Line drop by pixel

src/gameplay/effects/LineEffect.cpp

@@ -194,9 +194,28 @@ void LineEffect::startLineClear(const std::vector<int>& rows, int gridX, int gri
     clearingRows = rows;
     state = AnimationState::FLASH_WHITE;
     timer = 0.0f;
+    dropProgress = 0.0f;
+    dropBlockSize = blockSize;
+    rowDropTargets.fill(0.0f);
     particles.clear();
     sparks.clear();
     glowPulses.clear();
+
+    std::array<bool, Game::ROWS> rowClearing{};
+    for (int row : rows) {
+        if (row >= 0 && row < Game::ROWS) {
+            rowClearing[row] = true;
+        }
+    }
+
+    int clearedBelow = 0;
+    for (int row = Game::ROWS - 1; row >= 0; --row) {
+        if (rowClearing[row]) {
+            ++clearedBelow;
+        } else if (clearedBelow > 0) {
+            rowDropTargets[row] = static_cast<float>(clearedBelow * blockSize);
+        }
+    }
     
     // Create particles for each clearing row
     for (int row : rows) {
@@ -267,12 +286,16 @@ bool LineEffect::update(float deltaTime) {
             updateParticles(deltaTime);
             updateSparks(deltaTime);
             updateGlowPulses(deltaTime);
+            dropProgress = std::min(1.0f, timer / DROP_DURATION);
             if (timer >= DROP_DURATION) {
                 state = AnimationState::IDLE;
                 clearingRows.clear();
                 particles.clear();
                 sparks.clear();
                 glowPulses.clear();
+                rowDropTargets.fill(0.0f);
+                dropProgress = 0.0f;
+                dropBlockSize = 0;
                 return true; // Effect complete
             }
             break;
@@ -335,6 +358,21 @@ void LineEffect::render(SDL_Renderer* renderer, SDL_Texture* blocksTex, int grid
     }
 }
 
+float LineEffect::getRowDropOffset(int row) const {
+    if (state != AnimationState::BLOCKS_DROP) {
+        return 0.0f;
+    }
+    if (row < 0 || row >= Game::ROWS) {
+        return 0.0f;
+    }
+    float target = rowDropTargets[row];
+    if (target <= 0.0f) {
+        return 0.0f;
+    }
+    float eased = dropProgress * dropProgress * dropProgress;
+    return target * eased;
+}
+
 void LineEffect::renderFlash(int gridX, int gridY, int blockSize) {
     // Create a flashing white effect with varying opacity
     float progress = timer / FLASH_DURATION;