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stop gap until new function is ready

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This commit is contained in:
Stewart Allen 2021-05-31 22:44:13 -04:00
commit 177517778c
2 changed files with 42 additions and 33 deletions
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20
src/geo/base.js
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@ -323,15 +323,19 @@
let yDelta_b = C.y - B.y;
let xDelta_b = C.x - B.x;
let center = {z: A.z};
if (!xDelta_a) xDelta_a = 0.00000000001; // cheat!
if (!xDelta_b) xDelta_b = 0.00000000001; // cheat!
let cheat = 0;
if (!xDelta_a) { xDelta_a = 0.00000000001; cheat++ } // cheat!
if (!xDelta_b) { xDelta_b = 0.00000000001; cheat++ } // cheat!
if (!yDelta_a) { yDelta_a = 0.00000000001; cheat++ } // cheat!
if (!yDelta_b) { yDelta_b = 0.00000000001; cheat++ } // cheat!
let aSlope = yDelta_a / xDelta_a;
let bSlope = yDelta_b / xDelta_b;
center.x = (aSlope*bSlope*(A.y - C.y) + bSlope*(A.x + B.x) - aSlope*(B.x+C.x) )/(2* (bSlope-aSlope) );
center.y = -1*(center.x - (A.x+B.x)/2)/aSlope + (A.y+B.y)/2;
// if (isNaN(center.x)) {
// console.log({xDelta_a, xDelta_b, aSlope, bSlope});
// }
center.x = (aSlope * bSlope * (A.y - C.y) + bSlope * (A.x + B.x) - aSlope*(B.x+C.x)) / (2 * (bSlope-aSlope));
center.y = (-1 * (center.x - (A.x + B.x) / 2)) / aSlope + ((A.y+B.y) / 2);
if (cheat > 1 || [center.x,center.y].hasNaN()) {
// console.log({xDelta_a, xDelta_b, aSlope, bSlope, cheat});
return undefined;
}
return center;
}
@ -341,7 +345,7 @@
*/
function center2d(A,B,C,rad) {
let center = circleCenter(A,B,C);
if (rad) {
if (center && rad) {
let dx = center.x - A.x;
let dy = center.y - A.y;
center.r = Math.sqrt(dx*dx + dy*dy)