >1 = zoomed in (see less history), <1 = zoomed out (see more)
this.draw();
}
draw() {
this.drawBorder();
this.drawGrid();
}
drawBorder() {
this.borderGraphics.clear();
this.borderGraphics.rect(0, 0, this.width, this.height);
this.borderGraphics.stroke({ width: 2, color: 0x606070 });
}
drawGrid() {
this.gridGraphics.clear();
if (!this.showGrid) return;
this.gridGraphics.alpha = 0.3;
const divisions = 10;
const color = 0x4a7a9a;
// Vertical lines
for (let i = 0; i <= divisions; i++) {
const x = (i / divisions) * this.width;
this.gridGraphics.moveTo(x, 0);
this.gridGraphics.lineTo(x, this.height);
this.gridGraphics.stroke({ width: 1, color });
}
// Horizontal lines
for (let i = 0; i <= divisions; i++) {
const y = (i / divisions) * this.height;
this.gridGraphics.moveTo(0, y);
this.gridGraphics.lineTo(this.width, y);
this.gridGraphics.stroke({ width: 1, color });
}
}
update(time, graphIdx) {
this.frameCounter++;
// Add new line every 10 frames
if (this.frameCounter % 10 === 0 && this.lines.length < this.maxLines) {
this.addLine(time, graphIdx);
}
// Scroll existing lines down
this.scrollLines();
// Remove off-screen lines
this.lines = this.lines.filter(line => line.yOffset < this.height + 50);
// Redraw all lines
this.drawLines();
}
addLine(time, graphIdx) {
const line = {
points: [],
yOffset: 0,
color: this.generateColor(time),
};
// Generate sine wave points
const phase = time + (graphIdx * 2);
const freq = 2.0 + Math.sin(time * 0.5 + graphIdx) * 1.0;
for (let i = 0; i < this.pointsPerLine; i++) {
const x = (i / this.pointsPerLine) * this.width;
const normalizedX = (i / this.pointsPerLine) * 2 - 1; // -1 to 1
const y = Math.sin(i * 0.1 * freq + phase) * 30; // Amplitude in pixels
line.points.push({ x, y });
}
this.lines.push(line);
}
scrollLines() {
const speed = this.baseScrollSpeed * this.scrollSpeed;
this.lines.forEach(line => {
line.yOffset += speed;
});
}
setScrollSpeed(speed) {
// Clamp between 0.1 (slow) and 5.0 (fast)
this.scrollSpeed = Math.max(0.1, Math.min(5.0, speed));
}
getScrollSpeed() {
return this.scrollSpeed;
}
setVerticalScale(scale) {
// Clamp between 0.2 (zoomed out, see more history) and 3.0 (zoomed in, see less)
this.verticalScale = Math.max(0.2, Math.min(3.0, scale));
}
getVerticalScale() {
return this.verticalScale;
}
drawLines() {
this.linesGraphics.clear();
for (const line of this.lines) {
if (line.points.length < 2) continue;
// Apply vertical scale to y positions
// Current time is at top (y=0), older data has larger yOffset
const scaledYOffset = line.yOffset * this.verticalScale;
// Start path
const firstPoint = line.points[0];
this.linesGraphics.moveTo(firstPoint.x, firstPoint.y + scaledYOffset);
// Draw line strip
for (let i = 1; i < line.points.length; i++) {
const point = line.points[i];
this.linesGraphics.lineTo(point.x, point.y + scaledYOffset);
}
this.linesGraphics.stroke({ width: 2, color: line.color });
}
}
generateColor(time) {
// Cycle through colors based on time
const hue = (time * 0.1) % 1.0;
const r = Math.floor(Math.abs(Math.sin(hue * Math.PI * 2)) * 255);
const g = Math.floor(Math.abs(Math.sin((hue + 0.33) * Math.PI * 2)) * 255);
const b = Math.floor(Math.abs(Math.sin((hue + 0.66) * Math.PI * 2)) * 255);
return (r << 16) | (g << 8) | b;
}
setGridVisible(visible) {
this.showGrid = visible;
this.drawGrid();
}
resize(x, y, width, height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.container.x = x;
this.container.y = y;
this.draw();
}
getVertexCount() {
return this.lines.reduce((sum, line) => sum + line.points.length, 0);
}
getLineCount() {
return this.lines.length;
}
}
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