From e6fcfb4ac90df3e3d9f6079c9db69808e78fbcd6 Mon Sep 17 00:00:00 2001
From: Catalin Mititiuc
Date: Wed, 20 Mar 2024 14:54:19 -0700
Subject: WIP: firing arcs: draw line to edge of map
---
index.js | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
style.css | 1 +
2 files changed, 81 insertions(+), 5 deletions(-)
diff --git a/index.js b/index.js
index ecfba46..f233dbf 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,6 @@
var rect = document.querySelector('rect#map');
var toFixed = n => Number.parseFloat(n).toFixed(2);
+var radToDeg = radians => radians * 180 / Math.PI;
var svgns = "http://www.w3.org/2000/svg",
svg = document.querySelector('svg');
@@ -9,16 +10,81 @@ rect.addEventListener('mousemove', e => {
var x = e.clientX - rect.left; // x position within the element
var y = e.clientY - rect.top; // y position within the element
- console.log(
- 'x: ' + toFixed(x / rect.width * e.target.width.baseVal.valueInSpecifiedUnits) + '"',
- 'y: ' + toFixed(y / rect.height * e.target.height.baseVal.valueInSpecifiedUnits) + '"'
- );
+ // console.log(
+ // 'x: ' + toFixed(x / rect.width * e.target.width.baseVal.valueInSpecifiedUnits) + '"',
+ // 'y: ' + toFixed(y / rect.height * e.target.height.baseVal.valueInSpecifiedUnits) + '"'
+ // );
let aim = document.querySelector('.firing-arc.active');
if (aim) {
aim.setAttributeNS(null, 'x2', `${x / rect.width * e.target.width.baseVal.valueInSpecifiedUnits}in`);
aim.setAttributeNS(null, 'y2', `${y / rect.height * e.target.height.baseVal.valueInSpecifiedUnits}in`);
+
+ let w = aim.x2.baseVal.value - aim.x1.baseVal.value;
+ let h = -(aim.y2.baseVal.value - aim.y1.baseVal.value);
+ let angle = radToDeg(Math.atan(h / w));
+
+ if (w < 0 && h > 0) {
+ angle = 180 - Math.abs(angle);
+ } else if (w < 0 && h < 0) {
+ angle = 180 + Math.abs(angle);
+ } else if (w > 0 && h < 0) {
+ angle = 360 - Math.abs(angle);
+ }
+
+ console.log(`${toFixed(angle)}\u00B0`);
+
+ let [x1, y1, x2, y2] = [aim.x1, aim.y1, aim.x2, aim.y2].map(v => v.baseVal.valueInSpecifiedUnits);
+ let [width, height] = [e.target.width, e.target.height].map(v => v.baseVal.valueInSpecifiedUnits);
+
+ console.log(`(${x2 - x1}, ${y2 - y1})`);
+
+ if (x2 - x1 > 0 && y2 - y1 > 0) {
+ let yWhenXisMax = (width - x1) * (y2 - y1) / (x2 - x1) + y1;
+ let xWhenYisMax = (height - y1) * (x2 - x1) / (y2 - y1) + x1;
+
+ if (xWhenYisMax <= width) {
+ aim.setAttributeNS(null, 'x2', `${xWhenYisMax}in`);
+ aim.setAttributeNS(null, 'y2', `${height}in`);
+ } else {
+ aim.setAttributeNS(null, 'x2', `${width}in`);
+ aim.setAttributeNS(null, 'y2', `${yWhenXisMax}in`);
+ }
+ } else if (x2 - x1 > 0 && y2 - y1 < 0) {
+ let yWhenXisMax = (width - x1) * (y2 - y1) / (x2 - x1) + y1;
+ let xWhenYisZero = (0 - y1) * (x2 - x1) / (y2 - y1) + x1;
+
+ if (xWhenYisZero <= width) {
