@xtor/cga.js
Version:
Xtor Compute Geometry Algorithm Libary 计算几何算法库
245 lines (244 loc) • 8.38 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.m3 = exports.Mat3 = void 0;
var Vec3_1 = require("./Vec3");
var _Vec = Vec3_1.v3();
var Mat3 = /** @class */ (function () {
function Mat3() {
this.elements = [1, 0, 0, 0, 1, 0, 0, 0, 1];
this.isMat3 = true;
if (arguments.length > 0) {
console.error("Mat3: the constructor no longer reads arguments. use .set() instead.");
}
}
;
Mat3.prototype.set = function (n11, n12, n13, n21, n22, n23, n31, n32, n33) {
var te = this.elements;
te[0] = n11;
te[1] = n21;
te[2] = n31;
te[3] = n12;
te[4] = n22;
te[5] = n32;
te[6] = n13;
te[7] = n23;
te[8] = n33;
return this;
};
Mat3.prototype.identity = function () {
this.set(1, 0, 0, 0, 1, 0, 0, 0, 1);
return this;
};
Mat3.prototype.clone = function () {
return new Mat3().fromArray(this.elements);
};
Mat3.prototype.copy = function (m) {
var te = this.elements;
var me = m.elements;
te[0] = me[0];
te[1] = me[1];
te[2] = me[2];
te[3] = me[3];
te[4] = me[4];
te[5] = me[5];
te[6] = me[6];
te[7] = me[7];
te[8] = me[8];
return this;
};
Mat3.prototype.setFromMat4 = function (m) {
var me = m.elements;
this.set(me[0], me[4], me[8], me[1], me[5], me[9], me[2], me[6], me[10]);
return this;
};
Mat3.prototype.applyToBufferAttribute = function (attribute) {
for (var i = 0, l = attribute.count; i < l; i++) {
_Vec.x = attribute.getX(i);
_Vec.y = attribute.getY(i);
_Vec.z = attribute.getZ(i);
_Vec.applyMat3(this);
attribute.setXYZ(i, _Vec.x, _Vec.y, _Vec.z);
}
return attribute;
};
Mat3.prototype.multiply = function (m) {
return this.multiplyMatrices(this, m);
};
Mat3.prototype.premultiply = function (m) {
return this.multiplyMatrices(m, this);
};
Mat3.prototype.multiplyMatrices = function (a, b) {
var ae = a.elements;
var be = b.elements;
var te = this.elements;
var a11 = ae[0], a12 = ae[3], a13 = ae[6];
var a21 = ae[1], a22 = ae[4], a23 = ae[7];
var a31 = ae[2], a32 = ae[5], a33 = ae[8];
var b11 = be[0], b12 = be[3], b13 = be[6];
var b21 = be[1], b22 = be[4], b23 = be[7];
var b31 = be[2], b32 = be[5], b33 = be[8];
te[0] = a11 * b11 + a12 * b21 + a13 * b31;
te[3] = a11 * b12 + a12 * b22 + a13 * b32;
te[6] = a11 * b13 + a12 * b23 + a13 * b33;
te[1] = a21 * b11 + a22 * b21 + a23 * b31;
te[4] = a21 * b12 + a22 * b22 + a23 * b32;
te[7] = a21 * b13 + a22 * b23 + a23 * b33;
te[2] = a31 * b11 + a32 * b21 + a33 * b31;
te[5] = a31 * b12 + a32 * b22 + a33 * b32;
te[8] = a31 * b13 + a32 * b23 + a33 * b33;
return this;
};
Mat3.prototype.multiplyScalar = function (s) {
var te = this.elements;
te[0] *= s;
te[3] *= s;
te[6] *= s;
te[1] *= s;
te[4] *= s;
te[7] *= s;
te[2] *= s;
te[5] *= s;
te[8] *= s;
return this;
};
Mat3.prototype.determinant = function () {
var te = this.elements;
var a = te[0], b = te[1], c = te[2], d = te[3], e = te[4], f = te[5], g = te[6], h = te[7], i = te[8];
return (a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g);
};
Mat3.prototype.getInverse = function (matrix, throwOnDegenerate) {
if (throwOnDegenerate === void 0) { throwOnDegenerate = false; }
if (matrix && matrix.isMat4) {
console.error("Mat3: .getInverse() no longer takes a Mat4 argument.");
}
