odin
Version:
Node.js Canvas/WebGL Javascript Game Framework
856 lines (711 loc) • 20.7 kB
JavaScript
if (typeof(define) !== "function") {
var define = require("amdefine")(module);
}
define([
"odin/math/mathf"
],
function(Mathf) {
"use strict";
var sqrt = Math.sqrt;
/**
* @class Vec3
* 3d vector
* @param Number x
* @param Number y
* @param Number z
*/
function Vec3(x, y, z) {
/**
* @property Number x
* @memberof Odin.Vec3
*/
this.x = x || 0;
/**
* @property Number y
* @memberof Odin.Vec3
*/
this.y = y || 0;
/**
* @property Number z
* @memberof Odin.Vec3
*/
this.z = z || 0;
}
Mathf._classes["Vec3"] = Vec3;
/**
* @method clone
* @memberof Odin.Vec3
* returns new instance of this
* @return Vec3
*/
Vec3.prototype.clone = function() {
return new Vec3(this.x, this.y, this.z);
};
/**
* @method copy
* @memberof Odin.Vec3
* copies other
* @param Vec3 other
* @return this
*/
Vec3.prototype.copy = function(other) {
this.x = other.x;
this.y = other.y;
this.z = other.z;
return this;
};
/**
* @method set
* @memberof Odin.Vec3
* sets values of this
* @param Number x
* @param Number y
* @param Number z
* @return this
*/
Vec3.prototype.set = function(x, y, z) {
this.x = x;
this.y = y;
this.z = z;
return this;
};
/**
* @method add
* @memberof Odin.Vec3
* adds other's values to this
* @param Vec3 other
* @return this
*/
Vec3.prototype.add = function(other) {
this.x += other.x;
this.y += other.y;
this.z += other.z;
return this;
};
/**
* @method vadd
* @memberof Odin.Vec3
* adds a and b together saves it in this
* @param Vec3 a
* @param Vec3 b
* @return this
*/
Vec3.prototype.vadd = function(a, b) {
this.x = a.x + b.x;
this.y = a.y + b.y;
this.z = a.z + b.z;
return this;
};
/**
* @method sadd
* @memberof Odin.Vec3
* adds scalar value to this
* @param Number s
* @return this
*/
Vec3.prototype.sadd = function(s) {
this.x += s;
this.y += s;
this.z += s;
return this;
};
/**
* @method sub
* @memberof Odin.Vec3
* subtracts other's values from this
* @param Vec3 other
* @return this
*/
Vec3.prototype.sub = function(other) {
this.x -= other.x;
this.y -= other.y;
this.z -= other.z;
return this;
};
/**
* @method vsub
* @memberof Odin.Vec3
* subtracts b from a saves it in this
* @param Vec3 a
* @param Vec3 b
* @return this
*/
Vec3.prototype.vsub = function(a, b) {
this.x = a.x - b.x;
this.y = a.y - b.y;
this.z = a.z - b.z;
return this;
};
/**
* @method ssub
* @memberof Odin.Vec3
* subtracts this by a scalar value
* @param Number s
* @return this
*/
Vec3.prototype.ssub = function(s) {
this.x -= s;
this.y -= s;
this.z -= s;
return this;
};
/**
* @method mul
* @memberof Odin.Vec3
* muliples this's values by other's
* @param Vec3 other
* @return this
*/
Vec3.prototype.mul = function(other) {
this.x *= other.x;
this.y *= other.y;
this.z *= other.z;
return this;
};
/**
* @method vmul
* @memberof Odin.Vec3
* muliples a and b saves it in this
* @param Vec3 a
* @param Vec3 b
* @return this
*/
Vec3.prototype.vmul = function(a, b) {
this.x = a.x * b.x;
this.y = a.y * b.y;
this.z = a.z * b.z;
return this;
};
/**
* @method smul
* @memberof Odin.Vec3
* muliples this by a scalar value
* @param Number s
* @return this
*/
Vec3.prototype.smul = function(s) {
this.x *= s;
this.y *= s;
this.z *= s;
return this;
};
/**
* @method div
* @memberof Odin.Vec3
* divides this's values by other's
