編輯機器人動作_02 期末作業倒數兩週

1.參考Projection.exe檔案


( Ⅰ.) 



   ※ fov : Field Of Vision                   ※fovy : Y方向的視野
               野            視



   ※aspect ratio : 長寬比例



   ※zNear : z方向 , 近的面



   ※zFar : z方向 , 遠的面

( Ⅱ.)  glFrustum





2. 開GLUT專案

( Ⅰ.)改resize()函式裡面的glFrustum()變成gluPerspective()



static void resize(int width, int height)
{
    const float ar = (float) width / (float) height;

    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
   ///glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
       gluPerspective(60,1, 0.001, 1000 );
    ///glOrtho(-1,+1, -1,+1, -1,+1);///預設值,很限制
    ///glOrtho(-3.4, +3.4,  -2.2, +2.2, -6.0, +16.0);///TODO2

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity() ;///TODO3 for gluLookAt()
    gluLookAt(eyeX,eyeY,eyeZ, centerX,centerY,centerZ, 0,1,0);
}




( Ⅱ.)改gluPerspective()變成glOrtho()

 
   const float ar = (float) width / (float) height;

    gluPerspective(60,ar, 0.001, 1000 );///與視窗長寬一同調整大小

       glOrtho(-3.4, 3.4, -2.2, 2.2, -6.0, 16.0);

( Ⅲ.) Center、Eye、Up



( Ⅳ.)投影立體茶壺



#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif

#include <stdlib.h>

static int slices = 16;
static int stacks = 16;

/* GLUT callback Handlers */
float eyeX=0, eyeY=0, eyeZ=1; /// for gluLookAt()
float centerX=0, centerY=0, centerZ=0;/// for gluLookAt()
static void resize(int width, int height)
{
    const float ar = (float) width / (float) height;

    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    ///glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
    gluPerspective( 60, ar, 0.001, 1000 );///TODO3
    ///glOrtho(-1,+1, -1,+1, -1,+1);///預設值,很限制
    ///glOrtho(-3.4, +3.4,  -2.2, +2.2, -6.0, +16.0);///TODO2

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity() ;///TODO3 for gluLookAt()
    gluLookAt(eyeX,eyeY,eyeZ, centerX,centerY,centerZ, 0,1,0);
}

static void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);///,只放我們的Teapot

    glutSwapBuffers();
}

///key全刪....

static void idle(void)
{
 
    glutPostRedisplay();
}

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };

/* Program entry point */

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutReshapeFunc(resize);
    glutDisplayFunc(display);
    ///glutKeyboardFunc(key);
    glutIdleFunc(idle);

    glClearColor(1,1,1,1);

    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

    glutMainLoop();

    return EXIT_SUCCESS;

}

/*

 * GLUT Shapes Demo

 *

 * Written by Nigel Stewart November 2003

 *

 * This program is test harness for the sphere, cone

 * and torus shapes in GLUT.

 *

 * Spinning wireframe and smooth shaded shapes are

 * displayed until the ESC or q key is pressed.  The

 * number of geometry stacks and slices can be adjusted

 * using the + and - keys.

 */

#ifdef __APPLE__

#include <GLUT/glut.h>

#else

#include <GL/glut.h>

#endif

#include <stdlib.h>

static int slices = 16;

static int stacks = 16;

/* GLUT callback Handlers */

float eyeX=0, eyeY=0, eyeZ=1; ///TODO3 for gluLookAt()

float centerX=0, centerY=0, centerZ=0;///TODO3 for gluLookAt()

static void resize(int width, int height)

{

    const float ar = (float) width / (float) height;

    glViewport(0, 0, width, height);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    ///glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);

    gluPerspective( 60, ar, 0.001, 1000 );///TODO3

    ///glOrtho(-1,+1, -1,+1, -1,+1);///預設值,很限制

    ///glOrtho(-3.4, +3.4,  -2.2, +2.2, -6.0, +16.0);///TODO2

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity() ;///TODO3 for gluLookAt()

    gluLookAt(eyeX,eyeY,eyeZ, centerX,centerY,centerZ, 0,1,0);

}

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);///TODO3,只放我們的Teapot

    glutSwapBuffers();

}

///key全刪....

static void idle(void)

{

    ///TODO3: 等一下要在這裡做動作....

    glutPostRedisplay();

}

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };

const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat high_shininess[] = { 100.0f };

/* Program entry point */

void motion(int x,int y)

{

    eyeX = (x-320)/320.0;

    eyeY = (y-240)/240.0;

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt(eyeX,eyeY,eyeZ,centerX,centerY,centerZ,0,1,0);

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitWindowSize(640,480);

    glutInitWindowPosition(10,10);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutReshapeFunc(resize);

    glutDisplayFunc(display);

    ///glutKeyboardFunc(key);

    glutIdleFunc(idle);

    glutMotionFunc(motion);

    glClearColor(1,1,1,1);

    glEnable(GL_DEPTH_TEST);

    glDepthFunc(GL_LESS);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);

    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);

    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);

    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);

    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);

    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

    glutMainLoop();

    return EXIT_SUCCESS;

}