Help to add multiple cubes that each can rotate

OpenGL OpenGL: Basic Coding
1

here my coding…my teacher gave me the task to fix the cube and add more cubes…even though im new to opengl

#include <iostream>
#include <stdlib.h>
#include <GL/glut.h>
static GLfloat theta[] = { 0.0, 0.0, 0.0 };
static GLint axis = 2;
using namespace std;
//Called when a key is pressed
void handleKeypress(unsigned char key, int x, int y) {
	switch (key) {
	case 27: //Escape key
		exit(0);
	}
}
//Initializes 3D rendering
void initRendering() {
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_COLOR_MATERIAL);
	glEnable(GL_LIGHTING); //Enable lighting
	glEnable(GL_LIGHT0); //Enable light #0
	glEnable(GL_LIGHT1); //Enable light #1
	glEnable(GL_NORMALIZE); //Automatically normalize normals
	//glShadeModel(GL_SMOOTH); //Enable smooth shading
}
//Called when the window is resized
void handleResize(int w, int h) {
	glViewport(0, 0, w, h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45.0, (double)w / (double)h, 1.0, 200.0);
}
float _angle = -70.0f;
//Draws the 3D scene
void drawScene() {
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glTranslatef(0.0f, 0.0f, -20.0f);
	
	//Add ambient light
	GLfloat ambientColor[] = { 1.2f, 0.2f, 0.2f, 1.0f }; //Color (0.2, 0.2,0.2);
	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientColor);
	//Add positioned light
	GLfloat lightColor0[] = { 0.5f, 0.5f, 0.5f, 1.0f }; //Color (0.5, 0.5, 0.5)
	GLfloat lightPos0[] = { 4.0f, 0.0f, 8.0f, 1.0f }; //Positioned at (4, 0, 8)
	glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor0);
	glLightfv(GL_LIGHT0, GL_POSITION, lightPos0);
	//Add directed light
	GLfloat lightColor1[] = { 0.5f, 0.2f, 0.2f, 1.0f }; //Color (0.5, 0.2, 0.2)
	//Coming from the direction (-1, 0.5, 0.5)
	GLfloat lightPos1[] = { -1.0f, 0.5f, 0.5f, 0.0f };
	glLightfv(GL_LIGHT1, GL_DIFFUSE, lightColor1);
	glLightfv(GL_LIGHT1, GL_POSITION, lightPos1);
	//glRotatef(_angle, 0.0f, 1.0f, 0.0f);
	glRotatef(theta[0], 1.0, 0.0, 0.0);
	glRotatef(theta[1], 0.0, 1.0, 0.0);
	glRotatef(theta[2], 0.0, 0.0, 1.0);
	glColor3f(0.0f, 1.0f, 6.2f);
	glBegin(GL_QUADS);
	//Front
	
	glNormal3f(0.0f, 0.0f, 1.0f);
	glVertex3f(-1.5f, -1.0f, 1.5f);
	glVertex3f(1.5f, -1.0f, 1.5f);
	glVertex3f(1.5f, 1.0f, 1.5f);
	glVertex3f(-1.5f, 1.0f, 1.5f);

	//Right

	glNormal3f(1.0f, 0.0f, 0.0f);
	glVertex3f(1.5f, -1.0f, -1.5f);
	glVertex3f(1.5f, 1.0f, -1.5f);
	glVertex3f(1.5f, 1.0f, 1.5f);
	glVertex3f(1.5f, -1.0f, 1.5f);

	//Back
	glNormal3f(0.0f, 0.0f, -1.0f);	
	glVertex3f(-1.5f, -1.0f, -1.5f);
	glVertex3f(-1.5f, 1.0f, -1.5f);	
	glVertex3f(1.5f, 1.0f, -1.5f);	
	glVertex3f(1.5f, -1.0f, -1.5f);
	//Left
	glNormal3f(-1.0f, 0.0f, 0.0f);	
	glVertex3f(-1.5f, -1.0f, -1.5f);
	glVertex3f(-1.5f, -1.0f, 1.5f);	
	glVertex3f(-1.5f, 1.0f, 1.5f);	
	glVertex3f(-1.5f, 1.0f, -1.5f);

	//top
	glNormal3f(0.0f, 1.0f, 0.0f);
	glVertex3f(1.5f, 1.0f, 1.5f);
	glVertex3f(-1.5f, 1.0f, 1.5f);
	glVertex3f(-1.5f, 1.0f, -1.5f);
	glVertex3f(1.5f, 1.0f, -1.5f);


	//down
	glNormal3f(0.0f, -1.0f, 0.0f);
	glVertex3f(1.5f, -1.0f, 1.5f);
	glVertex3f(-1.5f, -1.0f, 1.5f);
	glVertex3f(-1.5f, -1.0f, -1.5f);
	glVertex3f(1.5f, -1.0f, -1.5f);
	
	glEnd();
	glutSwapBuffers();
}

void update(int value) {
	_angle += 1.5f;
	if (_angle > 360) {
		_angle -= 360;
	}
	glutPostRedisplay();
	glutTimerFunc(25, update, 0);
}
void spinCube()
{
	/* idle callback, spin cube 2 degrees about selected axis */
	theta[axis] += 0.5;
	if (theta[axis] > 360.0) theta[axis] -= 360.0;
	/* display(); */
	glutPostRedisplay();
}
void mouse(int btn, int state, int x, int y)
{
	/* mouse callback, selects an axis about which to rotate */
	if (btn == GLUT_LEFT_BUTTON && state == GLUT_DOWN) axis = 0;
	if (btn == GLUT_MIDDLE_BUTTON && state == GLUT_DOWN) axis = 1;
	if (btn == GLUT_RIGHT_BUTTON && state == GLUT_DOWN) axis = 2;
}
int main(int argc, char** argv) {
	//Initialize GLUT
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize(800, 600);
	//Create the window
	glutCreateWindow("Create Box with Lighting");
	initRendering();
	//Set handler functions
	glutDisplayFunc(drawScene);
	glutKeyboardFunc(handleKeypress);
	glutReshapeFunc(handleResize);
	glutIdleFunc(spinCube);
	glutMouseFunc(mouse);
	glutTimerFunc(25, update, 0); //Add a timer
	glutMainLoop();
	return 0;
}
2

Please read Before You Post #5 in our Forum Posting Guidelines.

1 Like
3