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Prevent movement freezing when touching walls

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💡 Having trouble with character movement getting stuck? Need help with collision detection? 🚀 Get Help Now

MF

MovementFixer_Dev

Posted on August 4, 2025 • Intermediate

🚫 Character gets stuck when touching walls

Hi everyone! I’m having an issue with my game where when my character touches a wall, it gets completely stuck and can’t move anymore. I want to make it so the character can still move even after touching the wall.

The problem is that once the character hits a boundary, the movement freezes completely. Any help would be greatly appreciated! 🙏

CM

CollisionMaster_Pro

Replied 45 minutes later • ⭐ Best Answer

Great question @MovementFixer_Dev! This is a very common issue in Scratch games. The key is to implement proper collision detection that prevents getting stuck. Here are several effective solutions:

🔧 Solution 1: Move-Then-Check Method

The most reliable approach is to move first, then check for collision and undo if needed:

    when flag clicked
forever
// Store current position
set [old x v] to (x position)
set [old y v] to (y position)

// Handle movement input
if <key [right arrow v] pressed?> then
change x by [5]
end
if <key [left arrow v] pressed?> then
change x by [-5]
end
if <key [up arrow v] pressed?> then
change y by [5]
end
if <key [down arrow v] pressed?> then
change y by [-5]
end

// Check for collision and undo if touching wall
if <touching [Wall v]?> then
go to x: (old x) y: (old y)
end
end

⚡ Solution 2: Separate Axis Movement

Handle X and Y movement separately for smoother collision:

    when flag clicked
forever
// X-axis movement
if <key [right arrow v] pressed?> then
change x by [5]
if <touching [Wall v]?> then
change x by [-5]
end
end
if <key [left arrow v] pressed?> then
change x by [-5]
if <touching [Wall v]?> then
change x by [5]
end
end

// Y-axis movement
if <key [up arrow v] pressed?> then
change y by [5]
if <touching [Wall v]?> then
change y by [-5]
end
end
if <key [down arrow v] pressed?> then
change y by [-5]
if <touching [Wall v]?> then
change y by [5]
end
end
end

🎯 Solution 3: Edge Detection with Sliding

Allow sliding along walls for smoother movement:

    when flag clicked
forever
set [move x v] to [0]
set [move y v] to [0]

if <key [right arrow v] pressed?> then
set [move x v] to [5]
end
if <key [left arrow v] pressed?> then
set [move x v] to [-5]
end
if <key [up arrow v] pressed?> then
set [move y v] to [5]
end
if <key [down arrow v] pressed?> then
set [move y v] to [-5]
end

// Try X movement first
change x by (move x)
if <touching [Wall v]?> then
change x by ((-1) * (move x))
end

// Then try Y movement
change y by (move y)
if <touching [Wall v]?> then
change y by ((-1) * (move y))
end
end

🚀 Solution 4: Advanced Collision with Bounce

For more dynamic movement with direction changes:

    when flag clicked
set [speed v] to [5]
set [direction v] to [90]
forever
move (speed) steps
if <touching [Wall v]?> then
move ((-1) * (speed)) steps
turn cw (pick random [45] to [135]) degrees
move (speed) steps
end

// Manual control override
if <key [right arrow v] pressed?> then
point in direction [90]
end
if <key [left arrow v] pressed?> then
point in direction [-90]
end
if <key [up arrow v] pressed?> then
point in direction [0]
end
if <key [down arrow v] pressed?> then
point in direction [180]
end
end

💡 Pro Tips

  • Use smaller movement steps: Smaller increments (2-3 pixels) provide smoother collision
  • Check collision color: Use “touching color” for pixel-perfect collision
  • Add buffer zones: Create invisible collision sprites slightly smaller than visual walls
  • Test thoroughly: Try moving into corners and edges to ensure no stuck spots

Try the move-then-check method first - it’s the most reliable! Let me know if you need help implementing any of these solutions! 😊

MF

MovementFixer_Dev

Replied 1 hour later

@CollisionMaster_Pro This is exactly what I needed! Thank you so much! 🎉

The move-then-check method worked perfectly. My character can now move smoothly without getting stuck on walls!

GT

GameTutor_Sarah

Replied 2 hours later

Great solutions everyone! 🎮 Here are some additional tips for smooth movement:

  • Use velocity variables: Store movement speed in variables for easy adjustment
  • Add acceleration: Gradually increase speed for more natural movement
  • Implement friction: Slowly decrease speed when no keys are pressed
  • Consider diagonal movement: Normalize diagonal movement to prevent faster diagonal speed

These techniques will make your character movement feel much more polished!

VB

Vibelf_Community

Pinned Message • Moderator

🚀 Want to Perfect Your Game Movement?

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  • 🎯 Physics-based movement
  • 🏃 Advanced character controllers
  • 🌊 Smooth camera following
  • ⚡ Performance-optimized collision

📚 Related Topics

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