import sys, time, math, os
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
from OpenGL.GL.ARB.multitexture import *
from dmsgl import *

if hasattr(os,'uname') and os.uname()[0] == 'Darwin':
    import multitex
    glActiveTextureARB = multitex.activetexture

startdir = os.getcwd()


camera = PerspCamera()
camera.moveBackward(12)
light = Light()
light.position = [1, 3, 2, 0]
material1 = Material(diffuse=Color.White)
xform = SimpleTransform(rotateAxis=[1, -1, 0.1])
rocktex = Texture2D('rock.jpg', minFilter=GL_LINEAR_MIPMAP_LINEAR)
reflectionMap = Texture2D('flowers.tif')

addTex = False

def drawCylinder():
    glPushMatrix()
    xform.apply()
    glRotatef(-90, 1, 0, 0)
    glTranslatef(0, 0, -3)
    gluCylinder(quadric, 1.5, 1.0, 6.0, 16, 1)
    glPopMatrix()

def draw():
    Color.X11['DeepSkyBlue'].clear()
    camera.apply()
    light.apply()

    material1.apply()
    glActiveTextureARB(GL_TEXTURE0_ARB)
    rocktex.apply()
    glActiveTextureARB(GL_TEXTURE1_ARB)
    glEnable(GL_TEXTURE_GEN_S)
    glEnable(GL_TEXTURE_GEN_T)
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP)
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP)
    reflectionMap.apply()
    drawCylinder()
    glDisable(GL_TEXTURE_GEN_S)
    glDisable(GL_TEXTURE_GEN_T)
    reflectionMap.disable()
    glActiveTextureARB(GL_TEXTURE0_ARB)
    rocktex.disable()

    glutSwapBuffers()


def keyboard(key, x, y):
    global cameraVelDist, addTex
    if key == chr(27):
        sys.exit(0)
    elif key == '.':
        cameraVelDist += 4
    elif key == ',':
        cameraVelDist += -4
    elif key == ' ':
        addTex = not addTex

def keyboardUp(key, x, y):
    global cameraVelDist
    if key == chr(27):
        sys.exit(0)
    elif key == '.':
        cameraVelDist -= 4
    elif key == ',':
        cameraVelDist -= -4

def specialkey(key,x,y):
    global cameraVelPitch, cameraVelTurn
    if key == GLUT_KEY_LEFT:
        cameraVelTurn += 90
    elif key == GLUT_KEY_RIGHT:
        cameraVelTurn -= 90
    elif key == GLUT_KEY_UP:
        cameraVelPitch += 90
    elif key == GLUT_KEY_DOWN:
        cameraVelPitch -= 90

def specialkeyUp(key,x,y):
    global cameraVelPitch, cameraVelTurn
    if key == GLUT_KEY_LEFT:
        cameraVelTurn -= 90
    elif key == GLUT_KEY_RIGHT:
        cameraVelTurn += 90
    elif key == GLUT_KEY_UP:
        cameraVelPitch -= 90
    elif key == GLUT_KEY_DOWN:
        cameraVelPitch += 90


cameraVelPitch = 0.0
cameraVelTurn = 0.0
cameraVelDist = 0.0
prevTime = time.time()

def update():
    global cameraVelPitch, cameraVelTurn, cameraVelDist
    global prevTime
    t = time.time()
    dt = t - prevTime
    prevTime = t
    camera.pitch(cameraVelPitch * dt)
    camera.turn(cameraVelTurn * dt)
    camera.moveForward(cameraVelDist * dt)
    xform.rotateAngle += dt * 30
    glutPostRedisplay()

glutInit([])
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(400,400)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutKeyboardUpFunc(keyboardUp)
glutSpecialFunc(specialkey)
glutSpecialUpFunc(specialkeyUp)
glutIgnoreKeyRepeat(1)
glutIdleFunc(update)
os.chdir(startdir)
glEnable(GL_DEPTH_TEST)
quadric = gluNewQuadric()
gluQuadricTexture(quadric, GL_TRUE)
glInitMultitextureARB()
glutMainLoop()