just_another_tree/js/technical/canvas.js
2024-03-03 11:53:50 +00:00

88 lines
2.3 KiB
JavaScript

var canvas;
var ctx;
window.addEventListener("resize", (_=>resizeCanvas()));
function retrieveCanvasData() {
let treeCanv = document.getElementById("treeCanvas")
let treeTab = document.getElementById("treeTab")
if (treeCanv===undefined||treeCanv===null) return false;
canvas = treeCanv;
ctx = canvas.getContext("2d");
return true;
}
function resizeCanvas() {
if (!retrieveCanvasData()) return
canvas.width = 0;
canvas.height = 0;
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
drawTree();
}
var colors_theme
function drawTree() {
if (!retrieveCanvasData()) return;
ctx.clearRect(0, 0, canvas.width, canvas.height);
for (layer in layers){
if (tmp[layer].layerShown == true && tmp[layer].branches){
for (branch in tmp[layer].branches)
{
drawTreeBranch(layer, tmp[layer].branches[branch])
}
}
drawComponentBranches(layer, tmp[layer].upgrades, "upgrade-")
drawComponentBranches(layer, tmp[layer].buyables, "buyable-")
drawComponentBranches(layer, tmp[layer].clickables, "clickable-")
}
}
function drawComponentBranches(layer, data, prefix) {
for(id in data) {
if (data[id].branches) {
for (branch in data[id].branches)
{
drawTreeBranch(id, data[id].branches[branch], prefix + layer + "-")
}
}
}
}
function drawTreeBranch(num1, data, prefix) { // taken from Antimatter Dimensions & adjusted slightly
let num2 = data
let color_id = 1
let width = 15
if (Array.isArray(data)){
num2 = data[0]
color_id = data[1]
width = data[2] || width
}
if(typeof(color_id) == "number")
color_id = colors_theme[color_id]
if (prefix) {
num1 = prefix + num1
num2 = prefix + num2
}
if (document.getElementById(num1) == null || document.getElementById(num2) == null)
return
let start = document.getElementById(num1).getBoundingClientRect();
let end = document.getElementById(num2).getBoundingClientRect();
let x1 = start.left + (start.width / 2) + document.body.scrollLeft;
let y1 = start.top + (start.height / 2) + document.body.scrollTop;
let x2 = end.left + (end.width / 2) + document.body.scrollLeft;
let y2 = end.top + (end.height / 2) + document.body.scrollTop;
ctx.lineWidth = width;
ctx.beginPath();
ctx.strokeStyle = color_id
ctx.moveTo(x1, y1);
ctx.lineTo(x2, y2);
ctx.stroke();
}