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destrum/src/Components/OrbitAndSpin.cpp

@@ -28,6 +28,11 @@ void OrbitAndSpin::Randomize(uint32_t seed)
     std::uniform_real_distribution<float> spinSpeedDist(0.5f, 6.0f);
     std::uniform_real_distribution<float> phaseDist(0.0f, 6.28318530718f);
 
+    // grow randomness
+    std::uniform_real_distribution<float> growMinDist(0.03f, 0.08f);
+    std::uniform_real_distribution<float> growMaxDist(0.2f, 0.4f);
+    std::uniform_real_distribution<float> growSpeedDist(0.5f, 2.5f);
+
     m_OrbitAxis = RandomUnitVector(rng);
     m_SpinAxis  = RandomUnitVector(rng);
 
@@ -35,6 +40,15 @@ void OrbitAndSpin::Randomize(uint32_t seed)
     m_SpinSpeed  = spinSpeedDist(rng);
     m_OrbitPhase = phaseDist(rng);
 
+    m_GrowMin   = growMinDist(rng);
+    m_GrowMax   = growMaxDist(rng);
+    m_GrowSpeed = growSpeedDist(rng);
+    m_GrowPhase = phaseDist(rng); // random start offset
+
+    // safety: ensure min < max
+    if (m_GrowMin > m_GrowMax)
+        std::swap(m_GrowMin, m_GrowMax);
+
     BuildOrbitBasis();
 }
 
@@ -70,19 +84,27 @@ void OrbitAndSpin::Update()
     // grow (always positive)
     m_GrowPhase += m_GrowSpeed * dt;
 
-    float t = 0.5f * (std::sin(m_GrowPhase) + 1.0f); // 0..1
-    float s = 1.50 + t * 0.70f;                     // 0.05..0.15 (pick what you want)
+    m_GrowPhase += m_GrowSpeed * dt;
 
-    GetTransform().SetLocalScale(glm::vec3(std::sin(m_GrowPhase)));
+    // 0..1
+    float t = 0.5f * (std::sin(m_GrowPhase) + 1.0f);
+
+    // random per-object range
+    float s = glm::mix(m_GrowMin, m_GrowMax, t);
+
+    // respect original scale
+    GetTransform().SetLocalScale(glm::vec3(s));
+
+    // GetTransform().SetLocalScale(glm::vec3(std::sin(m_GrowPhase)));
 
     // material color
-//     auto& mat = GameState::GetInstance().Renderer().getMaterialMutable(m_MaterialID);
-//     mat.baseColor = glm::vec3(
-//         0.5f + 0.5f * std::sin(m_OrbitAngle * 2.0f),
-//         0.5f + 0.5f * std::sin(m_OrbitAngle * 3.0f + 2.0f),
-//         0.5f + 0.5f * std::sin(m_OrbitAngle * 4.0f + 4.0f)
-//     );
-//     GameState::GetInstance().Renderer().updateMaterialGPU(m_MaterialID);
+    auto& mat = GameState::GetInstance().Renderer().getMaterialMutable(m_MaterialID);
+    mat.baseColor = glm::vec3(
+        0.5f + 0.5f * std::sin(m_OrbitAngle * 2.0f),
+        0.5f + 0.5f * std::sin(m_OrbitAngle * 3.0f + 2.0f),
+        0.5f + 0.5f * std::sin(m_OrbitAngle * 4.0f + 4.0f)
+    );
+    GameState::GetInstance().Renderer().updateMaterialGPU(m_MaterialID);
 }
 
 void OrbitAndSpin::Start() {