BGE Scripting minimap issue

Question

I am doing minimap and with script it should show You-are-here point with current position the only problem is - the red point is always shown outside of the minimap region, although it is moving correctly. but it should be on the location of a minimap!

what should i add to the simple code? screenshot attached

Answer 1

I've tried your blend file, but it's too heavy to work with. I've made an example file exclusively to answer your question. Download it here.

What you need to create a minimap is understand the concept of a viewport and make both minimap and game map the same size, so the dot position will work as expected.

How It Works

The basic concept of a minimap is:

• Create a Minimap scene, and the minimap object must be the same size as the game map. In this example, both have 200 meters on each side (delimited by the black borders).

• Add the Minimap as overlay scene.

• Set the viewport from Minimap scene's camera. Everything is detailed on the script minimap.py.

# Enable viewport use on map camera
camera.useViewport = True

# Pre process the viewport pixel coordinates
left = getWindowWidth() // 2
bottom = getWindowHeight() // 2
right = getWindowWidth()
top = getWindowHeight()

# Set viewport coordinates
camera.setViewport(left, bottom, right, top)

• Store the player's position and rotation on globalDict.

# Store player position and rotation on globalDict
globalDict['position'] = list(own.worldPosition)
globalDict['rotation'] = list(own.localOrientation.to_euler())

• Update the arrow representation from minimap based on values from globalDict.

# Check if values are present in globalDict
if 'position' in globalDict.keys() and 'rotation' in globalDict.keys():

    # Update arrow's position and rotation
    own.worldPosition = globalDict['position']
    own.localOrientation = globalDict['rotation']

Additional Notes

• Every object from Game scene is a group instance from scene _LibScenery.

• The Minimap is added as overlay scene automatically at game start on object PlayerCollision from scene _LibScenery.