Lecture: 14 | WATER BOAT GAME IN SCRATCH | GAME DEVELOPMENT | SCRATCH TUTORIAL

Block Programming

18 Jun 202114:41

Summary

TLDRThis tutorial video guides viewers on creating a boat water game in Scratch 3.0. It covers setting up the stage, adding backdrops, and creating variables like score. The video demonstrates how to animate sprites, such as rocks and speed lines, and includes coding for game mechanics like spawning, movement, and collision detection. It also details the boat's controls and game over conditions, concluding with playing the game in full screen mode.

Takeaways

🚀 The video is a tutorial on creating a boat water game in Scratch 3.0.
🔍 It starts with removing the default cat sprite and choosing a blue sky backdrop for the stage.
🎨 The creator adds a second backdrop for the game mode, which is a red color-filled stage.
📝 A 'score' variable is introduced to keep track of the game's progress.
⏱ The score increases by one every second in a loop, starting from zero when the game begins.
🏞️ Border sprites are added and programmed to move to the center of the stage and stay on a back layer.
🗿 Rock sprites are created, cloned, and made to move downwards from a random y-position at the top of the screen.
🌊 Additional sprites representing water waves or speed lines are created by duplicating and modifying the rock sprite's costume.
🛶 A board sprite is added with multiple costumes representing different orientations of the boat.
⛔ The game ends by switching to a 'game over' backdrop if the boat touches rocks or borders, with movement controls tied to arrow keys.
🔄 The boat sprite changes costumes and moves in response to left and right arrow key presses, with a check to ensure it moves in the correct direction.

Q & A

What is the main topic of the video?
-The main topic of the video is to demonstrate how to create a boat water game in Scratch 3.0.
Why does the video start with removing the default cat sprite?
-The video starts with removing the default cat sprite because it is not needed for the boat water game project being demonstrated.
What backdrop does the video suggest to choose for the game?
-The video suggests choosing a blue sky backdrop for the game.
How many backdrops are created in the video for the project?
-Two backdrops are created in the video for the project: one is a blue sky and the other is a game over screen colored red.
What is the purpose of the 'score' variable in the game?
-The 'score' variable is used to keep track of the player's score in the game, which increases every second.
How does the video describe creating border lines for the game?
-The video describes creating border lines by using the 'paint' option to draw rectangles, filling them with green color, and then duplicating and positioning them on the stage.
What sprite is used to represent rocks in the game?
-The video uses a rock sprite found in the Scratch library, resized to 50% of its original size.
How does the rock sprite move in the game?
-The rock sprite moves by creating clones that appear at random positions at the top of the screen and then move downwards.
What is the purpose of the 'speed lines' sprite in the game?
-The 'speed lines' sprite is used to create the illusion of movement or waves in the water for the boat to navigate through.
How does the video handle the boat sprite's interaction with rocks and borders?
-The video uses 'if' statements to check if the boat sprite touches rocks or borders, and if so, it changes the backdrop to 'game over' and stops the game.
What keyboard inputs are used to control the boat sprite's movement?
-The right and left arrow keys are used to control the boat sprite's movement, with the right arrow moving it to the right and the left arrow moving it to the left.
How does the video ensure the boat sprite moves smoothly on the screen?
-The video ensures smooth movement by using 'if else' statements to switch costumes and move the sprite in steps when the arrow keys are pressed.
What happens when the boat sprite reaches the bottom of the screen?
-When the boat sprite reaches the bottom of the screen, it is programmed to delete the clone and return to the top, creating a continuous movement effect.
How does the video encourage viewers to engage with the content?
-The video encourages viewers to subscribe to the channel, like the video, and watch more informative videos for further learning.

Outlines

00:00

🚀 Introduction to Creating a Boat Water Game in Scratch 3.0

The video begins with an introduction to creating a boat water game using Scratch 3.0. The presenter removes the default cat sprite and selects a blue sky backdrop. They then create a second backdrop for the game mode, changing its color to red. A variable for the score is added, and the presenter explains how to set the score to zero when the flag is clicked and increment it every second. The addition of border sprites as game elements is also covered, including creating and positioning them on the stage.

05:02

🌊 Developing Rock Sprites and Movement Mechanics

In this section, the script describes the process of adding and coding rock sprites to move across the screen. The presenter explains how to create clones of the rock sprite that appear at random positions at the top of the screen and move downwards. They detail the use of comparison operators to delete the clone when it reaches a certain y-position, simulating the rock moving out of the screen. The presenter also demonstrates testing the code to ensure the rocks move and clone as expected.

