hub / github.com/Bloom-Engine/engine / mat4_invert

Function mat4_invert

native/shared/src/renderer/util.rs:110–140 · view source on GitHub ↗

(m: [[f32; 4]; 4])

Source from the content-addressed store, hash-verified

108	}
109
110	pub fn mat4_invert(m: [[f32; 4]; 4]) -> [[f32; 4]; 4] {
111	let m = \|r: usize, c: usize\| m[c][r]; // accessor for row-major style
112	let mut inv = [0.0f32; 16];
113	inv[0] = m(1,1)m(2,2)m(3,3) - m(1,1)m(2,3)m(3,2) - m(2,1)m(1,2)m(3,3) + m(2,1)m(1,3)m(3,2) + m(3,1)m(1,2)m(2,3) - m(3,1)m(1,3)m(2,2);
114	inv[4] = -m(1,0)m(2,2)m(3,3) + m(1,0)m(2,3)m(3,2) + m(2,0)m(1,2)m(3,3) - m(2,0)m(1,3)m(3,2) - m(3,0)m(1,2)m(2,3) + m(3,0)m(1,3)m(2,2);
115	inv[8] = m(1,0)m(2,1)m(3,3) - m(1,0)m(2,3)m(3,1) - m(2,0)m(1,1)m(3,3) + m(2,0)m(1,3)m(3,1) + m(3,0)m(1,1)m(2,3) - m(3,0)m(1,3)m(2,1);
116	inv[12] = -m(1,0)m(2,1)m(3,2) + m(1,0)m(2,2)m(3,1) + m(2,0)m(1,1)m(3,2) - m(2,0)m(1,2)m(3,1) - m(3,0)m(1,1)m(2,2) + m(3,0)m(1,2)m(2,1);
117	inv[1] = -m(0,1)m(2,2)m(3,3) + m(0,1)m(2,3)m(3,2) + m(2,1)m(0,2)m(3,3) - m(2,1)m(0,3)m(3,2) - m(3,1)m(0,2)m(2,3) + m(3,1)m(0,3)m(2,2);
118	inv[5] = m(0,0)m(2,2)m(3,3) - m(0,0)m(2,3)m(3,2) - m(2,0)m(0,2)m(3,3) + m(2,0)m(0,3)m(3,2) + m(3,0)m(0,2)m(2,3) - m(3,0)m(0,3)m(2,2);
119	inv[9] = -m(0,0)m(2,1)m(3,3) + m(0,0)m(2,3)m(3,1) + m(2,0)m(0,1)m(3,3) - m(2,0)m(0,3)m(3,1) - m(3,0)m(0,1)m(2,3) + m(3,0)m(0,3)m(2,1);
120	inv[13] = m(0,0)m(2,1)m(3,2) - m(0,0)m(2,2)m(3,1) - m(2,0)m(0,1)m(3,2) + m(2,0)m(0,2)m(3,1) + m(3,0)m(0,1)m(2,2) - m(3,0)m(0,2)m(2,1);
121	inv[2] = m(0,1)m(1,2)m(3,3) - m(0,1)m(1,3)m(3,2) - m(1,1)m(0,2)m(3,3) + m(1,1)m(0,3)m(3,2) + m(3,1)m(0,2)m(1,3) - m(3,1)m(0,3)m(1,2);
122	inv[6] = -m(0,0)m(1,2)m(3,3) + m(0,0)m(1,3)m(3,2) + m(1,0)m(0,2)m(3,3) - m(1,0)m(0,3)m(3,2) - m(3,0)m(0,2)m(1,3) + m(3,0)m(0,3)m(1,2);
123	inv[10] = m(0,0)m(1,1)m(3,3) - m(0,0)m(1,3)m(3,1) - m(1,0)m(0,1)m(3,3) + m(1,0)m(0,3)m(3,1) + m(3,0)m(0,1)m(1,3) - m(3,0)m(0,3)m(1,1);
124	inv[14] = -m(0,0)m(1,1)m(3,2) + m(0,0)m(1,2)m(3,1) + m(1,0)m(0,1)m(3,2) - m(1,0)m(0,2)m(3,1) - m(3,0)m(0,1)m(1,2) + m(3,0)m(0,2)m(1,1);
125	inv[3] = -m(0,1)m(1,2)m(2,3) + m(0,1)m(1,3)m(2,2) + m(1,1)m(0,2)m(2,3) - m(1,1)m(0,3)m(2,2) - m(2,1)m(0,2)m(1,3) + m(2,1)m(0,3)m(1,2);
126	inv[7] = m(0,0)m(1,2)m(2,3) - m(0,0)m(1,3)m(2,2) - m(1,0)m(0,2)m(2,3) + m(1,0)m(0,3)m(2,2) + m(2,0)m(0,2)m(1,3) - m(2,0)m(0,3)m(1,2);
127	inv[11] = -m(0,0)m(1,1)m(2,3) + m(0,0)m(1,3)m(2,1) + m(1,0)m(0,1)m(2,3) - m(1,0)m(0,3)m(2,1) - m(2,0)m(0,1)m(1,3) + m(2,0)m(0,3)m(1,1);
128	inv[15] = m(0,0)m(1,1)m(2,2) - m(0,0)m(1,2)m(2,1) - m(1,0)m(0,1)m(2,2) + m(1,0)m(0,2)m(2,1) + m(2,0)m(0,1)m(1,2) - m(2,0)m(0,2)m(1,1);
129
130	let det = m(0,0)inv[0] + m(0,1)inv[4] + m(0,2)inv[8] + m(0,3)inv[12];
131	if det.abs() < 1e-10 { return IDENTITY_MAT4; }
132	let inv_det = 1.0 / det;
133	let mut out = [[0.0f32; 4]; 4];
134	for col in 0..4 {
135	for row in 0..4 {
136	out[col][row] = inv[col * 4 + row] * inv_det;
137	}
138	}
139	out
140	}
141
142	/// Encode an RGB byte buffer (no alpha) as a PNG. Used by the
143	/// pending-screenshot path so callers can hand us a path and get a

Callers 8

mat4_inverse_localFunction · 0.85

compute_cascade_vpsMethod · 0.85

dispatch_aerial_perspective_lutMethod · 0.85

end_frame_with_sceneMethod · 0.85

begin_mode_3dMethod · 0.85

inv_proj_forFunction · 0.85

world_plane_to_eye_spaceFunction · 0.85

oblique_projFunction · 0.85

Calls

no outgoing calls

Tested by

no test coverage detected