2023電腦圖學二甲: T week15

1.https://jsyeh.org/3dcg10/

eye 從哪裡看

center 哪裡看

up 逆時針轉動

fovy: field of view (y方向) 視野的角度

aspect: aspect ratio 長寬比

2.開新專案

#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 */
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, 0.01, 1000);///角度，比例，近的，遠的
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;
}
static void display(void)
{
const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
const double a = t*90.0;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3d(1,0,0);
glPushMatrix();
glTranslated(-2.4,1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutSolidSphere(1,slices,stacks);
glPopMatrix();
glPushMatrix();
glTranslated(0,1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutSolidCone(1,1,slices,stacks);
glPopMatrix();
glPushMatrix();
glTranslated(2.4,1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutSolidTorus(0.2,0.8,slices,stacks);
glPopMatrix();
glPushMatrix();
glTranslated(-2.4,-1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutWireSphere(1,slices,stacks);
glPopMatrix();
glPushMatrix();
glTranslated(0,-1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutWireCone(1,1,slices,stacks);
glPopMatrix();
glPushMatrix();
glTranslated(2.4,-1.2,-6);
glRotated(60,1,0,0);
glRotated(a,0,0,1);
glutWireTorus(0.2,0.8,slices,stacks);
glPopMatrix();
glutSwapBuffers();
}

static void key(unsigned char key, int x, int y)
{
switch (key)
{
case 27 :
case 'q':
exit(0);
break;
case '+':
slices++;
stacks++;
break;
case '-':
if (slices>3 && stacks>3)
{
slices--;
stacks--;
}
break;
}
glutPostRedisplay();
}
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_CULL_FACE);
glCullFace(GL_BACK);
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;
}

按+,-可調整密度

3.開新專案

#include <GL/glut.h>

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glutSolidTeapot( 0.3 );

glutSwapBuffers();

}

void reshape(int w, int h) {

glViewport(0, 0, w, h);

float ar = w / (float) h;

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(60, ar, 0.01, 1000);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

gluLookAt(0,0,1, 0,0,0, 0,1,0);

glutPostRedisplay();

}

float eyeX = 0, eyeY = 0;

void motion(int x, int y){

eyeX = (x-150.0)/150.0;

eyeY = (150.0-y)/150.0;

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

gluLookAt(eyeX, eyeY, 1, 0,0,0, 0,1,0);

glutPostRedisplay();

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week15");

glutMotionFunc(motion);

glutDisplayFunc(display);

glutReshapeFunc(reshape);

glutMainLoop();

}

按住右鍵可以轉動立體茶壺

4.期末作品

#include <stdio.h>

#include <GL/glut.h>

#include "glm.h"

GLMmodel * head = NULL;

GLMmodel * body = NULL;

GLMmodel * uparmR = NULL;

GLMmodel * lowarmR = NULL;

int show[4] = {1, 1, 1, 1};

int ID = 3;///0:頭 1身體 2上手臂 3下手臂

FILE * fout = NULL;

FILE * fin = NULL;

float teapotX=0, teapotY=0;

float angle[20];

void keyboard(unsigned char key, int x, int y) {

if(key=='0') ID = 0;

if(key=='1') ID = 1;

if(key=='2') ID = 2;

if(key=='3') ID = 3;

if(key=='s'){

if(fout==NULL) fout = fopen("motion.txt", "w");

for(int i=0; i<20; i++){

fprintf(fout, "8.2f ",angle[i] );

}

fprintf(fout, "\n");

}else if(key=='r'){

if(fin==NULL) fin = fopen("motion.txt", "r");

for(int i=0; i<20;i++){

fscanf(fin, "%f", &angle[i] );

}

glutPostRedisplay();

}

///if(key=='0') show[0] = !show[0];/// week13 step03-1

///if(key=='1') show[1] = !show[1];/// week13 step03-1

///if(key=='2') show[2] = !show[2];/// week13 step03-1

///if(key=='3') show[3] = !show[3];/// week13 step03-1

glutPostRedisplay();

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glScalef(0.2, 0.2, 0.2);

if(body==NULL){

head = glmReadOBJ("model/head.obj");

body = glmReadOBJ("model/body.obj");

uparmR = glmReadOBJ("model/uparmR.obj");

lowarmR = glmReadOBJ("model/lowarmR.obj");

}

if(ID==0) glColor3f(1,0,0); ///紅色

else glColor3f(1,1,1); ///白色

if(show[0]) glmDraw(head, GLM_MATERIAL);

if(ID==1) glColor3f(1,0,0); ///紅色

else glColor3f(1,1,1); ///白色

if(show[1]) glmDraw(body, GLM_MATERIAL);

glPushMatrix();

glTranslatef(-1.200000, +0.453333, 0);

glRotatef(angle[2], 0, 0, 1);

glTranslatef(1.200000, -0.453333, 0);

if(ID==2) glColor3f(1,0,0);

else glColor3f(1,1,1);

if(show[2]) glmDraw(uparmR, GLM_MATERIAL);

glPushMatrix();

glTranslatef(-1.959999, +0.113333, 0);

glRotatef(angle[3], 0, 0, 1);

glTranslatef(1.959999, -0.113333, 0);

if(ID==3) glColor3f(1,0,0);

else glColor3f(1,1,1);

if(show[3]) glmDraw(lowarmR, GLM_MATERIAL);

glPopMatrix();

glColor3f(0, 1, 0);

glutSolidTeapot( 0.02 );

glutSwapBuffers();

}

int oldX = 0, oldY = 0;

void motion(int x, int y){

teapotX += (x - oldX)/150.0;

teapotY -= (y - oldY)/150.0;

angle[ID] += (x - oldX);

oldX = x;

oldY = y;

printf("glTranslatef(%f, %f, 0);\n", teapotX, teapotY);

glutPostRedisplay();

}

void mouse(int button, int state, int x, int y)

{

if(state==GLUT_DOWN){

oldX = x; ///teapotX = (x-150)/150.0;

oldY = y; ///teapotY = (150-y)/150.0;

///printf("glTranslatef(%f, %f, 0);\n", teapotX, teapotY);

///if(fout==NULL) fout = fopen("file4.txt", "w");

///fprintf(fout, "%f %f\n", teapotX, teapotY);

}

display();

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week12");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutKeyboardFunc(keyboard);

glutMainLoop();

}

2023電腦圖學二甲

2023年5月24日星期三

T week15

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張貼留言

2023年5月24日 星期三

T week15

沒有留言:

張貼留言

2023年5月24日星期三