102 lines
2.6 KiB
JavaScript
102 lines
2.6 KiB
JavaScript
import GeometryPoint from "../geometry/GeometryPoint.js";
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import GeometryRect from "../geometry/GeometryRect.js";
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export default class RetroSprite
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{
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constructor(image, scale = 1)
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{
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this.image = new Image();
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this.image.src = image;
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this.canvas = document.createElement('canvas');
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this.context = this.canvas.getContext('2d');
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this.position = new GeometryPoint();
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this.scale = scale;
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this.render();
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}
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/**
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* Returns the position of the sprite's center
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*
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* @returns {GeometryPoint}
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*/
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getCenter()
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{
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this.getRect().getCenter();
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}
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setFootPosition(x, y)
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{
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this.position.x = x - this.canvas.width * 0.5;
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this.position.y = y - this.canvas.height;
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}
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getRect()
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{
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return new GeometryRect(this.position.x, this.position.y, this.canvas.width, this.canvas.height);
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}
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getWidth()
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{
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return this.canvas.width;
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}
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getHeight()
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{
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return this.canvas.height;
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}
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getFootHeight()
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{
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return new GeometryPoint(this.position.x, this.position.y + this.getHeight());
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}
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getPositionLeftFoot()
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{
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return new GeometryPoint(this.position.x - this.getWidth() * 0.5, this.position.y);
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}
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getPositionRightFoot()
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{
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return new GeometryPoint(this.position.x + this.getWidth() * 0.5, this.position.y);
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}
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draw(context)
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{
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context.drawImage(this.canvas, this.position.x, this.position.y);
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}
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hasRectCollisionWith(sprite)
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{
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return this.getRect().getRectIntersection(sprite.getRect()) !== null;
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}
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hasCollisionWith(sprite)
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{
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}
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render()
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{
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let canvasTemp = document.createElement('canvas');
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canvasTemp.width = this.image.width * this.scale;
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canvasTemp.height = this.image.height * this.scale;
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let contextTemp = canvasTemp.getContext('2d');
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contextTemp.drawImage(this.image, 0, 0);
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this.canvas.width = this.image.width * this.scale;
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this.canvas.height = this.image.height * this.scale;
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this.context.clearRect(0, 0, this.image.width * this.scale, this.image.height * this.scale);
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for (let y = 0; y < this.image.height; y++) {
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for (let x = 0; x < this.image.width; x++) {
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let pixel = contextTemp.getImageData(x, y, 1, 1).data;
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this.context.globalAlpha = pixel[3] / 255;
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this.context.fillStyle = 'rgb(' + pixel[0] + ',' + pixel[1] + ',' + pixel[2] + ')';
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this.context.fillRect(x * this.scale, y * this.scale, this.scale, this.scale);
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}
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}
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}
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} |