Event Handling Font & Text

      Event handling ini merupakan penambahan materi pada postingan sebelumnya, dan berikut ini merupakan source code yang digunakan :

from OpenGL.GL import *

from OpenGL.GLU import *

from OpenGL.GLUT import *

pos_x = 0

pos_y = 0

merah = 0

hijau = 0

biru = 0

teks_merah = 1

teks_hijau = 1

teks_biru = 1

warna_objek = "Hitam"

warna_background = "Hitam"

def init():

glClearColor(0.0, 0.0, 0.0, 1.0)

gluOrtho2D(-500.0, 500.0, -500.0, 500.0)

def drawBitmapText(string,x,y,z) :

glRasterPos3f(x,y,z)

for c in string :

glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,ord(c))

def reshape(w, h):

glViewport(0,0,w,h)

glMatrixMode(GL_PROJECTION)

glLoadIdentity()

gluOrtho2D(0,w,h,0)

glMatrixMode(GL_MODELVIEW)

glLoadIdentity()

def drawText():

glColor3f(teks_merah,teks_hijau,teks_biru)

drawBitmapText("Colour",-460,-350,0)

drawBitmapText("Object : " + warna_objek,-460,-400,0)

drawBitmapText("Background : " + warna_background ,-460,-450,0)

def kotak():

global pos_x, pos_y

glColor3f(merah,hijau,biru)

glBegin(GL_POLYGON)

glVertex2f(-50 + pos_x,-50 + pos_y)

glVertex2f(50 + pos_x,-50 + pos_y)

glVertex2f(50 + pos_x,50 + pos_y)

glVertex2f(-50 + pos_x,50 + pos_y)

glEnd()

def display():

glClear(GL_COLOR_BUFFER_BIT)

drawText();

glColor3f(1.0,1.0,1.0)

glBegin(GL_LINES)

glVertex2f(-500.0, 0.0)

glVertex2f(500.0, 0.0)

glVertex2f(0.0, 500.0)

glVertex2f(0.0, -500.0)

glEnd()

glPushMatrix()

kotak()

glPopMatrix()

glFlush()

def input_mouse(button, state, x, y):

global merah, hijau, biru

global warna_objek

if button == GLUT_RIGHT_BUTTON and state == GLUT_DOWN:

if hijau < 1:

merah = 0

hijau = 1

biru = 0

warna_objek = "Hijau"

elif biru < 1:

merah = 0

hijau = 0

biru = 1

warna_objek = "Biru"

print("Klik Kanan ditekan ", "(", x, ",", y, ")")

elif button == GLUT_LEFT_BUTTON and state == GLUT_DOWN:

if merah < 1:

merah = 1

hijau = 0

biru = 0

warna_objek = "Merah"

else:

merah = 0

hijau = 0

biru = 0

warna_objek = "Hitam"

print("Klik Kiri ditekan ", "(", x, ",", y, ")")

def input_keyboard(key,x,y):

global pos_x, pos_y

global warna_background

global teks_merah, teks_hijau, teks_biru

if key == GLUT_KEY_UP:

pos_y += 5

print("Tombol Atas ditekan ", "x : ", pos_x, " y : ", pos_y)

elif key == GLUT_KEY_DOWN:

pos_y -= 5

print("Tombol Bawah ditekan ", "x : ", pos_x, " y : ", pos_y)

elif key == GLUT_KEY_RIGHT:

pos_x += 5

print("Tombol Kanan ditekan ", "x : ", pos_x, " y : ", pos_y)

elif key == GLUT_KEY_LEFT:

pos_x -= 5

print("Tombol Kiri ditekan ", "x : ", pos_x, " y : ", pos_y)

if pos_x < 0 and pos_y > 0:

glClearColor(1.0, 0.0, 0.0, 1.0)

warna_background = "Merah"

teks_merah = 0

teks_hijau = 0

teks_biru = 0

if pos_x > 0 and pos_y > 0:

glClearColor(0.0, 1.0, 0.0, 1.0)

warna_background = "Hijau"

teks_merah = 0

teks_hijau = 0

teks_biru = 0

if pos_x > 0 and pos_y < 0:

glClearColor(0.0,0.0,1.0,1.0)

warna_background = "Biru"

teks_merah = 1

teks_hijau = 1

teks_biru = 1

if pos_x < 0 and pos_y < 0:

glClearColor(0.0,0.0,0.0,1.0)

warna_background = "Hitam"

teks_merah = 1

teks_hijau = 1

teks_biru = 1

def update(value):

glutPostRedisplay()

glutTimerFunc(10,update,0)

def main():

glutInit(sys.argv)

glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB)

glutInitWindowSize(500,500)

glutInitWindowPosition(100,100)

glutCreateWindow("Tugas 9")

glutDisplayFunc(display)

glutSpecialFunc(input_keyboard)

glutMouseFunc(input_mouse)

glutTimerFunc(50, update, 0)

init()

glutMainLoop()

main()

Dan output yang dihasilkan :