연속 매트 대답. 우리는 사용할 필요가
/math/190111/how-to-check-if-a-point-is-inside-a-rectangle/190373#190373
작동하도록 솔루션을
아래는 작동하지 않습니다
0 <= dot (AB, AM) <= dot (AB, AB) && 0 <= dot (BC, BM) <= dot (BC, BC)
아래 작품
0 <= dot (AB, AM) <= dot (AB, AB) && 0 <= dot (AM, AC) <= dot (AC, AC)
아래에 javascript 콘솔 // Javascript 솔루션을 붙여 넣어 확인하십시오.
var screenWidth = 320;
var screenHeight = 568;
var appHeaderWidth = 320;
var AppHeaderHeight = 65;
var regionWidth = 200;
var regionHeight = 200;
this.topLeftBoundary = {
A: {x: 0, y: AppHeaderHeight},
B: {x: regionWidth, y: AppHeaderHeight},
C: {x: 0, y: regionHeight + AppHeaderHeight},
D: {x: regionWidth, y: regionHeight + AppHeaderHeight}
}
this.topRightBoundary = {
A: {x: screenWidth, y: AppHeaderHeight},
B: {x: screenWidth - regionWidth, y: AppHeaderHeight},
C: {x: screenWidth, y: regionHeight + AppHeaderHeight},
D: {x: screenWidth - regionWidth, y: regionHeight + AppHeaderHeight}
}
this.bottomRightBoundary = {
A: {x: screenWidth, y: screenHeight},
B: {x: screenWidth - regionWidth, y: screenHeight},
C: {x: screenWidth, y: screenHeight - regionHeight},
D: {x: screenWidth - regionWidth, y: screenHeight - regionHeight}
}
this.bottomLeftBoundary = {
A: {x: 0, y: screenHeight},
B: {x: regionWidth, y: screenHeight},
C: {x: 0, y: screenHeight - regionHeight},
D: {x: regionWidth, y: screenHeight - regionHeight}
}
console.log(this.topLeftBoundary);
console.log(this.topRightBoundary);
console.log(this.bottomRightBoundary);
console.log(this.bottomLeftBoundary);
checkIfTapFallsInBoundary = function (region, point) {
console.log("region " + JSON.stringify(region));
console.log("point" + JSON.stringify(point));
var r = region;
var m = point;
function vector(p1, p2) {
return {
x: (p2.x - p1.x),
y: (p2.y - p1.y)
};
}
function dot(u, v) {
console.log("DOT " + (u.x * v.x + u.y * v.y));
return u.x * v.x + u.y * v.y;
}
function pointInRectangle(m, r) {
var AB = vector(r.A, r.B);
var AM = vector(r.A, m);
var AC = vector(r.A, r.C);
var BC = vector(r.B, r.C);
var BM = vector(r.B, m);
console.log("AB " + JSON.stringify(AB));
console.log("AM " + JSON.stringify(AM));
console.log("AM " + JSON.stringify(AC));
console.log("BC " + JSON.stringify(BC));
console.log("BM " + JSON.stringify(BM));
var dotABAM = dot(AB, AM);
var dotABAB = dot(AB, AB);
var dotBCBM = dot(BC, BM);
var dotBCBC = dot(BC, BC);
var dotAMAC = dot(AM, AC);
var dotACAC = dot(AC, AC);
console.log("ABAM " + JSON.stringify(dotABAM));
console.log("ABAB " + JSON.stringify(dotABAB));
console.log("BCBM " + JSON.stringify(dotBCBM));
console.log("BCBC " + JSON.stringify(dotBCBC));
console.log("AMAC " + JSON.stringify(dotAMAC));
console.log("ACAC" + JSON.stringify(dotACAC));
var check = ((0 <= dotABAM && dotABAM <= dotABAB) && (0 <= dotBCBM && dotBCBM <= dotBCBC));
console.log(" first check" + check);
var check = ((0 <= dotABAM && dotABAM <= dotABAB) && (0 <= dotAMAC && dotAMAC <= dotACAC));
console.log("second check" + check);
return check;
}
return pointInRectangle(m, r);
}
//var point = {x: 136, y: 342};
checkIfTapFallsInBoundary(topLeftBoundary, {x: 136, y: 342});
checkIfTapFallsInBoundary(topRightBoundary, {x: 136, y: 274});
checkIfTapFallsInBoundary(bottomRightBoundary, {x: 141, y: 475});
checkIfTapFallsInBoundary(bottomRightBoundary, {x: 131, y: 272});
checkIfTapFallsInBoundary(bottomLeftBoundary, {x: 131, y: 272});
