Fixing crash in cube example.

[nicolasnoble]

No description provided.

[coderabbitai]

Walkthrough

The change modifies the CubeScene::frame method in cube.cpp. The Z-axis rotation matrix is now generated by passing the address of the previously computed Y-axis rotation matrix (rot) as the output parameter, rather than discarding the generated matrix. This results in the rot matrix being overwritten with the Z-axis rotation matrix using zero rotation angle, altering the matrix used in subsequent transformations. The multiplication of the transformation matrices remains unchanged.

Changes

File Path	Change Summary
src/mips/psyqo/.../cube.cpp	Modified CubeScene::frame() to pass the address of the Y-axis rotation matrix as output to generateRotationMatrix33 for the Z-axis rotation, replacing the previous no-op call.

Possibly related PRs

• Fix null pointer error in a psyqo cube template #1842: Fixes the CubeScene::frame() method by correctly passing a pointer to the rot matrix when generating the Z-axis rotation matrix, similar to this change.

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• src/mips/psyqo/examples/cube/cube.cpp (1 hunks)

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• src/mips/psyqo/examples/cube/cube.cpp

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

src/mips/psyqo/examples/cube/cube.cpp (1)

153-154: Fixes crash by using the correct function overload with valid output matrix.

This change fixes a crash by properly using the generateRotationMatrix33 function with the output parameter pattern. I notice that the function has two different usage patterns in this code:

1. Return value pattern (lines 147-148): auto matrix = generateRotationMatrix33(angle, axis, trig);
2. Output parameter pattern (line 154): generateRotationMatrix33(outMatrix, angle, axis, trig);

The fix ensures that when using the output parameter pattern, we provide a valid, initialized matrix (rot) to receive the Z-axis rotation.

For improved maintainability, consider:

1. Using a consistent pattern throughout the code
2. Updating the misleading comment on line 153, as the Z-axis rotation matrix is no longer "Empty" but actively used:

- // Generate a Z-axis rotation matrix (Empty, but it's here for your use)
+ // Generate a Z-axis rotation matrix into rot (overwriting the Y-axis rotation)

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📥 Commits

Reviewing files that changed from the base of the PR and between 8cc3aa2 and 12563dc.

📒 Files selected for processing (1)

• src/mips/psyqo/examples/cube/cube.cpp (1 hunks)

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