sprite

How to move a sprite according to an angle in Pygame

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you just need a little basic trig def calculat_new_xy(old_xy,speed,angle_in_radians): new_x = old_xy.X + (speed*math.cos(angle_in_radians)) new_y = old_xy.Y + (speed*math.sin(angle_in_radians)) return new_x, new_y — edit — Here is your code from above edited to work import pygame, math, time screen=pygame.display.set_mode((320,240)) clock=pygame.time.Clock() pygame.init() def calculate_new_xy(old_xy,speed,angle_in_radians): new_x = old_xy[0] + (speed*math.cos(angle_in_radians)) new_y = old_xy[1] + (speed*math.sin(angle_in_radians)) return new_x, … Read more

Pygame: Collision by Sides of Sprite

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There is no function to get sides collision in PyGame. But you could try to use pygame.Rect.collidepoint to test if A.rect.midleft, A.rect.midright, A.rect.midtop, A.rect.midbottom, A.rect.topleft, A.rect.bottomleft , A.rect.topright, A.rect.bottomright are inside B.rect (pygame.Rect). EDIT: Example code. Use arrows to move player and touch enemy. (probably it is not optimal solution) import pygame WHITE = (255,255,255) … Read more

SpriteKit’s SKPhysicsBody with polygon helper tool

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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

Changing the Coordinate System in LibGDX (Java)

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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

Why is the sprite not rendering in OpenGL?

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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

Fading in/out GameObject

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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

How to turn the sprite in pygame while moving with the keys

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See How do I rotate an image around its center using PyGame? for rotating a surface. If you want to rotate an image around a center point (cx, cy) you can just do that: rotated_car = pygame.transform.rotate(car, angle) window.blit(rotated_car, rotated_car.get_rect(center = (cx, cy)) Use pygame.math.Vector2 to store the position and the direction of movement. Change … Read more

How to make sprite jump in java?

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This is basic concept. Your implementation will change depending on the implementation of your engine. The basic idea is the player has a vertical delta which is changed over time by gravity. This effects the sprites vertical speed. This implementation also has a re-bound delta, which allows the sprite to re-bound rather the “stopping” suddenly. … Read more

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