From 7f2c532d373ca47cbd188eec198dde09873964c7 Mon Sep 17 00:00:00 2001
From: zenoamaro <zenoamaro@gmail.com>
Date: Sun, 30 Jun 2019 02:34:10 +0200
Subject: [PATCH] Terrain eats traces

---
 main.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/main.js b/main.js
index ebec457..7e0f83c 100644
--- a/main.js
+++ b/main.js
@@ -358,11 +358,18 @@ function drawProjectile() {
 }
 
 function fadeTrajectories(amount) {
-  for (let trajectory of trajectories) {
+  for (let i=trajectories.length-1; i>=0; i--) {
+    const trajectory = trajectories[i];
     trajectory.a -= amount;
     trajectory.y -= TRAJECTORY_FLOAT_SPEED;
+
+    if (
+      trajectory.a <= 0 || trajectory.y <= 0 ||
+      isTerrain(terrain, trajectory.x, trajectory.y)
+    ) {
+      trajectories.splice(i, 1);
+    }
   }
-  trajectories = trajectories.filter(x => x.a > 0);
 }
 
 function drawExplosions() {