* @param Vec3 other
* @return this
*/
Vec3.prototype.div = function(other) {
var x = other.x,
y = other.y,
z = other.z;
this.x *= x !== 0 ? 1 / x : 0;
this.y *= y !== 0 ? 1 / y : 0;
this.z *= z !== 0 ? 1 / z : 0;
return this;
};
/**
* @method vdiv
* @memberof Odin.Vec3
* divides b from a saves it in this
* @param Vec3 a
* @param Vec3 b
* @return this
*/
Vec3.prototype.vdiv = function(a, b) {
var x = b.x,
y = b.y,
z = b.z;
this.x = x !== 0 ? a.x / x : 0;
this.y = y !== 0 ? a.y / y : 0;
this.z = z !== 0 ? a.z / z : 0;
return this;
};
/**
* @method sdiv
* @memberof Odin.Vec3
* divides this by scalar value
* @param Number s
* @return this
*/
Vec3.prototype.sdiv = function(s) {
s = s === 0 ? 0 : 1 / s;
this.x *= s;
this.y *= s;
this.z *= s;
return this;
};
/**
* @method length
* @memberof Odin.Vec3
* returns the length of this
* @return Number
*/
Vec3.prototype.length = function() {
var x = this.x,
y = this.y,
z = this.z,
lsq = x * x + y * y + z * z;
if (lsq === 1) return 1;
return lsq === 0 ? 0 : sqrt(lsq);
};
/**
* @method lengthSq
* @memberof Odin.Vec3
* returns the squared length of this
* @return Number
*/
Vec3.prototype.lengthSq = function() {
var x = this.x,
y = this.y,
z = this.z;
return x * x + y * y + z * z;
};
/**
* @method setLength
* @memberof Odin.Vec3
* sets this so its magnitude is equal to length
* @param Number length
* @return Vec3
*/
Vec3.prototype.setLength = function(length) {
var x = this.x,
y = this.y,
z = this.z,
l = x * x + y * y + z * z;
if (l === 1) {
this.x *= length;
this.y *= length;
this.z *= length;
return this;
}
l = l > 0 ? 1 / sqrt(l) : 0;
this.x *= l * length;
this.y *= l * length;
this.z *= l * length;
return this;
};
/**
* @method normalize
* @memberof Odin.Vec3
* returns this with a length of 1
* @return this
*/
Vec3.prototype.normalize = function() {
var x = this.x,
y = this.y,
z = this.z,
l = x * x + y * y + z * z;
if (l === 1) return this;
l = l > 0 ? 1 / sqrt(l) : 0;
this.x *= l;
this.y *= l;
this.z *= l;
return this;
};
/**
* @method inverse
* @memberof Odin.Vec3
* returns the inverse of this
* @return this
*/
Vec3.prototype.inverse = function() {
this.x *= -1;
this.y *= -1;
this.z *= -1;
return this;
};
/**
* @method inverseVec
* @memberof Odin.Vec3
* returns the inverse of other
* @param Vec3 other
* @return this
*/
Vec3.prototype.inverseVec = function(other) {
this.x = -other.x;
this.y = -other.y;
this.z = -other.z;
return this;
};
/**
* @method lerp
* @memberof Odin.Vec3
* linear interpolation between this and other by x
* @param Vec3 other
* @param Number x
* @return Vec3
*/
Vec3.prototype.lerp = function(other, x) {
this.x += (other.x - this.x) * x;
this.y += (other.y - this.y) * x;
this.z += (other.z - this.z) * x;
return this;
};
/**
* @method vlerp
* @memberof Odin.Vec3
* linear interpolation between a and b by x
* @param Vec3 a
* @param Vec3 b
* @param Number x
* @return Vec3
*/
Vec3.prototype.vlerp = function(a, b, x) {
var ax = a.x,
ay = a.y,
az = a.z;
this.x = ax + (b.x - ax) * x;
this.y = ay + (b.y - ay) * x;
this.z = az + (b.z - az) * x;
return this;
};
/**
* @method vdot
* @memberof Odin.Vec3
* dot product of two vectors, can be called as a static function Vec3.vdot( a, b )
* @param Vec3 a
* @param Vec3 b
* @return Number
*/
Vec3.vdot = Vec3.prototype.vdot = function(a, b) {
