Function mat4_multiply

native/shared/src/renderer/util.rs:74–82

(a: [[f32; 4]; 4], b: [[f32; 4]; 4])

}

pub fn mat4_multiply(a: [[f32; 4]; 4], b: [[f32; 4]; 4]) -> [[f32; 4]; 4] {
    let mut out = [[0.0f32; 4]; 4];
    for col in 0..4 {
        for row in 0..4 {
            out[col][row] = a[0][row]*b[col][0] + a[1][row]*b[col][1] + a[2][row]*b[col][2] + a[3][row]*b[col][3];
        }
    }
    out
}

/// Multiply a column-major 4x4 matrix by a column vector.
pub fn mat4_mul_vec4(m: &[[f32; 4]; 4], v: &[f32; 4]) -> [f32; 4] {