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Pomax
2020-09-19 18:34:03 -07:00
parent ad872f83c5
commit 4c0e71cd4a
234 changed files with 1468 additions and 1376 deletions
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99
docs/chapters/pointvectors3d/vector-lib.js
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@@ -1,71 +1,70 @@
function normalize(v) {
let z = v.z || 0;
var d = Math.sqrt(v.x*v.x + v.y*v.y + z*z);
let r = { x:v.x/d, y:v.y/d };
if (v.z !== undefined) r.z = z/d;
return r;
let z = v.z || 0;
var d = Math.sqrt(v.x * v.x + v.y * v.y + z * z);
let r = { x: v.x / d, y: v.y / d };
if (v.z !== undefined) r.z = z / d;
return r;
}
function dot(v1, v2) {
let z1 = v1.z || 0;
let z2 = v2.z || 0;
return v1.x * v2.x + v1.y * v2.y + z1 * z2;
let z1 = v1.z || 0;
let z2 = v2.z || 0;
return v1.x * v2.x + v1.y * v2.y + z1 * z2;
}
function scale(v, s) {
let r = {
x: s * v.x,
y: s * v.y
}
if (v.z !== undefined) {
r.z = s * v.z
}
return r;
let r = {
x: s * v.x,
y: s * v.y,
};
if (v.z !== undefined) {
r.z = s * v.z;
}
return r;
}
function plus(v1, v2) {
let r = {
x: v1.x + v2.x,
y: v1.y + v2.y
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (v1.z||0) + (v2.z||0);
};
return r;
let r = {
x: v1.x + v2.x,
y: v1.y + v2.y,
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (v1.z || 0) + (v2.z || 0);
}
return r;
}
function minus(v1, v2) {
let r = {
x: v1.x - v2.x,
y: v1.y - v2.y
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (v1.z||0) - (v2.z||0);
};
return r;
let r = {
x: v1.x - v2.x,
y: v1.y - v2.y,
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (v1.z || 0) - (v2.z || 0);
}
return r;
}
function cross(v1, v2) {
if (v1.z === undefined || v2.z === undefined) {
throw new Error(`Cross product is not defined for 2D vectors.`);
}
return {
x: v1.y * v2.z - v1.z * v2.y,
y: v1.z * v2.x - v1.x * v2.z,
z: v1.x * v2.y - v1.y * v2.x
};
if (v1.z === undefined || v2.z === undefined) {
throw new Error(`Cross product is not defined for 2D vectors.`);
}
return {
x: v1.y * v2.z - v1.z * v2.y,
y: v1.z * v2.x - v1.x * v2.z,
z: v1.x * v2.y - v1.y * v2.x,
};
}
function lerp(t, v1, v2) {
let r = {
x: (1-t)*v1.x + t*v2.x,
y: (1-t)*v1.y + t*v2.y
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (1-t)*(v1.z||0) + t*(v2.z||0);
};
return r;
let r = {
x: (1 - t) * v1.x + t * v2.x,
y: (1 - t) * v1.y + t * v2.y,
};
if (v1.z !== undefined || v2.z !== undefined) {
r.z = (1 - t) * (v1.z || 0) + t * (v2.z || 0);
}
return r;
}
export default { normalize, dot, scale, plus, minus, cross, lerp }
export default { normalize, dot, scale, plus, minus, cross, lerp };