@tdurtschi/bug/dist/src/core/canvas-ui/renderers/bug/bug-renderer.js

Bug is a simulation that models a weevil walking around in an HTML canvas.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var bug_ui_1 = __importDefault(require("./bug-ui"));
var canvas_helpers_1 = require("../../canvas-helpers");
var Victor = require("victor");
var bugUIs = [];
var GROUND_Y_OFFSET = 0.08;
var CLIMBING_Y_OFFSET = 0.1;
var createNewBug = function (bug) {
    var bugUI = new bug_ui_1.default(bug.id, bug);
    bugUIs[bug.id] = bugUI;
    return bugUI;
};
var getUIBug = function (bug) {
    return bugUIs[bug.id] || createNewBug(bug);
};
exports.default = (function (bug, ctx) {
    var uiBug = getUIBug(bug);
    uiBug.update();
    var climbingYOffset = bug.climbingOn ? Math.ceil(bug.size.y * CLIMBING_Y_OFFSET) : 0;
    var groundYOffset = bug.climbingOn ? 0 : Math.ceil(bug.size.y * GROUND_Y_OFFSET);
    var XOffset = bug.size.x * -1 / 3;
    var direction = bug.direction, size = bug.size;
    var pos = new Victor(bug.pos.x, canvas_helpers_1.fixY(ctx.canvas.height, bug.pos.y));
    ctx.save();
    ctx.translate(pos.x, pos.y);
    window.DEBUG && canvas_helpers_1.circle(ctx, 5);
    if (direction.x > 0) {
        ctx.rotate(-direction.angle());
        ctx.scale(-1, 1);
    }
    else {
        var newDir = direction.clone().multiplyScalarX(-1);
        ctx.rotate(newDir.angle());
    }
    if (shouldFlipY(bug)) {
        ctx.scale(1, -1);
    }
    window.DEBUG && canvas_helpers_1.horizLine(ctx, size.x);
    ctx.drawImage(uiBug.getImage(), XOffset, -size.y + climbingYOffset + groundYOffset, size.x * 10 / 6, size.y);
    ctx.restore();
});
function shouldFlipY(bug) {
    if (bug.climbingOn && bug.climbingOn.branch.flipY) {
        return true;
    }
    return false;
}
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