Module rendering/shaders/glsl-lib

Shared GLSL helper snippets injected into the Points / Lines / GSplats shaders.

Keeping the sanitize helpers in one place lets us:

• change the sanitize policy once (e.g., to also reject denormals) without hunting through three shader source strings;
• test the GLSL-string content with a single regex assertion;
• make the intent explicit at the call site.

Helpers:

• isInvalidFloat(v) — true if v is NaN or +/-Inf.
• sanitizePositive(v, fb) — returns v if v > 0 and finite, else fb.
• sanitizeNonNegative(v, fb) — returns v if v ≥ 0 and finite, else fb.

Inject by prepending GLSL_SANITIZE_FUNCTIONS to a shader source string before the main() block:

const vertexShader = `
  uniform vec2 uResolution;
  ${GLSL_SANITIZE_FUNCTIONS}
  void main() { ... }
`;
Copy