Implement `shadow_threshold` and `soft_shadow` options

mattkimber / gorender

Go implementation of Transrender sprite renderer

MIT License

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Closed ahyangyi closed 8 months ago

ahyangyi commented 8 months ago

This follows (and contains) #8, and generalizes the shadow handling by introducing two new manifest options shadow_threshold and soft_shadow.

shadow_threshold makes the inner product threshold adjustable (rather than hardcoded at 0.0);
soft_shadow introduces a new mode where the shadow strength is in proportion to lighting in excess of shadow_threshold.

Now, the old behavior is replicated with shadow_threshold=-1.0 and soft_shadow=false.

mattkimber commented 8 months ago

I have not forgotten about these, I just need some time to pull the code and test them! Hopefully this week or weekend.