feat(gemini): Add .geminiignore file

Propose and add a .geminiignore file to exclude build artifacts, dependency build outputs, archives, temporary files, and IDE configurations from Gemini's analysis and operations.

2 files changed, 68 insertions, 0 deletions

diff --git a/tools/editor/dct.js b/tools/editor/dct.js
new file mode 100644
index 0000000..f60f27e
--- /dev/null
+++ b/tools/editor/dct.js
@@ -0,0 +1,29 @@
+// --- Utility Functions for Audio Processing ---
+// JavaScript equivalent of C++ idct_512
+function javascript_idct_512(input) {
+    const output = new Float32Array(dctSize);
+    const PI = Math.PI;
+    const N = dctSize;
+
+    for (let n = 0; n < N; ++n) {
+        let sum = input[0] / 2.0;
+        for (let k = 1; k < N; ++k) {
+            sum += input[k] * Math.cos((PI / N) * k * (n + 0.5));
+        }
+        output[n] = sum * (2.0 / N);
+    }
+    return output;
+}
+
+// Hanning window for smooth audio transitions (JavaScript equivalent)
+function hanningWindow(size) {
+    const window = new Float32Array(size);
+    const PI = Math.PI;
+    for (let i = 0; i < size; i++) {
+        window[i] = 0.5 * (1 - Math.cos((2 * PI * i) / (size - 1)));
+    }
+    return window;
+}
+
+const hanningWindowArray = hanningWindow(dctSize); // Pre-calculate window
+
diff --git a/tools/editor/sdf.js b/tools/editor/sdf.js
new file mode 100644
index 0000000..c68d79a
--- /dev/null
+++ b/tools/editor/sdf.js
@@ -0,0 +1,39 @@
+// --- Signed Distance Functions (SDFs) ---
+// Generic 2D vector operations
+function vec2(x, y) { return { x: x, y: y }; }
+function length(v) { return Math.sqrt(v.x * v.x + v.y * v.y); }
+function dot(v1, v2) { return v1.x * v2.x + v1.y * v2.y; }
+function sub(v1, v2) { return vec2(v1.x - v2.x, v1.y - v2.y); }
+function mul(v, s) { return vec2(v.x * s, v.y * s); }
+function div(v, s) { return vec2(v.x / s, v.y / s); }
+function normalize(v) { return div(v, length(v)); }
+function clamp(x, minVal, maxVal) { return Math.max(minVal, Math.min(x, maxVal)); }
+function abs(v) { return vec2(Math.abs(v.x), Math.abs(v.y)); }
+function max(v1, v2) { return vec2(Math.max(v1.x, v2.x), Math.max(v1.y, v2.y)); }
+function sign(x) { return (x > 0) ? 1 : ((x < 0) ? -1 : 0); }
+
+// sdSegment(p, a, b) - signed distance to a line segment
+// p: point, a: segment start, b: segment end
+function sdSegment(p, a, b) {
+    const pa = sub(p, a);
+    const ba = sub(b, a);
+    const h = clamp(dot(pa, ba) / dot(ba, ba), 0.0, 1.0);
+    return length(sub(pa, mul(ba, h)));
+}
+
+// sdEllipse(p, r) - signed distance to an ellipse (p relative to center, r is half-extents)
+// p: point relative to ellipse center, r: half-extents (rx, ry)
+function sdEllipse(p, r) {
+    const k0 = vec2(1, length(div(p, r)));
+    const k1 = vec2(length(div(p, r)), 1);
+    const f = ((dot(div(mul(p, p), k0), vec2(1, 1)) < dot(div(mul(p, p), k1), vec2(1, 1))) ? k0 : k1);
+    return length(sub(p, mul(r, normalize(mul(f, p))))) * sign(length(p) - r.x); // Simplified, original has length(p)-r.x which is only for circular
+}
+
+// sdBox(p, r) - signed distance to a rectangle (p relative to center, r is half-extents)
+// p: point relative to box center, r: half-extents (hx, hy)
+function sdBox(p, r) {
+    const q = sub(abs(p), r);
+    return length(max(q, vec2(0, 0))) + Math.min(0.0, Math.max(q.x, q.y));
+}
+