var me = matrix.elements, te = this.elements, n11 = me[0], n21 = me[1], n31 = me[2], n12 = me[3], n22 = me[4], n32 = me[5], n13 = me[6], n23 = me[7], n33 = me[8], t11 = n33 * n22 - n32 * n23, t12 = n32 * n13 - n33 * n12, t13 = n23 * n12 - n22 * n13, det = n11 * t11 + n21 * t12 + n31 * t13;
if (det === 0) {
var msg = "Mat3: .getInverse() can't invert matrix, determinant is 0";
if (throwOnDegenerate === true) {
throw new Error(msg);
}
else {
console.warn(msg);
}
return this.identity();
}
var detInv = 1 / det;
te[0] = t11 * detInv;
te[1] = (n31 * n23 - n33 * n21) * detInv;
te[2] = (n32 * n21 - n31 * n22) * detInv;
te[3] = t12 * detInv;
te[4] = (n33 * n11 - n31 * n13) * detInv;
te[5] = (n31 * n12 - n32 * n11) * detInv;
te[6] = t13 * detInv;
te[7] = (n21 * n13 - n23 * n11) * detInv;
te[8] = (n22 * n11 - n21 * n12) * detInv;
return this;
};
Mat3.prototype.transpose = function () {
var tmp, m = this.elements;
tmp = m[1];
m[1] = m[3];
m[3] = tmp;
tmp = m[2];
m[2] = m[6];
m[6] = tmp;
tmp = m[5];
m[5] = m[7];
m[7] = tmp;
return this;
};
Mat3.prototype.getNormalMatrix = function (mat4) {
return this.setFromMat4(mat4)
.getInverse(this)
.transpose();
};
Mat3.prototype.transposeIntoArray = function (r) {
var m = this.elements;
r[0] = m[0];
r[1] = m[3];
r[2] = m[6];
r[3] = m[1];
r[4] = m[4];
r[5] = m[7];
r[6] = m[2];
r[7] = m[5];
r[8] = m[8];
return this;
};
Mat3.prototype.setUvTransform = function (tx, ty, sx, sy, rotation, cx, cy) {
var c = Math.cos(rotation);
var s = Math.sin(rotation);
this.set(sx * c, sx * s, -sx * (c * cx + s * cy) + cx + tx, -sy * s, sy * c, -sy * (-s * cx + c * cy) + cy + ty, 0, 0, 1);
};
Mat3.prototype.scale = function (sx, sy) {
var te = this.elements;
te[0] *= sx;
te[3] *= sx;
te[6] *= sx;
te[1] *= sy;
te[4] *= sy;
te[7] *= sy;
return this;
};
Mat3.prototype.rotate = function (theta) {
var c = Math.cos(theta);
var s = Math.sin(theta);
var te = this.elements;
var a11 = te[0], a12 = te[3], a13 = te[6];
var a21 = te[1], a22 = te[4], a23 = te[7];
te[0] = c * a11 + s * a21;
te[3] = c * a12 + s * a22;
te[6] = c * a13 + s * a23;
te[1] = -s * a11 + c * a21;
te[4] = -s * a12 + c * a22;
te[7] = -s * a13 + c * a23;
return this;
};
Mat3.prototype.translate = function (tx, ty) {
var te = this.elements;
te[0] += tx * te[2];
te[3] += tx * te[5];
te[6] += tx * te[8];
te[1] += ty * te[2];
te[4] += ty * te[5];
te[7] += ty * te[8];
return this;
};
Mat3.prototype.equals = function (matrix) {
var te = this.elements;
var me = matrix.elements;
for (var i = 0; i < 9; i++) {
if (te[i] !== me[i])
return false;
}
return true;
};
Mat3.prototype.fromArray = function (array, offset) {
if (offset === void 0) { offset = 0; }
for (var i = 0; i < 9; i++) {
this.elements[i] = array[i + offset];
}
return this;
};
Mat3.prototype.toArray = function (array, offset) {
if (array === void 0) { array = []; }
if (offset === void 0) { offset = 0; }
var te = this.elements;
array[offset] = te[0];
array[offset + 1] = te[1];
array[offset + 2] = te[2];
array[offset + 3] = te[3];
array[offset + 4] = te[4];
array[offset + 5] = te[5];
array[offset + 6] = te[6];
array[offset + 7] = te[7];
array[offset + 8] = te[8];
return array;
};
return Mat3;
}());
exports.Mat3 = Mat3;
function m3() {
return new Mat3();
}
exports.m3 = m3;