+ aim.setAttributeNS(null, 'x2', `${xWhenYisZero}in`);
+ aim.setAttributeNS(null, 'y2', `0`);
+ } else {
+ aim.setAttributeNS(null, 'x2', `${width}in`);
+ aim.setAttributeNS(null, 'y2', `${yWhenXisMax}in`);
+ }
+ } else if (x2 - x1 < 0 && y2 - y1 < 0) {
+ let yWhenXisZero = (0 - x1) * (y2 - y1) / (x2 - x1) + y1;
+ let xWhenYisZero = (0 - y1) * (x2 - x1) / (y2 - y1) + x1;
+
+ if (yWhenXisZero >= 0) {
+ aim.setAttributeNS(null, 'x2', `0`);
+ aim.setAttributeNS(null, 'y2', `${yWhenXisZero}in`);
+ } else {
+ aim.setAttributeNS(null, 'x2', `${xWhenYisZero}in`);
+ aim.setAttributeNS(null, 'y2', `0`);
+ }
+ } else {
+ let yWhenXisZero = (0 - x1) * (y2 - y1) / (x2 - x1) + y1;
+ let xWhenYisMax = (height - y1) * (x2 - x1) / (y2 - y1) + x1;
+
+ if (yWhenXisZero <= height) {
+ aim.setAttributeNS(null, 'x2', `0`);
+ aim.setAttributeNS(null, 'y2', `${yWhenXisZero}in`);
+ } else {
+ aim.setAttributeNS(null, 'x2', `${xWhenYisMax}in`);
+ aim.setAttributeNS(null, 'y2', `${height}in`);
+ }
+ }
}
});
@@ -60,6 +126,7 @@ document.querySelector('#set-firing-arc').addEventListener('click', e => {
aim.setAttributeNS(null, 'y1', counter.cy.baseVal.valueAsString);
aim.setAttributeNS(null, 'x2', counter.cx.baseVal.valueAsString);
aim.setAttributeNS(null, 'y2', counter.cy.baseVal.valueAsString);
+ // aim.style.transformOrigin = `${counter.cx.baseVal.valueAsString} ${counter.cy.baseVal.valueAsString}`;
svg.appendChild(aim);
@@ -140,19 +207,27 @@ let getPointCoords = (x, y) => {
let smallArc = document.createElementNS(svgns, 'polygon');
+smallArc.setAttributeNS(null, 'id', 'small-arc');
let smallArcPoints = `${getPointCoords(1, 24)} ${getPointCoords(1, 21)} ${getPointCoords(2, 21)}`;
smallArc.setAttributeNS(null, 'points', smallArcPoints);
svg.appendChild(smallArc);
let medArc = document.createElementNS(svgns, 'polygon');
+medArc.setAttributeNS(null, 'id', 'med-arc');
let medArcPoints = `${getPointCoords(4, 24)} ${getPointCoords(3, 21)} ${getPointCoords(6, 21)}`;
medArc.setAttributeNS(null, 'points', medArcPoints);
svg.appendChild(medArc);
let lrgArc = document.createElementNS(svgns, 'polygon');
+lrgArc.setAttributeNS(null, 'id', 'lrg-arc');
let lrgArcPoints = `${getPointCoords(19, 24)} ${getPointCoords(9, 21)} ${getPointCoords(30, 21)}`;
lrgArc.setAttributeNS(null, 'points', lrgArcPoints);
-svg.appendChild(lrgArc);
\ No newline at end of file
+svg.appendChild(lrgArc);
+
+arc = document.querySelector('#med-arc');
+let [ox, oy] = getPointCoords(4, 24);
+arc.style.transformOrigin = `${ox}px ${oy}px`;
+arc.style.transform = 'rotate(90deg)';
\ No newline at end of file
diff --git a/style.css b/style.css
index c2d0db8..5d3598c 100644
--- a/style.css
+++ b/style.css
@@ -39,6 +39,7 @@ polygon {
line.firing-arc {
stroke: black;
+ /* transform: scale(2); */
}
image#img1 {
--
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