return a.x * b.x + a.y * b.y + a.z * b.z;
};
/**
* @method dot
* @memberof Odin.Vec3
* dot product of this and other vector
* @param Vec3 other
* @return Number
*/
Vec3.prototype.dot = function(other) {
return this.x * other.x + this.y * other.y + this.z * other.z;
};
/**
* @method vcross
* @memberof Odin.Vec3
* cross product between a vector and b vector, can be called as a static function Vec3.vcross( a, b )
* @param Vec3 a
* @param Vec3 b
* @return Number
*/
Vec3.vcross = Vec3.prototype.vcross = function(a, b) {
var ax = a.x,
ay = a.y,
az = a.z,
bx = b.x,
by = b.y,
bz = b.z;
this.x = ay * bz - az * by;
this.y = az * bx - ax * bz;
this.z = ax * by - ay * bx;
return this;
};
/**
* @method cross
* @memberof Odin.Vec3
* cross product between this vector and other
* @param Vec3 other
* @return Number
*/
Vec3.prototype.cross = function(other) {
var ax = this.x,
ay = this.y,
az = this.z,
bx = other.x,
by = other.y,
bz = other.z;
this.x = ay * bz - az * by;
this.y = az * bx - ax * bz;
this.z = ax * by - ay * bx;
return this;
};
/**
* @method min
* @memberof Odin.Vec3
* returns min values from this and other vector
* @param Vec3 other
* @return this
*/
Vec3.prototype.min = function(other) {
var ax = this.x,
ay = this.y,
az = this.z,
bx = other.x,
by = other.y,
bz = other.z;
this.x = bx < ax ? bx : ax;
this.y = by < ay ? by : ay;
this.z = bz < az ? bz : az;
return this;
};
/**
* @method max
* @memberof Odin.Vec3
* returns max values from this and other vector
* @param Vec3 other
* @return this
*/
Vec3.prototype.max = function(other) {
var ax = this.x,
ay = this.y,
az = this.z,
bx = other.x,
by = other.y,
bz = other.z;
this.x = bx > ax ? bx : ax;
this.y = by > ay ? by : ay;
this.z = bz > az ? bz : az;
return this;
};
/**
* @method clamp
* @memberof Odin.Vec3
* clamp values between min and max's values
* @param Vec3 min
* @param Vec3 max
* @return this
*/
Vec3.prototype.clamp = function(min, max) {
var x = this.x,
y = this.y,
z = this.z,
minx = min.x,
miny = min.y,
minz = min.z,
maxx = max.x,
maxy = max.y,
maxz = max.z;
this.x = x < minx ? minx : x > maxx ? maxx : x;
this.y = y < miny ? miny : y > maxy ? maxy : y;
this.z = z < minz ? minz : z > maxz ? maxz : z;
return this;
};
/**
* @method transformMat3
* @memberof Odin.Vec3
* transforms this with Mat3
* @param Mat3 m
* @return this
*/
Vec3.prototype.transformMat3 = function(m) {
var me = m.elements,
x = this.x,
y = this.y,
z = this.z;
this.x = x * me[0] + y * me[3] + z * me[6];
this.y = x * me[1] + y * me[4] + z * me[7];
this.z = x * me[2] + y * me[5] + z * me[8];
return this;
};
/**
* @method transformMat4
* @memberof Odin.Vec3
* transforms this with Mat4
* @param Mat4 m
* @return this
*/
Vec3.prototype.transformMat4 = function(m) {
var me = m.elements,
x = this.x,
y = this.y,
z = this.z;
this.x = x * me[0] + y * me[4] + z * me[8] + me[12];
this.y = x * me[1] + y * me[5] + z * me[9] + me[13];
this.z = x * me[2] + y * me[6] + z * me[10] + me[14];
return this;
};
/**
* @method transformProjection
* @memberof Odin.Vec3
* transforms this with Mat4 projection matrix
* @param Mat4 m
* @return this
*/
Vec3.prototype.transformProjection = function(m) {
var me = m.elements,
x = this.x,
y = this.y,
z = this.z,
d = 1 / (me[3] * x + me[7] * y + me[11] * z + me[15]);
this.x = (me[0] * x + me[4] * y + me[8] * z + me[12]) * d;
