| ### Compilation failed: |
| |
| error: 5: 'main' must return: 'vec4', 'float4', or 'half4' |
| void main() { |
| ^^^^^^^^^^^ |
| error: 6: unknown identifier 'sk_FragColor' |
| sk_FragColor.x = cross_length_2d(ah, bh); |
| ^^^^^^^^^^^^ |
| error: 6: unknown identifier 'cross_length_2d' |
| sk_FragColor.x = cross_length_2d(ah, bh); |
| ^^^^^^^^^^^^^^^ |
| error: 7: unknown identifier 'sk_FragColor' |
| sk_FragColor.y = half(cross_length_2d(af, bf)); |
| ^^^^^^^^^^^^ |
| error: 7: unknown identifier 'cross_length_2d' |
| sk_FragColor.y = half(cross_length_2d(af, bf)); |
| ^^^^^^^^^^^^^^^ |
| 5 errors |
