PerspectiveMatrix()

glm::mat4 Spices::PerspectiveMatrix	(	float	fov,
		float	nearPlane,
		float	farPlane,
		float	aspectRatio )

Calculate Perspective Matrix.

Parameters

[in]	fov	.
[in]	nearPlane	.
[in]	farPlane	.
[in]	aspectRatio	.

Returns

Returns Perspective Matrix.

Definition at line 100 of file Math.cpp.

    {
        const float tanHalfFovy = tan(glm::radians(fov) / 2.0f);
        
        glm::mat4 mat = glm::mat4{ 0.0f };
        mat[0][0] = 1.0f / (aspectRatio * tanHalfFovy);
        mat[1][1] = 1.0f / tanHalfFovy;
        mat[2][2] = farPlane / (farPlane - nearPlane);
        mat[2][3] = 1.0f;
        mat[3][2] = -(farPlane * nearPlane) / (farPlane - nearPlane);
        
        return mat;
    }