)

    glDetachShader(shaderProgram, vertShader)
    glDetachShader(shaderProgram, fragShader)
    
    return shaderProgram    }

func obtainUniform(_ shaderProgram: GLuint, _ uniformName: String) -> GLint {
    let uniformLocation = glGetUniformLocation(shaderProgram, uniformName)

    if uniformLocation == -1 {
        return -1
    }
    
    return uniformLocation
}

func setXYZUniform(_ shaderProgram: GLuint, _ unifromName: String, _ x: GLfloat, _ y: GLfloat, _ z: GLfloat) {
    let xyzLocation = obtainUniform(shaderProgram, unifromName)
    glUniform3f(xyzLocation, x, y, z)
}

func setMat4Uniform(_ shaderProgram: GLuint, _ unifromName: String, _ mat4x4: [GLfloat]) {
    let mat4Location = obtainUniform(shaderProgram, unifromName)
    glUniformMatrix4fv(mat4Location, 1, GLboolean(GL_FALSE), mat4x4)  
}

func set1fUniform(_ shaderProgram: GLuint, _ unifromName: String, _ v: GLfloat) {
    let location = obtainUniform(shaderProgram, unifromName)
    glUniform1f(location, v)
}

func set3fUniform(_ shaderProgram: GLuint, _ unifromName: String, _ v1: GLfloat, _ v2: GLfloat,  _ v3: GLfloat) {
    let location = obtainUniform(shaderProgram, unifromName)
    glUniform3f(location, v1, v2, v3)
}
  
func setVec3Uniform(_ shaderProgram: GLuint, _ unifromName: String, _ xyz: [GLfloat]) {
    let vec3Location = obtainUniform(shaderProgram, unifromName)
    glUniform3f(vec3Location, xyz[0], xyz[1], xyz[2])
}

func set1iUniform(_ shaderProgram: GLuint, _ unifromName: String, _ v: GLint) {
    let location = obtainUniform(shaderProgram, unifromName)
    glUniform1i(location, v)
}

}