Hi.
Today I converted some old code ( december 2oo4 ) to the actual version
of purebasic. Furthermore, the old code needs some 3rd party opengl user
library. The new code doesnt. You can compile it with the current version
of PureBasic V4.0.
;##################################
;## XMas Tree in some kilobytes
;## for the
;## Pure Winter Contest
;## Dec.2004
;## by
;## benny^weltenkonstrukteur.de
;##
;## Note:
;## This was done in quite a hurry
;## (1 afternoon). In addition I am
;## suffering from a glue. So excuse
;## buggy code.
;##
;## Anyway,
;##
;## Merry X-Mas And a Happy New Year!
;##
;## Converted to PB4.0 on 28.Feb.2007
XIncludeFile "OpenGL.pb"
;##################################
;## Constants, Globals ...
Import "glu32.lib"
gluPerspective(fovy.d,aspect.d,zNear.d,zFar.d) ;sets up a perspective projection matrix
gluLookAt(eyex.d,eyey.d,eyez.d,centerx.d,centery.d,centerz.d,upx.d,upy.d,upz.d) ;defines a viewing transformation
EndImport
Declare InitSnow(snowflake.l)
Structure SnowFlake
state.l ; 0 = Snowing / alive
; 1 = Dying / on ground
transX.f
transY.f
transZ.f
downZ.f
color.f
EndStructure
#WindowWidth = 640
#WindowHeight = 480
#numFLAKES = 200
Global hWnd.l
Dim Flakes.SnowFlake(#numFLAKES)
For z=0 To #numFLAKES-1
InitSnow(z)
Next z
Procedure WindowCallback(Window,Message,wParam,lParam)
Static small
Select Message
Case #WM_SIZE
If small = 1
glViewport_(0, 0, GetSystemMetrics_(#SM_CXSCREEN) , GetSystemMetrics_(#SM_CYSCREEN) )
small = 0
Else
glViewport_(0, 0, #WindowWidth , #WindowHeight )
small = 1
EndIf
Result = DefWindowProc_(Window,Message,wParam,lParam)
Case #WM_DESTROY
DestroyWindow_(Window)
PostQuitMessage_(0)
End
ProcedureReturn 0
Default
Result = DefWindowProc_(Window,Message,wParam,lParam)
EndSelect
ProcedureReturn Result
EndProcedure
Procedure InitSnow(snowflake.l)
Shared Flakes()
Flakes(snowflake)\state = 0
Flakes(snowflake)\transX = 1.0 - (Random(20) / 10)
Flakes(snowflake)\transY = 1.0 - (Random(20) / 10)
Flakes(snowflake)\transZ = 2.4 + Random(2)
Flakes(snowflake)\downZ = Random(10) / 1000 + 0.004
Flakes(snowflake)\color = 0.8
EndProcedure
;##################################
;## Setting the whole thing up.
#Style = #WS_VISIBLE | #WS_SYSMENU | #WS_MAXIMIZEBOX
#StyleEx = #WS_EX_OVERLAPPEDWINDOW
WindowClass.s = "MeinFenster"
wc.WNDCLASSEX
wc\cbSize = SizeOf(WNDCLASSEX)
wc\lpfnWndProc = @WindowCallback()
wc\lpszClassName = @WindowClass
RegisterClassEx_(@wc)
hWnd = CreateWindowEx_( #StyleEx,WindowClass,"xmas tree in 4kb ;-) | pure winter contest 2oo4 entry by benny",#Style,200,200,640,480,0,0,0,0)
pfd.PIXELFORMATDESCRIPTOR
hDC = GetDC_(hWnd)
pfd\nSize = SizeOf(PIXELFORMATDESCRIPTOR)
