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! GLUT Fortran 90 program to draw red light sphere.
subroutine display() bind(c)
use opengl_gl
use opengl_glut
implicit none
call glclear(GL_COLOR_BUFFER_BIT + GL_DEPTH_BUFFER_BIT)
call glcalllist(1)
call glutswapbuffers
end
subroutine gfxinit
use opengl_gl
use opengl_glu
use opengl_glut
implicit none
real(glfloat) :: diffuse(4) = (/1.0, 0.0, 0.0, 1.0/), &
pos(4) = (/1.0, 1.0, 1.0, 0.0/)
call glnewlist(1, GL_COMPILE)
call glutsolidsphere(1.0_gldouble, 20, 20)
call glendlist
call gllightfv(GL_LIGHT0, GL_DIFFUSE, diffuse)
call gllightfv(GL_LIGHT0, GL_POSITION, pos)
call glenable(GL_LIGHTING)
call glenable(GL_LIGHT0)
call glenable(GL_DEPTH_TEST)
call glmatrixmode(GL_PROJECTION)
call gluperspective(40.0_gldouble, 1.0_gldouble, &
1.0_gldouble, 10.0_gldouble)
call glmatrixmode(GL_MODELVIEW)
call glulookat( &
0.0_gldouble, 0.0_gldouble, 5.0_gldouble, &
0.0_gldouble, 0.0_gldouble, 0.0_gldouble, &
0.0_gldouble, 1.0_gldouble, 1.0_gldouble)
call gltranslatef(0.0, 0.0, -1.0)
end
program main
use opengl_glut
implicit none
interface
subroutine display() bind(c)
end subroutine display
end interface
integer :: i
call glutinit()
call glutinitdisplaymode(GLUT_DOUBLE+GLUT_RGB+GLUT_DEPTH)
i = glutcreatewindow('Fortran GLUT sphere')
call gfxinit
call glutdisplayfunc(display)
call glutmainloop
end
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