127 lines
2.6 KiB
C++
127 lines
2.6 KiB
C++
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#include <cstdlib>
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// for mac osx
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#ifdef __APPLE__
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#include <OpenGL/gl.h>
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#include <OpenGL/glu.h>
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#include <GLUT/glut.h>
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#else
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// only for windows
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#ifdef _WIN32
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#include <windows.h>
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#endif
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// for windows and linux
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <GL/freeglut.h>
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#endif
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#include <iostream>
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using namespace std;
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void display()
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{
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glLoadIdentity();
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/* clear window */
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glClear(GL_COLOR_BUFFER_BIT);
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// set current matrix as GL_MODELVIEW
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glMatrixMode(GL_MODELVIEW);
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// draw scene
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// add a copy of the curr. matrix to the stack
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glPushMatrix();
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glPushMatrix();
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// translate by -3 on the z
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glTranslatef(0, 0, -3);
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// set drawing color to red
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glColor3f(1.0f, 0.0f, 0.0f);
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// middle red teapot
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glutWireTeapot(1);
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// translate by 2 on the y
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glTranslatef(0, 2, 0);
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// set drawing color to green
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glColor3f(0.0f, 1.0f, 0.0f);
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// rotate 90 deg around x
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glRotatef(90, 1.0f, 0.0f, 0.0f);
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// top green teapot
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glutWireTeapot(1);
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// pop the current matrix
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glPopMatrix();
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// translate -2 on y and -1 on z
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glTranslatef(0, -2, -1);
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// set drawing color to blue
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glColor3f(0.0f, 0.0f, 1.0f);
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// bottom blue teapot
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glutWireTeapot(1);
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// pop the current matrix
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glPopMatrix();
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/* flush drawing routines to the window */
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glFlush();
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}
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// Function called everytime a key is pressed
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void key(unsigned char key, int x, int y)
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{
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switch (key)
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{
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case 27:
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case 'q':
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exit(EXIT_SUCCESS);
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break;
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default:
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break;
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}
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glutPostRedisplay();
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}
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void reshape(int width, int height)
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{
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/* define the viewport transformation */
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glViewport(0, 0, width, height);
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}
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int main(int argc, char *argv[])
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{
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/* initialize GLUT, using any commandline parameters passed to the
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program */
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glutInit(&argc, argv);
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/* setup the size, position, and display mode for new windows */
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glutInitWindowSize(500, 500);
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glutInitWindowPosition(0, 0);
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glutInitDisplayMode(GLUT_RGB);
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/* create and set up a window */
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glutCreateWindow("hello, teapot!");
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// Set up the callback functions
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// for display
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glutDisplayFunc(display);
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// for the keyboard
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glutKeyboardFunc(key);
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// for reshaping
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glutReshapeFunc(reshape);
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/* define the projection transformation */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(60, 1, 1, 10);
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/* define the viewing transformation */
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glMatrixMode(GL_MODELVIEW);
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gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, -1.0, 0.0, 1.0, 0.0);
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/* tell GLUT to wait for events */
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glutMainLoop();
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}
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