10:03

🏞️ Adding Water Waves and Speed Lines for Visual Effects

The presenter moves on to enhance the game's visual appeal by adding water waves or speed lines. They duplicate the rock sprite and rename it to 'speed lines,' then change its costume to create a wavy pattern. The process of drawing and positioning these lines on the screen is explained. The script also covers how to make these speed lines move across the screen in different positions to simulate water movement, and the presenter runs the game to show the visual effect in action.

⛵️ Implementing the Board Sprite and Control Mechanics

The final part of the script focuses on adding a board sprite and coding its behavior. The presenter uploads different costumes for the board and adds code to switch between them based on user input. They explain how to make the board move to the front layer, position it centrally, and check for collisions with rocks or borders, which trigger a game over state. The movement of the board is controlled by the keyboard's arrow keys, with the right arrow moving the board right and the left arrow moving it left. The presenter concludes by testing the full-screen mode of the game, showcasing the board's smooth movement and collision detection.

Mindmap

Keywords

💡Scratch 3.0

Scratch 3.0 is a programming language and online community directed primarily at children where users can program and share interactive stories, games, and animations. In the context of the video, Scratch 3.0 is the platform used to create a boat water game, indicating the software's educational and creative purpose.

💡Code Area

The code area in Scratch 3.0 is the workspace where users can drag and drop programming blocks to script their sprites' behavior. The script mentions the code area as the place where the user begins to script their game, highlighting the importance of this space in the game development process.

💡Sprite

In the context of Scratch, a sprite represents an object or character in the game that can be programmed to perform various actions. The video script refers to removing the default cat sprite and adding new sprites like borders and rocks, which are essential for the game's mechanics.

💡Backdrop

A backdrop in Scratch is a static image that serves as the background for a project. The script describes choosing a blue sky backdrop and creating a game over backdrop, which are crucial for setting the scene and context of the game.

💡Variable

Variables in programming, including Scratch, are used to store information that can change, such as scores or player positions. The script mentions creating a 'score' variable, which is essential for tracking the player's progress within the game.

💡Event Block

Event blocks in Scratch are used to trigger actions in response to certain events, such as a mouse click or a flag being clicked. The script describes using an 'when flag clicked' event block to initialize the game, which is a common starting point for Scratch projects.

💡Forever Block

The forever block in Scratch is a control block that allows a set of actions to repeat indefinitely. The script uses a forever block to increase the score every second, demonstrating the block's use in creating continuous game mechanics.

💡Clone

In Scratch, cloning is the process of creating a copy of a sprite. The script describes creating clones of the rock sprite to add dynamic elements to the game, such as obstacles that move and challenge the player.

💡Border

Borders in the context of the game described in the script are likely to be the edges of the game area. The script mentions adding border sprites and programming them to reset the game when the boat sprite touches them, which is a common way to define game boundaries.

💡Costume

A costume in Scratch refers to the appearance of a sprite, which can be changed to animate the sprite or to represent different states. The script discusses uploading and switching costumes for the boat sprite to reflect its movement and orientation.

💡Control Block

Control blocks in Scratch are used to manage the flow of a program, such as repeating actions or responding to conditions. The script uses control blocks like 'if' and 'delete this clone' to handle game logic, such as ending the game when the boat hits a rock.

💡Layer

Layers in Scratch determine the order in which sprites are displayed, with sprites on higher layers appearing in front of those on lower layers. The script mentions sending sprites to the back layer to ensure they appear behind other elements, which is important for visual hierarchy in the game.

💡Game Over

In gaming, 'game over' typically signifies the end of a game session, often triggered by the player losing all lives or failing to meet an objective. The script describes a condition where the backdrop switches to 'game over' when the boat sprite touches rocks or borders, indicating the game's end.

Highlights

Introduction of a tutorial on creating a boat water game in Scratch 3.0.

Removing the default cat sprite from the project.

Adding a blue sky backdrop to set the scene.

Creating a game mode backdrop with a red color.

Duplicating and renaming the backdrop for different game stages.

Introducing a score variable for the game.

Setting the initial score to zero when the game starts.

Incrementing the score every second with a forever block.

Adding border sprites to define the game area.

Creating and positioning border lines using the paint editor.

Coding the border sprite to move to the center of the stage.

Adding a rock sprite and setting its movement path.

Creating clones of the rock sprite to add challenge.

Coding the rock sprite to move downwards and delete clones upon reaching the bottom.

Introducing speed lines to enhance the game's visual effects.

Customizing the speed lines costume with random lines for a dynamic look.

Adding a board sprite and coding its movement based on keyboard inputs.

Implementing collision detection between the boat and obstacles to end the game.

Finalizing the game setup with full screen mode for an immersive experience.

Encouraging viewers to subscribe and like for more informative content.