/** * Indicates the transform matrix applied to this document. * * @return Transform matrix. */ protected Matrix getMatrix() { // If the matrix has already been computed then just return the cached value. if (this.matrix != null) return this.matrix; Matrix m = Matrix.IDENTITY; if (this.heading != null) m = m.multiply(Matrix.fromRotationZ(Angle.POS360.subtract(this.heading))); if (this.pitch != null) m = m.multiply(Matrix.fromRotationX(this.pitch)); if (this.roll != null) m = m.multiply(Matrix.fromRotationY(this.roll)); // Apply scaling factor to convert file units to meters. double scale = this.getScale(); m = m.multiply(Matrix.fromScale(scale)); if (this.modelScale != null) m = m.multiply(Matrix.fromScale(this.modelScale)); this.matrix = m; return m; }