lession 5 3D
// lession 5 3D
#include <OpenGL/OpenGL.h>
#include <GLUT/GLUT.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
float rtri; // angle for the triangel
float rquad; // angle for the quad
void initGL(void) // Create some everyday functions
{
glShadeModel(GL_SMOOTH); // Enable smooth shading
glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // black background
glClearDepth(1.0f); // depth buffer setup
glEnable(GL_DEPTH_TEST); // Depth buffer setup
glDepthFunc(GL_LEQUAL); // the type of depth testing to do.
glEnable(GL_COLOR_MATERIAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void display(void) // create the siplay functions
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear screen and depth buffer
glLoadIdentity(); // reset the current modelview matrix
glPushMatrix();
{
glTranslatef(-1.5f, 0.0f, -6.0f); // Move left 1.5 units and into the screen 6.0
glRotatef(rtri, 0.0f, 1.0f, 0.0f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f); // red
glVertex3f(0.0f, 1.0f, 0.0f); // top of triangle (Front);
glColor3f(0.0f, 1.0f, 0.0f); // green
glVertex3f(-1.0f, -1.0f, 1.0f); // Left of triangle (Front)
glColor3f(0.0, 0.0, 1.0); // blue
glVertex3f(1.0f, -1.0f, 1.0f); // right of triangle (Front)
glColor3f(1.0, 0.0, 0.0); // red
glVertex3f(0.0f, 1.0f, 0.0f); // top of triangle (right)
glColor3f(0.0f, 0.0f, 1.0f); // blue
glVertex3f(1.0f, -1.0f, 1.0f); // left of triangle (right)
glColor3f(0.0, 1.0, 0.0); // green
glVertex3f(1.0f, -1.0f, -1.0f); // right of triangle (right);
glColor3f(1.0f, 0.0f, 0.0f); // red
glVertex3f(0.0f, 1.0f, 0.0f); // top of triangle (back);
glColor3f(0.0f, 1.0f, 0.0f); // green
glVertex3f(1.0f, -1.0f, -1.0f); // left of triangle (back)
glColor3f(0.0f, 0.0f, 1.0f); // blue
glVertex3f(-1.0f, -1.0f, -1.0f); // right of triangle (back)
glColor3f(1.0f, 0.0f, 0.0f); // red
glVertex3f(0.0f, 1.0f, 0.0f); // top of triangle (left)
glColor3f(0.0f, 0.0f, 1.0f); // blue
glVertex3f(-1.0f, -1.0f, -1.0f); // left of triangle (left)
glColor3f(0.0f, 1.0f, 0.0f); // green
glVertex3f(-1.0f, -1.0f, 1.0f); // right of triangle (left);
glEnd();
glLoadIdentity();
glTranslatef(1.5f, 0.0f, -6.0f);
glRotatef(rquad, 1.0f, 0.0f, 0.0f); // Rotate the quad on the x axis
glColor3f(0.5f, 0.5f, 1.0f); // Set teh color to blue on time only
glBegin(GL_QUADS);
glColor3f(0.0f, 1.0f, 0.0f); // Set the color to blue
glVertex3f( 1.0f, 1.0f, -1.0f); // top right of the quad (top)
glVertex3f(-1.0f, 1.0f, -1.0f); // top left of the quad (top)
glVertex3f(-1.0f, 1.0f, 1.0f); // bottom left of the quad (top)
glVertex3f( 1.0f, 1.0f, 1.0f); // bottom right of the quad (top)
glColor3f(1.0f, 0.5f, 0.0f); // Set the color to Orange
glVertex3f( 1.0f, -1.0f, -1.0f); // top right of the quad (bottom)
glVertex3f(-1.0f, -1.0f, -1.0f); // top left of the quad (bottom)
glVertex3f(-1.0f, -1.0f, 1.0f); // bottom left of the quad (bottom)
glVertex3f( 1.0f, -1.0f, 1.0f); // bottom right of the quad (bottom)
glColor3f(1.0f, 0.0f, 0.0f); // Set the color to red
glVertex3f( 1.0f, 1.0f, 1.0f); // top right of the quad (front)
glVertex3f(-1.0f, 1.0f, 1.0f); // top left of the quad (front)
glVertex3f(-1.0f, -1.0f, 1.0f); // bottom left of the quad (front)
glVertex3f( 1.0f, -1.0f, 1.0f); // bottom right of the quad (front)
glColor3f(1.0f, 1.0f, 0.0f); // Set the color to Yellow
glVertex3f( 1.0f, 1.0f, -1.0f); // top right of the quad (back)
glVertex3f(-1.0f, 1.0f, -1.0f); // top left of the quad (back)
glVertex3f(-1.0f, -1.0f, -1.0f); // bottom left of the quad (back)
glVertex3f( 1.0f, -1.0f, -1.0f); // bottom right of the quad (back)
glColor3f(0.0f, 0.0f, 1.0f); // Set the color to blue
glVertex3f(-1.0f, 1.0f, 1.0f); // top right of the quad (left)
glVertex3f(-1.0f, 1.0f, -1.0f); // top left of the quad (left)
glVertex3f(-1.0f, -1.0f, -1.0f); // bottom left of the quad (left)
glVertex3f(-1.0f, -1.0f, 1.0f); // bottom right of the quad (left)
glColor3f(1.0f, 0.0f, 1.0f); // Set the color to Violet
glVertex3f( 1.0f, 1.0f, -1.0f); // top right of the quad (right)
glVertex3f( 1.0f, 1.0f, 1.0f); // top left of the quad (right)
glVertex3f( 1.0f, -1.0f, 1.0f); // bottom left of the quad (right)
glVertex3f( 1.0f, -1.0f, -1.0f); // bottom right of the quad (right)
glEnd();
}
glPopMatrix();
rtri += 0.2f; // increase the rotation variable for the triangle (NEW)
rquad -= 0.2f; // decrease the rotation variable for the quad (NEW)
glutSwapBuffers(); // Swap the buffers to not be left with a clear screen.
}
// Create the reshape function (the viewport)
void reshape(int width, int height)
{
if (height == 0)
height = 1;
glViewport(0, 0, width, height); // Reset the current viewport
glMatrixMode(GL_PROJECTION); // Select the projection matrix
glLoadIdentity(); // Rest the projection matrix
// Calculate the aspect ratio of the window
gluPerspective(45.0f, (GLfloat) width / (GLfloat) height, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW); // Select the Modelview Matrix
glLoadIdentity(); // Reset the Modelview Matrix
}
// Create keyboard function
void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case 27:
exit(0);
break;
default:
break;
}
}
// Create Special Function (required for arrow keys)
void arrow_keys(int a_keys, int x, int y)
{
switch (a_keys) {
case GLUT_KEY_UP: // When Up Arrow is pressed...
glutFullScreen(); // Go into full screen mode
break;
case GLUT_KEY_DOWN: // When Down arrow is pressed....
glutReshapeWindow(500, 500); // go into a 500 by 500 window
break;
default:
break;
}
}
// create main function for bringing it all together
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
glutInitWindowSize(500, 500);
glutCreateWindow("NeHe's OpenGL Framework");
// glutFullScreen();
initGL();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
glutSpecialFunc(arrow_keys);
glutIdleFunc(display);
glutMainLoop();
return 0;
}
Mac 终端运行：
$: clang -o lession lession5.c -Wno-deprecated -framework OpenGL -framework GLUT
$: ./lession
原文：http://blog.csdn.net/jabezlee/article/details/39047699