Method set_source

src/renderer.rs:523–532

Store or update a named shader source. If the source changed compared to the previously stored value, the old compiled material is evicted from the cache so the next render pass recompiles automatically. No-ops if the source is unchanged.

(&mut self, name: &str, fragment: &str)

    /// compiled material is evicted from the cache so the next render pass
    /// recompiles automatically. No-ops if the source is unchanged.
    pub fn set_source(&mut self, name: &str, fragment: &str) {
        if let Some(old_source) = self.shader_storage.get(name) {
            if old_source == fragment {
                return; // Unchanged — nothing to do
            }
            // Evict stale material keyed by the old source
            self.materials.remove(old_source.as_str());
        }
        self.shader_storage.insert(name.to_string(), fragment.to_string());
    }

    /// Look up a stored shader source by name.
    pub fn get_source(&self, name: &str) -> Option<&str> {