Membuat Efek Pencahayaan pada Object 3D OpenGL

Cahaya3D.cpp

#include<GL/glut.h>
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int w = 400, h = 400;
int sudut = 0, o = 0, p = 0, q = 0;
int a, b;

void renderScene(void){
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	GLfloat LightPosition[] = { 10.0f, 20.0f, 30.0f, 0.0f };
	LightPosition[0] = a;
	LightPosition[1] = b;
	glLightfv(GL_LIGHT0, GL_POSITION, LightPosition);
	glRotatef(sudut, o, p, q);
	glEnable(GL_COLOR_MATERIAL);

	//dinding rumah
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glTranslatef(0, 0, -100);
	glRotatef(50, 0, 1, 0);
	glColor3f(0, 0, 1);
	glutSolidCube(20);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	//atap
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glTranslatef(0, 10, -100);
	glScalef(20, 10, 20);
	glRotatef(5, 0, 1, 0);
	glColor3f(0, 1, 0);
	glutSolidOctahedron();
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	//pintu
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 0, 0);
	glTranslatef(-9, -5, -95);
	glRotatef(140, 0, 1, 0);
	glScalef(6, 10, 1);
	glutSolidCube(1);
	glPopMatrix();

	//jendela
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 1, 0);
	glTranslatef(-5, -3, -90);
	glRotatef(130, 0, 1, 0);
	glScalef(2, 2, 1);
	glutSolidCube(1);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 1, 0);
	glTranslatef(-2, -3, -80);
	glRotatef(130, 0, 1, 0);
	glScalef(2, 2, 1);
	glutSolidCube(1);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 1, 0);
	glTranslatef(-2, 0, -80);
	glRotatef(130, 0, 1, 0);
	glScalef(2, 2, 1);
	glutSolidCube(1);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 1, 0);
	glTranslatef(-5, 0, -90);
	glRotatef(130, 0, 1, 0);
	glScalef(2, 2, 1);
	glutSolidCube(1);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	//pagar
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(0, 1, 0);
	glTranslatef(-30, -5, -110);
	glRotatef(50, 0, 1, 0);
	glScalef(25, 5, 1);
	glutSolidCube(2);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(0, 1, 0);
	glTranslatef(10, -5, -110);
	glRotatef(140, 0, 1, 0);
	glScalef(30, 5, 1);
	glutSolidCube(2);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(0, 1, 0);
	glTranslatef(25, -5, -82);
	glRotatef(50, 0, 1, 0);
	glScalef(20, 5, 1);
	glutSolidCube(2);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(0, 1, 0);
	glTranslatef(-32, -5, -74);
	glRotatef(140, 0, 1, 0);
	glScalef(10, 5, 1);
	glutSolidCube(2);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();

	//lantai
	glPushMatrix();
	glEnable(GL_COLOR_MATERIAL);
	glColor3f(1, 1, 1);
	glTranslatef(0, -11, -100);
	glRotatef(90, 1, 0, 0);
	glScalef(50, 50, 1);
	glutSolidCube(2);
	glDisable(GL_COLOR_MATERIAL);
	glPopMatrix();
	glutSwapBuffers();
}

void resize(int w1, int h1){
	glViewport(0, 0, 400, 400);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(60.0, (float)w1 / (float)h1, 1.0, 200.0);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

void mouse(int button, int state, int x, int y){
	a = x - (w / 2);
	b = (h / 2) - y;
}

void motion(int x, int y){
	a = x - (w / 2);
	b = (h / 2) - y;
}

void myKeyboard(unsigned char key, int x, int y){
	if (key == 'a') {
		o = 1;
		p = 0;
		q = 0;
		sudut += 10;
	}

	else if (key == 'd'){
		o = 0;
		p = 1;
		q = 0;
		sudut += 10;
	}

	else if (key == 's'){
		o = 0;
		p = 0;
		q = 1;
		sudut += 10;
	}
}

void timer(int value){
	glutPostRedisplay();
	glutTimerFunc(50, timer, 0);
}

void init(){
	GLfloat LightAmbient[] = { 1.0f, 1.0f, 1.0f, 1.0f };
	GLfloat LightDiffuse[] = { 0.7f, 0.7f, 0.7f, 1.0f };
	GLfloat LightSpecular[] = { 0.5f, 10.0f, 20.0f, 10.0f };
	GLfloat Shine[] = { 80 };
	glShadeModel(GL_SMOOTH);
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
	glClearDepth(1.0f);
	glEnable(GL_DEPTH_TEST);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
	glMaterialfv(GL_FRONT, GL_SPECULAR, LightSpecular);
	glMaterialfv(GL_FRONT, GL_SHININESS, Shine);
	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);
	return;
}

void main(int argc, char **argv){
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGBA);
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(w, h);
	glutCreateWindow("3D");
	init();
	glutDisplayFunc(renderScene);
	glutReshapeFunc(resize);
	glutMouseFunc(mouse);
	glutMotionFunc(motion);
	glutKeyboardFunc(myKeyboard);
	glutTimerFunc(1, timer, 0);
	glutMainLoop();
}