Auto return shader hooks

[vietnguyen2358]

Resolves #7994
Addresses #7992

Changes:

• Added auto-return behavior for shader hooks with matching input and return types, allows users to omit return inputs when modifying struct properties in place
• Implemented type checking to ensure auto-return only applies to struct-returning hooks with a single parameter of matching type

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated

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Thank You!

[davepagurek]

This looks great, thanks for making these changes and also adding tests!

[davepagurek]

oh actually it looks like the tests are failing:

 FAIL |unit-tests|  test/unit/visual/cases/webgl.js > WebGL > p5.strands > auto-return for shader hooks > auto-return works with getObjectInputs > matches expected screenshots
TypeError: Cannot read properties of undefined (reading 'position')
 ❯ p5.hookImplementation src/strands/strands_api.js:446:50
    444|             const expectedProp = expectedProperties[i];
    445|             const propName = expectedProp.name;
    446|             const receivedValue = effectiveReturn[propName];
       |                                                  ^
    447|             if (receivedValue === undefined) {
    448|               FES.userError('type error', `You've returned an incomple…
 ❯ eval src/strands/strands_transpiler.js:1078:39
 ❯ src/strands/strands_transpiler.js:1087:20
 ❯ p5.Shader.modify src/strands/p5.strands.js:114:9
 ❯ test/unit/visual/cases/webgl.js:965:48
 ❯ test/unit/visual/visualTest.js:432:13

Possibly the isStructType check is failing? Maybe try adding some logging and then run npm run test test/unit/visual/cases/webgl.js to see what the types are?

[vietnguyen2358]

Sure, I will look into it.