this.y = (me[1] * x + me[5] * y + me[9] * z + me[13]) * d;
this.z = (me[2] * x + me[6] * y + me[10] * z + me[14]) * d;
return this;
};
/**
* @method transformQuat
* @memberof Odin.Vec3
* transforms this with Quat
* @param Quat q
* @return this
*/
Vec3.prototype.transformQuat = function(q) {
var x = this.x,
y = this.y,
z = this.z,
qx = q.x,
qy = q.y,
qz = q.z,
qw = q.w,
ix = qw * x + qy * z - qz * y,
iy = qw * y + qz * x - qx * z,
iz = qw * z + qx * y - qy * x,
iw = -qx * x - qy * y - qz * z;
this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
return this;
};
/**
* @method fromVec2
* @memberof Odin.Vec3
* sets values from Vec2
* @param Vec2 v
* @return this
*/
Vec3.prototype.fromVec2 = function(v) {
this.x = v.x;
this.y = v.y;
this.z = 0;
return this;
};
/**
* @method fromVec4
* @memberof Odin.Vec3
* sets position from Vec4
* @param Vec4 v
* @return this
*/
Vec3.prototype.fromVec4 = function(v) {
this.x = v.x;
this.y = v.y;
this.z = v.z;
return this;
};
/**
* @method positionFromMat4
* @memberof Odin.Vec3
* sets position from Mat4
* @param Mat4 m
* @return this
*/
Vec3.prototype.positionFromMat4 = function(m) {
var me = m.elements;
this.x = me[12];
this.y = me[13];
this.z = me[14];
return this;
};
/**
* @method scaleFromMat3
* @memberof Odin.Vec3
* sets this from Mat3 scale
* @param Mat3 m
* @return this
*/
Vec3.prototype.scaleFromMat3 = function(m) {
var me = m.elements,
x = this.set(me[0], me[3], me[6]).length(),
y = this.set(me[1], me[4], me[7]).length(),
z = this.set(me[2], me[5], me[8]).length();
this.x = x;
this.y = y;
this.z = z;
return this;
};
/**
* @method scaleFromMat4
* @memberof Odin.Vec3
* sets this from Mat4 scale
* @param Mat4 m
* @return this
*/
Vec3.prototype.scaleFromMat4 = function(m) {
var me = m.elements,
x = this.set(me[0], me[4], me[8]).length(),
y = this.set(me[1], me[5], me[9]).length(),
z = this.set(me[2], me[6], me[10]).length();
this.x = x;
this.y = y;
this.z = z;
return this;
};
/**
* @memberof Odin.Vec3
* @param Odin.Vec3 other
* @return this
*/
Vec3.prototype.equals = function(other) {
return !(
this.x !== other.x ||
this.y !== other.y ||
this.z !== other.z
);
};
/**
* @method fromJSON
* @memberof Odin.Vec3
* sets values from JSON object
* @param Object json
* @return this
*/
Vec3.prototype.fromJSON = function(json) {
this.x = json.x;
this.y = json.y;
this.z = json.z;
return this;
};
/**
* @method toJSON
* @memberof Odin.Vec3
* returns json object of this
* @return Object
*/
Vec3.prototype.toJSON = function(json) {
json || (json = {});
json._className = "Vec3";
json.x = this.x;
json.y = this.y;
json.z = this.z;
return json;
};
/**
* @method fromArray
* @memberof Odin.Vec3
* sets values from Array object
* @param Array array
* @return this
*/
Vec3.prototype.fromArray = function(array) {
this.x = array[0];
this.y = array[1];
this.z = array[2];
return this;
};
/**
* @method toArray
* @memberof Odin.Vec3
* returns array object of this
* @return Array
*/
Vec3.prototype.toArray = function(array) {
array || (array = []);
array[0] = this.x;
array[1] = this.y;
array[2] = this.z;
return array;
};
/**
* @method toString
* @memberof Odin.Vec3
* returns string of this
* @return String
*/
Vec3.prototype.toString = function() {
return "Vec3( " + this.x + ", " + this.y + ", " + this.z + " )";
};
return Vec3;
}
);