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Added the ability to get the up, right and forward vectors from a given 4x4 matrix #71

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Merged
kooparse merged 1 commit into from
Nov 9, 2025
Merged

Added the ability to get the up, right and forward vectors from a given 4x4 matrix #71

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15 changes: 15 additions & 0 deletions src/mat4.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,21 @@ pub fn Mat4x4(comptime T: type) type {
return Vector3.new(self.data[3][0], self.data[3][1], self.data[3][2]);
}

/// Get the up vector from a given 4x4 matrix
pub fn getUp(self: Self) Vector3 {
return Vector3.new(self.data[0][1], self.data[1][1], self.data[2][1]);
}

/// Get the right vector from a given 4x4 matrix
pub fn getRight(self: Self) Vector3 {
return Vector3.new(self.data[0][0], self.data[1][0], self.data[2][0]);
}

/// Get the right vector from a given 4x4 matrix
pub fn getForward(self: Self) Vector3 {
return Vector3.new(self.data[0][2], self.data[1][2], self.data[2][2]);
}

/// Construct a 4x4 matrix from given axis and angle (in degrees).
pub fn fromRotation(angle_in_degrees: T, axis: Vector3) Self {
var result = Self.identity();
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