week15
step01-1
到https://jsyeh.org/3dcg10/ 下載 data 和 win32
解壓縮後把 data 放入 windows
用不同的角度觀察模型
step01-2
安裝git
把倉庫叫出來
開新的GLUT專案 week15-1_gluLookAt
修改原來的程式碼
用不同的角度看物體
/*
* 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 */
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);
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 */
float eyeX = 0, eyeY = 0;
void motion(int x, int y){
eyeX = 3*(x-320)/320.0;
eyeY = 3*(240-y)/240.0;
glLoadIdentity();
gluLookAt(eyeX, eyeY, -3, 0, 0, -6, 0, 1, 0);
glutPostRedisplay();
}
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");
glutMotionFunc(motion);
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;
}
step02-1
嘗試修改模型的長寬比和其他的參數
glOrtho() 是預設的投影
glFrustum()便有角度張開的感覺
gluPerspective(fovy, aspect, zNrar, zFar)
fov: 視野張開的角度
aspect: 長寬比
step02-2
開新的專案 week15-2_gluPerspective
修改原來的程式碼
/*
* 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 */
static void resize(int width, int height)
{ ///aspect ratio 長寬比
const float ar = (float) width / (float) height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);///切換成投影矩陣
glLoadIdentity();
///glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
glOrtho(-ar*3, ar*3, -1.0*3, 1.0*3, 2.0, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;///設程單位矩陣
}
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;
}
更改參數有不同的呈現方式
glOrtho(-ar*3, ar*3, -1.0*3, 1.0*3, 2.0, 100.0);
glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
修改程式碼
/*
* 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 */
static void resize(int width, int height)
{ ///aspect ratio 長寬比
const float ar = (float) width / (float) height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);///切換成投影矩陣
glLoadIdentity();
///glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
///glOrtho(-ar*3, ar*3, -1.0*3, 1.0*3, 2.0, 100.0);
gluPerspective(60, ar, 0.01, 1000);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;///設程單位矩陣
}
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;
}
然後備份到雲端
step03-1
開新的專案 week15-3_gluPerspective_gluLookAt
把原來的程式碼刪掉
修改程式碼
#include <GL/glut.h>
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSolidTeapot( 0.3 );
glutSwapBuffers();
}
void motion(int x, int y){
glLoadIdentity();
float eyeX = (x-150)/150.0, eyeY = (150-y)/150.0;
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);
glutMainLoop();
}
修改程式碼
#include <GL/glut.h>
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSolidTeapot( 0.3 );
glutSwapBuffers();
}
void motion(int x, int y){
glLoadIdentity();
float eyeX = (x-150)/150.0, eyeY = (150-y)/150.0;
gluLookAt(eyeX, eyeY, 1, 0, 0, 0, 0, 1, 0);
glutPostRedisplay();
}
void reshape(int h, int w){
float ar = w / (float) h;
glViewport(0, 0, w, 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);
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week15");
glutReshapeFunc(reshape);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
備分上雲端
step03-3
開Final_Project
修改程式碼
#include <stdio.h>
#include <GL/glut.h>
#include "glm.h"
GLMmodel * head = NULL;
GLMmodel * body = NULL;
GLMmodel * rightarm = NULL;
GLMmodel * righthand = NULL;
int show[4] = {1,1,1,1};
int ID = 2;
///float angle = 0;
float angle[20] = {};
float teapotX = 0, teapotY = 0;
FILE * fout = NULL;
FILE * fin = NULL;
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;
glutPostRedisplay();
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
if(head==NULL){
head = glmReadOBJ("model/head.obj");
body = glmReadOBJ("model/body.obj");
rightarm = glmReadOBJ("model/rightarm.obj");
righthand = glmReadOBJ("model/righthand.obj");
///glmUnitize(head);
}
glPushMatrix();
glScalef(0.3, 0.3, 0.3);
glPushMatrix();
//glTranslatef(teapotX, teapotY, 0);
if(ID==0) glColor3f(1,0,0);
else glColor3f(1,1,1);
if (show[0]) glmDraw(head, GLM_MATERIAL);
glPopMatrix();
if(ID==1) glColor3f(1,0,0);
else glColor3f(1,1,1);
if (show[1]) glmDraw(body, GLM_MATERIAL);
glPushMatrix();
///glTranslatef(teapotX, teapotY, 0);
glTranslatef(+1.300000, +0.540000, 0);
glRotatef(angle[2], 0, 0, 1);
glTranslatef(-1.300000, -0.540000, 0);
if(ID==2) glColor3f(1,0,0);
else glColor3f(1,1,1);
if (show[2]) glmDraw(rightarm, GLM_MATERIAL);
glPushMatrix();
///glTranslatef(teapotX, teapotY, 0);
glTranslatef(1.939999, 0.020000, 0);
glRotatef(angle[3], 0, 0, 1);
glTranslatef(-1.939999, -0.020000, 0);
if(ID==3) glColor3f(1,0,0);
else glColor3f(1,1,1);
if (show[3]) glmDraw(righthand, GLM_MATERIAL);
glPopMatrix();
glPopMatrix();
glPopMatrix();
glColor3f(0,1,0);
glutSolidTeapot( 0.02 );
glutSwapBuffers();
}
int oldX=0, oldY=0;
void mouse(int button,int state,int x,int y)
{
if(state==GLUT_DOWN){
oldX = x;
oldY = y;
}
}
void motion(int x, int y){
teapotX += (x - oldX)/150.0*3;
teapotY -= (y - oldY)/150.0*3;
printf("glTranslatef(%f, %f, 0);\n", teapotX, teapotY);
angle[ID] += x-oldX;
oldX = x;
oldY = y;
glutPostRedisplay();
}
int main(int argc,char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14");
glutMotionFunc(motion);
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMainLoop();
}
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