Notes on Creating a Minimap

Scene Setup

• Prepare a scene with the following elements:
  • Player
  • Enemies
  • Walls

Tagging

• Add an Enemy Tag to all enemy objects.

Minimap Layers

• Create Minimap Layers for organizing the minimap elements:
  • Disable the minimap layer from the main camera by updating its Culling Mask.
  • Change the Environment Layer appropriately.

UI Setup

• Add an Image in the corner of the screen for the minimap display.
• Add a Mask Component to the UI Image.
• Add a Raw Image as a child of the Image.
• Configure the Raw Image as an Overlay and set it to fill based on the camera angle.

Camera Configuration

• Create a new camera:
  • Set the camera to Orthographic.
  • Point the camera directly downward.
  • Adjust the camera size as needed.
  • Modify its Culling Mask to only see minimap objects.

Render Texture

• Create a Render Texture:
  • Edit the Render Texture as a Target Texture in the Secondary Camera.

Sprite Renderer

• Add a Sprite Renderer to the player object and change its layer.
• Add a Sprite Renderer to each enemy object and change their layer and tag.
• Change the tag of the player object as needed.

Connecting Render Texture

• Assign the Render Texture as the texture for the previously created Raw Image.

Minimap Script

• Create a Minimap Script with the following functionalities:
  • Instantiate a game object for the player.
  • Use the Start Method to find every enemy in the scene.
  • In the Update Method:
    • Iterate through enemies:
      • Disable the sprite if the angle between the player's forward vector and the vector to enemy's position exceeds half the camera's angle.
      • Use Raycast to check if enemies are obscured by walls.
  • Rotate the minimap overlay based on the player's rotation.
• Add this script as a component to the minimap camera object.

Conclusion

• This process outlines how to create a functional minimap.
• For more tutorials, check out my other videos and subscribe!