83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
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const World = function(canvas_id_tag){
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this.canvas = document.getElementById(canvas_id_tag);
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this.context = this.canvas.getContext("2d");
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this.clear = function(background_color="white"){
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this.context.beginPath();
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this.context.rect(0,0,640,480);
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this.context.fillStyle = background_color;
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this.context.fill();
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};
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this.newSprite = function(filename, is_pattern=true){
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var mySprite = new Sprite(filename, this, is_pattern=true);
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return mySprite;
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};
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};
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const Sprite = function(filename, world, is_pattern=true){
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switch(filename){
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case undefined: console.log("Unable to load Sprite: filename is undefined"); break;
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case null: console.log("Unable to load Sprite: filename is null"); break;
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case "": console.log("Unable to load sprite: filename is \"\""); break;
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default:
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break;
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}//endswitch
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this.image = new Image();
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this.image.src = filename;
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this.is_pattern = is_pattern;
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const TO_RADIANS = Math.PI/180
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if(is_pattern)
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this.pattern = world.context.createPattern(this.image, "repeat")
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this.draw = function(x, y, w=this.image.width, h=this.image.height){
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world.context.drawImage(this.image, x, y, w, h);
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}
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this.rotate = function(x, y, degrees){
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world.context.save();
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world.context.translate(x,y);
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world.context.rotate(degees * TO_RADIANS);
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world.context.drawImage(
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this.image,
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-(this.image.width/2),
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-(this.image.height/2)
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);
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world.context.restore();
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}
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};
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var isReady = false;
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var world;
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var myCanvas;
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$(document).ready(function(){
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//Initialize
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world = new World("canvas");
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myCanvas = world.canvas;
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world.clear();
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const reddie = world.newSprite("./game/red_tile.png");
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reddie.image.onload = function(){
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reddie.draw(100, 100, 16, 16);
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};
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isReady = true;
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});
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$('#canvas').on('mousedown', function(e){
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const pos = getMousePos(canvas, e);
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mx = pos.x;
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my = pos.y
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console.log(mx, my);
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reddie.draw(mx % 16, my % 16, 16, 16);
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});
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function getMousePos(canvas, evt) {
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var rect = canvas.getBoundingClientRect();
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return {
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x: evt.clientX - rect.left,
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y: evt.clientY - rect.top
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};
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}
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