Lisa的電腦圖學 - week14

 ➤ Week14-1_timer 讓茶壺轉動

1 - 開啟CodeBlocks ，新增OpenGL專案，File ➝ New ➝ Project
2 - 選取GLUT Project ➝ Go ➝ Next
3 - 點選三個點，點選目錄在桌面，加上專案名字 week14-1_timer，Next ➝ Finish

4 - 點選 week14-1_timer ➝ Sources ➝ main.c，刪除所有程式碼，並輸入

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glRotatef( angle, 0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(2000, timer, 0);

    glutMainLoop();

}

 ➤ Week14-2_timer_play 用鍵盤隨意鍵來播放

1 - 開啟CodeBlocks ，新增OpenGL專案，File ➝ New ➝ Project
2 - 選取GLUT Project ➝ Go ➝ Next
3 - 點選三個點，點選目錄在桌面，加上專案名字 week14-2_timer_play，Next ➝ Finish

4 - 點選 week14-2_timer_play ➝ Sources ➝ main.c，刪除所有程式碼，並輸入

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glRotatef( angle, 0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    //glutTimerFunc(2000, timer, 0);

    glutMainLoop();

}

➤ Week14-3_timer_alpha_interpolation

1 - 開啟CodeBlocks ，新增OpenGL專案，File ➝ New ➝ Project
2 - 選取GLUT Project ➝ Go ➝ Next
3 - 點選三個點，點選目錄在桌面，加上專案名字 week14-3_timer_alpha_interpolation，Next ➝ Finish

4 - 點選 week14-3_timer_alpha_interpolation ➝ Sources ➝ main.c，刪除所有程式碼，並輸入

#include <GL/glut.h>

float angle=0, oldAngle=0, newAngle=0;

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glRotatef( angle, 0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    if(t<100) glutTimerFunc(50, timer, t+1);

    float alpha = t /100.0;

    angle = newAngle*alpha + (1-alpha) * oldAngle;

    glutPostRedisplay();

}

void motion(int x, int y)

{

    angle = x;

    glutPostRedisplay();

}

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

{

    if(state==GLUT_DOWN) oldAngle = x;

    if(state==GLUT_UP) newAngle = x;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

➤ Final_Project

#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=0;

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();

}

FILE * fout = NULL;

FILE * fin = NULL;

float teapotX=0, teapotY=0;

float angle=0, angle2=0, angle3=0;

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);

        else glColor3f(1,1,1);

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

        if(ID==1) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        if(ID==2) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        if(ID==3) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        glTranslated(teapotX, teapotY, 0);

        glPopMatrix();

        glPopMatrix();

    glutSwapBuffers();

}

int oldX = 0, oldY = 0;

void motion(int x, int y){

    teapotX += (x - oldX)/150.0;

    teapotY -= (y - oldY)/150.0;

    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;

        oldY = y;

        angle = x;

    }

    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();

}

#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] = {0, 1, 1, 0};

int ID = 2;

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();

}

FILE * fout = NULL;

FILE * fin = NULL;

float teapotX=0, teapotY=0;

float angle=0, angle2=0, angle3=0;

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);

        else glColor3f(1,1,1);

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

        if(ID==1) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        glTranslatef(-1.200000, +0.453333, 0);

        glRotatef(angle, 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);

        if(ID==3) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        glTranslated(teapotX, teapotY, 0);

        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 += x-old;

    oldX = x;

    oldY = y;

    angle = x;

    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;

        oldY = y;

        ///angle = x;

    }

    display();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

#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;

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();

}

FILE * fout = NULL;

FILE * fin = NULL;

float teapotX=0, teapotY=0;

float angle=0, angle2=0, angle3=0;

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);

        else glColor3f(1,1,1);

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

        if(ID==1) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        glTranslatef(-1.200000, +0.453333, 0);

        glRotatef(angle, 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);

        if(ID==3) glColor3f(1, 0, 0);

        else glColor3f(1,1,1);

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

        glTranslated(teapotX, teapotY, 0);

        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 += x-oldX;

    oldX = x;

    oldY = y;

    angle = x;

    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;

        oldY = y;

        ///angle = x;

    }

    display();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}