90 lines
2.5 KiB
Python
90 lines
2.5 KiB
Python
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#!/usr/bin/env python
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""" pygame.examples.liquid
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This example demonstrates a simplish water effect of an
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image. It attempts to create a hardware display surface that
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can use pageflipping for faster updates. Note that the colormap
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from the loaded GIF image is copied to the colormap for the
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display surface.
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This is based on the demo named F2KWarp by Brad Graham of Freedom2000
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done in BlitzBasic. I was just translating the BlitzBasic code to
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pygame to compare the results. I didn't bother porting the text and
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sound stuff, that's an easy enough challenge for the reader :]
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"""
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import pygame as pg
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import os
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from math import sin
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import time
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main_dir = os.path.split(os.path.abspath(__file__))[0]
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def main():
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# initialize and setup screen
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pg.init()
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screen = pg.display.set_mode((640, 480), pg.HWSURFACE | pg.DOUBLEBUF)
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# load image and quadruple
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imagename = os.path.join(main_dir, "data", "liquid.bmp")
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bitmap = pg.image.load(imagename)
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bitmap = pg.transform.scale2x(bitmap)
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bitmap = pg.transform.scale2x(bitmap)
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# get the image and screen in the same format
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if screen.get_bitsize() == 8:
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screen.set_palette(bitmap.get_palette())
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else:
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bitmap = bitmap.convert()
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# prep some variables
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anim = 0.0
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# mainloop
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xblocks = range(0, 640, 20)
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yblocks = range(0, 480, 20)
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stopevents = pg.QUIT, pg.KEYDOWN, pg.MOUSEBUTTONDOWN
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while 1:
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for e in pg.event.get():
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if e.type in stopevents:
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return
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anim = anim + 0.02
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for x in xblocks:
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xpos = (x + (sin(anim + x * 0.01) * 15)) + 20
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for y in yblocks:
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ypos = (y + (sin(anim + y * 0.01) * 15)) + 20
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screen.blit(bitmap, (x, y), (xpos, ypos, 20, 20))
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pg.display.flip()
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time.sleep(0.01)
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if __name__ == "__main__":
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main()
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pg.quit()
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"""BTW, here is the code from the BlitzBasic example this was derived
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from. i've snipped the sound and text stuff out.
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-----------------------------------------------------------------
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; Brad@freedom2000.com
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; Load a bmp pic (800x600) and slice it into 1600 squares
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Graphics 640,480
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SetBuffer BackBuffer()
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bitmap$="f2kwarp.bmp"
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pic=LoadAnimImage(bitmap$,20,15,0,1600)
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; use SIN to move all 1600 squares around to give liquid effect
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Repeat
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f=0:w=w+10:If w=360 Then w=0
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For y=0 To 599 Step 15
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For x = 0 To 799 Step 20
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f=f+1:If f=1600 Then f=0
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DrawBlock pic,(x+(Sin(w+x)*40))/1.7+80,(y+(Sin(w+y)*40))/1.7+60,f
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Next:Next:Flip:Cls
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Until KeyDown(1)
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"""
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