sprite

How to move Sprite in Pygame

As stated by ecline6, bird is the least of your worries at this point. Consider reading this book.. For now, First let’s clean up your code… import pygame import os # let’s address the class a little later.. pygame.init() screen = pygame.display.set_mode((640, 400)) # you only need to call the following once,so pull them out … Read more

Changing the Coordinate System in LibGDX (Java)

If you use a Camera (which you should) changing the coordinate system is pretty simple: camera= new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight()); camera.setToOrtho(true, Gdx.graphics.getWidth(), Gdx.graphics.getHeight()); If you use TextureRegions and/or a TextureAtlas, all you need to do in addition to that is call region.flip(false, true). The reasons we use y-up by default (which you can easily change as … Read more

SpriteKit’s SKPhysicsBody with polygon helper tool

I am looking for the exact same thing, as it turn out I have done a small web app for this purpose. SKPhysicsBody Path Generator as action in example: Update 2015-02-13: script <!DOCTYPE html> <html> <head> <meta charset=”UTF-8″> <title>SpriteKit Tools – SKPhysicsBody Path Generator</title> <link rel=”stylesheet” href=”https://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css”> <style> /* disable responsive */ .container { max-width: … Read more

Fading in/out GameObject

Fading a Sprite is almost the-same as moving GameObject over time except that you modify its alpha instead of it’s position. The three most important stuff about fading an Object are Time.deltaTime, Mathf.Lerp/Color.Lerp and coroutine. You need to understand how these work together. Start coroutine, use Time.deltaTime to increment a variable. That variable is used … Read more

Why is the sprite not rendering in OpenGL?

You have to initialize the model matrix variable glm::mat4 model. The glm API documentation refers to The OpenGL Shading Language specification 4.20. 5.4.2 Vector and Matrix Constructors If there is a single scalar parameter to a vector constructor, it is used to initialize all components of the constructed vector to that scalar’s value. If there … Read more

Is it possible to change sprite colours in Pygame?

If the image is a “mask” image, with a transparent background and a white (255, 255, 255) mask, then you can “tint” the image with ease. Load the image: image = pygame.image.load(imageName) Generate a uniform colored image with an alpha channel and the same size: colorImage = pygame.Surface(image.get_size()).convert_alpha() colorImage.fill(color) Blend the image with maskImage, by … Read more

Move an object every few seconds in Pygame

You can use an Event for this together with pygame.time.set_timer(): pygame.time.set_timer() repeatedly create an event on the event queue set_timer(eventid, milliseconds) -> None Set an event type to appear on the event queue every given number of milliseconds Here’s a simple, complete example. Note how the enemies move every 1000ms sideways, every 3500ms downwards, and … Read more

Detecting collision of two sprites that can rotate [duplicate]

A lot will depend on how you are managing your objects, but… import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.geom.AffineTransform; import java.awt.geom.Area; import java.awt.geom.GeneralPath; import javax.swing.AbstractAction; import javax.swing.ActionMap; import javax.swing.InputMap; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.KeyStroke; import javax.swing.Timer; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public … Read more