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WIP: firing arcs: fix cone angle calculation

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Catalin Constantin Mititiuc 2025-06-16 22:41:28 -07:00
parent 941b51e93a
commit 46717cd9a0
1 changed files with 14 additions and 5 deletions
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19
index.js
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@ -115,14 +115,19 @@ rect.addEventListener('mousemove', e => {
console.log('angle', angle, 'degrees', radToDeg(angle)); console.log('angle', angle, 'degrees', radToDeg(angle));
let smlArcAngle = Math.atan(pointDistanceInInches / (6 * calcY)) * 2; let smlArcAngle = Math.atan(pointDistanceInInches / (6 * calcY));
let medArcAngle = Math.atan((pointDistanceInInches / 2) / calcY);
let lrgArcAngle = Math.atan((21 * pointDistanceInInches) / (6 * calcY));
let arcAngle = lrgArcAngle;
let distance = Math.sqrt((x2px - x1px)**2 + (y2px - y1px)**2); let distance = Math.sqrt((x2px - x1px)**2 + (y2px - y1px)**2);
let newY1 = y2px + (distance * Math.cos(angle)) * Math.atan(smlArcAngle / 2); let newY1 = y2px + (distance * Math.cos(angle)) * Math.tan(arcAngle);
let newY2 = y2px - (distance * Math.cos(angle)) * Math.atan(smlArcAngle / 2); let newY2 = y2px - (distance * Math.cos(angle)) * Math.tan(arcAngle);
let newX1 = x2px + (distance * Math.sin(angle)) * Math.atan(smlArcAngle / 2); let newX1 = x2px + (distance * Math.sin(angle)) * Math.tan(arcAngle);
let newX2 = x2px - (distance * Math.sin(angle)) * Math.atan(smlArcAngle / 2); let newX2 = x2px - (distance * Math.sin(angle)) * Math.tan(arcAngle);
// p.setAttributeNS(null, 'points', `${newX},${newY} ${x1px},${y1px} ${newX},${newY}`); // p.setAttributeNS(null, 'points', `${newX},${newY} ${x1px},${y1px} ${newX},${newY}`);
// p.setAttributeNS(null, 'points', `${x2px},${y2px} ${x1px},${y1px} ${x2px},${y2px}`); // p.setAttributeNS(null, 'points', `${x2px},${y2px} ${x1px},${y1px} ${x2px},${y2px}`);
@ -176,6 +181,10 @@ rect.addEventListener('mousemove', e => {
} }
} }
distance = Math.sqrt((x2 - x1)**2 + (y2 - y1)**2);
newY = y2 + (distance * Math.cos(angle)) * Math.tan(arcAngle);
newX = x2 + (distance * Math.sin(angle)) * Math.tan(arcAngle);
aim.setAttributeNS(null, 'x2', `${newX}in`); aim.setAttributeNS(null, 'x2', `${newX}in`);
aim.setAttributeNS(null, 'y2', `${newY}in`); aim.setAttributeNS(null, 'y2', `${newY}in`);