Grass, debugger, noise height gen

src/math.zig

@@ -5,3 +5,10 @@ pub const Quaternion = @import("math/Quaternion.zig").Quaternion;
 pub const Vector2 = @import("math/Vector2.zig").Vector2;
 pub const Vector3 = @import("math/Vector3.zig").Vector3;
 pub const Vector4 = @import("math/Vector4.zig").Vector4;
+
+pub inline fn lerp(a: f32, b: f32, t: f32) f32 {
+    const s = 1.0 - t;
+    return a * t + b * s;
+}
+
+pub const noise2 = @import("math/noise.zig").noise2;