Griffpatch's Scratch Platformer Tutorial

Introduction

• Griffpatch introduces the "Classic Scratch Platformer" project.
• Focus on simple platforming, wall sliding, moving platforms, and level navigation.
• Aim: Create a foundation for personalizing game style.

Getting Started

• Start by remixing the starter project which includes necessary costumes.
• Emphasis on using simple costumes for effective platforming scripts.
• Create a new costume centered on the canvas for proper alignment.
• Rename sprite to "Player."

Creating the Level

• Use backdrops for level creation.
• Draw a straight floor line using the rectangle tool.
• Add stairs and a floating platform for testing.

Gravity Implementation

• Use a forever loop with a "When green flag clicked" block for gravity.
• Create a variable "speed y" to track player's speed.
• Set initial speed to 0 and change it by -1 each loop.
• Adjust player's position using speed y for a realistic fall.

Ground Collisions

• Detect collisions using "IF touching color".
• Move player back by changing y by -speed y to undo the overlap.
• Use repeat until loop to ensure the player is positioned correctly.

Creating the "Fix Overlap" Block

• Custom block to manage player overlap when colliding with ground.
• Use "Run without screen refresh" to improve performance and appearance.

Gravity and Jumping

• Create a "GRAVITY" variable to manage falling speed.
• Implement jumping with "IF up arrow pressed" and set "speed y" to a positive number.

Walking and Horizontal Movement

• Introduce "speed x" for horizontal movement.
• Implement left and right movement with arrow keys.
• Manage acceleration and deceleration with resistance factor.

Horizontal Collisions

• Implement similar collision detection for horizontal movement.
• Use small step movements to detect and manage collisions efficiently.

Fine-tuning the Physics

• Introduce "falling" variable to manage jumping mechanics more effectively.
• Utilize "coyote jump" technique to improve gameplay experience.

Customization of Physics

• Adjust variables like GRAVITY, JUMP FORCE, ACCELERATION, and RESISTANCE to customize game feel.

Conclusion

• Next episode will include multiple screens, sprite vs color collisions, and sloping inclines.
• Future plans: wall jumps and moving platforms.
• Encourage viewers to like, subscribe, and support the channel.

This guide provides a step-by-step process of building a simple yet effective platforming engine in Scratch, offering room for modification and personalization as the game develops.