SFML community forums

Bindings - other languages => Python => Topic started by: KevinZ on September 03, 2011, 09:31:12 pm

Title: Problem with colors
Post by: KevinZ on September 03, 2011, 09:31:12 pm

I'm doing a 2d Rubik's cube application, but I have some problems when changing colors.

This is main.py

Code: [Select]

#!/usr/bin/env python
from PySFML import sf
from cube import Cube

def main():
    window = sf.RenderWindow(sf.VideoMode(800, 600), "Rubik's Cube")

    cube = Cube(0, 0)

    running = True
    while running:
        event = sf.Event()
        while window.GetEvent(event):
            if event.Type == sf.Event.Closed:
                running = False
            elif event.Type == sf.Event.MouseButtonPressed and event.MouseButton.Button == sf.Mouse.Left:
                cube.changeColor(event.MouseButton.X, event.MouseButton.Y)

        window.Clear()
        cube.draw(window)
        window.Display()
   
if __name__ == '__main__':
    main()


this is cube.py

Code: [Select]

from PySFML import sf
import const

class LittleFace(object):
    def __init__(self, x, y, color):
        self.color = color
        self.shape = sf.Shape.Rectangle(x, y, x + const.width, y + const.width, const.colors[color], 1)

    def nextColor(self):
        self.color = (self.color + 1) % 6
        self.shape.SetColor(const.colors[self.color])

    def draw(self, window):
        window.Draw(self.shape)        

class Face(object):
    def __init__(self, x, y, color):
        self.littleFaces = []
        for i in range(9):
            a = x + i%3 * const.width
            b = y + i/3 * const.width
            self.littleFaces.append(LittleFace(a, b, color))

    def draw(self, window):
        for littleFace in self.littleFaces:
            littleFace.draw(window)

    def changeColor(self, x, y):
        xx = x
        yy = y
        self.littleFaces[xx + yy * 3].nextColor()

class Cube(object):
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.faces = [Face(x + const.xs[i], y + const.ys[i], i) for i in range(6)]
   
    def changeColor(self, mx, my):
        xx = (mx - self.x) / const.width
        yy = (my - self.y) / const.width

        if xx < 3 :
            if 3 <= yy and yy < 6:
                self.faces[2].changeColor(xx, yy - 3)
        elif xx < 6:
            if yy < 3:
                self.faces[1].changeColor(xx - 3, yy)
            elif yy < 6:
                self.faces[0].changeColor(xx - 3, yy - 3)
            elif yy < 9:
                self.faces[4].changeColor(xx - 3, yy - 6)
            elif yy < 12:
                self.faces[5].changeColor(xx - 3, yy - 9)
        elif xx < 9:
            if 3 <= yy and yy < 6:
                self.faces[3].changeColor(xx - 6, yy - 3)

    def draw(self, window):
        for face in self.faces:
            face.draw(window)


and this is const.py

Code: [Select]

from PySFML import sf

colors = [sf.Color.Red,
          sf.Color.Green,
          sf.Color.Blue,
          sf.Color.Yellow,
          sf.Color.White,
          sf.Color(255, 127, 0)
         ]

width = 40
d3 = width*3
xs = (d3, d3, 0 , d3*2, d3  , d3  )
ys = (d3, 0 , d3, d3  , d3*2, d3*3)


When I click in a littleFace it should change it color to the next one, but the only group of littleFaces that work properly are the ones that start with white, the other ones change to black (or are not drawn), other colors, or not change when I click.

I don't where the problem is.

I'm using python 2.6.7 and sfml 1.6.

Thanks for your help, and sorry for the bad English.

EDIT: fixed unrelated error

Title: Problem with colors
Post by: KevinZ on September 04, 2011, 05:15:56 am

I made it work

Instead of changing the color in the shape I just create a new shape.

Maybe this is a bug in PySFML?

Title: Problem with colors
Post by: Laurent on September 04, 2011, 09:29:22 am

The default points color (the one that you pass to sf.Shape.Rectangle) is not the global color (the one you pass to SetColor), these two colors are modulated (multiplied) together. You should create your shape with white points and play only with SetColor, if all points have the same color.

Title: Problem with colors
Post by: KevinZ on September 04, 2011, 11:26:11 pm

Thanks for the information.

So I have to create all my rectangles with white.