pfd\nVersion = 1
pfd\dwFlags = #PFD_SUPPORT_OPENGL | #PFD_DOUBLEBUFFER | #PFD_DRAW_TO_WINDOW
pfd\iLayerType = #PFD_MAIN_PLANE
pfd\iPixelType = #PFD_TYPE_RGBA
pfd\cColorBits = 24 ;Colorbuffer
pfd\cDepthBits = 32 ;Depthbuffer
pfd\cAlphaBits = 1
pixformat = ChoosePixelFormat_(hDC, pfd)
SetPixelFormat_(hDC, pixformat, pfd)
hrc = wglCreateContext_(hDC)
wglMakeCurrent_(hDC, hrc)
SwapBuffers_(hDC)
glShadeModel_(#GL_SMOOTH)
glClearColor_(0.1, 0.1, 0.2, 0.1) ;Background color
glMatrixMode_(#GL_PROJECTION)
glLoadIdentity_()
;gluPerspectivef_(50.0, 640/480, 0.1, 100.0)
gluPerspective(50.0, 640/480, 0.1, 100.0)
gluLookAt(0.0, -0.3, 0.2, 0.0, 0.0, -0.6, 0.0, 1.0, 0.0)
glMatrixMode_(#GL_MODELVIEW)
glEnable_(#GL_BLEND)
glDisable_(#GL_DEPTH_TEST)
glBlendFunc_(#GL_SRC_ALPHA, #GL_ONE)
;##################################
;## Main Loop
;Repeat
!l_mainloop:
If (PeekMessage_(msg.MSG, #Null, 0, 0, #PM_REMOVE))
TranslateMessage_(msg)
DispatchMessage_(msg)
Else
glClear_(#GL_COLOR_BUFFER_BIT | #GL_DEPTH_BUFFER_BIT)
glLoadIdentity_() ; Reset Plotter
glTranslatef_(0.0, 0.0, -4.0) ; Move Plotter
glRotatef_(65.0, -1.0, 0.0, 0.0)
glRotatef_(rot.f, 0.0, 0.0, 1.0)
glBegin_(#GL_LINES)
;Grid
glColor4f_(0.8, 0.8, 1.0, 0.8)
For x = -10 To 10 Step 2
tx.f = x / 10
glVertex3f_ (1.0, tx.f, 0.0)
glVertex3f_ (-1.0, tx.f, 0.0)
Next x
For x = -10 To 10 Step 2
tx.f = x / 10
glVertex3f_ (tx.f, 1.0, 0.0)
glVertex3f_ (tx.f, -1.0, 0.0)
Next x
glEnd_()
;Tree
glBegin_(#GL_TRIANGLES)
glColor4f_(0.0, 0.8, 0.0, 0.25)
glVertex3f_(0.0, 0.0, 1.4)
glVertex3f_(-0.8, 0.0 , 0.0)
glVertex3f_(0.8, 0.0, 0.0)
glVertex3f_(0.0, 0.0, 1.4)
glVertex3f_(-0.5, -0.5, 0.0)
glVertex3f_(0.5, 0.5, 0.0)
glVertex3f_(0.0, 0.0, 1.4)
glVertex3f_(-0.5, 0.5, 0.0)
glVertex3f_(0.5, -0.5, 0.0)
glEnd_()
;SnowFlake
For z = 0 To #numFLAKES-1
Flakes(z)\transZ - Flakes(z)\downZ
If Flakes(z)\transZ <=0.0
Flakes(z)\transZ = 0.0
Flakes(z)\state = 1 ; dying
EndIf
If Flakes(z)\state = 1
Flakes(z)\color - 0.01
If Flakes(z)\color < 0.00
InitSnow(z)
EndIf
EndIf
glTranslatef_(Flakes(z)\transX, Flakes(z)\transY, Flakes(z)\transZ)
glBegin_(#GL_LINES)
glColor4f_(1.0, 1.0, 1.0, Flakes(z)\color)
glVertex3f_(0.01, 0.01, 0.0)
glVertex3f_(-0.01, -0.01, 0.0)
glVertex3f_(0.01, -0.01, 0.0)
glVertex3f_(-0.01, 0.01, 0.0)
glVertex3f_(-0.01, 0.01, 0.0)
glVertex3f_(0.01, -0.01, 0.0)
glVertex3f_(0.0, 0.01, 0.01)
glVertex3f_(0.0, -0.01, -0.01)
glVertex3f_(-0.01, 0.0, -0.01)
glVertex3f_(0.01, 0.0, 0.01)
glEnd_()
glTranslatef_(Flakes(z)\transX*(-1), Flakes(z)\transY*(-1), Flakes(z)\transZ*(-1))
Next z
SwapBuffers_(hDC)
rot.f + 0.6
Delay(1)
EndIf
;Until finished = 10
!JMP l_mainloop
End
