world-scale-ar-3

world-scale-ar-class.swift

internal extension matrix_float4x4 {
    func rotationAroundY(radians: Float) -> matrix_float4x4 {
        var matrix: matrix_float4x4 = self
        
        matrix.columns.0.x = cos(radians)
        matrix.columns.0.z = -sin(radians)
        
        matrix.columns.2.x = sin(radians)
        matrix.columns.2.z = cos(radians)
        
        return matrix.inverse
    }
    
    func translationMatrix(_ translation : vector_float4) -> matrix_float4x4 {
        var matrix: matrix_float4x4 = self
        matrix.columns.3 = translation
        return matrix
    }
}