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Added fromRotation and mult methods

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This commit is contained in:
Richard Davey 2020-09-18 17:50:40 +01:00
parent 0013db3747
commit 0e2911c4a5
1 changed files with 147 additions and 0 deletions
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147
src/math/Matrix4.js
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@ -79,6 +79,90 @@ var Matrix4 = new Class({
return this.copy(src);
},
// TODO - Docs
fromRotationXYTranslation: function (rotation, position, translateFirst)
{
var x = position.x;
var y = position.y;
var z = position.z;
var sx = Math.sin(rotation.x);
var cx = Math.cos(rotation.x);
var sy = Math.sin(rotation.y);
var cy = Math.cos(rotation.y);
var a30 = x;
var a31 = y;
var a32 = z;
// Rotate X
var b21 = -sx;
// Rotate Y
var c01 = 0 - b21 * sy;
var c02 = 0 - cx * sy;
var c21 = b21 * cy;
var c22 = cx * cy;
// Translate
if (!translateFirst)
{
// a30 = cy * x + 0 * y + sy * z;
a30 = cy * x + sy * z;
a31 = c01 * x + cx * y + c21 * z;
a32 = c02 * x + sx * y + c22 * z;
}
return this.setValues(
cy,
c01,
c02,
0,
0,
cx,
sx,
0,
sy,
c21,
c22,
0,
a30,
a31,
a32,
1
);
},
setValues: function (m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33)
{
var out = this.val;
out[0] = m00;
out[1] = m01;
out[2] = m02;
out[3] = m03;
out[4] = m10;
out[5] = m11;
out[6] = m12;
out[7] = m13;
out[8] = m20;
out[9] = m21;
out[10] = m22;
out[11] = m23;
out[12] = m30;
out[13] = m31;
out[14] = m32;
out[15] = m33;
return this;
},
/**
* Copy the values of a given Matrix into this Matrix.
*
@ -478,6 +562,69 @@ var Matrix4 = new Class({
return b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
},
// TODO - Docs
multiplyToMat4: function (src, out)
{
var a = this.val;
var b = src.val;
var a00 = a[0];
var a01 = a[1];
var a02 = a[2];
var a03 = a[3];
var a10 = a[4];
var a11 = a[5];
var a12 = a[6];
var a13 = a[7];
var a20 = a[8];
var a21 = a[9];
var a22 = a[10];
var a23 = a[11];
var a30 = a[12];
var a31 = a[13];
var a32 = a[14];
var a33 = a[15];
var b00 = b[0];
var b01 = b[1];
var b02 = b[2];
var b03 = b[3];
var b10 = b[4];
var b11 = b[5];
var b12 = b[6];
var b13 = b[7];
var b20 = b[8];
var b21 = b[9];
var b22 = b[10];
var b23 = b[11];
var b30 = b[12];
var b31 = b[13];
var b32 = b[14];
var b33 = b[15];
return out.setValues(
b00 * a00 + b01 * a10 + b02 * a20 + b03 * a30,
b01 * a01 + b01 * a11 + b02 * a21 + b03 * a31,
b02 * a02 + b01 * a12 + b02 * a22 + b03 * a32,
b03 * a03 + b01 * a13 + b02 * a23 + b03 * a33,
b10 * a00 + b11 * a10 + b12 * a20 + b13 * a30,
b10 * a01 + b11 * a11 + b12 * a21 + b13 * a31,
b10 * a02 + b11 * a12 + b12 * a22 + b13 * a32,
b10 * a03 + b11 * a13 + b12 * a23 + b13 * a33,
b20 * a00 + b21 * a10 + b22 * a20 + b23 * a30,
b20 * a01 + b21 * a11 + b22 * a21 + b23 * a31,
b20 * a02 + b21 * a12 + b22 * a22 + b23 * a32,
b20 * a03 + b21 * a13 + b22 * a23 + b23 * a33,
b30 * a00 + b31 * a10 + b32 * a20 + b33 * a30,
b30 * a01 + b31 * a11 + b32 * a21 + b33 * a31,
b30 * a02 + b31 * a12 + b32 * a22 + b33 * a32,
b30 * a03 + b31 * a13 + b32 * a23 + b33 * a33
);
},
/**
* Multiply this Matrix by the given Matrix.
*