matrix4x4 QML Basic Type
A matrix4x4 type is a 4-row and 4-column matrix
A matrix4x4 type has sixteen values, each accessible via the properties m11 through m44 in QML (in row/column order). Values of this type can be composed with the Qt.matrix4x4() function. Each attribute in a matrix4x4 is stored as a real (single-precision on ARM, double-precision on x86).
The matrix4x4 type has the following idempotent functions which can be invoked in QML:
| Function Signature | Description | Example | 
|---|---|---|
| matrix4x4 times(matrix4x4 other) | Returns the matrix4x4 result of multiplying thismatrix4x4 with theothermatrix4x4 | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.matrix4x4(4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19); var c = a.times(b); console.log(c.toString()); // QMatrix4x4(120, 130, 140, 150, 280, 306, 332, 358, 440, 482, //524, 566, 600, 658, 716, 774) | 
| vector4d times(vector4d vector) | Returns the vector4d result of transforming the vectoraccording tothismatrix4x4 with the matrix applied pre-vector | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.vector4d(5,6,7,8); var c = a.times(b); console.log(c.toString()); // QVector4D(70, 174, 278, 382) | 
| vector3d times(vector3d vector) | Returns the vector3d result of transforming the vectoraccording tothismatrix4x4 with the matrix applied pre-vector | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.vector3d(5,6,7); var c = a.times(b); console.log(c.toString()); // QVector3D(0.155556, 0.437037, 0.718518) | 
| matrix4x4 times(real factor) | Returns the matrix4x4 result of multiplying thismatrix4x4 with the scalarfactor | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = 4.48; var c = a.times(b); console.log(c.toString()); // QMatrix4x4(4.48, 8.96, 13.44, 17.92, 22.4, 26.88, 31.36, 35.84, // 40.32, 44.8, 49.28, 53.76, 58.24, 62.72, 67.2, 71.68) | 
| matrix4x4 plus(matrix4x4 other) | Returns the matrix4x4 result of the addition of thismatrix4x4 with theothermatrix4x4 | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.matrix4x4(5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20); var c = a.plus(b); console.log(c.toString()); // QMatrix4x4(6, 8, 10, 12, 14, 16, 18, 20, 22, // 24, 26, 28, 30, 32, 34, 36) | 
| matrix4x4 minus(matrix4x4 other) | Returns the matrix4x4 result of the subtraction of othermatrix4x4 fromthismatrix4x4 | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.matrix4x4(5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20); var c = a.minus(b); console.log(c.toString()); // QMatrix4x4(-4, -4, -4, -4, -4, -4, -4, -4, -4, // -4, -4, -4, -4, -4, -4, -4) | 
| vector4d row(int which) | Returns the vector4d row of thisspecified bywhich. Note: thewhichis 0-based access into the matrix. | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.vector4d(a.m21, a.m22, a.m23, a.m24); var c = a.row(2); // zero based access! so not equal to b console.log(b.toString() + " " + c.toString()); // QVector4D(5, 6, 7, 8) QVector4D(9, 10, 11, 12) | 
| vector4d column(int which) | Returns the vector4d column of thisspecified bywhich. Note: thewhichis 0-based access into the matrix. | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.vector4d(a.m12, a.m22, a.m32, a.m42); var c = a.column(2); // zero based access! so not equal to b console.log(b.toString() + " " + c.toString()); // QVector4D(2, 6, 10, 14) QVector4D(3, 7, 11, 15) | 
| real determinant() | Returns the determinant of thismatrix4x4 | var a = Qt.matrix4x4(1,0,0,0,0,2,0,0,0,0,3,0,100,200,300,1); var b = a.determinant(); console.log(b); // 6 | 
| matrix4x4 inverted() | Returns the inverse of thismatrix4x4 if it exists, else the identity matrix. | var a = Qt.matrix4x4(1,0,0,0,0,2,0,0,0,0,3,0,100,200,300,1); var b = a.inverted(); console.log(b.toString()); // QMatrix4x4(1, 0, 0, 0, 0, 0.5, 0, 0, 0, 0, 0.333333, 0, -100, // -100, -100, 1) | 
| matrix4x4 transposed() | Returns the transpose of thismatrix4x4 | var a = Qt.matrix4x4(1,0,0,0,0,2,0,0,0,0,3,0,100,200,300,1); var b = a.transposed(); console.log(b.toString()); // QMatrix4x4(1, 0, 0, 100, 0, 2, 0, 200, 0, 0, 3, 300, 0, 0, 0, 1) | 
| bool fuzzyEquals(matrix4x4 other, real epsilon) | Returns true if thismatrix4x4 is approximately equal to theothermatrix4x4. The approximation will be true if each attribute ofthisis withinepsilonof the respective attribute ofother. Note thatepsilonis an optional argument, the defaultepsilonis 0.00001. | var a = Qt.matrix4x4(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16); var b = Qt.matrix4x4(1.0001,2.0001,3.0002,4.0003,5.0001,6.0002, 7.0002,8.0004, 9.0001,10.0003, 11.0003,12.0004,13.0001, 14.0002,15.0003,16.0004); var c = a.fuzzyEquals(b); // default epsilon var d = a.fuzzyEquals(b, 0.005); // supplied epsilon console.log(c + " " + d); // false true | 
This basic type is provided by the QtQuick import.
See also QML Basic Types.