Berikut ini adalah program OpenGL untuk membuat gambar pada segitiga tenda.
Praktikum grafika 10.
#include <windows.h>
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <glut.h>
#include <glu.h>
#include "imageloader.h"
using namespace std;
GLuint loadTexture(Image* image) {
GLuint textureId;
glGenTextures(1, &textureId); //Make room for our texture
glBindTexture(GL_TEXTURE_2D, textureId); //Tell OpenGL which texture to edit
//Map the image to the texture
glTexImage2D(GL_TEXTURE_2D, //Always GL_TEXTURE_2D
0, //0 for now
GL_RGB, //Format OpenGL uses for image
image->width, image->height, //Width and height
0, //The border of the image
GL_RGB, //GL_RGB, because pixels are stored in RGB format
GL_UNSIGNED_BYTE, //GL_UNSIGNED_BYTE, because pixels are stored
//as unsigned numbers
image->pixels); //The actual pixel data
return textureId; //Returns the id of the texture
}
GLuint _textureId; //The id of the texture
void initRendering() {
glEnable(GL_DEPTH_TEST);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_NORMALIZE);
glShadeModel(GL_SMOOTH);
Image* image = loadBMP("uadLogo.bmp");
_textureId = loadTexture(image);
delete image;
}
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 = 60.0f;
void drawScene() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -8.0f);
GLfloat ambientColor[] = {0.2f, 0.2f, 0.2f, 1.0f};
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientColor);
GLfloat lightColor0[] = {0.5f, 0.5f, 0.5f, 1.0f};
GLfloat lightPos0[] = {4.0f, 0.0f, 8.0f, 1.0f};
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor0);
glLightfv(GL_LIGHT0, GL_POSITION, lightPos0);
//radius
GLfloat lightColor1[] = {0.5f, 0.2f, 0.2f, 1.0f};
GLfloat lightPos1[] = {-1.0f, 0.5f, 0.5f, 0.0f};
glLightfv(GL_LIGHT1, GL_DIFFUSE, lightColor1);
glLightfv(GL_LIGHT1, GL_POSITION, lightPos1);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, _textureId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glRotatef(_angle, 0.0f, 1.0f, 0.0f);
glColor3f(1.0f, 1.0f, 0.0f);
//glScalef(1.0f, 1.5f, 1.0f);
glBegin(GL_QUADS);
//Front
//glNormal3f(0.0f, 0.0f, 1.0f);
//glNormal3f(-1.0f, 0.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f);
glVertex3f(-1.5f, -1.0f, 1.5f);
//glNormal3f(1.0f, 0.0f, 1.0f);
glTexCoord2f(1.0, 0.0f);
glVertex3f(1.5f, -1.0f, 1.5f);
//glNormal3f(1.0f, 0.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(1.5f, 1.0f, 0.0f);
//glNormal3f(-1.0f, 0.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(-1.5f, 1.0f, 0.0f);
//Right
glColor3f(1.0f, 0.0f, 0.0f);
//glNormal3f(1.0f, 0.0f, 0.0f);
//glNormal3f(1.0f, 0.0f, -1.0f);
glVertex3f(1.5f, -1.0f, -1.5f);
//glNormal3f(1.0f, 0.0f, -1.0f);
glVertex3f(1.5f, 1.0f, 0.0f);
//glNormal3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.5f, -1.0f, 1.5f);
//glNormal3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.5f, -1.0f, -1.5f);
//Back
glColor3f(0.0f, 0.0f, 1.0f);
//glNormal3f(0.0f, 0.0f, -1.0f);
//glNormal3f(-1.0f, 0.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f);
glVertex3f(-1.5f, -1.0f, -1.5f);
//glNormal3f(-1.0f, 0.0f, -1.0f);
glTexCoord2f(1.0, 0.0f);
glVertex3f(-1.5f, 1.0f, 0.0f);
//glNormal3f(1.0f, 0.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(1.5f, 1.0f, 0.0f);
//glNormal3f(1.0f, 0.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(1.5f, -1.0f, -1.5f);
//Left
glColor3f(0.0f, 1.0f, 0.0f);
//glNormal3f(-1.0f, 0.0f, 0.0f);
//glNormal3f(-1.0f, 0.0f, -1.0f);
glVertex3f(-1.5f, -1.0f, -1.5f);
//glNormal3f(-1.0f, 0.0f, 1.0f);
glVertex3f(-1.5f, -1.0f, 1.5f);
//glNormal3f(-1.0f, 0.0f, 1.0f);
glVertex3f(-1.5f, 1.0f, 0.0f);
//glNormal3f(-1.0f, 0.0f, -1.0f);
glVertex3f(-1.5f, -1.0f, -1.5f);
/*
//Front
glVertex3f(-1.5f, 1.0f, 1.5f);
glVertex3f(0.0f, -1.0f, 1.5f);
glVertex3f(1.5f, 1.0f, 1.5f);
glVertex3f(-1.5f, 1.0f, 1.5f);
//biru
//glColor3f(0.0f,0.0f,1.0f);
glVertex3f(-1.5f, 1.0f, -1.5f);
glVertex3f(0.0f, -1.0f, -1.5f);
glVertex3f(1.5f, 1.0f, -1.5);
glVertex3f(-1.5f, 1.0f, -1.5f);
//merah
glColor3f(1.0f,0.0f,0.0f);
glTexCoord2f(-1.5f, 1.0f);
glVertex3f(-1.5f, 1.0f, 1.5f);
glTexCoord2f(-1.5f, 1.0f);
glVertex3f(-1.5f, 1.0f, -1.5f);
glTexCoord2f(0.0f, -1.0f);
glVertex3f(0.0f, -1.0f, -1.5f);
glTexCoord2f(0.0f, -1.0f);
glVertex3f(0.0f, -1.0f,1.5f);
//ijo
glColor3f(0.0f,1.0f,0.0f);
glTexCoord2f(1.5f, 1.0f);
glVertex3f(1.5f,1.0f,1.5f);
glTexCoord2f(1.5f, 1.0f);
glVertex3f(1.5f,1.0f,-1.5f);
glTexCoord2f(0.0f, -1.0f);
glVertex3f(0.0f, -1.0f, -1.5f);
glTexCoord2f(0.0f, -1.0f);
glVertex3f(0.0f, -1.0f,1.5f);
*/
glEnd();
glDisable(GL_TEXTURE_2D);
glutSwapBuffers();
}
void update(int value) {
_angle += 1.5f;
if (_angle > 360) {
_angle -= 360;
}
glutPostRedisplay();
glutTimerFunc(25, update, 0);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(400, 400);
glutCreateWindow("Lighting");
initRendering();
glutDisplayFunc(drawScene);
glutReshapeFunc(handleResize);
glutTimerFunc(25, update, 0);
glutMainLoop();
return 0;
}
