Gamba Primitiv

#include <iostream>
#include <GL\glew.h>
#include <GL\freeglut.h>


void kotakMerah() {
    glBegin(GL_QUADS); // Menggambar kotak merah
    glColor3f(1.0f, 0.0f, 0.0f);
    glVertex2f(-0.7, 0.7);
    glVertex2f(-0.2, 0.7);
    glVertex2f(-0.2, 0.2);
    glVertex2f(-0.7, 0.2);
    glEnd();
}

void KotakHijau() {
    glBegin(GL_QUADS);// warna hijau
    glColor3f(0.0f, 1.0f, 0.0f);
    glVertex2f(-0.6, 0.1);
    glVertex2f(-0.1, 0.1);
    glVertex2f(-0.1, -0.4);
    glVertex2f(-0.6, -0.4);
    glEnd();
}

void kotakGradienHitamPutih() {
    glBegin(GL_TRIANGLES);// 
    glColor3f(1.0f, 1.0f, 1.0f);
    glVertex2f(-0.8, -0.2);
    //warna hitam
    glColor3f(0.0f, 0.0f, 0.0f);

    glVertex2f(-0.4, -0.2);
    glVertex2f(-0.8, -0.5);

    glEnd();

    glBegin(GL_TRIANGLES);// warna hijau
    glColor3f(0.0f, 0.0f, 0.0f);

    glVertex2f(-0.8, -0.5);

    glVertex2f(-0.4, -0.2);
    glColor3f(1.0f, 1.0f, 1.0f);
    glVertex2f(-0.4, -0.5);

    glEnd();
}

void heksagonKuning() {


	glBegin(GL_POLYGON);// warna kuning
	glColor3f(1.0f, 1.0f, 0.0f);
	glVertex2f(0.3, 0.7);
	glVertex2f(0.5, 0.7);
	glVertex2f(0.6, 0.5);
	glVertex2f(0.5, 0.3);
	glVertex2f(0.3, 0.3);
	glVertex2f(0.2, 0.5);
	glEnd();

}

void segitigaBiru() {
	glBegin(GL_TRIANGLES);// warna biru
	glColor3f(0.0f, 0.0f, 1.0f);
	glVertex2f(0.3, 0.0);
	glVertex2f(0.1, -0.4);
	glVertex2f(0.5, -0.4);
	glEnd();

}

void segitigaKebalik() {
	glBegin(GL_TRIANGLES);

    glColor3f(1.0f, 0.0f, 0.0f);
	glVertex2f(0.3, -0.2);

    glColor3f(0.0f, 1.0f, 0.0f);
	glVertex2f(0.7, -0.2);

    glColor3f(0.0f, 0.0f, 1.0f);
	glVertex2f(0.5, -0.6);

	glEnd();

}

void render() {

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // membersihkan buffer warna dan kedalaman
    glLoadIdentity(); // mereset semua transformasi

	
	kotakMerah(); // memanggil fungsi kotakMerah

	KotakHijau(); // memanggil fungsi KotakHijau

	kotakGradienHitamPutih(); // memanggil fungsi kotakGradienHitamPutih

	heksagonKuning(); // memanggil fungsi heksagonKuning

	segitigaBiru(); // memanggil fungsi segitigaBiru

	segitigaKebalik(); // memanggil fungsi segitigaKebalik


    glutSwapBuffers(); // menukar buffer depan dan belakang
}

void changeViewPort(int w, int h) {
    glViewport(0, 0, w, h);
}

int main(int argc, char* argv[]) {
    glutInit(&argc, argv); // Initialize GLUT

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH); // Seting memory buffer

    glutInitWindowSize(500  , 500); // Set windows size

    glutCreateWindow("Render Shapes"); // Membuat windows dengan title Render Shapes

    glutReshapeFunc(changeViewPort); // Agar ketika di-resize menggunakan size baru
    glutDisplayFunc(render); // Subcribe onrender

    GLenum err = glewInit();
    if (GLEW_OK != err) {
        std::cout << "Error initializing GLEW" << std::endl;
        return 1;
    }

    glutMainLoop(); // Masuk ke dalam loop utama
    return 0;
}